Form SCHEDULE 13G/A MNTN, Inc. Filed by: Greycroft Partners II, L.P.

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

MNTN, Inc.

(b)

Address of issuer's principal executive offices:

823 Congress Avenue #1827, Austin, TX, 78768.

Item 2.

(a)

Name of person filing:

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.

(b)

Address or principal business office or, if none, residence:

c/o Greycroft LP 292 Madison Avenue, Fl. 8 New York, NY 10017

(c)

Citizenship:

GCP II Delaware GCP II GP Delaware GCG III Delaware GCG III GP Delaware

(d)

Title of class of securities:

Class A Common Stock, par value $0.0001

(e)

CUSIP No.:

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

(k)

Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

Item 4.

Ownership

(a)

Amount beneficially owned:

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.

(b)

Percent of class:

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. %

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

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.

(ii) Shared power to vote or to direct the vote:

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.

(iii) Sole power to dispose or to direct the disposition of:

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.

(iv) Shared power to dispose or to direct the disposition of:

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.

Item 5.

Ownership of 5 Percent or Less of a Class.

Item 6.

Ownership of more than 5 Percent on Behalf of Another Person.

Not Applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not Applicable

Item 8.

Identification and Classification of Members of the Group.

Not Applicable

Item 9.

Notice of Dissolution of Group.

Not Applicable

Item 10.

Certifications:

Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Greycroft Partners II, L.P.

Signature:	/s/ Ian Sigalow
Name/Title:	By Greycroft Managers II, LLC, its General Partner, By Ian Sigalow, Managing Partner
Date:	05/15/2026

Greycroft Managers II, LLC

Signature:	/s/ Ian Sigalow
Name/Title:	By Ian Sigalow, Managing Partner
Date:	05/15/2026

Greycroft Growth III, L.P.

Signature:	/s/ Ian Sigalow
Name/Title:	By Greycroft Growth III, LLC, its General Partner, By Ian Sigalow, Managing Partner
Date:	05/15/2026

Greycroft Growth III, LLC

Signature:	/s/ Ian Sigalow
Name/Title:	By Ian Sigalow, Managing Partner
Date:	05/15/2026

Form SCHEDULE 13G/A MNTN, Inc. Filed by: Greycroft Partners II, L.P.

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