Wellington Trust reports 4.71% stake in MNTN

MNTN, Inc. Schedule 13G/A amendment reports that Wellington Trust Company beneficially owns 2,673,034 shares of Common Stock, equal to 4.71% of the class as of 03/31/2026.

Rhea-AI Filing Summary

MNTN, Inc. Schedule 13G/A amendment reports that Wellington Trust Company beneficially owns 2,673,034 shares of Common Stock, equal to 4.71% of the class as of 03/31/2026. The filing states the shares are held of record by clients and Wellington Trust Company, NA filed in its capacity as investment adviser.

The filing shows shared voting power and shared dispositive power of 2,673,034 shares and notes no single client is known to hold more than five percent. The Schedule is signed by an authorized person on 05/15/2026.

Insights

Institutional Ownership Specialist

Wellington Trust reports a sub‑5% advisory holding in MNTN common stock.

The Schedule 13G/A amendment records 2,673,034 shares and a 4.71% ownership stake as of 03/31/2026. The filing attributes record ownership to clients and identifies Wellington Trust Company, NA as the filing adviser.

Because the position is reported under shared voting and dispositive power and is below 5%, this is a passive, regulatory ownership disclosure; subsequent filings would reflect any material increases or changes in voting control.

Key Figures

Beneficial ownership: 2,673,034 shares Percent of class: 4.71% Shared voting power: 2,673,034 shares +3 more

6 metrics

Beneficial ownership 2,673,034 shares as of 03/31/2026

Percent of class 4.71% reported on Schedule 13G/A

Shared voting power 2,673,034 shares voting power reported in Item 4

Shared dispositive power 2,673,034 shares dispositive power reported in Item 4

CUSIP 55318A108 MNTN Common Stock

Signature date 05/15/2026 authorized person signed Schedule 13G/A

Key Terms

Schedule 13G/A, Beneficial ownership, Shared dispositive power, Investment adviser

4 terms

Schedule 13G/A regulatory

"Schedule 13G/A amendment reports beneficial ownership (first line)"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"Amount beneficially owned: 2,673,034 (Item 4)"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Shared dispositive power regulatory

"Shared Dispositive Power 2,673,034.00 (Item 4)"

Investment adviser regulatory

"filed by Wellington Trust Company, NA in its capacity as investment adviser"

An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Wellington Trust Company report in MNTN (MNTN)?

Wellington Trust Company reports beneficial ownership of 2,673,034 shares, representing 4.71% of MNTN common stock as of 03/31/2026. The position is reported in a Schedule 13G/A amendment filed by the adviser.

Does Wellington Trust have voting or dispositive power over MNTN shares?

The filing shows shared voting power and shared dispositive power for 2,673,034 shares. It discloses no sole voting or sole dispositive power for these shares in the provided excerpt.

Are the MNTN shares owned directly by Wellington Trust Company?

No. The Schedule states the shares are owned of record by clients; Wellington Trust Company, NA filed the schedule in its capacity as investment adviser for those clients and not as sole beneficial owner.

Is any single client reported to hold more than 5% of MNTN common stock?

The Schedule states that no client known to the filer is known to have the right to receive dividends or proceeds with respect to more than five percent of the class; the filing lists Not Applicable for such clients.

What are the important dates on the Schedule 13G/A for MNTN?

The ownership is reported as of 03/31/2026, and the Schedule 13G/A amendment is signed by an authorized person on 05/15/2026, per the excerpt provided.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 08:01 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

MNTN, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

55318A108

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 55318A108

1

Names of Reporting Persons

Wellington Trust Company, NA

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,673,034.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,673,034.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,673,034.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.7 %

12

Type of Reporting Person (See Instructions)

BK

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MNTN, Inc.
(b)	Address of issuer's principal executive offices: 823 Congress Ave, Suite 1827, Austin TX 78768
Item 2.
(a)	Name of person filing: Wellington Trust Company, NA
(b)	Address or principal business office or, if none, residence: c/o Wellington Management Company LLP, 280 Congress Street, Boston MA 02210
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 55318A108
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: 2,673,034
(b)	Percent of class: 4.71 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 2,673,034
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 2,673,034
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The securities as to which this Schedule is filed by Wellington Trust Company, NA, in its capacity as investment adviser, are owned of record by clients of Wellington Trust Company, NA. Those clients have the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known to have such right or power with respect to more than five percent of this class of securities, except as follows: 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:

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.

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.

Wellington Trust Company, NA

Signature:	Matthew N. Shea
Name/Title:	Authorized Person
Date:	05/15/2026