As of November 8, 2026, 8 holders' latest Schedule 13D or 13G filings report owning 5% or more of Mntn Inc. The largest reported stake is Mark Douglas', at 17.8%. 24 filings are on record since July 29, 2025 (Schedule 13G, February 17, 2026).
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Key facts
- · Reporting person: Fmr LLC · Sole voting: 2,396,117 · Shared voting: 0 · Sole dispositive: 2,396,713 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-11-05
- · Reporting person: Wellington Management Group LLP · Sole voting: 0 · Shared voting: 4,276,778 · Sole dispositive: 0 · Shared dispositive: 5,630,486 · SCHEDULE 13G/A, 2026-08-13
- · Holder: Fmr LLC · Percent: 5.1% · SCHEDULE 13G
- · Holder: Wellington Management Group LLP · Percent: 10.3% · SCHEDULE 13G/A
- · Reporting person: QUALCOMM Incorporated · Sole voting: 147,000 · Shared voting: 0 · Sole dispositive: 147,000 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-07-16
Mntn Inc has 24 Schedule 13D or 13G filings on record since 2025-07-29. 8 holders' latest filing reports 5% or more of class a common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 17.8% | 9,586,506 | SCHEDULE 13G, 2026-02-17 | 2025-06-30 | |
| Mercato Partners Growth III GP, LLC | 12.8% | 6,168,022 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Baroda Ventures LLC | 12.2% | 6,711,098 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Wellington Management Group LLP | 9.2% | 5,630,486 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
| MGD Holdings | 8% | 4,154,041 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| Peak Investment Holdings, LLC | 7.1% | 3,077,442 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 |
| 6.8% | 3,483,927 | SCHEDULE 13G, 2025-08-14 | 2025-06-30 | |
| Greycroft Partners II, L.P. | 6.4% | 3,911,969 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Wellington Trust Company, NA | 4.7% | 2,673,034 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Fmr LLC | 3.9% | 2,396,713 | SCHEDULE 13G/A, 2026-11-05 | 2026-09-30 |
| 0.24% | 147,000 | SCHEDULE 13G/A, 2026-07-16 | 2026-06-30 |
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More on Mntn Inc and the records around it.
Mntn Inc elsewhere on the record
- Leadership changes Nov 2026
- Who owns it
Companies that share a holder
- Wellington Trust Company, NA also filed stake reports on 1 other company: OppFi Inc. (Aug 2026)
- Wellington Management Group LLP also filed stake reports on 240 other companies: Hub Group, Inc. (Oct 2026), Latham Group, Inc. (Oct 2026), Redwood Trust, Inc. (Oct 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 0 | 4,276,778 | 0 | 5,630,486 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Group Holdings LLP | 0 | 4,276,778 | 0 | 5,630,486 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Investment Advisors Holdings LLP | 0 | 4,276,778 | 0 | 5,630,486 | SCHEDULE 13G/A, 2026-08-13 |
| Wellington Management Company LLP | 0 | 4,276,778 | 0 | 5,158,189 | SCHEDULE 13G/A, 2026-08-13 |
| Fmr LLC | 2,396,117 | 0 | 2,396,713 | 0 | SCHEDULE 13G/A, 2026-11-05 |
| Abigail P. Johnson | 0 | 0 | 2,396,713 | 0 | SCHEDULE 13G/A, 2026-11-05 |
| QUALCOMM Incorporated | 147,000 | 0 | 147,000 | 0 | SCHEDULE 13G/A, 2026-07-16 |
The latest filing identifies Mntn Inc by CUSIP 55318A108 and gives its principal executive office as 823 CONGRESS AVENUE, #1827, AUSTIN, TX 78768 (SCHEDULE 13G/A, 2026-11-05).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-29 | QUALCOMM Incorporated | 9.6% | SCHEDULE 13G |
| 2025-08-06 | Fmr LLC | 9% | SCHEDULE 13G/A |
| 2025-08-12 | Wellington Management Group LLP | 6.7% | SCHEDULE 13G |
| 2025-08-14 | James Michael Andelman | 6.8% | SCHEDULE 13G |
| 2025-08-14 | Baroda Ventures LLC | 12.2% | SCHEDULE 13G |
| 2025-08-14 | MGD Holdings | 8% | SCHEDULE 13G |
| 2025-08-14 | Mercato Partners Growth III GP, LLC | 12.8% | SCHEDULE 13G |
| 2025-08-14 | Peak Investment Holdings, LLC | 7.1% | SCHEDULE 13G |
| 2025-08-14 | Greycroft Partners II, L.P. | 5.4% | SCHEDULE 13G |
| 2025-09-08 | Wellington Management Group LLP | 11.8% | SCHEDULE 13G/A |
| 2025-11-12 | Wellington Trust Company, NA | 5.5% | SCHEDULE 13G |
| 2026-02-05 | Fmr LLC | 6.4% | SCHEDULE 13G/A |
| 2026-02-10 | Wellington Management Group LLP | 13% | SCHEDULE 13G/A |
| 2026-02-17 | Mark Douglas | 17.8% | SCHEDULE 13G |
| 2026-05-06 | Fmr LLC | 5% | SCHEDULE 13G/A |
| 2026-05-12 | QUALCOMM Incorporated | 5.5% | SCHEDULE 13G/A |
| 2026-05-15 | Wellington Trust Company, NA | 4.7% | SCHEDULE 13G/A |
| 2026-05-15 | Wellington Management Group LLP | 10.9% | SCHEDULE 13G/A |
| 2026-05-15 | Greycroft Partners II, L.P. | 6.4% | SCHEDULE 13G/A |
| 2026-07-16 | QUALCOMM Incorporated | 0.24% | SCHEDULE 13G/A |
| 2026-08-06 | Fmr LLC | 5.1% | SCHEDULE 13G |
| 2026-08-06 | Wellington Management Group LLP | 10.3% | SCHEDULE 13G/A |
| 2026-08-13 | Wellington Management Group LLP | 9.2% | SCHEDULE 13G/A |
| 2026-11-05 | Fmr LLC | 3.9% | SCHEDULE 13G/A |
Questions about who owns Mntn Inc
Who owns Mntn Inc?
On this page, 8 holders' latest ownership filings report 5% or more of Mntn Inc: Mark Douglas (17.8%, Schedule 13G, filed 2026-02-17), Mercato Partners Growth III GP, LLC (12.8%, Schedule 13G, filed 2025-08-14), Baroda Ventures LLC (12.2%, Schedule 13G, filed 2025-08-14), Wellington Management Group LLP (9.2%, Schedule 13G/A, filed 2026-08-13) and MGD Holdings (8%, Schedule 13G, filed 2025-08-14); 3 more are listed above.
Who are the largest shareholders of Mntn Inc?
By the share each holder's latest filing reports, the largest holders of Mntn Inc on this page are Mark Douglas (17.8%), Mercato Partners Growth III GP, LLC (12.8%) and Baroda Ventures LLC (12.2%).
When did Mark Douglas buy into Mntn Inc?
The filings give report dates, not purchase dates. The earliest filing from Mark Douglas on this page is the Schedule 13G, filed 2026-02-17, reporting 17.8%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 24 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Mntn Inc
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| November 4, 2026 | Leadership change: Tony Weisman appointed, President and Chief Executive Officer, and 2 more | — | Leadership changes | Source |
| May 22, 2025 | IPO filing, Form 424B4 | $16 a share | IPO filings | Source |
| May 21, 2025 | IPO filing, Form S-1/A | $14 to $16 a share | IPO filings | Source |
| May 14, 2025 | IPO filing, Form S-1/A | $14 to $16 a share | IPO filings | Source |
| April 30, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| March 12, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| February 28, 2025 | IPO filing, Form S-1 | — | IPO filings | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.