AmBase Corporation
AmBase Corporation (ABCP) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ABCP · as of Mar 31, 2025
Ownership Breakdown
1
Institutional Holders
$7,951
Total Inst. Value
▼ $369 vs Q4
84.94M
Shares Outstanding
freeFloat 27.57%
26,000
13F Shares Held
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
ABCP largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 1 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
KINGSWOOD WEALTH ADVISORS, LLC opeators of nonresidential buildings | 26.0K | 3.06% | 3.06% | $7.95M | Jul 25, 2025 | — held |
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 shares0
Sold Out
fully exitedNet shares change (top 50)
+0
+0 / −0
Net new holders
+0
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ABCP 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.
1
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Barc Investments LLC 10 percent owner | Apr 30, 2024 | Purchase | 909,691 | $0.21 | $191.0K | 59.86M | Form 4 ↗ |
Barc Investments LLC 10 percent owner | Feb 28, 2024 | Purchase | 44,200,460 | $0.20 | $8.84M | 60.20M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Feb 15, 2024 | Sale | 383,116 | $0.25 | $94.5K | 7.02M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Feb 16, 2024 | Sale | 1,693,021 | $0.25 | $416.5K | 5.33M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Feb 20, 2024 | Sale | 1,102,170 | $0.22 | $243.6K | 4.23M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Oct 9, 2023 | Sale | 50,000 | $0.15 | $7.5K | 7.41M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Sep 22, 2023 | Sale | 70,000 | $0.16 | $10.9K | 7.46M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Sep 8, 2023 | Sale | 50,000 | $0.15 | $7.5K | 7.53M | Form 4 ↗ |
Camac Fund, LP 10 percent owner | Aug 25, 2023 | Sale | 100,000 | $0.15 | $15.0K | 7.58M | Form 4 ↗ |
BIANCO RICHARD A CEO | Aug 1, 2023 | Gift | 700,000 | — | — | 1.42M | 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
AmBase Corporation (ABCP) is primarily owned by institutional investors, who hold approximately 0.0% of total shares outstanding. Company insiders own approximately 72.43%, while retail and public investors account for the remaining 27.54%.
The largest institutional shareholder of AmBase Corporation is KINGSWOOD WEALTH ADVISORS, LLC, holding approximately 26,000 shares — equal to 3.06% of outstanding shares — as of March 31, 2025.
A total of 1 institutional investors currently hold ABCP stock, with a combined institutional value of approximately $7,951 as of the most recent 13F filing period.
Frequently asked questions
ABCP ownershipAmBase Corporation (ABCP) is primarily owned by institutional investors, who hold approximately 0.0% of shares. The largest shareholder is KINGSWOOD WEALTH ADVISORS, LLC with a 3.06% stake. Company insiders hold 72.43%. Data sourced from SEC Form 13F as of March 31, 2025.