Filed Pursuant to Rule 424(b)(5)
Registration No. 333-209889

The information contained in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has become effective by rule of the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities, and we are not soliciting an offer to buy these securities, in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION

PRELIMINARY PROSPECTUS SUPPLEMENT DATED SEPTEMBER 10, 2018

PROSPECTUS SUPPLEMENT

(To Prospectus dated August 6, 2018)

15,000,000 Units

INTERNATIONAL FLAVORS & FRAGRANCES INC.

    % TANGIBLE EQUITY UNITS

We are offering 15,000,000     % tangible equity units, or “Units.” Each Unit has a stated amount of $50. Each Unit is comprised of (i) a prepaid stock purchase contract issued by us and (ii) a senior amortizing note due September 15, 2021 issued by us. Each amortizing note will have an initial principal amount of $         and a final installment payment date of September 15, 2021.

Unless earlier redeemed by us or settled earlier at your option or at our option as described herein, on September 15, 2021 (subject to postponement in certain limited circumstances), each purchase contract will automatically settle, and we will deliver a number of shares of our common stock, par value $0.125 per share, per purchase contract based on the applicable market value (as defined herein) of our common stock as set forth below:

At any time prior to the second scheduled trading day immediately preceding September 15, 2021, you may settle your purchase contracts early, and we will deliver             shares of our common stock per purchase contract (subject to adjustment). In addition, if a “fundamental change” (as defined herein) occurs and you elect to settle your purchase contracts early in connection with such fundamental change, you will receive a number of shares of our common stock per purchase contract equal to the fundamental change early settlement rate, as described herein. We may elect to settle all, but not less than all, outstanding purchase contracts prior to September 15, 2021 at the “early mandatory settlement rate” (as defined herein). If the closing of the Merger (as defined herein) has not occurred on or prior to February 7, 2019, or if, prior to such date, the Merger Agreement (as defined herein) is terminated, we may elect to settle all, but not less than all, outstanding purchase contracts at the “merger redemption rate” (as defined herein), by delivering notice to all holders during the five business day period immediately following February 7, 2019.

The amortizing notes will pay you equal quarterly cash installments of $         per amortizing note, which cash payment in the aggregate will be equivalent to     % per year with respect to each $50 stated amount of Units. The amortizing notes are our direct, unsecured and unsubordinated obligations and will rank equally with all of our other unsecured and unsubordinated indebtedness from time to time outstanding. If we elect to redeem the purchase contracts or to settle the purchase contracts early, you will have the right to require us to repurchase your amortizing notes.

We have applied to list the Units on the New York Stock Exchange (“NYSE”) under the symbol “IFFT,” subject to satisfaction of its minimum listing standards with respect to the Units. If the Units are approved for listing, we expect trading on the NYSE to begin within 30 calendar days after the Units are first issued.

Our common stock is listed on the NYSE and Euronext Paris under the symbol “IFF.” On September 7, 2018, the last reported sale price of our common stock on the NYSE was $127.06 per share.

On May 7, 2018, International Flavors & Fragrances Inc. (“IFF”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Frutarom Industries Ltd., a company organized under the laws of the State of Israel (“Frutarom”), and Icon Newco Ltd., a company organized under the laws of the State of Israel and a wholly owned subsidiary of IFF (“Merger Sub”). Pursuant to the Merger Agreement, subject to the satisfaction or waiver of specified conditions, and in accordance with the Companies Law 5759-1999 of the State of Israel (together with the rules and regulations thereunder, the “ICL”), Merger Sub will merge with and into Frutarom (the “Merger”), with Frutarom continuing as the surviving company in the Merger and a wholly owned subsidiary of IFF.

Concurrently with this offering of Units, we are offering $1,500 million aggregate offering value of our common stock (or up to $1,650 million in aggregate offering value if the underwriters for that offering exercise their option to purchase additional shares of common stock) pursuant to a separate prospectus supplement. This would be 11,805,446 shares (or up to 12,985,990 shares if the underwriters for that offering exercise their option) based on an aggregate offering value of $1,500 million of shares of common stock at an assumed public offering price of $127.06 per share (the last reported sale price of our common stock on the NYSE on September 7, 2018). The completion of this Units offering is not contingent on the completion of the common stock offering, and the completion of the common stock offering is not contingent on the completion of this Units offering. Neither this offering nor the common stock offering is contingent on the completion of the Merger or any debt financing. If the Merger is not consummated, we intend to use the net proceeds from this offering, after payment of any cash redemption amount and/or repurchase price, for general corporate purposes, as described under “Use of Proceeds.”

Subsequent to this offering, we expect to offer, pursuant to separate prospectus supplements, approximately $2,750 million aggregate principal amount of senior notes at varying maturities, a portion of which may be denominated in currencies other than the U.S. dollar, as additional financing for the Merger. This prospectus supplement is not an offer to sell or a solicitation of an offer to buy any notes being offered in the notes offering.

Investing in our Units involves significant risks. See “Risk Factors” in this prospectus supplement and the documents incorporated by reference into this prospectus supplement and the accompanying prospectus, including our Annual Report on Form 10-K for the year ended December 31, 2017.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

PRICE $                 PER UNIT

We have granted the underwriters an option to purchase, exercisable within a 30-day period, up to an additional 1,500,000 Units. The underwriters expect to deliver the Units to purchasers on or about September             , 2018.

Joint Book-Running Managers

The date of this prospectus supplement is September                 , 2018.

TABLE OF CONTENTS

Unless we have indicated, or the context otherwise requires, references in this prospectus supplement to “IFF,” “the Company,” “we,” “us,” “our,” or similar terms are to International Flavors & Fragrances Inc. and its subsidiaries.

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ABOUT THIS PROSPECTUS SUPPLEMENT

We are providing information to you about this offering in two parts. The first part is this prospectus supplement, which provides the specific details regarding this offering. The second part is the accompanying prospectus, which provides general information. Generally, when we refer to this “prospectus,” we are referring to both documents combined. This prospectus supplement may add, update or change information contained in or incorporated by reference in the accompanying prospectus. Some of the information contained in or incorporated by reference in the accompanying prospectus may not apply to this offering. If the information in this prospectus supplement or the information incorporated by reference in this prospectus supplement is inconsistent with information contained in or incorporated by reference in the accompanying prospectus, you should rely on the information in this prospectus supplement or the information incorporated by reference in this prospectus supplement.

We are responsible for the information contained and incorporated by reference in this prospectus supplement, the accompanying prospectus and in any free writing prospectus with respect to this offering filed by us with the Securities and Exchange Commission (the “SEC”). We have not, and the underwriters have not, authorized anyone to give you any other information, and we take no responsibility for any other information that others may give you. This prospectus supplement, the accompanying prospectus and any such free writing prospectus may be used only for the purposes for which they have been prepared. We are not, and the underwriters are not, making an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in this prospectus supplement, the accompanying prospectus, any free writing prospectus and the documents incorporated by reference herein and therein is accurate as of any date other than their respective dates. Our business, financial condition, liquidity, results of operations and prospects may have changed since those dates.

The Units are being offered for sale only in jurisdictions where it is lawful to make such offers. The distribution of this prospectus supplement and the accompanying prospectus and the offering of the Units in certain jurisdictions may be restricted by law. Persons outside the United States who receive this prospectus supplement and the accompanying prospectus should inform themselves about and observe any such restrictions. This prospectus supplement and the accompanying prospectus do not constitute, and may not be used in connection with, an offer or solicitation by anyone in any jurisdiction in which such offer or solicitation is not authorized or in which the person making such offer or solicitation is not authorized or in which the person making such offer or solicitation is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation. See “Underwriting” in this prospectus supplement.

Unless we specifically state otherwise, the information in this prospectus supplement and the accompanying prospectus, including the documents incorporated by reference herein and therein, assumes the completion of the concurrent common stock offering described herein and that the underwriters for this Units offering do not exercise their option to purchase additional Units and the underwriters of the concurrent common stock offering do not exercise their option to purchase additional shares of common stock. In addition, unless we specifically state otherwise, the information in this prospectus supplement and the accompanying prospectus, including the documents incorporated by reference herein and therein, does not give effect to the Merger or the Debt Financings (each as defined below).

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RISK FACTORS

An investment in the Units involves significant risks. You should consult with your own financial and legal advisers and carefully consider, among other matters, the following risks and those described in our Annual Report on Form 10-K for the year ended December 31, 2017, our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2018 and June 30, 2018, respectively, and the other documents incorporated herein by reference. You should carefully consider the risks described in those reports and the other information in this prospectus supplement and accompanying prospectus before you decide to invest in the Units. Such risks and uncertainties are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect us. If any of those risks were to occur, our financial condition, operating results and prospects, as well as the value of the Units, could be materially adversely affected.

Risks Related to Our Business

For a discussion of risks related to our business and operations, please see “Item 1A. Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for our fiscal year ended December 31, 2017, as well as similar disclosures contained in our other filings with the SEC that are incorporated by reference in this prospectus supplement and the accompanying prospectus. See “Incorporation of Certain Information by Reference.”

Risks Related to the Merger

If we are unable to complete the Merger, in a timely manner or at all, our business and our stock price may be adversely affected.

Our and Frutarom’s obligations to consummate the Merger are subject to the satisfaction or waiver of the following customary conditions, including: (i) the approval of the Merger Agreement and the Merger by the shareholders of Frutarom, which was obtained on August 6, 2018; (ii) the receipt of regulatory clearance under certain foreign antitrust laws, including the European Union; (iii) receipt of all governmental and stock exchange approvals necessary for the issuance and listing of shares of IFF common stock as contemplated by the Merger Agreement, (iv) the absence of any order, or the enactment of any law, prohibiting the Merger; (v) subject to certain exceptions, the accuracy of the representations and warranties of the parties and compliance by the parties with their respective obligations under the Merger Agreement; and (vi) the absence of any material adverse effect on Frutarom or our company since the date of the Merger Agreement. Furthermore, our ability to access the bridge financing facility is subject to customary conditions. As many of these conditions are outside of our control, we cannot assure you if the conditions to the completion of the Merger and the associated financings will be satisfied in a timely manner or at all which may affect when and whether the Merger will occur. If the Merger is not completed, our share price could fall to the extent that our current price reflects an assumption that we will complete the Merger. Furthermore, if the Merger is not completed and the Merger Agreement is terminated, we may suffer other consequences that could adversely affect our business, results of operations and share price, including the following:

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We may not realize the benefits anticipated from the Merger, which could adversely affect our stock price.

The Merger, if completed, will be our largest acquisition to date. The anticipated benefits from the Merger are, necessarily, based on projections and assumptions about the combined businesses of our company and Frutarom, which may not materialize as expected or which may prove to be inaccurate. Our ability to achieve the anticipated benefits will depend on our ability to successfully and efficiently integrate the business and operations of Frutarom with our business and achieve the expected synergies. We may encounter significant challenges with successfully integrating and recognizing the anticipated benefits of the potential Merger, including the following:

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In addition, our anticipated benefits of the transaction with Frutarom contemplate significant cost-saving synergies. Consequently, even if we are able to successfully integrate the operations of Frutarom with ours, we may not realize the full benefits of the transactions if we are unable to identify and implement the anticipated cost savings or if the actions taken to implement such cost-savings have unintended consequences on our other business operations.

If we do not successfully manage these issues and the other challenges inherent in integrating an acquired business of the scale of Frutarom, then we may not achieve the anticipated benefits of the Merger, we could incur unanticipated expenses and charges and our operating results and the value of our common stock could be materially and adversely affected.

Uncertainty about the Merger may adversely affect our relationships with customers and employees, which could negatively affect our business, whether or not the Merger is completed.

The announcement of the Merger on May 7, 2018, whether or not completed, may cause uncertainties in our relationships with our customers which could impair our ability to or expand our historical customer sales growth. Furthermore, uncertainties about the Merger may cause our current and prospective employees to experience uncertainty about their future with us. These uncertainties may impair our ability to retain, recruit or motivate key employees which could affect our business.

The Merger may result in significant charges or other liabilities that could adversely affect the financial results of the combined company.

The financial results of the combined company, following IFF’s acquisition of Frutarom, may be adversely affected by cash expenses and non-cash accounting charges incurred in connection with our integration of the business and operations of Frutarom. Furthermore, as a result of the transaction we will record a significant amount of goodwill and other intangible assets on our consolidated financial statements, which could be subject to impairment based upon future adverse changes in our business or prospects including our inability to recognize the benefits anticipated by the transaction.

In addition, upon the acquisition of Frutarom we will assume all their liabilities, including unknown and contingent liabilities that Frutarom assumed in connection with their acquisitions, that we failed or were unable to identify in the course of performing due diligence. Frutarom has completed 47 acquisitions since 2011, including 22 since the beginning of 2016. Our ability to accurately identify and assess the magnitude of the liabilities assumed by Frutarom in these acquisitions may be limited by, among other things, the information available to us and Frutarom and the limited operating experience that Frutarom has with these acquired entities. Furthermore, Frutarom has additional future obligations regarding certain of these acquisitions including outstanding earn-out obligations and put options requiring Frutarom to purchase additional shares in the target company, which we will assume upon consummation of the transaction. If we are not able to completely assess the scope of these liabilities or if these liabilities are neither probable nor estimable at this time, our future financial results could be adversely affected by unanticipated reserves or charges, unexpected litigation or regulatory exposure, unfavorable accounting charges, unexpected increases in taxes due, a loss of anticipated tax benefits or other adverse effects on our business, operating results or financial condition. The price of our common stock following the Merger could decline to the extent the combined company’s financial results are materially affected by any of these events.

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The regulatory approvals required in connection with the Merger may not be obtained or may contain materially burdensome conditions.

Completion of the Merger is conditioned upon the receipt of certain regulatory approvals, and we cannot provide assurance that these approvals will be obtained. If any conditions or changes to the proposed structure of the Merger are required to obtain these regulatory approvals, they may have the effect of jeopardizing or delaying completion of the Merger or reducing the anticipated benefits of the Merger. If we agree to any material conditions in order to obtain any approvals required to complete the Merger, the business and results of operations of the combined company may be adversely affected.

The use of cash and incurrence of significant indebtedness in connection with the financing of the Merger may have an adverse impact on our liquidity, limit our flexibility in responding to other business opportunities and increase our vulnerability to adverse economic and industry conditions.

The Merger will be financed in part by the use of our cash on hand, the incurrence of a significant amount of indebtedness and issuances of equity. As of June 30, 2018, we had approximately $322.4 million of cash and cash equivalents and approximately $1,723.7 million of total debt outstanding. In connection with the Merger, we expect to incur significant new debt. The proceeds from the new debt are expected to be used to pay part of the purchase price, refinance existing debt of both our company and Frutarom and pay transaction related fees and expenses. If we are unable to raise financing on acceptable terms, we may need to rely on our bridge loan facility, which may result in higher borrowing costs and a shorter maturity than those from other anticipated financing alternatives. The use of cash on hand and indebtedness to finance the Merger will reduce our liquidity and could cause us to place more reliance on cash generated from operations to pay principal and interest on our debt, thereby reducing the availability of our cash flow for working capital, dividend and capital expenditure needs or to pursue other potential strategic plans. The increased indebtedness may also have the effect, among other things, of limiting our ability to obtain additional financing, if needed, limiting our flexibility in the conduct of our business and making us more vulnerable to economic downturns and adverse competitive and industry conditions.

Risks Related to the Units, the Separate Purchase Contracts and the Separate Amortizing Notes

If the closing of the Merger has not occurred on or prior to February 7, 2019, or if, prior to such date, the Merger Agreement is terminated, we may redeem the purchase contracts for an amount of cash and/or a number of shares of our common stock (depending on the price of our common stock at the time of redemption) with a value that may not adequately compensate you for any lost option value.

Our planned acquisition of Frutarom may not be consummated. See “—Risks Related to our Planned Acquisition of Frutarom.” If the closing of the Merger has not occurred on or prior to February 7, 2019, or if, prior to such date, the Merger Agreement is terminated, we may elect to redeem all, but not less than all, of the outstanding purchase contracts by delivering notice within the five business days immediately following February 7, 2019. We will pay or deliver, as the case may be, a redemption amount to be determined based on the price of our common stock at that time in cash or in shares of our common stock in accordance with the terms of the purchase contracts (as described under “Description of the Purchase Contracts—Merger Termination Redemption”). If we elect to redeem the purchase contracts, we may be required by the holders thereof to repurchase the amortizing notes at the repurchase price set forth under “Description of the Amortizing Notes—Repurchase of Amortizing Notes at the Option of the Holder.” The redemption amount that you receive upon a merger termination redemption may not adequately compensate you for any lost option value of the purchase contracts. In addition, if the Merger is not consummated, the net proceeds from this offering and of the concurrent common stock offering, if completed, will not be used to consummate the Merger. Instead, we intend to use the net proceeds from this offering and concurrent common stock offering, if completed, after payment of any cash redemption amount and/or repurchase price, as described above, for general corporate purposes.

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You will bear the risk that the market value of our common stock may decline.

The purchase contracts, pursuant to which we will deliver to you shares of our common stock, are components of the Units. The number of shares of common stock that you will receive upon settlement of a purchase contract on the mandatory settlement date, whether as a component of a Unit or a separate purchase contract, will depend upon the applicable market value, which is equal to the arithmetic average of the daily VWAPs of our common stock on each of the 20 consecutive trading days beginning on, and including, the 21st scheduled trading day immediately preceding September 15, 2021. There can be no assurance that the market value of the common stock received by you will be greater than or equal to the reference price of approximately $            . If the applicable market value of our common stock is less than the reference price, then the market value of the common stock issued to you on the mandatory settlement date (assuming that the market value is the same as the applicable market value of the common stock) will be less than the effective price per share paid by you for such common stock on the date of issuance of the Units. Furthermore, because we will in no event deliver more than                 shares (subject to adjustment as described herein) upon settlement of a purchase contact, the market value of the common stock delivered to you upon any early settlement may be less than the effective price per share paid to you for such common stock on the date of the issuance of the Units. Therefore, you assume the entire risk that the market value of our common stock may decline before the mandatory settlement date, early settlement date, fundamental change early settlement date, merger redemption settlement date or early mandatory settlement date, as applicable. Any decline in the market value of our common stock may be substantial.

See “—Risks Related to Our Common Stock” for a discussion of risks related to our common stock.

The opportunity for equity appreciation provided by an investment in the Units is less than that provided by a direct investment in our common stock.

The aggregate market value of our common stock delivered to you upon settlement of a purchase contract on the mandatory settlement date generally will exceed the $50 stated amount of each Unit only if the applicable market value of our common stock exceeds the threshold appreciation price. Therefore, during the period prior to the mandatory settlement date, an investment in a Unit affords less opportunity for equity appreciation than a direct investment in our common stock. If the applicable market value exceeds the reference price but is less than the threshold appreciation price, you will realize no equity appreciation on our common stock above the reference price. Furthermore, if the applicable market value exceeds the threshold appreciation price, you would receive only a portion of the appreciation in the market value of the shares of our common stock you would have received had you purchased shares of common stock with $50 at the public offering price in the concurrent common stock offering. See “Description of the Purchase Contracts—Delivery of Common Stock” for a table showing the number of shares of common stock that you would receive at various applicable market values.

We may not be able to settle or redeem your purchase contracts and deliver shares of our common stock, or make payments on the amortizing notes or repurchase the amortizing notes, in the event that we file for bankruptcy.

Pursuant to the terms of the purchase contract agreement, your purchase contracts will automatically accelerate upon the occurrence of specified events of bankruptcy, insolvency or reorganization with respect to us.

A bankruptcy court may prevent us from delivering our common stock to you in settlement or redemption of your purchase contracts. In such circumstances or if for any other reason the accelerated purchase contracts are not settled by the delivery of common stock, your resulting claim for damages against us following such acceleration will rank pari passu with the claims of holders of our common stock in the relevant bankruptcy proceeding. As such, to the extent we fail to deliver common stock to you upon such an acceleration, you will only be able to recover damages to the extent holders of our common stock receive any recovery. See “Description of the Purchase Contracts—Consequences of Bankruptcy.”

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In addition, with respect to the amortizing notes, bankruptcy law and bankruptcy-related court orders generally prohibit the payment of pre-bankruptcy debt by a company that has commenced a bankruptcy case while the case is pending. If we become a debtor in a bankruptcy case, so long as the case was pending, you would likely not receive timely installment payments under, or, if you exercised your right to require repurchase following a merger termination redemption or early mandatory settlement, receive any repurchase price on, the amortizing notes.

The amortizing notes will be subject to the prior claims of any secured creditors, and if a default occurs, we may not have sufficient funds to fulfill our obligations under the amortizing notes.

The amortizing notes are unsecured obligations, ranking equally with our other senior unsecured indebtedness and effectively junior to any secured indebtedness we may incur. If we incur secured debt, our assets securing any such indebtedness will be subject to prior claims by our secured creditors. In the event of the bankruptcy, insolvency, liquidation, reorganization, dissolution or other winding up of the Company, our assets that secure debt will be available to pay obligations on the amortizing notes only after all debt secured by those assets has been repaid in full. If there are not sufficient assets remaining to pay all creditors, then all or a portion of the amortizing notes then outstanding would remain unpaid. Additionally, if any portion of the amount payable on the amortizing notes upon acceleration is considered by a court to be unearned interest, the court could disallow recovery of any such portion.

The amortizing notes are structurally subordinated to the indebtedness and other liabilities of our subsidiaries.

The amortizing notes are our obligations exclusively and not of any of our subsidiaries. In the year ended December 31, 2017, International Flavors & Fragrances Inc. generated approximately 21% of our consolidated net sales and 14% of our consolidated gross profit (excluding intercompany sales) at the parent level, while our subsidiaries generated approximately 79% of our consolidated net sales and 86% of our consolidated gross profit. Our subsidiaries are separate legal entities that have no obligation to pay any amounts due under the amortizing notes or to make any funds available therefor, whether by dividends, loans or other payments. Except to the extent we are a creditor with recognized claims against our subsidiaries, all claims of creditors, including trade creditors of our subsidiaries, will have priority with respect to the assets of such subsidiaries over our claims (and therefore the claims of our creditors, including holders of the amortizing notes). Consequently, the amortizing notes will be structurally subordinated to all liabilities, including trade payables, of our subsidiaries and any subsidiaries that we may in the future acquire or establish. As of June 30, 2018, our subsidiaries (i) had approximately $884.0 million of outstanding liabilities and (ii) as adjusted for this offering, would have had $884.0 million of outstanding liabilities, in each case including trade payables, but excluding intercompany liabilities and deferred gains.

In addition, the indenture governing the amortizing notes permits our subsidiaries to incur additional indebtedness, and does not contain any limitation on the amount of other liabilities, such as trade payables, that may be incurred by our subsidiaries.

The trading prices for the Units, the purchase contracts and the amortizing notes will be directly affected by the trading prices for our common stock, the general level of interest rates and our credit quality, each of which is impossible to predict.

It is impossible to predict whether the prices of our common stock, interest rates or our credit quality will rise or fall. Trading prices of the common stock will be influenced by general stock market conditions and our operating results and business prospects and other factors described elsewhere in this section “Risk Factors.”

The market for our common stock likely will influence, and be influenced by, any market that develops for the Units or the separate purchase contracts. For example, investors’ anticipation of the distribution into the market of the additional shares of common stock issuable upon settlement of the purchase contracts could

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depress the price of our common stock and increase the volatility of the common stock price, which could in turn depress the price of the Units or the separate purchase contracts. The price of our common stock also could be affected by possible sales of such common stock by investors who view the Units as a more attractive means of equity participation in us and by hedging or arbitrage trading activity that is likely to develop involving the Units, separate purchase contracts and the common stock. Such hedging or arbitrage activity could, in turn, affect the trading prices of the Units, the separate purchase contracts and the common stock.

In addition, in general, as market interest rates rise, notes (such as the amortizing notes) bearing interest at a fixed rate generally decline in value because the premium, if any, over market interest rates will decline. Consequently, if you purchase Units and market interest rates increase, the market value of the amortizing notes forming a portion of the Units may decline. We cannot predict the future level of market interest rates.

Regulatory actions and other events may adversely affect the trading price and liquidity of the Units.

We expect that many investors in, and potential purchasers of, the Units will employ, or seek to employ, an equity-linked arbitrage strategy with respect to the Units. Investors would typically implement such a strategy by selling short the common stock underlying the Units and dynamically adjusting their short position while continuing to hold the Units. Investors may also implement this type of strategy by entering into swaps on our common stock in lieu of or in addition to short selling the common stock. The SEC and other regulatory and self-regulatory authorities have implemented various rules and taken certain actions, and may in the future adopt additional rules and take other actions, that may impact those engaging in short selling activity involving equity securities (including our common stock). Such rules and actions include Rule 201 of SEC Regulation SHO, the adoption by the Financial Industry Regulatory Authority, Inc. and the national securities exchanges of a “Limit Up-Limit Down” program, the imposition of market-wide circuit breakers that halt trading of securities for certain periods following specific market declines, and the implementation of certain regulatory reforms required by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010. Any governmental or regulatory action that restricts the ability of investors in, or potential purchasers of, the Units to effect short sales of our common stock, borrow our common stock or enter into swaps on our common stock could adversely affect the trading price and the liquidity of the Units.

In addition, if investors and potential purchasers seeking to employ an equity-linked arbitrage strategy are unable to borrow or enter into swaps on our common stock, in each case, on commercially reasonable terms, the trading price and liquidity of the Units may be adversely affected.

You may receive shares of common stock upon settlement of the purchase contracts that are lower in value than the price of the common stock just prior to the mandatory settlement date or merger redemption settlement date, as the case may be.

Because the applicable market value of the common stock is determined over (i) the 20 consecutive trading days beginning on, and including, the 21st scheduled trading day immediately preceding September 15, 2021, in the case of settlement on the mandatory settlement date, or (ii) the five consecutive trading day period ending on, and including, the trading day immediately preceding February 7, 2019, in the case of merger termination redemption, the number of shares of common stock delivered for each purchase contract may, on the mandatory settlement date or the merger redemption settlement date, as the case may be, be greater than or less than the number of shares that would have been delivered based on the closing price (or daily VWAP) of the common stock on the last trading day in the related five or 20 trading day period. In addition, you will bear the risk of fluctuations in the market price of the shares of common stock deliverable upon settlement of the purchase contracts between the end of such period and the date such shares are delivered.

If you elect to settle your purchase contracts early, you may not receive the same return on your investment as purchasers whose purchase contracts are settled on the mandatory settlement date.

Holders of the Units or separate purchase contracts have the option to settle their purchase contracts early at any time beginning on, and including, the business day immediately following the date of initial issuance of the

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Units until the second scheduled trading day immediately preceding September 15, 2021. However, if you settle your purchase contracts prior to the second scheduled trading day immediately preceding September 15, 2021, you will receive for each purchase contract a number of shares of common stock equal to the minimum settlement rate, regardless of the current market value of our common stock, unless you elect to settle your purchase contracts early in connection with a fundamental change, in which case you will be entitled to settle your purchase contracts at the fundamental change early settlement rate, which may be greater than the minimum settlement rate. In either case, you may not receive the same return on your investment as purchasers whose purchase contracts are settled on the mandatory settlement date.

The fundamental change early settlement rate or the amount of cash and/or number of shares of our common stock paid or delivered, as the case may be, upon a merger termination redemption, may not adequately compensate you.

If a “fundamental change” occurs and you elect to exercise your fundamental change early settlement right, you will be entitled to settle your purchase contracts at the fundamental change early settlement rate. In addition, in connection with any merger termination redemption, upon redemption of the purchase contracts, you will be paid an amount of cash equal to the redemption amount (or, in certain circumstances, a number of shares of our common stock or any combination of cash and shares of our common stock). Although the fundamental change early settlement rate or the redemption amount, as the case may be, is designed to compensate you for the lost option value of your purchase contracts as a result of the early settlement of the purchase contracts, this feature may not adequately compensate you for such loss. In addition, if the stock price in the fundamental change is greater than $ per share (subject to adjustment), this feature of the purchase contracts will not compensate you for any additional loss suffered in connection with a fundamental change. See “Description of the Purchase Contracts—Early Settlement Upon a Fundamental Change” and “Description of the Purchase Contracts—Merger Termination Redemption.”

Our obligation to settle the purchase contracts at the fundamental change early settlement rate or to redeem the purchase contracts pursuant to a merger termination redemption could be considered a penalty, in which case the enforceability thereof would be subject to general principles of reasonableness of economic remedies.

The minimum settlement rate, maximum settlement rate, reference price and threshold appreciation price of the purchase contracts may not be adjusted for all dilutive events and any adjustment may not be adequate compensation for lost value.

The minimum settlement rate, maximum settlement rate, reference price and threshold appreciation price of the purchase contracts are subject to adjustment for certain events, including, but not limited to, certain dividends on our common stock, the issuance of certain rights, options or warrants to holders of our common stock, subdivisions or combinations of our common stock, certain distributions of assets, debt securities, capital stock or cash to holders of our common stock and certain tender offers or exchange offers, as described under “Description of the Purchase Contracts—Adjustments to the Fixed Settlement Rates” in this prospectus supplement. The minimum settlement rate, maximum settlement rate, reference price and threshold appreciation price will not be adjusted for other events that may adversely affect the trading price of the purchase contracts or the Units and the market price of our common stock, such as employee stock options grants, offerings of our common stock for cash (including under the concurrent common stock offering), certain exchanges of our common stock for our other securities or in connection with acquisitions (including the Merger) and other transactions. The terms of the Units and the separate purchase contracts do not restrict our ability to engage in these activities, and events may occur that are adverse to the interests of the holders of the purchase contracts or the Units and their value, but that do not result in an adjustment to the minimum settlement rate, maximum settlement rate, reference price and threshold appreciation price, or that result in an adjustment that is not adequate compensation for lost value.

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We may incur additional indebtedness.

As of June 30, 2018, we had $1,723.7 million of debt outstanding. The indenture governing the amortizing notes does not prohibit us from incurring additional unsecured indebtedness or secured indebtedness that would be effectively senior to the amortizing notes in the future. The indenture governing the amortizing notes also permits unlimited additional borrowings by our subsidiaries that are effectively senior to the amortizing notes. In addition, the indenture does not contain any restrictive covenants limiting our ability to pay dividends or make payments on junior or other indebtedness.

The Units are not protected by restrictive covenants.

Neither the purchase contracts nor the indenture contains any financial or operating covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by us or any of our subsidiaries. Neither the purchase contracts nor the indenture contains any covenants or other provisions to afford protection to holders of the purchase contracts or the amortizing notes in the event of a fundamental change involving International Flavors & Fragrances Inc. except, with respect to the purchase contracts, to the extent described under “Description of the Units—Early Settlement Upon a Fundamental Change.”

Until the purchase contracts are settled with, or redeemed for, common stock, you will not be entitled to any rights with respect to our common stock, but you will be subject to all changes made with respect to our common stock.

Until the date on which you are treated as the record holder of common stock on account of a redemption or settlement of the purchase contracts for or with, as the case may be, common stock, you will not be entitled to any rights with respect to our common stock, including voting rights and rights to receive any dividends or other distributions on our common stock, but you will be subject to all changes affecting the common stock. You will be treated as the record holder of any shares of our common stock issuable upon settlement or redemption of the purchase contracts only as follows:

For example, in the event that an amendment is proposed to our restated certificate of incorporation or by-laws requiring stockholder approval and the record date for determining the stockholders of record entitled to

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vote on the amendment occurs prior to the date specified above on which you are treated as the record holder of the shares of our common stock, you will not be entitled to vote on the amendment, although you will nevertheless be subject to any changes in the powers, preferences or special rights of our common stock once you become a stockholder.

Some significant restructuring transactions may not constitute fundamental changes, in which case we would not be obligated to early settle the purchase contracts, and you will not have the right to require repurchase of your amortizing notes upon a fundamental change.

Upon the occurrence of specified fundamental changes, you will have the right to require us to settle the purchase contracts. You will not have the right to require repurchase of your amortizing notes upon a fundamental change, however. Additionally, the definition of “fundamental change” herein is limited to specified corporate events and may not include other events that might adversely affect our financial condition or the value of the purchase contracts. For example, events such as leveraged recapitalizations, refinancings, restructurings or acquisitions initiated by us may not constitute a fundamental change requiring us to settle the purchase contracts at the applicable fundamental change early settlement rate. In the event of any such events, the holders of the purchase contracts would not have the right to require us to settle the purchase contracts at the applicable fundamental change early settlement rate, even though each of these transactions could increase the amount of our indebtedness, or otherwise adversely affect our capital structure or any credit ratings, thereby adversely affecting the trading price of the purchase contracts and/or the amortizing notes.

We may not have the ability to raise the funds necessary to repurchase the amortizing notes following the exercise of our early mandatory settlement right or in connection with a merger termination redemption, and our debt outstanding at that time may contain limitations on our ability to repurchase the amortizing notes.

If we elect to exercise our early mandatory settlement right or effect a merger termination redemption, holders of the amortizing notes will have the right to require us to repurchase the amortizing notes on the repurchase date at the repurchase price described under “Description of the Amortizing Notes—Repurchase of Amortizing Notes at the Option of the Holder.” However, we may not have enough available cash or be able to obtain financing at the time we are required to make repurchases of amortizing notes surrendered for repurchase. In addition, our ability to pay the relevant repurchase price for the amortizing notes may be limited by agreements governing our current and future indebtedness. Our failure to repurchase amortizing notes at a time when the repurchase is required by the indenture would constitute a default under the indenture. A default under the indenture could also lead to a default under agreements governing our indebtedness outstanding at that time. If the repayment of the related indebtedness were to be accelerated after any applicable notice or grace periods, we may not have sufficient funds to repay the indebtedness and the repurchase price for the amortizing notes.

The secondary market for the Units, the purchase contracts and the amortizing notes may be illiquid.

We have applied to list the Units on the NYSE under the symbol “IFFT”, subject to satisfaction of its minimum listing standards with respect to the Units. However, we cannot assure you that the Units will be approved for listing. If the Units are approved for listing, we expect that the Units will begin trading on the NYSE within 30 calendar days after the Units are first issued. In addition, the underwriters have advised us that they intend to make a market in the Units, but the underwriters are not obligated to do so. However, listing on the NYSE does not guarantee that a trading market will develop, and the underwriters may discontinue market making at any time in their sole discretion without prior notice to Unit holders. Accordingly we cannot assure you that a liquid trading market will develop for the Units (or, if developed, that a liquid trading market will be maintained), that you will be able to sell Units at a particular time or that the prices you receive when you sell will be favorable.

Beginning on the business day immediately succeeding the date of initial issuance of the Units, purchasers of Units will be able to separate each Unit into a purchase contract and an amortizing note. We are unable to predict

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how the separate purchase contracts or the separate amortizing notes will trade in the secondary market, or whether that market will be liquid or illiquid. We will not initially apply to list the separate purchase contracts or the separate amortizing notes on any securities exchange or automated inter-dealer quotation system, but we may apply to list such separate purchase contracts and separate amortizing notes in the future as described herein. If (i) a sufficient number of Units are separated into separate purchase contracts and separate amortizing notes and traded separately such that applicable listing requirements are met and (ii) a sufficient number of holders of such separate purchase contracts and separate amortizing notes request that we list such separate purchase contracts and separate amortizing notes, we may endeavor to list such separate purchase contracts and separate amortizing notes on an exchange of our choosing (which may or may not be the NYSE) subject to applicable listing requirements. However, even if we do so apply to list such separate purchase contracts or separate amortizing notes, we cannot assure you that such securities will be approved for listing.

The purchase contract agreement will not be qualified under the Trust Indenture Act, and the obligations of the purchase contract agent are limited.

The purchase contract agreement between us and the purchase contract agent will not be qualified as an indenture under the Trust Indenture Act of 1939, and the purchase contract agent will not be required to qualify as a trustee under the Trust Indenture Act. Thus, you will not have the benefit of the protection of the Trust Indenture Act with respect to the purchase contract agreement or the purchase contract agent. The amortizing notes constituting a part of the Units will be issued pursuant to an indenture, which has been qualified under the Trust Indenture Act. Accordingly, if you hold Units, you will have the benefit of the protections of the Trust Indenture Act only to the extent applicable to the amortizing notes. The protections generally afforded the holder of a security issued under an indenture that has been qualified under the Trust Indenture Act include:

The U.S. federal income tax consequences relating to the Units are uncertain.

No statutory, judicial or administrative authority directly addresses the characterization of the Units or instruments similar to the Units for U.S. federal income tax purposes. As a result, some aspects of the U.S. federal income tax consequences of an investment in the Units are not certain. Specifically, the amortizing notes and the purchase contracts could potentially be recharacterized as a single instrument for U.S. federal income tax purposes, in which case (i) “U.S. holders” (as defined below under “United States Federal Income Tax Consequences—U.S. Holders”) could be required to recognize the entire amount of each installment payment on the amortizing notes, rather than merely the portion of such payment denominated as interest, as income and (ii) payments of principal and interest made to “non-U.S. holders” (as defined below under “United States Federal Income Tax Consequences—Non-U.S. Holders”) on the amortizing notes could be subject to U.S. withholding tax. We have not sought any rulings from the Internal Revenue Service (“IRS”) concerning the treatment of the Units, and no assurance can be given that the IRS or any court will agree with the tax consequences described in “United States Federal Income Tax Consequences.” Prospective investors should consult their tax advisors regarding potential alternative tax characterizations of the Units.

You may be subject to tax upon an adjustment to the settlement rate of the purchase contracts even though you do not receive a corresponding cash distribution.

The fixed settlement rates of the purchase contracts are subject to adjustment in certain circumstances, including the payment of certain cash dividends or upon a fundamental change. If the settlement rates are

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adjusted as a result of a distribution that is taxable to our common stockholders, such as a cash dividend, you generally will be deemed to have received for U.S. federal income tax purposes a taxable dividend without the receipt of any cash. In addition, a failure to adjust (or to adjust adequately) the settlement rates after an event that increases your proportionate interest in us could be treated as a deemed taxable dividend to you. You may also be deemed to have received a taxable dividend in the event we make certain other adjustments to the settlement rates of the purchase contracts. For example, if a fundamental change occurs prior to the maturity date, under some circumstances, we will increase the settlement rate for purchase contracts settled in connection with the fundamental change. Such increase may also be treated as a distribution subject to U.S. federal income tax as a dividend. See “United States Federal Income Tax Consequences.” If you are a “non-U.S. holder” (as defined in “United States Federal Income Tax Consequences—Non-U.S. Holders”), a deemed dividend may be subject to U.S. federal withholding tax (currently at a 30% rate, or such lower rate as may be specified by an applicable income tax treaty), which may be withheld from shares of common stock or sales proceeds subsequently paid or credited to you. It is possible that U.S. withholding tax on deemed dividends would be withheld from any interest or other amounts paid to a non-U.S. holder. See “United States Federal Income Tax Consequences—Non-U.S. Holders— Dividends and Other Distributions with Respect to Our Common Stock and Purchase Contracts.”

Any adverse rating action with respect to the Units may cause their trading price to fall.

We do not intend to seek a rating on the Units. However, if a rating service were to rate the Units and if such rating service were to lower its rating on the Units below the rating initially assigned to the Units or otherwise announces its intention to put the Units on credit watch, the trading price of the Units could decline.

Risks Related to our Common Stock

The market price of our common stock may be volatile and could fall.

The market price of our common stock has experienced, and may continue to experience, significant volatility. Between January 1, 2017 and September 7, 2018, the closing sale price of our common stock on the NYSE has ranged from a low of $115.26 per share to a high of $156.87 per share. Numerous factors, including many over which we have no control, may have a significant impact on the market price of our common stock. These risks include those described or referred to in this “Risk Factors” section and in the other documents incorporated herein by reference as well as, among other things:

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In addition, the stock market experiences extreme price and trading volume fluctuations that have often been unrelated or disproportionate to the operating performance of individual companies. These broad market fluctuations may adversely affect the price of our common stock, regardless of our operating performance. Furthermore, stockholders may initiate securities class action lawsuits if the market price of our stock drops significantly, which may cause us to incur substantial costs and could divert the time and attention of our management. As a result of these factors, among others, the value of your investment may decline because a decrease in the market price of our common stock would likely adversely impact the trading price of the amortizing notes.

Future sales of substantial amounts of our common stock could affect the market price of our common stock.

Future sales of substantial numbers of shares of our common stock, or securities convertible or exchangeable into shares of our common stock, into the public market, future issuances of substantial numbers of additional shares of common stock in connection with any future acquisitions or pursuant to employee benefit plans and future issuances of shares of common stock upon exercise of options or warrants or settlement of the purchase contracts, or perceptions that those sales, issuances and/or exercises or settlements could occur, could adversely affect the prevailing market price of our common stock and our ability to raise capital in the future.

This offering, the concurrent offering of common stock and the issuance of additional stock in connection with acquisitions (including the Merger) or otherwise will dilute all other shareholdings.

Upon the issuance of the Units in this offering and the concurrent offering of shares of common stock, holders of our common stock will incur immediate and substantial net tangible book value dilution on a per share basis. After this offering and the concurrent offering of common stock, we will have an aggregate of approximately 372.3 million (or as few as approximately 371.2 million if the underwriters for the concurrent common stock offering exercise their option) authorized but unissued shares of common stock assuming a public offering price of $127.06 per share, the last reported sale price of our common stock on the NYSE on September 7, 2018 (excluding shares reserved for issuance under our stock compensation plans and under the Units being offered in this offering). Subject to certain volume limitations imposed by the NYSE, we may issue all of these shares without any action or approval by our stockholders, including, without limitation, in connection with acquisitions. Upon the completion of the Merger, in particular, based on the exchange ratio of 0.2490, the estimated number of shares of our common stock issuable as a portion of the Merger consideration is expected to be approximately 14.8 million shares Any shares issued in connection with the activities described in this paragraph, our stock compensation plans or otherwise would dilute the percentage ownership held by holders of our common stock.

Risks Related to Frutarom

In addition to the risks we face, Frutarom also faces the following risks.

Frutarom’s operations are subject to effects of the global economy.

Due to the nature and type of its global activity, Frutarom is exposed to fluctuations in the global economy. Economic crisis and recession in various countries in which Frutarom operates could curb demand for Frutarom’s products and significantly slow down the development and launch of new products by Frutarom customers.

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Frutarom’s operations in emerging markets are subject to political, economic and legal developments that are less predictable than those in developed markets.

Frutarom operates in a number of countries besides the United States and Western Europe, such as Russia, Ukraine, Turkey, Slovenia, Kazakhstan, China, countries in South and Central America (including Brazil, Guatemala, Peru, Chile and Mexico) and countries in northern, southern and western Africa, and is therefore exposed to political, economic and legal developments in these countries which are generally less predictable than in developed countries. Frutarom’s facilities in these countries could be subject to disruption as a result of economic and/or political instability as well as from nationalization and/or expropriation of assets situated there. There is also substantial risk relating to restrictions on Frutarom in collecting payment from its customers, distributors, or agents, as well as foreign exchange restrictions which could impede Frutarom’s ability to realize its profits or to sell its assets in these countries. While none of the emerging market countries in which Frutarom operates impose foreign exchange restrictions that affect Frutarom, such restrictions existed not long ago and there is no assurance that they will not be reinstated in the future.

Fluctuations or devaluations in currencies may negatively affect Frutarom’s results of operations.

Over 70% of Frutarom’s sales in 2017 were conducted in currencies other than the U.S. dollar, mainly the Euro, Russian Ruble, Pound Sterling, Swiss Franc, New Israeli Shekel, Chinese Yuan, Canadian Dollar, Brazilian Real, South African Rand, Peruvian Nuevo Sol and Mexican Peso, and changes in exchange rates affect Frutarom’s reported results in US dollar terms. In addition, in cases of extreme fluctuations in exchange rates, and since a large part of the raw materials used in the manufacture of Frutarom’s products is paid for in U.S. dollars, in Euros, or other currencies, there is no assurance that Frutarom can completely update its selling prices denominated in local currency (which is different from the currency used in buying the raw material) and maintain its margin. Frutarom does not generally undertake external hedging action nor does it use other financial instruments for protection against currency fluctuations. For further information see Frutarom’s audited financial statements included in this prospectus supplement.

Frutarom operates in a highly competitive industry.

Frutarom faces competition from large multinationals as well as medium-sized, small and local companies across the sectors in which it operates. Some of Frutarom’s competitors have greater financial and technological resources, larger sales and marketing platforms and more established reputation, and may therefore be better equipped to adapt to changes and industry trends.

The global market for flavors is characterized by close relations between flavor manufacturers and their customers, particularly with regard to large multinationals. Furthermore, many large multinational customers, along with increasing numbers of medium-sized customers in recent years, sometimes limit the number of their suppliers and work predominantly with a list of “approved suppliers.” To compete more effectively under these conditions, Frutarom must invest more resources in customer relations, in R&D and in matching products to customers’ needs in order to provide high quality and efficient service. Any failure to maintain good relations with its customers, forge strong relations with new customers, or secure the status of “approved supplier” with some of its customers could lead to substantial adverse effects on Frutarom’s business, operating results and financial condition.

The specialty fine ingredients market is more price sensitive than the flavors market and is characterized by relatively lower profit margins. Some fine ingredients products manufactured by Frutarom are less unique and more replaceable by competitors’ products. Production overcapacity for fine ingredients globally could also negatively impact Frutarom’s sales and profitability. Although as part of its strategy Frutarom focuses on specialty fine ingredients with higher profit margins, there is no assurance that operating margins will not erode in the future, which could substantially impact Frutarom’s business, operating results and financial condition.

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Increased environmental, health and safety regulations or the loss of necessary environmental permits could adversely affect Frutarom’s operating results and financial condition.

Frutarom is subject to a variety of international and domestic health, safety and environmental statutes in the various countries in which it operates. In general, there is a trend towards increased regulation in the fields of Frutarom’s activities. This trend stems from, among other things, growing consumer sensitivity concerning the inclusion of flavor additives in food products and the fact that regulators perceive nutraceuticals, medical food and functional food products as having medicinal attributes. In some countries such products may be subjected to the same standards and regulations as applied to drugs or targeted regulation for these categories. In addition, regulators in different countries can change regulations applying to infant nutrition or clinical nutrition for the elderly in a way that might affect Frutarom’s sales in these categories. Frutarom has identified the markets for nutraceuticals, functional food, specialty fine ingredients for infant nutrition, especially infant formulas, and clinical nutrition for the elderly as important to its future growth. The subjecting of these markets to increased regulation could give rise to additional expenses which might have an adverse effect on Frutarom’s business, operating results and financial condition.

Companies such as Frutarom that operate in the flavor and fine ingredients industry make use of, manufacture, sell, and distribute substances that are sometimes considered hazardous and are therefore subject to extensive regulation concerning the storage, handling, manufacture, transport, use and disposal of such substances and their components and byproducts. Frutarom’s production and R&D activities in the various countries where it operates are subject to various regulations and standards relating to air emissions, sewage treatment and the use, handling and discharge of hazardous material as well as clean-up of existing environmental contamination. Any further tightening of such laws and regulations could have a substantial adverse effect on Frutarom’s business, operating results and financial condition.

In addition to covering its ongoing environmental compliance costs, Frutarom might also incur nonrecurring charges associated with remedial action needed to be taken at its production sites. As environment-related incidents cannot be foreseen with any certainty, the sums that Frutarom allocates or will allocate for such matters may turn out to be inadequate. Ongoing and nonrecurring environment-related expenses could each have a substantial adverse effect on Frutarom’s business, operating results and financial condition.

Frutarom is required to obtain various environmental permits concerning operations at its various production facilities and to meet the conditions set by these permits. The expansion of existing plants is also subject to securing necessary permits. Such permits might be unilaterally revoked or modified by the issuer, or might be for a limited amount of time. Any cancellation, modification and/or failure to renew or obtain a permit could have a significant adverse effect on Frutarom’s business, operating results and financial condition.

Failure to comply with environmental, health and safety laws and regulations may expose Frutarom to civil and criminal liability.

The laws and regulations concerning the environment, health and safety may subject Frutarom to civil and/or criminal liability for non-compliance or environmental pollution. Environmental, health and safety laws may include criminal sanctions (including substantial penalties) for violating them. Some environmental laws also include provisions imposing complete responsibility for the release of hazardous substances into the environment which could result in Frutarom becoming liable for clean-up efforts without any negligence or fault on its part. Other environmental laws impose liability jointly and severally, which could expose Frutarom to responsibility for cleaning up environmental pollution caused by others.

In addition, some environmental, health and safety laws are applied retroactively and could impose responsibility for acts done in the past even if such acts were carried out in accordance with the relevant legal provisions in force at the time. Criminal or civil liability under such laws may have significant adverse effects on Frutarom’s business, operating results and financial condition.

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Frutarom may also become subjected to claims for personal injury or property damage arising from exposure to hazardous substances. Laws in the major countries where Frutarom operates permit legal proceedings to be instituted against it if personal injury or environmental contamination was ostensibly caused by activity at its production sites in these countries. Such legal proceedings could also be instituted by private individuals or non-governmental organizations.

Fluctuations in prices of raw materials needed for producing Frutarom’s products may negatively impact its results of operations.

The price, quality and availability of the main raw materials that Frutarom uses, especially in the field of natural products, are subject to fluctuations arising from global supply and demand. Many raw materials used by Frutarom are agricultural products whose prices, quality and availability could be affected by, among other things, poor weather conditions. Frutarom does not normally conduct futures transactions in raw materials and is exposed to price fluctuations in the raw materials it uses according to changes in global trends for prices of these raw materials. In recent periods, there has been a rise in the prices of a number of principal raw materials used by Frutarom, and such trends may have a significant adverse effect on Frutarom’s business, operating results and financial condition.

The inability to obtain raw materials due to the loss of third party suppliers or unavailability of raw materials could impair Frutarom’s sales and adversely affect its operating results.

Frutarom is dependent on third parties for the supply of raw materials needed for manufacturing its products. Although Frutarom purchases raw materials from a very wide range of suppliers and no individual supplier accounted for more than 3% of its total raw material usage in 2017, and even though there is more than one supplier for most of the raw materials bought by Frutarom and they are usually readily available, there is no assurance that this will also continue to be the case in the future. Severe weather conditions may cause a significant shortage of natural raw materials used by Frutarom. A shortage of these raw materials could impair Frutarom’s sales for a certain period of time and adversely affect its operating results.

Product liability claims against Frutarom and potential damages under those claims could have significant adverse effects on Frutarom’s business, operating results and financial condition.

Frutarom is exposed to product liability risk, particularly due to the fact that it supplies flavors to the food and beverage, flavor and fragrance, functional food, pharma/nutraceutical and personal care industries. Should Frutarom be found responsible in a large claim of this type, its insurance coverage might be inadequate to cover damages and/or legal expenses. A lack of adequate insurance coverage could result in a significant adverse effect on Frutarom’s business, operating results and financial condition. Product liability claims brought against Frutarom could damage its reputation as well as put heavy demand on management’s time and efforts, and this could have significant adverse effects on Frutarom’s business regardless of the outcome of the claim.

The inability to integrate the businesses acquired by Frutarom during its recent growth period may lead to disruptions in its business and failure to capitalize on anticipated synergies.

A key element of Frutarom’s growth strategy has been growth through the acquisition of flavor and specialty fine ingredients manufacturers. In line with this strategy, Frutarom has made many strategic acquisitions of companies and business activities in recent years. The integration of acquired activities involves a number of risks, including possible adverse effects on Frutarom’s operating results, the loss of customers, the consuming of senior management’s time and attention, and the failure to retain key personnel including managers of the acquired activities, along with risks associated with unanticipated events in the integration of the operations, technologies, systems and services of the acquired business. In addition, Frutarom may be unable to capitalize on the anticipated synergies (including those aimed at cost savings) inherent in such acquisitions. Failure in successfully integrating its acquisitions could have adverse effects on Frutarom’s business, operating results and financial condition.

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The rapid growth, as in recent years, in both Frutarom’s activities and its geographical spread requires effective management to ensure that the financial benefits, tapping of synergies and the economies of scale are achieved. An inability to adapt to the rapid growth could result in losses or acquisition costs that will not be recovered as quickly as anticipated, if at all. Such circumstances could have significant adverse effects on Frutarom’s business, its operating results and financial condition.

The loss of skilled personnel, members of senior management or other key employees could negatively impact Frutarom’s ability to compete and implement its strategy.

Frutarom’s continued future success depends on its ability to attract and retain proficient flavorists (flavor developers), lab technicians and other skilled personnel. Frutarom operates in a highly specialized market where product quality is of critical importance and having skilled personnel is necessary for ensuring the supply of high quality products. If a number of such employees were to leave at the same time, Frutarom could encounter difficulties in finding replacements with equivalent experience and abilities, a situation which could impair Frutarom’s R&D capabilities. Furthermore, Frutarom’s continued success depends to a large extent on its senior management team. The loss of services from members of senior management or other key employees could have a negative impact on Frutarom’s results and its ability to implement its strategy. A failure to recruit and retain skilled personnel or members of senior management could have a significant adverse effect on Frutarom’s business, operating results and financial condition.

The inability to protect its intellectual property or the loss of exclusive use of its proprietary formulas to create flavors may have a significant adverse impact on Frutarom’s business, operating results and financial condition.

Frutarom’s business relies on intellectual property, mainly consisting of formulas used to create its flavors. Frutarom does not register these formulas but they are kept highly confidential and considered trade secrets and, as such, are accessible to just a very limited circle of people within Frutarom. Although Frutarom believes it is not significantly reliant on any individual intellectual property right, proprietary formula, patent or license, a breach of confidentiality with respect to the formulas or loss of access to them and/or the future expiration of intellectual property rights could have a significant adverse impact on Frutarom’s business, operating results and financial condition.

Frutarom relies, in part, on confidentiality agreements, ownership of intellectual property, and non-competition agreements with employees, vendors and third parties in order to protect its intellectual property. It is possible that these agreements will be breached and that Frutarom may lack an adequate remedy for any such breach. Disputes may arise concerning the ownership of intellectual property or the extent to which the confidentiality agreements remain in force. Furthermore, Frutarom’s trade secrets may become revealed to its competitors or developed independently by them, in which case Frutarom will not be able to enjoy exclusive use of some of its formulas or maintain confidentiality concerning its products.

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FORWARD-LOOKING STATEMENTS

Statements in this prospectus supplement and the documents incorporated by reference, which are not historical facts or information, are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are based on management’s current assumptions, estimates and expectations and include statements concerning (i) our ability to achieve long-term sustainable growth and increase shareholder value, (ii) growth potential in the emerging markets, (iii) the anticipated impact of our acquisitions on our market position within key markets, (iv) our competitive position in the market and expected financial results in 2018, (v) expected savings from profit improvement initiatives, (vi) expected capital expenditures and cost pressures in 2018, (vii) the impact of the Tax Cuts and Jobs Act (the “Tax Act”) on the Company’s effective tax rate in 2018, (viii) the expected level of share repurchases under the Company’s share repurchase program, (ix) our ability to innovate and execute on specific consumer trends and demands, (x) timing of completion or relocation of our plants in China, (xi) expected increases in raw material costs in 2018, (xii) the impact of operational performance, cost reduction efforts and mix enhancement on margin improvement, and (xiii) the amount of expected pension contributions in 2018. These forward-looking statements should be evaluated with consideration given to the many risks and uncertainties inherent in our business that could cause actual results and events to differ materially from those in the forward-looking statements. Certain of such forward-looking information may be identified by such terms as “expect,” “anticipate,” “believe,” “intend,” “outlook,” “may,” “estimate,” “should,” and “predict” and similar terms or variations thereof. Such forward-looking statements are based on a series of expectations, assumptions, estimates and projections about the Company, are not guarantees of future results or performance, and involve significant risks, uncertainties and other factors, including assumptions and projections, for all forward periods. Our actual results may differ materially from any future results expressed or implied by such forward-looking statements. Such factors include, among others, those discussed in the “Risk Factors” section of this prospectus supplement and the following:

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The foregoing list of important factors does not include all such factors, nor necessarily present them in order of importance. In addition, you should consult other disclosures made by the Company (such as in our other filings with the SEC or in company press releases) for other factors that may cause actual results to differ materially from those projected by the Company. For additional information regarding factors that could affect the Company’s results of operations, financial condition and liquidity, see “Risk Factors” in this prospectus supplement and the accompanying prospectus, as well as the risks described in the “Risk Factors” section of the Company’s most recent Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q and as may be included from time to time in our reports filed with the SEC.

The Company intends its forward-looking statements to speak only as of the time of such statements and does not undertake or plan to update or revise them as more information becomes available or to reflect changes in expectations, assumptions or results. The Company can give no assurance that such expectations or forward-looking statements will prove to be correct. An occurrence of, or any material adverse change in, one or

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more of the risk factors or risks and uncertainties referred to in this prospectus supplement and the accompanying prospectus, or included in any of our periodic reports filed with the SEC and incorporated by reference into this prospectus supplement could materially and adversely impact our results of operations, financial condition and liquidity and our future financial results.

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USE OF PROCEEDS

We estimate that the net proceeds to us from this Units offering, after deducting underwriting discounts and estimated offering expenses payable by us, will be approximately $726 million (or up to approximately $799 million if the underwriters exercise their option to purchase additional Units). We intend to use the net proceeds from this offering, together with the net proceeds from the concurrent common stock offering, the Debt Financings and cash on hand to finance the Merger and to pay related fees and expenses. If for any reason the Merger is not consummated, we intend to use the net proceeds from this offering, after payment of any cash redemption amount and/or repurchase price, for general corporate purposes. See “Summary—Recent Developments.”

Completion of this Units offering is not contingent on completion of the concurrent common stock offering, the Debt Financings or the Merger. The concurrent common stock offering, the Debt Financings and the Merger are not contingent on the completion of this Units offering. However, if the closing of the Merger has not occurred on or prior to February 7, 2019, or if, prior to such date, the Merger Agreement is terminated, we may elect to redeem all, but not less than all, of the outstanding purchase contracts on the terms described under “Description of the Purchase Contracts—Merger Termination Redemption”. If we elect to exercise our merger termination redemption option, then holders of the amortizing notes will have the right to require us to repurchase some or all of their amortizing notes on the terms described under “Description of the Amortizing Notes—Repurchase of Amortizing Notes at the Option of the Holder”.

The following table outlines the sources and uses of funds for the Merger, assuming the underwriters do not exercise their respective options to purchase additional Units in this offering and additional shares of our common stock in the concurrent common stock offering. The table assumes that the Merger, this Units offering, the concurrent common stock offering and the Debt Financings are completed simultaneously, but this Units offering, the concurrent common stock offering and the Debt Financings are expected to occur before completion of the Merger. Amounts in the table are in millions of dollars and are estimated, and actual amounts may vary from the estimated amounts.

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CAPITALIZATION

The following sets forth our capitalization on a consolidated basis as of June 30, 2018:

This table should be read in conjunction with the other sections of this prospectus supplement and our consolidated financial statements and related notes incorporated by reference in this prospectus supplement and the accompanying prospectus. See “Incorporation of Certain Information by Reference” in this prospectus supplement. In addition, investors should not place undue reliance on the as adjusted, as further adjusted or pro forma as further adjusted information included below because this offering is not contingent upon completion of any of the transactions reflected in the adjustments below.

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PRICE RANGE OF COMMON STOCK AND DIVIDENDS

Shares of our common stock are traded on the NYSE and Euronext Paris under the symbol “IFF.”

On September 7, 2018, the closing price of our common stock on the NYSE was $127.06 per share. As of September 6, 2018, we had approximately 1,668 shareholders of record holding shares of our common stock.

Although we have paid dividends in the past, all future declarations of dividends are subject to the final determination of our board of directors, in its discretion, based on a number of factors that it deems relevant, including our financial position, results of operations, available cash resources, cash requirements, applicable law and alternative uses of cash that our board of directors may conclude would be in the best interest of the IFF and our shareholders.

The table below shows the high and low closing prices for our common stock, and the cash dividends we paid per share for the quarterly periods indicated.

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UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION

On May 7, 2018, IFF, Frutarom and Merger Sub entered into a merger agreement that provides for the acquisition of Frutarom by IFF. Subject to the satisfaction or waiver of certain other closing conditions, IFF will acquire Frutarom through the merger of Merger Sub with and into Frutarom, with Frutarom surviving the merger and becoming a wholly owned subsidiary of IFF.

The following unaudited pro forma condensed combined financial information is presented to illustrate the estimated effects of the merger and certain other adjustments listed below.

The unaudited pro forma condensed combined balance sheet as of June 30, 2018, and the unaudited pro forma condensed combined statements of operations for the six months ended June 30, 2018 and the year ended December 31, 2017, respectively, are presented herein. The unaudited pro forma condensed combined balance sheet combines the unaudited consolidated balance sheets of IFF and Frutarom as of June 30, 2018, and gives effect to the merger as if it occurred on June 30, 2018. The unaudited pro forma condensed combined statements of operations combine the historical results of IFF and Frutarom for the six months ended June 30, 2018, and the year ended December 31, 2017, and give effect to the merger as if it occurred on January 1, 2017. The historical financial information has been adjusted to give effect to pro forma adjustments that are (i) directly attributable to the merger, (ii) factually supportable, and (iii) with respect to the unaudited condensed combined statements of operations, expected to have a continuing impact on the combined entity’s condensed results.

The merger of IFF and Frutarom will be accounted for using the acquisition method of accounting as per the provisions of Accounting Standards Codification 805, “Business Combinations”, which we refer to as ASC 805, with IFF representing the accounting acquirer under this guidance. The unaudited pro forma condensed combined financial statements were prepared in accordance with Article 11 of Regulation S-X and primarily give effect to the merger adjustments, which include:

The pro forma adjustments included in this document are subject to modification based on changes in interest rates, changes in share prices, the final determination of the fair value of the assets acquired and liabilities assumed, additional analysis, and additional information that may become available, which may cause the final adjustments to be materially different from the pro forma condensed combined financial statements presented below. Following the consummation of the merger, IFF management will perform a detailed review of Frutarom’s accounting policies in an effort to determine if differences in accounting policies require further reclassification of Frutarom’s results of operations or reclassification of assets or liabilities to conform to IFF’s accounting policies and classification. As a result, IFF may subsequently identify additional material differences in the accounting policies which could have a material impact on the unaudited pro forma combined financial information.

The unaudited pro forma condensed combined financial information presented is for informational purposes only and is not necessarily indicative of the financial position or results of operations that would have been

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realized if the merger had been completed on the dates set forth above, nor is it indicative of future results or financial position of the combined company. Additionally, the final determination of the purchase price and the purchase price allocation, upon the completion of the merger, will be based on Frutarom’s net assets acquired as of that date and will depend on a number of factors that cannot be predicted with certainty at this time. The unaudited pro forma condensed combined financial information does not reflect any anticipated synergies or dis-synergies, operating efficiencies or cost savings that may result from the merger or potential divestitures that may occur prior to, or subsequent to, the completion of the merger or any acquisition and integration costs that may be incurred. The pro forma adjustments, which IFF believes are reasonable under the circumstances, are preliminary and are based upon available information and certain assumptions described in the accompanying notes to the unaudited pro forma condensed combined financial information. Actual results and valuations may differ materially from the assumptions within the accompanying unaudited pro forma condensed combined financial information. Any changes to IFF’s stock price, from September 5, 2018 through the date the merger is completed, will also change the purchase price, which may include the recording of a lower or higher amount of goodwill. The final adjustments may be materially different from the pro forma condensed combined financial statements presented in this document.

The unaudited pro forma condensed combined financial information should be read in conjunction with the notes to the unaudited pro forma condensed combined financial information, Frutarom’s audited financial statements for the year ended December 31, 2017 and Frutarom’s unaudited quarterly financial statements for the quarterly period ended June 30, 2018, as well as IFF’s consolidated financial statements and related notes thereto contained in its Annual Report on Form 10-K for the year ended December 31, 2017 and IFF’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2018.

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Unaudited Pro Forma Condensed Combined Balance Sheet

As of June 30, 2018

See the accompanying “Notes to the Unaudited Pro Forma Condensed Combined Financial Information”, which are an integral part hereof. The pro forma adjustments are explained in the notes below.

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Unaudited Pro Forma Condensed Combined Statement of Operations

For the Six Months Ended June 30, 2018