AmBase Corporation
AmBase Corporation (ABCP) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · ABCP · as of Jun 9, 2026
Activity summary
Buy transactions
2
P-Purchase only
Sell transactions
7
12 Months
Buy/Sell ratio
0.29
Buy/Sell (by trades)
Overall sentiment
AmBase Corporation insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
ABCP insider buying and selling by quarter
ABCP insider selling · ABCP insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Recent insider transactions
ABCP executive sell shares · ABCP board member insider trading · ABCP insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Feb 15, 2024 | Camac Fund, LP 10 percent owner | Sale | 383,116 | $94K | Form 4 |
| Feb 16, 2024 | Camac Fund, LP 10 percent owner | Sale | 1,693,021 | $416K | Form 4 |
| Feb 20, 2024 | Camac Fund, LP 10 percent owner | Sale | 1,102,170 | $244K | Form 4 |
| Oct 9, 2023 | Camac Fund, LP 10 percent owner | Sale | 50,000 | $8K | Form 4 |
| Sep 22, 2023 | Camac Fund, LP 10 percent owner | Sale | 70,000 | $11K | Form 4 |
| Sep 8, 2023 | Camac Fund, LP 10 percent owner | Sale | 50,000 | $8K | Form 4 |
| Aug 25, 2023 | Camac Fund, LP 10 percent owner | Sale | 100,000 | $15K | Form 4 |
| Jun 27, 2023 | Camac Fund, LP 10 percent owner | Sale | 202,500 | $30K | Form 4 |
| Jun 14, 2023 | Camac Fund, LP 10 percent owner | Sale | 12,000 | $2K | Form 4 |
| Jun 12, 2023 | Camac Fund, LP 10 percent owner | Sale | 100,000 | $15K | Form 4 |
| Jun 7, 2023 | Camac Fund, LP 10 percent owner | Sale | 15,000 | $2K | Form 4 |
| May 24, 2023 | Camac Fund, LP 10 percent owner | Sale | 12,000 | $1K | Form 4 |
| May 26, 2023 | Camac Fund, LP 10 percent owner | Sale | 1,000,000 | $100K | Form 4 |
| May 8, 2023 | Camac Fund, LP 10 percent owner | Sale | 10,000 | $1K | Form 4 |
| May 9, 2023 | Camac Fund, LP 10 percent owner | Sale | 20,000 | $2K | Form 4 |
| Jan 27, 2023 | Camac Fund, LP Director | Sale | 50,000 | $5K | Form 4 |
| Dec 27, 2022 | Camac Fund, LP Director | Sale | 5,000 | $500 | Form 4 |
| Dec 23, 2022 | Camac Fund, LP Director | Sale | 80,000 | $9K | Form 4 |
| Jan 5, 2021 | Camac Fund, LP 10 percent owner | Sale | 606,060 | $200K | Form 4 |
| May 20, 2020 | BIANCO RICHARD A President & CEO · Director | Purchase | 100,000 | $18K | Form 4 |
| May 20, 2020 | Carnegie Jerry Y Director | Purchase | 71,898 | $13K | Form 4 |
| Dec 9, 2016 | Bianco Joseph R Treasurer | Purchase | 7,000 | $6K | Form 4 |
| Dec 7, 2016 | Bianco Joseph R Treasurer | Purchase | 9,900 | $9K | Form 4 |
| Dec 7, 2016 | Bianco Joseph R Treasurer | Purchase | 100 | $85 | Form 4 |
Camac Fund, LP
10 percent owner
Date
Feb 16
Shares
1,693,021
Price
$0.25
Value
$416K
Camac Fund, LP
10 percent owner
Date
Feb 20
Shares
1,102,170
Price
$0.22
Value
$244K
Camac Fund, LP
10 percent owner
Date
May 26
Shares
1,000,000
Price
$0.10
Value
$100K
BIANCO RICHARD A
President & CEO · Director
Date
May 20
Shares
100,000
Price
$0.18
Value
$18K
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About ABCP insider trading
ABCP insider trades
AmBase Corporation (ABCP) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including ABCP. Over the past 12 months, 0 insiders have filed transactions with the SEC. ABCP insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For AmBase Corporation's institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
ABCP insider trading · 5 questionsThe insiders of AmBase Corporation (ABCP) include executives and directors such as ABCP, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026