X0202 SCHEDULE 13G 0001743937 XXXXXXXX LIVE Class A Common Stock, par value $0.0001 per share 06/30/2026 0002090646 Boost Run Inc. 09940T100 5 REVERE DRIVE, SUITE 200 NORTHBROOK IL 60062 Rule 13d-1(b) TOMS Capital Investment Management LP DE 0.00 3125000.00 0.00 3125000.00 3125000.00 N 9.8 IA PN Boost Run Inc. 5 Revere Drive, Suite 200, Northbrook, IL 60062 This statement is filed by TOMS Capital Investment Management LP ("TCIM" or the "Reporting Person"), with respect to Class A common stock, par value $0.0001 per share (the "Class A Common Stock"), of Boost Run Inc. (the "Issuer") held by certain funds and accounts to which TCIM serves as the investment manager (the "TCIM Funds"). TCIM Management GP LLC ("TCIM GP") is the General Partner of TCIM, and Noam Gottesman is the Senior Member of TCIM GP. Each of TCIM and TCIM GP have established a management board which has been delegated responsibility for all aspects of the management and operation of TCIM and TCIM GP. The filing of this statement should not be construed as an admission that the Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, as amended, the beneficial owner of the securities reported herein. 450 West 14th Street, 13th Floor, New York, NY 10014 Delaware N IA The information required by Item 4(a) is set forth in Row 9 of the cover page for the Reporting Person and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 31,895,656 shares of Class A Common Stock outstanding as of June 1, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026, filed with the Securities and Exchange Commission on June 1, 2026. 9.8% The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for the Reporting Person and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for the Reporting Person and is incorporated herein by reference. Y N See Item 2(a). The TCIM Funds have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Class A Common Stock reported herein. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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. TOMS Capital Investment Management LP /s/ Josh Levine 08/14/2026