As of November 10, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Launch One Acquisition Corp. The largest reported stake is MMCAP International Inc. SPC's, at 6.4%. 10 filings are on record since August 12, 2025 (Schedule 13G/A, February 13, 2026).
Sell to companies like Launch One Acquisition Corp? Enter your website and see 10 with a filed reason to buy from you this month. Free.
Opens in a new tab. No signup.
Key facts
- · Reporting person: W. R. Berkley Corporation · Sole voting: 0 · Shared voting: 263,767 · Sole dispositive: 0 · Shared dispositive: 263,767 · SCHEDULE 13G/A, 2026-11-09
- · Reporting person: Picton Mahoney Asset Management · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-10-20
- · Reporting person: Mizuho Financial Group, Inc. · Sole voting: 20,000 · Shared voting: 0 · Sole dispositive: 20,000 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-08-13
- · Reporting person: MMCAP International Inc. SPC · Sole voting: 0 · Shared voting: 1,480,000 · Sole dispositive: 0 · Shared dispositive: 1,480,000 · SCHEDULE 13G/A, 2026-02-13
- · Holder: Barclays PLC · Percent: 0% · SCHEDULE 13G/A
Launch One Acquisition Corp. has 10 Schedule 13D or 13G filings on record since 2025-08-12. 1 holder's latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| MMCAP International Inc. SPC | 6.4% | 1,480,000 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| W. R. Berkley Corporation | 3.5% | 263,767 | SCHEDULE 13G/A, 2026-11-09 | 2026-09-30 |
| Mizuho Financial Group, Inc. | 0.1% | 20,000 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
| Barclays PLC | 0% | 0 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
| Picton Mahoney Asset Management | 0% | 0 | SCHEDULE 13G/A, 2026-10-20 | 2026-09-30 |
Holding shares or following this stake? See who's behind Launch One Acquisition Corp. and the warning signs.
Free to see. No signup.
Keep reading
More on Launch One Acquisition Corp. and the records around it.
Launch One Acquisition Corp. elsewhere on the record
- Leadership changes Jun 2026
Companies that share a holder
- PICTON MAHONEY ASSET MANAGEMENT also filed stake reports on 20 other companies: Blue Water Acquisition Corp. III (Oct 2026), Pono Capital Four, Inc. (Oct 2026), Social Commerce Partners Corp (Oct 2026)
- MMCAP International Inc. SPC also filed stake reports on 52 other companies: BHAV Acquisition Corp II (Nov 2026), Haymaker Acquisition Corp V (Sep 2026), Thunder Bridge Capital Partners V, Ltd. (Aug 2026)
- Mizuho Financial Group, Inc. also filed stake reports on 74 other companies: Aeon Acquisition I Corp. (Aug 2026), Alpex Acquisition Corp (Aug 2026), Aperture AC (Aug 2026)
Watch Launch One Acquisition Corp.
Get an email when Launch One Acquisition Corp. files again: a new raise, a leadership change, a layoff or an IPO filing. One email first to confirm; nothing else until you click it. At most one a day, one click to stop. Free for up to 3 companies.
Want the whole picture on Launch One Acquisition Corp.?
Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)
A Full Report on Launch One Acquisition Corp.: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Launch One Acquisition Corp. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
11 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
Not ready to order yet? Keep this snapshot.
Sends this preview to you once; we won't add you to any list
Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| MMCAP International Inc. SPC | 0 | 1,480,000 | 0 | 1,480,000 | SCHEDULE 13G/A, 2026-02-13 |
| MM Asset Management Inc. | 0 | 1,480,000 | 0 | 1,480,000 | SCHEDULE 13G/A, 2026-02-13 |
| W. R. Berkley Corporation | 0 | 263,767 | 0 | 263,767 | SCHEDULE 13G/A, 2026-11-09 |
| Berkley Insurance Company | 0 | 263,767 | 0 | 263,767 | SCHEDULE 13G/A, 2026-11-09 |
| Mizuho Financial Group, Inc. | 20,000 | 0 | 20,000 | 0 | SCHEDULE 13G/A, 2026-08-13 |
| Picton Mahoney Asset Management | 0 | 0 | 0 | 0 | SCHEDULE 13G/A, 2026-10-20 |
The latest filing identifies Launch One Acquisition Corp. by CUSIP G5S86M100 and gives its principal executive office as 180 Grand Avenue, Suite 1530, Oakland, CA 94612 (SCHEDULE 13G/A, 2026-11-09).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-12 | Barclays PLC | 7.99% | SCHEDULE 13G |
| 2025-08-12 | MMCAP International Inc. SPC | 6.44% | SCHEDULE 13G/A |
| 2026-02-10 | W. R. Berkley Corporation | 6.2% | SCHEDULE 13G |
| 2026-02-12 | Mizuho Financial Group, Inc. | 6.2% | SCHEDULE 13G |
| 2026-02-13 | Barclays PLC | 0% | SCHEDULE 13G/A |
| 2026-02-13 | MMCAP International Inc. SPC | 8.1% | SCHEDULE 13G/A |
| 2026-02-13 | MMCAP International Inc. SPC | 6.4% | SCHEDULE 13G/A |
| 2026-08-13 | Mizuho Financial Group, Inc. | 0.1% | SCHEDULE 13G/A |
| 2026-10-20 | Picton Mahoney Asset Management | 0% | SCHEDULE 13G/A |
| 2026-11-09 | W. R. Berkley Corporation | 3.5% | SCHEDULE 13G/A |
Questions about who owns Launch One Acquisition Corp.
Who owns Launch One Acquisition Corp.?
On this page, one holder's latest ownership filing reports 5% or more of Launch One Acquisition Corp.: MMCAP International Inc. SPC (6.4%, Schedule 13G/A, filed 2026-02-13).
When did MMCAP International Inc. SPC buy into Launch One Acquisition Corp.?
The filings give report dates, not purchase dates. The earliest filing from MMCAP International Inc. SPC on this page is the Schedule 13G/A, filed 2025-08-12, reporting 6.44%; its latest, Schedule 13G/A filed 2026-02-13, reports 6.4%. That earliest filing is itself an amendment, which updates an earlier report.
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%); 10 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 Launch One Acquisition Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| June 2, 2026 | Leadership change: Daniel Clifford Rogers appointed, Director, and 1 more | — | Leadership changes | Source |
Tools for this story
Each opens in a new tab, filled in for Launch One Acquisition Corp.. With no account yet, you sign up free and land on the result.
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.