Alpha Partners Technology Merger Corp.
Alpha Partners Technology Merger Corp. (APTM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · APTM · as of Dec 31, 2024
Ownership Breakdown
17
Institutional Holders
$21.02M
Total Inst. Value
▼ $1.32M vs Q3
22.64M
Shares Outstanding
freeFloat 54.31%
1.89M
13F Shares Held
▼ 161,630 vs Q3
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
APTM largest shareholders · institutional ownership
Q4 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
AQR ARBITRAGE LLC blank checks | 280.0K | 71.57% | 71.57% | $3.11B | Feb 14, 2025 | — held |
METEORA CAPITAL, LLC blank checks | 220.0K | 56.24% | 56.24% | $2.45B | Feb 14, 2025 | ▼ 47.4K |
BERKLEY W R CORP blank checks | 204.4K | 52.24% | 52.24% | $2.27B | Feb 14, 2025 | — held |
QUARRY LP blank checks | 179.1K | 45.79% | 45.79% | $1.99B | Feb 14, 2025 | — held |
LOGAN STONE CAPITAL, LLC blank checks | 155.5K | 39.76% | 39.76% | $1.73B | Feb 14, 2025 | — held |
WEALTHSPRING CAPITAL LLC blank checks | 131.7K | 33.68% | 33.68% | $1.46B | Feb 5, 2025 | — held |
K2 PRINCIPAL FUND, L.P. blank checks | 94.4K | 24.12% | 24.12% | $1.05B | Feb 14, 2025 | ▼ 15.6K |
SANDIA INVESTMENT MANAGEMENT LP blank checks | 79.1K | 20.23% | 20.23% | $880.07M | Feb 14, 2025 | — held |
CROSSINGBRIDGE ADVISORS, LLC blank checks | 50.0K | 12.78% | 12.78% | $556.00M | Feb 14, 2025 | NEW |
MIZUHO SECURITIES USA LLC blank checks | 50.0K | 12.78% | 12.78% | $550.00M | Feb 11, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q4 2024 vs prior quarter
Q4 2024
2
Increased
+250 shares3
New Positions
first time holders4
Decreased
−96.2K shares4
Sold Out
fully exitedNet shares change (top 50)
96.0K
+250 / −96.2K
Net new holders
-3
3 new / 4 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
APTM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Aug 9, 2006 | Sale | 28,101 | $7.73 | $217.1K | 642.4K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Aug 9, 2006 | Sale | 15,500 | $8.10 | $125.6K | 626.9K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | May 15, 2006 | Sale | 46,935 | $5.94 | $278.8K | 670.5K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | May 11, 2006 | Sale | 2,000 | $6.00 | $12.0K | 717.4K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | May 5, 2006 | Sale | 2,000 | $6.50 | $13.0K | 719.4K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Mar 29, 2006 | Sale | 2,900 | $6.63 | $19.2K | 721.4K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Mar 29, 2006 | Sale | 2,900 | $6.63 | $19.2K | 721.4K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Mar 14, 2006 | Purchase | 3,000 | $4.70 | $14.1K | 724.3K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Sep 10, 2004 | Sale | 10,000 | $13.82 | $138.2K | 540.5K | Form 4 ↗ |
MARXE AUSTIN W & GREENHOUSE DAVID M 10 percent owner | Jan 7, 2004 | Purchase | 3,500 | $4.09 | $14.3K | 541.3K | Form 4 ↗ |
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
Alpha Partners Technology Merger Corp. (APTM) is primarily owned by institutional investors, who hold approximately 8.3% of total shares outstanding. Company insiders own approximately 45.69%, while retail and public investors account for the remaining 45.96%.
The largest institutional shareholder of Alpha Partners Technology Merger Corp. is AQR ARBITRAGE LLC, holding approximately 280,000 shares — equal to 71.57% of outstanding shares — as of December 31, 2024.
A total of 17 institutional investors currently hold APTM stock, with a combined institutional value of approximately $21,025,000 as of the most recent 13F filing period.
Frequently asked questions
APTM ownershipAlpha Partners Technology Merger Corp. (APTM) is primarily owned by institutional investors, who hold approximately 8.3% of shares. The largest shareholder is AQR ARBITRAGE LLC with a 71.57% stake. Company insiders hold 45.69%. Data sourced from SEC Form 13F as of December 31, 2024.