X0609 4 2026-09-29 0 0002090646 Boost Run Inc. BRUN 0002130282 Guckel Erik false C/O BOOST RUN INC. 5 REVERE DRIVE, SUITE 200 NORTHBROOK IL 60062 0 1 0 0 Chief Financial Officer 0 Restricted Stock Units 2026-09-29 4 A 0 2890000 0 A Common Stock 2890000 2890000 D Each restricted stock unit represents a contingent right to receive one share of common stock of Boost Run Inc. On September 29, 2026, the reporting person was granted 2,890,000 restricted stock units, of which 40% will vest on May 15, 2027. The remaining 60% will vest in eight substantially equal installments on each of September 15, 2027, December 15, 2027, March 15, 2028, June 15, 2028, September 15, 2028, December 15, 2028, March 15, 2029, and June 15, 2029, in each case, subject to continued service. /s/ Erik Guckel 2026-10-01