# EDGAR Filing Document

**Accession Number:** 0001799567
**File Stem:** 0001193125-25-337074
**Filing Date:** 2025-12
**Character Count:** 15593
**Document Hash:** 4a0c5f90866fa11b87ba0de9e69514af
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-337074.hdr.sgml**: 20251230

**ACCESSION NUMBER**: 0001193125-25-337074

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251230

**DATE AS OF CHANGE**: 20251230

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DoubleDown Interactive Co., Ltd.
- **CENTRAL INDEX KEY:** 0001799567
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** M5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92842
- **FILM NUMBER:** 251614251

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 13F, GANGNAM FINANCE CENTER
- **STREET 2:** 152, TEHERAN-RO GANGNAM-GU
- **CITY:** SEOUL
- **PROVINCE COUNTRY:** M5
- **BUSINESS PHONE:** 822-501-7216

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 13F, GANGNAM FINANCE CENTER
- **STREET 2:** 152, TEHERAN-RO GANGNAM-GU
- **CITY:** SEOUL
- **PROVINCE COUNTRY:** M5
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** STIC Special Situation Diamond Ltd
- **CENTRAL INDEX KEY:** 0001815573

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** M5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A

**BUSINESS ADDRESS:**
- **STREET 1:** 11FL.MSA BLDG., 12 TEHERAN-RO 78-GIL
- **STREET 2:** GANGNAM-GU
- **CITY:** SEOUL
- **STATE:** M5
- **ZIP:** 06194
- **BUSINESS PHONE:** 82-2-3404-7827

**MAIL ADDRESS:**
- **STREET 1:** 11FL.MSA BLDG., 12 TEHERAN-RO 78-GIL
- **STREET 2:** GANGNAM-GU
- **CITY:** SEOUL
- **STATE:** M5
- **ZIP:** 06194

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 5)**

**Issuer:** DoubleDown Interactive Co., Ltd.

**Title of Class of Securities:** Common Shares, par value KRW10,000 per share

**CUSIP Number:** 25862B109

**Date of Event Which Requires Filing of this Statement:** 12/18/2025

**Check the appropriate box to designate the rule pursuant to which this Schedule is filed:**

- [ ] Rule 13d-1(b)

- [x] Rule 13d-1(c)

- [ ] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>STIC Special Situation Diamond Ltd. | Names of Reporting Persons<br>STIC Special Situation Diamond Ltd. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>M5 | Citizenship or Place of Organization<br>M5 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.8% | Percent of Class Represented by Amount in Row (9)<br>3.8% |
| 12. | Type of Reporting Person (See Instructions)<br>FI | Type of Reporting Person (See Instructions)<br>FI |

**Comment for Type of Reporting Person:** Comments to Items 5, 7 and 9: Reflects the number of Common Shares, which are represented by 1,882,187 American Depositary Shares ("ADSs"). Each ADS represents 0.05 share of a Common Share. There is no CUSIP number assigned to the Common Shares of the Issuer. CUSIP number 25862B109 has been assigned to the ADSs, which are listed on The NASDAQ Global Select Market under the symbol "DDI."

Comments to Item 11: This percentage is based on 2,477,672 Common Shares outstanding as of December 17, 2025 according to the Issuer's prospectus supplement filed with the U.S. Securities and Exchange Commission on December 17, 2025.

---

| 1. | Names of Reporting Persons<br>STIC Special Situation Private Equity Fund | Names of Reporting Persons<br>STIC Special Situation Private Equity Fund |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>M5 | Citizenship or Place of Organization<br>M5 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.8% | Percent of Class Represented by Amount in Row (9)<br>3.8% |
| 12. | Type of Reporting Person (See Instructions)<br>FI | Type of Reporting Person (See Instructions)<br>FI |

**Comment for Type of Reporting Person:** Comments to Items 5, 7 and 9: Reflects the number of Common Shares, which are represented by 1,882,187 American Depositary Shares ("ADSs"). Each ADS represents 0.05 share of a Common Share. There is no CUSIP number assigned to the Common Shares of the Issuer. CUSIP number 25862B109 has been assigned to the ADSs, which are listed on The NASDAQ Global Select Market under the symbol "DDI."

Comments to Item 11: This percentage is based on 2,477,672 Common Shares outstanding as of December 17, 2025 according to the Issuer's prospectus supplement filed with the U.S. Securities and Exchange Commission on December 17, 2025.

---

| 1. | Names of Reporting Persons<br>STIC Investments, Inc. | Names of Reporting Persons<br>STIC Investments, Inc. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>M5 | Citizenship or Place of Organization<br>M5 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>94109.35 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>94109.35 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>3.8% | Percent of Class Represented by Amount in Row (9)<br>3.8% |
| 12. | Type of Reporting Person (See Instructions)<br>FI | Type of Reporting Person (See Instructions)<br>FI |

**Comment for Type of Reporting Person:** Comments to Items 5, 7 and 9: Reflects the number of Common Shares, which are represented by 1,882,187 American Depositary Shares ("ADSs"). Each ADS represents 0.05 share of a Common Share. There is no CUSIP number assigned to the Common Shares of the Issuer. CUSIP number 25862B109 has been assigned to the ADSs, which are listed on The NASDAQ Global Select Market under the symbol "DDI."

Comments to Item 11: This percentage is based on 2,477,672 Common Shares outstanding as of December 17, 2025 according to the Issuer's prospectus supplement filed with the U.S. Securities and Exchange Commission on December 17, 2025.

---

**Item 1(a). Name of Issuer:**
DoubleDown Interactive Co., Ltd.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
13F, Gangnam Finance Center, 152, Teheran-ro Gangnam-gu, Seoul 06236, Republic of Korea

**Item 2(a). Name of Person Filing:**
STIC Special Situation Diamond Ltd.
STIC Special Situation Private Equity Fund
STIC Investments, Inc.

STIC Investments Inc. is the general partner of STIC Special Situation Private Equity Fund, which holds approximately 55.3% of the equity interest in STIC Special Situation Diamond Ltd. Opus Private Equity Fund II holds the remaining equity interest in STIC Special Situation Diamond Ltd. As the majority shareholder, STIC Special Situation Private Equity Fund has voting and dispositive power over the Common Shares directly held by STIC Special Situation Diamond Ltd. As the general partner of STIC Special Situation Private Equity Fund, STIC Investments Inc. has the voting and dispositive power over the Common Shares which are deemed to be beneficially owned by STIC Special Situation Private Equity Fund.

**Item 2(b). Address of Principal Business Office:**
The principal business office of STIC Special Situation Diamond Ltd., STIC Special Situation Private Equity Fund, and STIC Investments, Inc. is:
11F MSA Bldg., 12 Teheran-ro 78-gil, Gangnam-gu, Seoul 06194, Republic of Korea.

**Item 2(c). Citizenship:**
STIC Special Situation Diamond Ltd. is a foreign limited liability company organized under the laws of the Republic of Korea.
STIC Special Situation Private Equity Fund is a foreign limited partnership company established under the laws of the Republic of Korea.
STIC Investments, Inc. is a foreign corporation incorporated under the laws of the Republic of Korea.

**Item 2(d). Title of Class of Securities:**
Common Shares, par value KRW10,000 per share

**Item 2(e). CUSIP Number:**
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:**

As of the date hereof, STIC Special Situation Diamond Ltd. directly holds 94,109.35 Common Shares, which are represented by 1,882,187 ADSs.
As of the date hereof, as the majority shareholder of STIC Special Situation Diamond Ltd., STIC Special Situation Private Equity Fund may be deemed to have beneficially own 94,109.35 Common Shares, which are represented by 1,882,187 ADSs.
As of the date hereof, as the general partner of STIC Special Situation Private Equity Fund, STIC Investments, Inc. may be deemed to have beneficially own 94,109.35 Common Shares, which are represented by 1,882,187 ADSs.

**(b) Percent of class:**

The information contained on the cover pages to this Amendment is incorporated by reference herein.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

The information contained on the cover pages to this Amendment is incorporated by reference herein.

**(ii) Shared power to vote or to direct the vote:**

The information contained on the cover pages to this Amendment is incorporated by reference herein.

**(iii) Sole power to dispose or to direct the disposition of:**

The information contained on the cover pages to this Amendment is incorporated by reference herein.

**(iv) Shared power to dispose or to direct the disposition of:**

The information contained on the cover pages to this Amendment is incorporated by reference herein.

**Item 5. Ownership of Five Percent or Less of a Class.**

[ ] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

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, 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.

**STIC Special Situation Diamond Ltd.**

**Date:** 12/30/2025

**By:** /s/ Jin Ho Chai

**Name & Title:** Jin Ho Chai/Director

**STIC Special Situation Private Equity Fund**

**Date:** 12/30/2025

**By:** /s/ Dong Guel Kwak

**Name & Title:** Dong Guel Kwak/Representative Director of STIC Investments, Inc., as the General Partner of STIC Special Situation Private Equity Fund

**STIC Investments, Inc.**

**Date:** 12/30/2025

**By:** /s/ Dong Guel Kwak

**Name & Title:** Dong Guel Kwak/Director