UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. 9) Surmodics, Inc. -------------------------------------------------------------------------------- (Name of Issuer) Common Stock, $.05 par value -------------------------------------------------------------------------------- (Title of Class of Securities) 867773 10 0 -------------------------------------------------------------------------------- (CUSIP Number) December 31, 2007 -------------------------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: |_| Rule 13d-1(b) |_| Rule 13d-1(c) |X| Rule 13d-1(d) Page 2 of 4 CUSIP NO. 868873 10 0 -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON I.R.S. IDENTIFICATION NOS. OF ABOVE PERSON (ENTITIES ONLY). David A. Koch -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |_| (b) |_| -------------------------------------------------------------------------------- 3 SEC USE ONLY -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION USA -------------------------------------------------------------------------------- 5 SOLE VOTING POWER 839,583 (includes 24,000 shares which may be purchased upon the exercise of options) ----------------------------------------------------------------- NUMBER OF 6 SHARED VOTING POWER SHARES BENEFICIALLY 125,000 OWNED BY ----------------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING PERSON 839,583 (includes 24,000 shares which may be purchased upon the exercise of options) WITH: ----------------------------------------------------------------- 8 SHARED DISPOSITIVE POWER 125,000 -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 964,583 (includes 24,000 shares which may be purchased upon the exercise of options) -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) |_| -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.28% -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- Page 3 of 4 Item 1(a). Name of issuer: Surmodics, Inc. Item 1(b). Address of issuer's principal executive offices: 9924 West 74th Street Eden Prairie, MN 55344-3523 Item 2(a). Names of person filing: David A. Koch Item 2(b). Address of principal business office: 505 N Highway 169 Suite 595 Plymouth, MN 55441 Item 2(c). Citizenship: USA Item 2(d). Title of class of securities: Common Stock, $.05 par value Item 2(e). CUSIP No.: 868873 10 0 Item 3. If this statement is filed pursuant to Secs. 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: Not applicable Item 4. Ownership (a) Amount beneficially owned: 964,583 (includes 24,000 shares which may be purchased upon the exercise of options) (b) Percent of class: 5.28% (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: 839,583 (incudes 24,000 shares which may be purchased upon exercise of options) (ii) Shared power to vote or to direct the vote: 125,000 (iii) Sole power to dispose or to direct the disposition of: 839,583 (incudes 24,000 shares which may be purchased upon exercise of options) (iv) Shared power to dispose or to direct the disposition of: 125,000 Item 5. Ownership of 5 percent or Less of a Class: Not applicable. Item 6. Ownership of More than 5 Percent on Behalf of Another Person: Not applicable. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person: Not applicable. Item 8. Identification and Classification of Members of the Group: Not applicable. Item 9. Notice of Dissolution of Group: Not applicable. Item 10. Certifications Not applicable. Page 4 of 4 Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: March 12, 2008 /s/ David A. Koch ------------------------------------- Signature David A. Koch ------------------------------------- Name/Title