X0202 SCHEDULE 13G/A 0001415889-25-021912 0001484529 XXXXXXXX LIVE 1 Class A Common Stock, par value $0.0001 03/31/2026 0001891027 MNTN, Inc. 55318A108 823 Congress Avenue #1827 Austin TX 78768 Rule 13d-1(d) Greycroft Partners II, L.P. b DE 0.00 3911969.00 0.00 3911969.00 3911969.00 6.4 PN Greycroft Managers II, LLC b DE 0.00 3911969.00 0.00 3911969.00 3911969.00 6.4 OO Greycroft Growth III, L.P. b DE 0.00 2162939.00 0.00 2162939.00 2162939.00 3.8 PN Greycroft Growth III, LLC b DE 0.00 2162939.00 0.00 2162939.00 2162939.00 3.8 OO MNTN, Inc. 823 Congress Avenue #1827, Austin, TX, 78768. The names of the persons filing this report (collectively, the "Reporting Persons") are: Greycroft Partners II, L.P. ("GCP II") Greycroft Managers II, LLC ("GCP II GP") Greycroft Growth III, L.P. ("GCG III") Greycroft Growth III, LLC ("GCG III GP") The Reporting Persons expressly disclaim status as a "group" for purposes of this Schedule 13G. c/o Greycroft LP 292 Madison Avenue, Fl. 8 New York, NY 10017 GCP II Delaware GCP II GP Delaware GCG III Delaware GCG III GP Delaware Y Row 9 of each Reporting Person's cover page to this Schedule 13G sets forth the aggregate number of securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. The Reporting Persons' ownership of the Issuer's securities consists of (i) 5,044,866 shares of Class B common stock directly held by GCP II; and (ii) 2,061,643 shares of Class A common stock and 130,631 shares of Class B common stock directly held by GCG III. Each share of Class B common stock is convertible into one share of Class A common stock, subject to the limitation described in the following paragraph. Pursuant to an agreement among the Reporting Persons and the Issuer, the Reporting Persons are prohibited from converting their shares of Class B common stock into Class A common stock to the extent that, following such conversion, the Reporting Persons (and their attribution parties) would collectively own in excess of 9.99% of the outstanding Class A common stock (the "Conversion Restriction"). By virtue of the Conversion Restriction, as of March 31, 2026, the Reporting Persons were permitted to convert an aggregate of 4,013,265 shares of Class B common stock to Class A common stock. For purposes of this Schedule 13G, the beneficial ownership of shares issuable upon conversion of the Class B common stock held by the Reporting Persons has been allocated to GCP II and GCG III in proportion to their respective holdings of Class B common stock. The Reporting Persons collectively beneficially owned an aggregate of 6,074,908 shares of Class A common stock as of March 31, 2026. GCP II GP is the general partner of GCP II and shares voting and investment authority over the shares held by GCP II. GCG III GP is the general partner of GCG III and shares voting and investment authority over the shares held by GCG III. The Reporting Persons expressly disclaim the existence of a "group" for purposes within the meaning of Section 13 of the Exchange Act and the filing of this report shall not be deemed an admission that the Reporting Persons constitute a group. Row 11 of each Reporting Person's cover page to this Schedule 13G sets forth the percentages of the securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. The percentage set forth in each row 11 is based upon (i) the sum of 56,796,624 shares of Class A common stock outstanding as of February 2, 2026, as disclosed in the Issuer's Annual Report on Form 10-K, filed with the Securities and Exchange Commission (the "SEC") on February 19, 2026, and (ii) 4,013,265 shares of Class A common stock issuable upon conversion of Class B common stock held by the Reporting Persons. The Reporting Persons collectively beneficially owned an aggregate of 9.99% of the Class A common stock as of March 31, 2026. Row 5 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. Row 6 of each Reporting Person's cover page to this Schedule 13G sets forth the shared power to vote or to direct the vote of securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. Row 7 of each Reporting Person's cover page to this Schedule 13G sets forth the sole power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. Row 8 of each Reporting Person's cover page to this Schedule 13G sets forth the shared power to dispose or to direct the disposition of securities of the Issuer beneficially owned by such Reporting Person as of March 31, 2026 and is incorporated by reference. Y Y Y Y Y Y Greycroft Partners II, L.P. /s/ Ian Sigalow 05/15/2026 Greycroft Managers II, LLC /s/ Ian Sigalow 05/15/2026 Greycroft Growth III, L.P. /s/ Ian Sigalow 05/15/2026 Greycroft Growth III, LLC /s/ Ian Sigalow 05/15/2026