SCHEDULE 13G/A 0001193125-24-033922 0001915397 XXXXXXXX LIVE 1 Class A common stock, par value $0.0001 per share 09/15/2025 0001915380 dMY Squared Technology Group, Inc. 233276104 1180 North Town Center Drive, Suite 100 Las Vegas NV 89144 Rule 13d-1(d) dMY Squared Sponsor, LLC DE 0.00 1163484.00 0.00 1163484.00 1163484.00 N 29.7 OO Harry L. You X1 0.00 1163484.00 0.00 1163484.00 1163484.00 N 29.7 IN (1) dMY Squared Sponsor, LLC (the "Sponsor"), owns 1,163,484 shares of Class B common stock of the Issuer ("Class B Common Stock"), which are convertible into shares of Class A common stock of the Issuer ("Class A Common Stock") (i) at any time and from time to time at the election of the holder and (ii) automatically concurrently with or immediately following the consummation of the Issuer's initial business combination on a one-for-one basis, in each case subject to adjustment. Harry L. You is the manager of the Sponsor and shares voting and investment discretion with respect to the securities held of record by the Sponsor. Mr. You disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly. (2) Excludes 2,884,660 shares of Class A Common Stock issuable upon exercise of 2,884,660 warrants held by the Sponsor, each exercisable at $11.50 per share, that are not exercisable within 60 days of the date hereof. (3) Based on an aggregate of 2,754,852 shares of Class A Common Stock outstanding as of the date of this Report, based on the records of the Issuer, plus 1,163,484 shares of Class A Common Stock issuable upon the conversion of 1,163,484 shares of Class B Common Stock held by the Sponsor. dMY Squared Technology Group, Inc. 1180 North Town Center Drive, Suite 100, Las Vegas, NV 89144 This statement is filed on behalf of dMY Squared Sponsor, LLC and Harry L. You (the "Reporting Persons"). The principal business address of each of the Reporting Persons is as follows: c/o dMY Squared Technology Group, Inc. 1180 North Town Center Drive, Suite 100 Las Vegas, NV 89144 See responses to row 4 on each cover page. Y See responses to row 9 on each cover page. See responses to row 11 on each cover page. See responses to row 5 on each cover page. See responses to row 6 on each cover page. See responses to row 7 on each cover page. See responses to row 8 on each cover page. The securities are held directly by dMY Squared Sponsor, LLC (the "Sponsor"). Harry L. You is the manager of the Sponsor and shares voting and dispositive control over the securities held directly by the Sponsor. Mr. You disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly. Y Y Y Y Y Y dMY Squared Sponsor, LLC /s/ Harry L. You 09/17/2025 Harry L. You /s/ Harry L. You 09/17/2025