X0202 SCHEDULE 13G/A 0000929638-26-003194 0001623658 XXXXXXXX LIVE 1 Class A Common Stock, $0.001 par value per share 08/20/2026 0001870600 Solo Brands, Inc. 83425V203 1001 Mustang Drive Grapevine TX 76051 Rule 13d-1(c) Vanguard Charitable Endowment Program PA 0 0 0 0 0 N 0 OO Solo Brands, Inc. 1001 Mustang Drive, Grapevine, Texas, 76051 Vanguard Charitable Endowment Program 100 Vanguard Boulevard, D29, Malvern, PA 19355 The Reporting Person is organized under the laws of the Commonwealth of Pennsylvania. Y 0 shares 0 % 0 shares 0 shares 0 shares 0 shares N 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. Vanguard Charitable Endowment Program /s/ Mark J. Froehlich 08/25/2026