UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of July, 2023

Commission File Number 001-39349

DoubleDown Interactive Co., Ltd.

(Translation of registrant’s name into English)

Joseph A. Sigrist, Chief Financial Officer

c/o DoubleDown Interactive, LLC

605 5^th Avenue, Suite 300

Seattle, WA 98104

+1-206-408-4545

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.    ☒  Form 20-F    ☐  Form 40-F

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

Issuance of Press Release

On July 19, 2023, DoubleDown Interactive Co., Ltd. (the “Company”) issued a press release to announce that the Company will release its unaudited financial results for the second quarter ended June 30, 2023 on Tuesday, August 8, 2023, and hold a conference call at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time) on the same date to discuss the second quarter financial results.

A copy of the press release is being furnished in this report on Form 6-K as Exhibit 99.1 pursuant to General Instruction B to the Form 6-K and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

EXHIBIT INDEX

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

DOUBLEDOWN INTERACTIVE TO REPORT 2023 SECOND QUARTER RESULTS ON

AUGUST 8 AND HOST CONFERENCE CALL AND WEBCAST

SEATTLE, WASHINGTON – JULY 19, 2023 — DoubleDown Interactive (NASDAQ: DDI) (“DoubleDown” or the “Company”), a leading developer and publisher of digital games on mobile and web-based platforms, announced today that it will release its 2023 second quarter financial results after the market closes on Tuesday, August 8, 2023, and host a conference call and simultaneous webcast at 5:00 p.m. ET (2:00 p.m. PT) that day. Both the call and webcast are open to the general public. On the call, DoubleDown management will review the Company’s financial results and provide a business update, followed by a question-and-answer period.

To access the call, please use the following link: DoubleDown Second Quarter 2023 Earnings Call. After registering, an email will be sent, including dial-in details and a unique conference call access code required to join the live call. To ensure you are connected prior to the beginning of the call, please register a minimum of 15 minutes before the start of the call.

A simultaneous webcast of the conference call will be available at: DoubleDown Second Quarter 2023 Earnings Webcast, or via the Investor Relations page of the DoubleDown website at ir.doubledowninteractive.com. A replay will be available on the Company’s Investor Relations website shortly after the event.

About DoubleDown Interactive

DoubleDown Interactive, Co. Ltd. is a leading developer and publisher of digital games on mobile and web-based platforms. We are the creators of multi-format interactive entertainment experiences for casual players, bringing authentic Vegas entertainment to players around the world through an online social casino experience. Our flagship title, DoubleDown Casino, has been a fan-favorite game on leading social and mobile platforms for years, entertaining millions of players worldwide with a lineup of classic and modern games.

Company Contact:

Joe Sigrist

ir@doubledown.com

+1 (206) 773-2266

Chief Financial Officer

https://www.doubledowninteractive.com

Investor Relations Contact:

Joseph Jaffoni or Richard Land

JCIR

+1 (212) 835-8500

DDI@jcir.com