Plum Acquisition Corp. IV
Plum Acquisition Corp. IV (PLMK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PLMK · as of Sep 30, 2025
Ownership Breakdown
42
Institutional Holders
$170.94M
Total Inst. Value
▲ $3.01M vs Q2
24.24M
Shares Outstanding
freeFloat 96.92%
16.57M
13F Shares Held
▲ 136,170 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PLMK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
WESTCHESTER CAPITAL MANAGEMENT, LLC blank checks | 1.23M | 5.05% | 5.05% | $12.65B | Nov 14, 2025 | — held |
AQR ARBITRAGE LLC blank checks | 960.4K | 3.96% | 3.96% | $9.92B | Nov 14, 2025 | — held |
HUDSON BAY CAPITAL MANAGEMENT LP blank checks | 850.0K | 3.51% | 3.51% | $8.77B | Dec 15, 2025 | — held |
GLAZER CAPITAL, LLC blank checks | 770.2K | 3.18% | 3.18% | $7.95B | Nov 13, 2025 | — held |
BERKLEY W R CORP blank checks | 768.9K | 3.17% | 3.17% | $7.93B | Nov 14, 2025 | — held |
LINDEN ADVISORS LP blank checks | 700.0K | 2.89% | 2.89% | $7.22B | Nov 14, 2025 | — held |
D. E. SHAW & CO., INC. blank checks | 700.0K | 2.89% | 2.89% | $7.22B | Nov 14, 2025 | ▲ 50.0K |
CONTEXT CAPITAL MANAGEMENT, LLC blank checks | 700.0K | 2.89% | 2.89% | $7.22B | Nov 12, 2025 | — held |
TENOR CAPITAL MANAGEMENT CO., L.P. blank checks | 700.0K | 2.89% | 2.89% | $7.22B | Nov 14, 2025 | — held |
KARPUS MANAGEMENT, INC. blank checks | 677.7K | 2.80% | 2.80% | $6.99B | Nov 14, 2025 | ▼ 7.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
6
Increased
+288.0K shares2
New Positions
first time holders8
Decreased
−292.6K shares2
Sold Out
fully exitedNet shares change (top 50)
4.7K
+288.0K / −292.6K
Net new holders
-2
2 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PLMK insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Plum Acquisition Corp. IV (PLMK) is primarily owned by institutional investors, who hold approximately 68.3% of total shares outstanding. Company insiders own approximately 3.08%, while retail and public investors account for the remaining 28.59%.
The largest institutional shareholder of Plum Acquisition Corp. IV is WESTCHESTER CAPITAL MANAGEMENT, LLC, holding approximately 1.23 million shares — equal to 5.05% of outstanding shares — as of September 30, 2025.
A total of 42 institutional investors currently hold PLMK stock, with a combined institutional value of approximately $170,940,845 as of the most recent 13F filing period.
Frequently asked questions
PLMK ownershipPlum Acquisition Corp. IV (PLMK) is primarily owned by institutional investors, who hold approximately 68.3% of shares. The largest shareholder is WESTCHESTER CAPITAL MANAGEMENT, LLC with a 5.05% stake. Company insiders hold 3.08%. Data sourced from SEC Form 13F as of September 30, 2025.