Alpha Partners Technology Merger Corp.
Alpha Partners Technology Merger Corp. (APTMU) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · APTMU · as of Mar 31, 2025
Ownership Breakdown
1
Institutional Holders
▼ 4 vs Q4
$16,837
Total Inst. Value
▼ $156,639 vs Q4
22.94M
Shares Outstanding
freeFloat 0.00%
99,042
13F Shares Held
▼ 21,175 vs Q4
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
APTMU largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 5 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
CROSSINGBRIDGE ADVISORS, LLC blank checks | 99.0K | 42.83% | 42.83% | $16.84M | May 14, 2025 | — held |
DUPONT CAPITAL MANAGEMENT CORP blank checks | 0 | 0.00% | 0.00% | $0 | Apr 22, 2025 | EXIT |
JNBA FINANCIAL ADVISORS blank checks | 0 | 0.00% | 0.00% | $0 | Apr 25, 2025 | EXIT |
CLEAR STREET LLC blank checks | 0 | 0.00% | 0.00% | $0 | May 15, 2025 | EXIT |
BLUE OWL CAPITAL HOLDINGS LP blank checks | 0 | 0.00% | 0.00% | $0 | May 15, 2025 | EXIT |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
0
Increased
+0 shares0
New Positions
first time holders0
Decreased
−0 shares4
Sold Out
fully exitedNet shares change (top 50)
+0
+0 / −0
Net new holders
-4
0 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
APTMU 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. (APTMU) is primarily owned by institutional investors, who hold approximately 0.4% of total shares outstanding. Company insiders own approximately 100.00%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Alpha Partners Technology Merger Corp. is CROSSINGBRIDGE ADVISORS, LLC, holding approximately 99,042 shares — equal to 42.83% of outstanding shares — as of March 31, 2025.
A total of 1 institutional investors currently hold APTMU stock, with a combined institutional value of approximately $16,837 as of the most recent 13F filing period.
Frequently asked questions
APTMU ownershipAlpha Partners Technology Merger Corp. (APTMU) is primarily owned by institutional investors, who hold approximately 0.4% of shares. The largest shareholder is CROSSINGBRIDGE ADVISORS, LLC with a 42.83% stake. Company insiders hold 100.00%. Data sourced from SEC Form 13F as of March 31, 2025.