SCHEDULE 13G 0001859787 XXXXXXXX LIVE Class A ordinary shares, par value CHF 0.10 per share 06/30/2025 0001858985 On Holding AG H5919C104 FORRLIBUCKSTRASSE 190 8005 ZURICH V8 00000 Rule 13d-1(d) Maurer Marc b V8 2835633.00 0.00 2835633.00 0.00 2835633.00 N 0.9 IN Note to Rows 5, 7 and 9: Consists of: (a) 2,835,633 Class A ordinary shares owned by Mr. Maurer (including 618,358 Class A ordinary shares underlying options and option awards that have vested). Note to Row 11: Represents the quotient obtained by dividing (a) the number of Class A ordinary shares and Class B voting rights shares beneficially owned by Mr. Maurer as set forth in Row 9 by (b) an aggregate of 327,157,741 Class A ordinary shares outstanding, consisting of (i) 293,666,073 Class A ordinary shares outstanding as of June 30, 2025, as reported by the Issuer to the Reporting Person (including 618,358 Class A ordinary shares underlying options and option awards held by Mr. Maurer that have vested), and (ii) 33,491,668 Class A ordinary shares issuable upon conversion of the Class B voting rights shares outstanding as of June 30, 2025. Note to Rows 6, 7, 8, 9 and 11: Unless otherwise noted, information is presented as of June 30, 2025. On Holding AG Forrlibuckstrasse 190 8005 Zurich, Switzerland This Schedule 13G/A is being filed by Marc Maurer (the "Reporting Person"). The principal office and business address of the Reporting Person is c/o On Holding AG, Forrlibuckstrasse 190, 8005 Zurich, Switzerland. See row 4 of the cover page to this Schedule 13G/A. Y See row 9 of the cover sheet. See row 11 of the cover sheet. % See row 5 of the cover sheet. See row 6 of the cover sheet. See row 7 of the cover sheet. See row 8 of the cover sheet. Y Y Y N If a group has filed this schedule pursuant to ss.240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to ss.240.13d-1(c) or ss.240.13d-1(d), attach an exhibit stating the identity of each member of the group. Y Y Maurer Marc /s/ Marc Maurer 08/12/2025