Boston Partners reports 5.4% stake in DoubleDown ADS

DoubleDown Interactive Co., Ltd. ownership disclosure: Boston Partners reports beneficial ownership of 133,719 American Depository Shares (ADS), representing 5.4% of the ADS class as of 03/31/2026.

Rhea-AI Filing Summary

DoubleDown Interactive Co., Ltd. ownership disclosure: Boston Partners reports beneficial ownership of 133,719 American Depository Shares (ADS), representing 5.4% of the ADS class as of 03/31/2026. The filing states the ADS-to-common conversion ratio is 20 ADS = 1 common share, equating to 6,685.95 common shares held for discretionary client accounts. The filing notes Boston Partners may be deemed a beneficial owner under Rule 13d-3 and that the shares are held for discretionary client accounts.

Key Figures

ADS held: 133,719 ADS Percent of class: 5.4% Common share equivalent: 6,685.95 common shares +2 more

5 metrics

ADS held 133,719 ADS Amount beneficially owned as of 03/31/2026

Percent of class 5.4% Percent of ADS class reported in Schedule 13G

Common share equivalent 6,685.95 common shares Converted using 20 ADS = 1 common share (per Form 20-F disclosure)

Statement date 03/31/2026 Position date for the Schedule 13G

Filing signature date 05/14/2026 Signature date on the Schedule 13G

Key Terms

American Depository Shares (ADS), Schedule 13G, Rule 13d-3, Beneficial ownership

4 terms

American Depository Shares (ADS) financial

"Title and Item 2(d) list the security class as American Depository Shares"

American Depository Shares (ADS) are U.S.-listed securities issued by a bank that represent ownership of a specified number of shares in a foreign company, letting investors buy and sell that company in U.S. dollars on U.S. exchanges. They matter because they make it easier to invest in foreign firms—like buying a locally labeled product instead of importing it—affecting liquidity, dividend payments, regulatory disclosure and exposure to currency swings.

Schedule 13G regulatory

"Header identifies the form as SCHEDULE 13G reporting beneficial ownership"

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.

Rule 13d-3 regulatory

"Filing states Boston Partners 'may be deemed to be a beneficial owner' under rule 13d-3"

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.

Beneficial ownership financial

"Item 4(a) reports 'Amount beneficially owned: 133,719'"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

What stake does Boston Partners hold in DoubleDown Interactive (DDI)?

Boston Partners beneficially holds 133,719 ADS, equal to 5.4% of the ADS class as of 03/31/2026. The filing says the ADS represent 6,685.95 common shares using the disclosed ratio of 20 ADS = 1 common share.

How does the ADS-to-common conversion work for DDI in this filing?

The filing states 20 ADS = 1 common share. Using that ratio, the reported 133,719 ADS convert to 6,685.95 common shares, as calculated and disclosed by Boston Partners in the Schedule 13G.

Are the Boston Partners shares held directly or for clients in DDI?

The Schedule 13G states the 133,719 ADS are held by Boston Partners for the discretionary account of certain clients. The filing attributes beneficial ownership under Rule 13d-3 and does not name underlying clients.

Does Boston Partners report voting or dispositive power over the DDI ADS?

Yes. The filing lists sole voting power of 133,719 ADS and sole dispositive power of 133,719 ADS, with no shared voting or dispositive power reported in the Schedule 13G.

What date is the ownership position reported for DDI?

The ownership position is reported as of 03/31/2026. The Schedule 13G signature appears on 05/14/2026, when Boston Partners executed the filing to disclose the position as of the March date.

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

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Accepted by SEC EDGAR 05/14/2026 - 09:53 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

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 133,719.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 133,719.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

133,719.00

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)

5.4 %

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 133,719 by 20, we hold 6,685.95 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 Number(s): 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: 133,719
(b)	Percent of class: 5.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Boston Partners - 133,719
	(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 - 133,719
	(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 133,719 shares of the American Depository Shares of DoubleDown Interactive Co., Ltd. (American Depository Shares) held by Boston Partners on 03/31/2026 for the discretionary account of certain clients. They represent 6,685.95 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:	05/14/2026