GP-Act III Acquisition Corp.
GPAT- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0001834526
No open-market purchases or sales by GP-Act III Acquisition Corp. insiders were filed in the last 90 days; 24 institutions reported holding it in 13F filings for Q2 2026, worth $96.2M in total; no superinvestor holds it.
Holders of 5% or more of GPAT
Holders whose latest Schedule 13D or 13G filing reports 5% or more of GP-Act III Acquisition Corp., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| GP-Act III Sponsor LLC | 13G | 19.83%7.11M shares | New | Mar 7, 20251 filing | Mar 7, 2025 | SEC |
| HGC Investment Management Inc. | 13G | 8.61%2.48M shares | New | Feb 14, 20251 filing | Feb 14, 2025 | SEC |
| Meteora Capital, LLC | 13G | 6.70%1.93M shares | New | Aug 14, 20251 filing | Aug 14, 2025 | SEC |
| Picton Mahoney Asset Management | 13G | 6.52%1.88M shares | New | Oct 17, 20241 filing | Oct 17, 2024 | SEC |
| Karpus Management, Inc. | 13G/A | 6.51%2.34M shares | −3.62 ppfrom 10.13% | Feb 14, 20252 filings | Aug 14, 2025 | SEC |
| Barclays PLC | 13G/A | 5.16%1.49M shares | 0.00 ppfrom 5.16% | Nov 13, 20242 filings | Mar 28, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
14 Schedule 13D and 13G filings on GP-Act III Acquisition Corp., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Feb 12, 20266:56 AM ET | Bank of Montrealand 3 others | 13G/A | 0.00%0 shares | −5.14 ppfrom 5.14%Below 5% | Dec 31, 2025 | SEC |
| Nov 13, 20259:59 AM ET | Bank of Montrealand 3 others | 13G | 5.14%1.48M shares | New | Sep 30, 2025 | SEC |
| Aug 14, 20254:06 PM ET | Karpus Management, Inc. | 13G/A | 6.51%2.34M shares | −3.62 ppfrom 10.13% | Jun 30, 2025 | SEC |
| Aug 14, 20252:42 PM ET | Polar Asset Management Partners Inc. | 13G/A | 4.10%1.17M shares | –Below 5% | Jun 30, 2025 | SEC |
| Aug 14, 202510:27 AM ET | Meteora Capital, LLC | 13G | 6.70%1.93M shares | New | Jun 30, 2025 | SEC |
| Aug 12, 20255:25 PM ET | MMCAP International Inc. SPCand 1 other | 13G/A | 4.44%1.27M shares | −2.78 ppfrom 7.22%Below 5% | Jun 30, 2025 | SEC |
| May 13, 20255:04 PM ET | MMCAP International Inc. SPCand 1 other | 13G/A | 7.22%2.08M shares | 0.00 ppfrom 7.22% | Mar 31, 2025 | SEC |
| Mar 28, 202512:28 PM ET | Barclays PLC | 13G/A | 5.16%1.49M shares | 0.00 ppfrom 5.16% | Sep 30, 2024 | SEC |
| Mar 7, 20256:16 PM ET | GP-Act III Sponsor LLCand 5 others | 13G | 19.83%7.11M shares | New | Nov 14, 2024 | SEC |
| Feb 14, 20254:04 PM ET | Karpus Management, Inc. | 13G/A | 10.13%3.64M shares | – | Dec 31, 2024 | SEC |
| Feb 14, 202510:00 AM ET | HGC Investment Management Inc. | 13G | 8.61%2.48M shares | New | Dec 31, 2024 | SEC |
| Feb 10, 20257:10 PM ET | MMCAP International Inc. SPCand 1 other | 13G/A | 7.22%2.08M shares | – | Dec 31, 2024 | SEC |
| Nov 13, 202410:31 AM ET | Barclays PLC | 13G | 5.16%1.49M shares | New | Sep 30, 2024 | SEC |
| Oct 17, 20243:02 PM ET | Picton Mahoney Asset Management | 13G | 6.52%1.88M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell GP-Act III Acquisition Corp. shares.
No Form 144 notices for GP-Act III Acquisition Corp. are on file.