Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Checkbox not checked   Rule 13d-1(b)
Checkbox checked   Rule 13d-1(c)
Checkbox not checked   Rule 13d-1(d)






SCHEDULE 13G




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.


SCHEDULE 13G




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.


SCHEDULE 13G




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.


SCHEDULE 13G



 
STIC Special Situation Diamond Ltd.
 
Signature:/s/ Jin Ho Chai
Name/Title:Jin Ho Chai/Director
Date:12/30/2025
 
STIC Special Situation Private Equity Fund
 
Signature:/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
Date:12/30/2025
 
STIC Investments, Inc.
 
Signature:/s/ Dong Guel Kwak
Name/Title:Dong Guel Kwak/Director
Date:12/30/2025