X0202 SCHEDULE 13G 0002016181 XXXXXXXX LIVE Common Stock, par value $0.0001 per share 05/22/2026 0000012239 DOMINARI HOLDINGS INC. 008875304 725 Fifth Avenue, 22nd Floor New York NY 10022 Rule 13d-1(c) Donald J. Trump Jr. X1 1182276.00 0.00 1182276.00 0.00 1182276.00 N 5.23 IN (1) The 1,182,276 shares of common stock of the Issuer beneficially owned and referred to in Rows 5, 7, and 9 represents 1,182,276 shares of common stock owned as of May 22, 2026. This excludes an aggregate of 216,138 shares issuable pursuant to certain warrants purchased by the Reporting Person in connection with the Issuer's offering that closed on February 12, 2025, which are not currently exercisable due to certain beneficial ownership limitations. (2) The percentage in Row 11 is based on 22,613,781 shares of common stock of the Issuer issued and outstanding as of May 12, 2026. DOMINARI HOLDINGS INC. 725 Fifth Avenue, 22nd Floor, New York, NY 10022 Donald J. Trump Jr. 115 Eagle Tree Terrace, Jupiter, Florida 33477 United States Y On May 22, 2026, the Reporting Person acquired 216,138 shares of common stock of the Issuer upon the exercise of 216,138 Series B warrants, which were issued pursuant to a warrant inducement transaction with the Issuer. As of May 28, 2026, the Reporting Person may be deemed to beneficially own 1,182,276 shares of common stock of the Issuer. The percentage of the shares of common stock beneficially owned by the Reporting Person is based on the (i) total of 1,182,276 shares of common stock owned as of May 22, 2026, divided by (ii) the sum of 22,613,781 shares of common stock of the Issuer issued and outstanding as of May 12, 2026. This excludes an aggregate of 216,138 shares issuable pursuant to certain warrants purchased by the Reporting Person in connection with the Issuer's offering that closed on February 12, 2025, which are not currently exercisable due to certain beneficial ownership limitations. The 1,182,276 shares of common stock of the Issuer beneficially owned by the Reporting Person constituted approximately 5.23% of the total shares of common stock of the Issuer issued and outstanding as of May 22, 2026. The percentage of the shares of common stock beneficially owned by the Reporting Person is based on the (i) total of 1,182,276 shares of common stock owned as of May 22, 2026, divided by (ii) the sum of 22,613,781 shares of common stock of the Issuer issued and outstanding as of May 12, 2026. This excludes an aggregate of 216,138 shares issuable pursuant to certain warrants purchased by the Reporting Person in connection with the Issuer's offering that closed on February 12, 2025, which are not currently exercisable due to certain beneficial ownership limitations. 1,182,276.00 0.00 1,182,276.00 0.00 Y Y Y Y Y N 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. Donald J. Trump Jr. /s/ Donald J. Trump Jr. 06/01/2026