Boston Partners discloses 6.66% DoubleDown ADS stake

Boston Partners reports beneficial ownership of DoubleDown Interactive Co., Ltd. American Depositary Shares.

Rhea-AI Filing Summary

Boston Partners reports beneficial ownership of DoubleDown Interactive Co., Ltd. American Depositary Shares. Boston Partners holds 165,051 ADSs, representing 6.66% of this class as of June 30, 2026, with sole voting and dispositive power over all such securities.

Each ADS represents 0.05 common shares, so these ADSs correspond to 8,252.55 common shares of DoubleDown Interactive. The position is held in discretionary accounts for certain clients, and Boston Partners may be deemed a beneficial owner under Rule 13d-3.

Key Figures

ADS beneficially owned: 165,051 ADSs Percent of ADS class: 6.66% Equivalent common shares: 8,252.55 shares +3 more

6 metrics

ADS beneficially owned 165,051 ADSs American Depositary Shares of DoubleDown Interactive held by Boston Partners as of 06/30/2026

Percent of ADS class 6.66% Percentage of DoubleDown Interactive American Depositary Shares class held by Boston Partners

Equivalent common shares 8,252.55 shares Common shares represented by 165,051 ADSs at 20 ADSs per 1 common share

ADS-to-common ratio 20 ADS = 1 common share Each ADS is equivalent to 0.05 common shares of DoubleDown Interactive

Sole voting power 165,051 ADSs ADSs over which Boston Partners has sole power to vote or direct the vote

Sole dispositive power 165,051 ADSs ADSs over which Boston Partners has sole power to dispose or direct the disposition

Key Terms

American Depository Shares, Schedule 13G, beneficial owner, Rule 13d-3, +1 more

5 terms

American Depository Shares financial

"Title of class of securities: American Depository Shares"

American depository shares are U.S.-listed securities that stand in for a foreign company’s ordinary shares, held by a U.S. bank which issues the ADS so investors can trade the foreign stock in U.S. dollars and on U.S. exchanges. Think of them like a locally wrapped version of a foreign product—easier to buy and sell at home—but they still carry risks from currency differences, foreign rules and potential limits on voting rights, so they affect access, liquidity and investment risk.

Schedule 13G regulatory

"This Schedule is being filed with respect to 165,051 shares"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficial owner regulatory

"Boston Partners may be deemed to be a beneficial owner of such Common Stock"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

Rule 13d-3 regulatory

"By reason of rule 13d-3 under the act Boston Partners may be deemed"

Rule 13d-3 defines who is treated as the beneficial owner of a company’s shares for U.S. securities disclosure rules — essentially anyone who has the power to vote or direct how shares are voted, or the power to buy or sell them, even if they don’t hold the certificates. For investors this matters because crossing certain ownership thresholds triggers public filing and disclosure obligations and signals potential control or influence, much like having the keys to a car implies you can drive it even if it’s registered to someone else.

discretionary account financial

"held by Boston Partners on 06/30/2026 for the discretionary account of certain clients"

An account in which the account holder gives a broker or advisor authority to buy and sell securities on their behalf without asking for permission for each trade. Like handing someone the keys to your car to run errands, it lets a professional act quickly and make ongoing decisions for you; this matters to investors because it changes who controls trade timing, affects fees and tax reporting, and shifts responsibility for execution and record-keeping.

FAQ

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

What stake in DoubleDown Interactive (DDI) does Boston Partners report in this Schedule 13G/A?

Boston Partners reports beneficial ownership of 165,051 American Depositary Shares of DoubleDown Interactive, representing 6.66% of the ADS class as of June 30, 2026, with sole voting and dispositive power over the position.

How many common shares of DDI do Boston Partners’ ADS holdings represent?

Boston Partners’ 165,051 ADSs represent 8,252.55 common shares of DoubleDown Interactive. Each ADS is equivalent to 0.05 common shares, or 20 ADSs per one common share, based on the company’s disclosure.

Does Boston Partners share voting or dispositive power over its DDI ADS holdings?

No. Boston Partners reports sole voting power over 165,051 ADSs and sole dispositive power over 165,051 ADSs, with no shared voting or dispositive power over DoubleDown Interactive American Depositary Shares.

On whose behalf does Boston Partners hold DoubleDown Interactive (DDI) ADSs?

Boston Partners holds 165,051 DoubleDown Interactive ADSs in discretionary accounts of certain clients. Under Rule 13d-3, Boston Partners may be deemed a beneficial owner of the underlying common stock represented by these ADSs.

Does any other person hold more than 5% of DDI ADSs through Boston Partners’ accounts?

According to Boston Partners, no person has the right to receive, or direct the receipt of, dividends or sale proceeds from the DoubleDown Interactive ADS position that represents more than 5% of the outstanding ADS class.

What is the ADS-to-common-share ratio for DoubleDown Interactive (DDI)?

Each DoubleDown Interactive American Depositary Share represents 0.05 common shares, or 20 ADSs for one common share. This ratio is used to derive the underlying 8,252.55 common shares from Boston Partners’ 165,051 ADS holdings.

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

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Available on EDGAR 08/04/2026 - 04:58 PM Accepted by SEC EDGAR 08/04/2026 - 04:57 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

DoubleDown Interactive Co., Ltd.

(Name of Issuer)

American Depository Shares

(Title of Class of Securities)

25862B109

(CUSIP Number)

03/31/2026

(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 165,051.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 165,051.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

165,051.00

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)

6.66 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: Per Form 20-F filling for 12/31/25, each ADS is equivalent to .05 Common Shares in the company, so dividing the ADS held 165,051 by 20, we hold 8,252.55 common shares in the company. 20 ADS = 1 Common Share in company.

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 Depository Shares
(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: 165,051
(b)	Percent of class: 6.66 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Boston Partners - 165,051
	(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 - 165,051
	(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.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. This Schedule is being filed with respect to 165,051 shares of the American Depository Shares of DoubleDown Interactive Co., Ltd. (American Depository Shares) held by Boston Partners on 06/30/2026 for the discretionary account of certain clients. They represent 8,252.55 common shares in the company. By reason of rule 13d-3 under the act Boston Partners may be deemed to be a beneficial owner of such Common Stock. To the knowledge of Boston Partners no person has the right to receive or the power to direct the receipt of dividends from or the proceeds from the sale of such Common Stock which represents more than 5% of the outstanding shares of the American Depository Shares referred to in item 4(b) hereof.
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:	08/04/2026