DoubleDown Interactive: Boston Partners stake at 0.53%

The amendment recalculates earlier ownership percentages using Common Shares rather than comparing ADS counts directly with Common Shares outstanding.

Available on EDGAR 11/06/2026 - 05:07 PM EST Accepted by SEC EDGAR 11/06/2026 - 05:07 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Boston Partners amended its ownership report concerning DoubleDown Interactive Co., Ltd. (DDI), reporting 13,090.30 Common Shares beneficially owned, or 0.53%, as of September 30, 2026. Boston Partners says it corrected earlier reports to express its ADS holdings in Common Shares: 6,685.95 Common Shares (0.27%) as of March 31, 2026, and 8,252.55 Common Shares (0.33%) as of June 30, 2026. Each 20 ADSs represents one Common Share; 2,477,672 Common Shares were outstanding as of December 31, 2025.

Key Figures

Common Shares beneficially owned: 13,090.30 Common Shares Percent of class: 0.53% ADSs held: 261,806 ADSs +4 more

7 metrics

Common Shares beneficially owned 13,090.30 Common Shares As of September 30, 2026

Percent of class 0.53% As of September 30, 2026

ADSs held 261,806 ADSs As of September 30, 2026

Corrected March 31, 2026 ownership 6,685.95 Common Shares; 0.27% As of March 31, 2026

Corrected June 30, 2026 ownership 8,252.55 Common Shares; 0.33% As of June 30, 2026

Common Shares outstanding 2,477,672 Common Shares As of December 31, 2025

ADS-to-Common-Share ratio 20 ADSs for one Common Share Ratio stated in the ownership report

Key Terms

beneficially owned, Sole Voting Power, Shared Voting Power, Sole Dispositive Power, +1 more

5 terms

beneficially owned regulatory

"Amount beneficially owned: 13,090.3"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power regulatory

"Sole Voting Power 13,090.30"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Shared Voting Power regulatory

"Shared Voting Power 0.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

Sole Dispositive Power regulatory

"Sole Dispositive Power 13,090.30"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

American Depositary Shares financial

"American Depositary Shares, each twenty (20) ADSs representing one (1) Common Share"

American depositary shares (ADSs) are a way for investors in the United States to buy shares of foreign companies without dealing with international markets directly. They represent ownership in a foreign company's stock and are traded on U.S. stock exchanges, making it easier for American investors to buy, sell, and own parts of companies from around the world.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many DDI shares did Boston Partners report owning?

Boston Partners reported beneficial ownership of 13,090.30 Common Shares, or 0.53%, as of September 30, 2026. Its stated position was 261,806 ADSs, with each 20 ADSs representing one Common Share.

Why did Boston Partners correct its DDI ownership percentages?

Boston Partners said earlier reports stated its holdings in ADSs but calculated percentages by dividing ADSs by Common Shares outstanding. The amendment expresses the holdings in Common Shares, using the stated ratio of 20 ADSs for one Common Share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

DoubleDown Interactive Co., Ltd.

(Name of Issuer)

American Depositary Shares, each twenty (20) ADSs representing one (1) Common Share

(Title of Class of Securities)

25862B109

(CUSIP Number)

09/30/2026

(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)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 25862B109

1

Names of Reporting Persons

Boston Partners

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 13,090.30
6	Shared Voting Power 0.00
7	Sole Dispositive Power 13,090.30
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,090.30

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)

0.53 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: Boston Partners' amounts and percentages are stated in Common Shares. Per the issuer's Form 20-F for the fiscal year ended December 31, 2025, each twenty (20) American Depositary Shares ("ADSs") represent one (1) Common Share, and 2,477,672 Common Shares were outstanding as of December 31, 2025. As of 09/30/2026, Boston Partners held 261,806 ADSs / 20 = 13,090.30 Common Shares; 13,090.30 / 2,477,672 = 0.53%. This amendment also corrects prior filings, which stated holdings in ADSs and calculated the percentage by dividing ADSs by Common Shares outstanding. Corrected on a consistent basis: as of 03/31/2026, Boston Partners held 133,719 ADSs / 20 = 6,685.95 Common Shares; 6,685.95 / 2,477,672 = 0.27% (previously reported as 5.40%); as of 06/30/2026, Boston Partners held 165,051 ADSs / 20 = 8,252.55 Common Shares; 8,252.55 / 2,477,672 = 0.33% (previously reported as 6.66%).

SCHEDULE 13G

Item 1.
(a)	Name of issuer: DoubleDown Interactive Co., Ltd.
(b)	Address of issuer's principal executive offices: 13F, GANGNAM FINANCE CENTER, 152, TEHERAN-RO GANGNAM-GU, SEOUL, KOREA, REPUBLIC OF unknown
Item 2.
(a)	Name of person filing: Boston Partners
(b)	Address or principal business office or, if none, residence: ONE BEACON STREET 30TH FLOOR BOSTON, Massachusetts 02108
(c)	Citizenship: Boston Partners - DELAWARE
(d)	Title of class of securities: American Depositary Shares, each twenty (20) ADSs representing one (1) Common Share
(e)	CUSIP No.: 25862B109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(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 associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 13,090.3
(b)	Percent of class: 0.53 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Boston Partners - 13,090.3
	(ii) Shared power to vote or to direct the vote: Boston Partners - 0
	(iii) Sole power to dispose or to direct the disposition of: Boston Partners - 13,090.3
	(iv) Shared power to dispose or to direct the disposition of: Boston Partners - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
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:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Boston Partners

Signature:	/s/ Ali Farooqi
Name/Title:	Ali Farooqi / Senior Compliance Manager
Date:	11/06/2026