Latest Period
Q1 2026
Security Snapshot
GP-Act III Acquisition Corp. - Common (GPAT) Institutional Ownership
CUSIP: G4035N103
13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026
Institutions Reporting
51
Shares (Excl. Options)
26,553,764
Price
$10.84
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- Security type / class
- Equity / Common
- Symbol
- GPAT on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 26,553,764
- Total 13F value
- $287,820,089
- Portfolio coverage rank
- 0%
- Share change
- -2,038,422
- Value change
- -$21,834,180
- Number of holders
- 51
- Shares outstanding
- 16,216,216
- SEC-reported price per share
- $10.84
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GPAT - GP-Act III Acquisition Corp. - Common is tracked under CUSIP G4035N103.
- 51 institutions reported positions in Q1 2026.
- 7 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 52 to 51 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $305,696,913 to $287,820,089.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 51 institutions filings for Q1 2026.
Security key
G4035N103
Latest holder period
Q1 2026
13F holders
51
13D/G owners
7
CIK / CUSIP context first
Open Q1 2026 holders
GPAT full holder history
GP-Act III Acquisition Corp. SEC filings
GP-Act III Acquisition Corp. company facts
GP-Act III Acquisition Corp. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G4035N103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
7
Security
GPAT
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| GP-Act III Sponsor LLC | 20% | $73,543,250 | 7,112,500 | GP-Act III Sponsor LLC | 14 Nov 2024 | |||
| HGC Investment Management Inc. | 8.6% | $25,591,500 | 2,475,000 | HGC Investment Management Inc | 31 Dec 2024 | |||
| METEORA CAPITAL, LLC | 6.7% | $20,329,839 | 1,926,999 | Meteora Capital, LLC | 30 Jun 2025 | |||
| PICTON MAHONEY ASSET MANAGEMENT | 6.5% | $19,387,500 | 1,875,000 | Picton Mahoney Asset Management | 30 Sep 2024 | |||
| Polar Asset Management Partners Inc. | 11% | +175% | $19,512,000 | +$6,775,043 | 1,800,000 | +53% | Polar Asset Management Partners Inc. | 31 May 2026 |
| BARCLAYS PLC | 5.2% | 0% | $15,365,126 | 1,485,989 | 0% | Barclays PLC | 30 Sep 2024 | |
| MMCAP International Inc. SPC | 4.4% | -40% | $13,451,250 | -$8,440,000 | 1,275,000 | -39% | MMCAP International Inc. SPC | 30 Jun 2025 |
As of 31 Mar 2026, 51 institutional investors reported holding 26,553,764 shares of GP-Act III Acquisition Corp. - Common (GPAT). This represents 164% of the company’s total 16,216,216 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
148%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Karpus Management, Inc. | 14% | 2,230,216 | -4.4% | 0.75% | $24,175,541 |
| First Trust Capital Management L.P. | 13% | 2,091,077 | 0% | 1.2% | $22,667,275 |
| Alberta Investment Management Corp | 10% | 1,625,000 | 0% | 0.11% | $17,615,000 |
| AQR Arbitrage LLC | 9.7% | 1,576,803 | +0.04% | 0.28% | $17,092,545 |
| D. E. Shaw & Co., Inc. | 8.8% | 1,423,125 | 0% | 0.01% | $15,426,675 |
| PICTON MAHONEY ASSET MANAGEMENT | 8.5% | 1,375,000 | -27% | 0.16% | $14,905,000 |
| MMCAP International Inc. SPC | 7.9% | 1,275,000 | 0% | 1.2% | $13,821,000 |
| LMR Partners LLP | 7.6% | 1,225,000 | 0% | 0.12% | $13,279,000 |
| Polar Asset Management Partners Inc. | 7.2% | 1,174,996 | 0% | 0.3% | $12,736,957 |
| Wealthspring Capital LLC | 6.2% | 1,006,939 | -1.1% | 2.6% | $10,915,219 |
| Westchester Capital Management, LLC | 5.3% | 860,852 | -37% | 0.45% | $9,331,636 |
| BERKLEY W R CORP | 5.2% | 846,823 | +171% | 0.49% | $9,179,561 |
| Linden Advisors LP | 4.9% | 797,584 | 0% | 0.05% | $8,645,811 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 4.6% | 750,000 | 0% | 0.13% | $8,130,000 |
| WOLVERINE ASSET MANAGEMENT LLC | 4.6% | 745,440 | -22% | 0.13% | $8,080,570 |
| TORONTO DOMINION BANK | 3.9% | 635,465 | +59% | 0.01% | $6,888,441 |
| TWO SIGMA INVESTMENTS, LP | 3.9% | 625,000 | 0% | 0.01% | $6,775,000 |
| Radcliffe Capital Management, L.P. | 3.8% | 623,267 | +8.7% | 0.51% | $6,756,214 |
| L1 Global Manager Pty Ltd | 3.5% | 567,566 | 0% | 5% | $6,152,415 |
| JPMORGAN CHASE & CO | 3.4% | 549,898 | +1004% | 0% | $5,949,896 |
| ARISTEIA CAPITAL, L.L.C. | 3% | 490,750 | 0% | 0.12% | $5,319,730 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 2.8% | 452,072 | 0.31% | $4,891,419 | |
| HEIGHTS CAPITAL MANAGEMENT, INC | 2.4% | 388,719 | -6.6% | 1.2% | $4,213,714 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 2.2% | 360,013 | -14% | 0.2% | $3,902,541 |
| METEORA CAPITAL, LLC | 2.1% | 343,722 | -16% | 0.27% | $3,725,946 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
7
Latest
Q1 2026
Rows shown
1-7 of 7
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 26,553,764 | $287,820,089 | -$21,834,180 | $10.84 | 51 |
| 2025 Q4 | 28,592,186 | $305,696,913 | -$905,669 | $10.69 | 52 |
| 2025 Q3 | 28,464,967 | $301,709,090 | +$1,201,744 | $10.60 | 53 |
| 2025 Q2 | 27,893,423 | $294,132,103 | +$24,825,280 | $10.55 | 48 |
| 2025 Q1 | 26,156,583 | $269,542,525 | -$1,553,040 | $10.30 | 40 |
| 2024 Q4 | 26,307,572 | $266,800,243 | +$12,250,289 | $10.14 | 42 |
| 2024 Q3 | 24,657,456 | $248,498,703 | +$243,861,903 | $10.08 | 37 |