1.

Name of Reporting Person.
I.R.S. Identification No. of Above Person (Entities Only).

ING Groep N.V.

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

☐

(b)

☐

3.

SEC Use Only

4.

Citizenship or Place of Organization

The Netherlands

5.

Sole Voting Power

0

6.

Shared Voting Power

3,126,299 (1)

7.

Sole Dispositive Power

0

8.

Shared Dispositive Power

3,126,299 (1)

9.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,126,299 (1)

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11.

Percent of Class Represented by Amount in Row (9)

6.70% (2)

12.

Type of Reporting Person (See Instructions)

HC

(1) 3,126,299 shares of Class A Common Stock, are held by ING Bank N.V., a direct wholly-owned subsidiary of ING Groep N.V., and ING Groep N.V. may be deemed the beneficial owner of the 3,126,299 shares of Class A Common Stock.

 

(2) Based on 46,636,924 shares of Class A Common Stock issued and outstanding as of October 26, 2017, as reported by the issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 1, 2017.

1.

Name of Reporting Person.
I.R.S. Identification No. of Above Person (Entities Only).

ING Bank N.V.

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

☐

(b)

☐

3.

SEC Use Only

4.

Citizenship or Place of Organization

The Netherlands

5.

Sole Voting Power

0

6.

Shared Voting Power

3,126,299 (1)

7.

Sole Dispositive Power

0

8.

Shared Dispositive Power

3,126,299 (1)

9.

Aggregate Amount Beneficially Owned by Each Reporting Person

3,126,299 (1)

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ☐

11.

Percent of Class Represented by Amount in Row (9)

6.70% (2)

12.

Type of Reporting Person (See Instructions)

CO

Item 1(a).

Name of Issuer:

Sucampo Pharmaceuticals, Inc.

Item 1(b).

Address of Issuer’s Principal Executive Offices:

805 King Farm Boulevard, Suite 550

Rockville, MD 20850

Item 2(a).

Name of Person Filing:

ING Groep N.V.

ING Bank N.V.

Item 2(b).

Address of Principal Business Office or, if none, Residence:

ING Groep N.V.

Bijlmerplein 888

1102 MG

Amsterdam-Zuidoost

Postbus 1800

1000 BV Amsterdam

The Netherlands

 

ING Bank N.V.

Bijlmerplein 888

1102 MG

Amsterdam-Zuidoost

Postbus 1800

1000 BV Amsterdam

The Netherlands

Item 2(c).

Citizenship:

ING Groep N.V. – The Netherlands

ING Bank N.V. – The Netherlands

Item 2(d).

Title of Class of Securities:

Class A Common Stock

Item 2(e).

CUSIP Number:

864909106

Item 3.

If This Statement is Filed Pursuant to Rule 13d-1(b), 13d-2(b) or (c), Check Whether the Person Filing is a:

(a) ☐ Broker or dealer registered under Section 15 of the Exchange Act.

(b) ☐ Bank as defined in Section 3(a)(6) of the Exchange Act.

(c) ☐ Insurance company as defined in Section 3(a)(19) of the Exchange Act.

(d) ☐ Investment company as defined under Section 8 of the Investment Company Act.

(e) ☐ An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E).

(f) ☐ An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F).

(g) ☐ A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G).

(h) ☐ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act.

(i) ☐ A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act.

(j) ☐ Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Not Applicable

Item 4.

Ownership:

(a)

ING Groep N.V. may be deemed to be the beneficial owner of 3,126,299 shares of Class A Common Stock, held by ING Bank N.V., a direct wholly-owned subsidiary. ING Bank N.V. may be deemed the beneficial owner of 3,126,299 shares of Class A Common Stock.

(b)

ING Groep N.V. and ING Bank N.V., a direct wholly-owned subsidiary of ING Groep N.V., may be deemed to be the beneficial owner of 6.70% of Class A Common Stock based on 46,636,924 shares of Class A Common Stock issued and outstanding as of October 26, 2017, as reported by the issuer in its Quarterly Report on Form 10-Q, as filed with the Securities and Exchange Commission on November 1, 2017.

(c)

Each of ING Groep N.V. and ING Bank N.V. have the shared power to vote and direct the disposition of the 3,126,299 shares of Class A Common Stock, held by ING Bank N.V.

Item 5.

Ownership of Five Percent or Less of a Class:

Not Applicable.

Item 6.

Ownership of More than Five 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.

Certification.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

ING GROEP N.V.

By:

/s/ Fred Severin

Fred Severin

Compliance Officer

By:

/s/ M.A. van der Ploeg

M.A. van der Ploeg

Head of Data and CoEA

ING BANK N.V.

By:

/s/ Fred Severin

Fred Severin

Compliance Officer

By:

/s/ M.A. van der Ploeg

M.A. van der Ploeg

Head of Data and CoEA

ING GROEP N.V.

By:

Fred Severin

Compliance Officer

By:

M.A. van der Ploeg

Head of Data and CoEA

ING BANK N.V.

By:

Fred Severin 

Compliance Officer

By:

M.A. van der Ploeg

Head of Data and CoEA