Comparable stake leader
Launch One Sponsor LLC
SEC ownership of Launch One Acquisition Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002015502.
Disclosed value leader
Launch One Sponsor LLC
Comparable rows
28/50
Latest evidence
31 Mar 2026
- Public ticker
- LPAA, LPAAU, LPAAW on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Launch One Sponsor LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
28 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Launch One Sponsor LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002015502
- Issuer location
- Oakland, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Launch One Acquisition Corp. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Launch One Sponsor LLC
Disclosed value leader
Launch One Sponsor LLC
Comparable rows
28/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 20%
22 rows are not safely comparable across share classes.
13D/G row: Launch One Sponsor LLC
Showing 1-8 of 50 holder rows.
Quick read
Launch One Sponsor LLC leads the comparable SEC ownership view at 20%.
28 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Launch One Sponsor LLC's linked filing trail.
Comparable ownership
Top 5
Launch One Sponsor LLC
20%
PICTON MAHONEY ASSET MANAGEMENT
7.3%
AQR CAPITAL MANAGEMENT LLC
6.8%
MMCAP International Inc. SPC
6.4%
BERKLEY W R CORP
6.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Launch One Sponsor LLC |
13D/G
|
20%
|
$58,995,000
5,750,000 shares
|
$0 | 31 Dec 2024 |
| PICTON MAHONEY ASSET MANAGEMENT |
13F
13D/G
Company
|
7.3%
from 13D/G
|
$17,984,500
2,404,634 shares
mixed-class rows
|
— | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC |
13D/G
|
6.8%
|
$16,167,113
1,575,742 shares
|
$0 | 31 Dec 2024 |
| MMCAP International Inc. SPC |
13F
13D/G
Company
|
6.4%
from 13D/G
|
$15,987,420
2,470,000 shares
mixed-class rows
|
— | 31 Mar 2026 |
| BERKLEY W R CORP |
13F
13D/G
Company · W. R. Berkley Corporation
|
6.2%
from 13D/G
|
$15,927,109
1,487,125 shares
|
— | 31 Mar 2026 |
| MIZUHO FINANCIAL GROUP INC |
13D/G
|
6.2%
|
$15,150,103
1,429,255 shares
|
$0 | 31 Dec 2025 |
| First Trust Capital Management L.P. |
13F
Company
|
9%
|
$22,169,700
2,070,000 shares
|
— | 31 Mar 2026 |
| MIZUHO SECURITIES USA LLC |
13F
Company
|
6.4%
|
$15,795,143
1,483,112 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 21 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-8 of 8 reporting-owner rows connected to Launch One Acquisition Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
8
Largest Forms 3/4/5 holder
BARCLAYS PLC
Net 12M change
$0
Latest report
02 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| BARCLAYS PLC | 10%+ Owner | Mixed | 18 Jul 2024 | |||
| Brian G. Atwood | Director | Mixed | 11 Jul 2024 | |||
| Christopher B. Ehrlich | Chief Executive Officer, Director | Mixed | 11 Jul 2024 | |||
| Jurgen Johannes van de Vyver | Chief Financial Officer, Director | Mixed | 11 Jul 2024 | |||
| Risa Stack | Director | Mixed | 11 Jul 2024 | |||
| Rodney A. Ferguson | Director | Mixed | 11 Jul 2024 | |||
| Launch One Sponsor LLC | 10%+ Owner | Mixed | 11 Jul 2024 | |||
| Daniel Clifford Rogers | Director | Mixed | 02 Jun 2026 |
Recent insider transactions for Launch One Acquisition Corp.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.