Holder evidence
50
SEC ownership of GP-Act III Acquisition Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001834526.
Lead holder
GP-Act III Sponsor LLC
13D/G signal
GP-Act III Sponsor LLC
Latest evidence
31 Mar 2026
- CIK
- 0001834526
- Symbol
- GPAT, GPATU, GPATW on Nasdaq
- Location
- New York, NY
- SEC evidence mix
- 13D/G and 13F
- Lead holder
- GP-Act III Sponsor LLC
- Latest large-stake holder
- GP-Act III Sponsor LLC
- Latest evidence date
- 31 Mar 2026
Issuer identity
Ownership snapshot
Ownership snapshot
Top shareholders of GP-Act III 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.
Lead holder
GP-Act III Sponsor LLC
13D/G signal
GP-Act III Sponsor LLC
Evidence rows
50
Latest as of
31 Mar 2026
13D/G
13F
Lead comparable stake: 20%
13D/G row: GP-Act III Sponsor LLC
Showing 1-8 of 50 holder rows.
Rank 1 holder
GP-Act III Sponsor LLC
13D/G
- Ownership
- 20%
- Position
- $73.54M
Rank 2 holder
HGC Investment Management Inc.
13D/G
- Ownership
- 8.6%
- Position
- $25.59M
Rank 3 holder
METEORA CAPITAL, LLC
13D/G
13F
- Ownership
- 6.7%
- Position
- $20.33M
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| GP-Act III Sponsor LLC |
13D/G
|
20%
|
$73,543,250
7,112,500 shares
|
$0 | 14 Nov 2024 |
| HGC Investment Management Inc. |
13D/G
|
8.6%
|
$25,591,500
2,475,000 shares
|
$0 | 31 Dec 2024 |
| METEORA CAPITAL, LLC |
13D/G
13F
Company
|
6.7%
|
$20,329,839
1,926,999 shares
|
$0 | 30 Jun 2025 |
| PICTON MAHONEY ASSET MANAGEMENT |
13D/G
13F
Company
|
6.5%
|
$19,387,500
1,875,000 shares
|
$0 | 30 Sep 2024 |
| Karpus Management, Inc. |
13D/G
13F
Company
|
6.5%
|
$24,676,619
2,339,016 shares
|
-$13,740,826 | 30 Jun 2025 |
| BARCLAYS PLC |
13D/G
|
5.2%
|
$15,365,126
1,485,989 shares
|
$0 | 30 Sep 2024 |
| MMCAP International Inc. SPC |
13F
13D/G
Company
|
4.4%
from 13D/G
|
$13,966,458
2,312,500 shares
mixed-class rows
|
— | 31 Mar 2026 |
| Polar Asset Management Partners Inc. |
13F
13D/G
Company
|
4.1%
from 13D/G
|
$12,910,455
2,412,496 shares
mixed-class rows
|
— | 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 30 May 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 1-6 of 6 reporting-owner rows connected to GP-Act III Acquisition Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
6
Lead holder
Sergio Pedreiro
Net 12M change
$0
Latest report
08 May 2024
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Sergio Pedreiro | Director | Mixed | 08 May 2024 | |||
| Steven L. Spinner | Director | Mixed | 08 May 2024 | |||
| Alexandre Ruberti | Director | Mixed | 08 May 2024 | |||
| Andrew Fleiss | Director | Mixed | 08 May 2024 | |||
| Rodrigo Boscolo | Chief Financial Officer | Mixed | 08 May 2024 | |||
| GP-Act III Sponsor LLC | Director, 10%+ Owner | Mixed | 08 May 2024 |
Recent insider transactions for GP-Act III Acquisition Corp.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Reported value | Reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* indicates a reported price that failed the local validity check.