Figures computed from official regulatory filings — .
Ownershipinsiders 72.43% · institutions 0.12%
In USD · as of Oct 5, 2026
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AmBase Corporation does not have significant operations. Previously, the company invested in a real estate development property. The company was incorporated in 1975 and is headquartered in Coral Springs, Florida.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
81 buys40 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Barc Investments LLC | Buy | $191K | conv 26 | SEC |
| Barc Investments LLC | Buy | $8.8M | conv 61First in 12mo | SEC |
| Camac Fund, LPtrack record | Sell | $95.8K | SEC |
| Camac Fund, LPtrack record | Sell | $242.5K | SEC |
| Camac Fund, LPtrack record | Sell | $423.3K | Unusual size | SEC |
| Camac Fund, LPtrack record | Sell | $7.5K | SEC |
| Camac Fund, LPtrack record | Sell | $11.2K | SEC |
| Camac Fund, LPtrack record | Sell | $7.5K | SEC |
| Camac Fund, LPtrack record | Sell | $15K | SEC |
| BIANCO RICHARD Atrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| BIANCO RICHARD Atrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| Camac Fund, LPtrack record | Sell | $30.4K | SEC |
| Camac Fund, LPtrack record | Sell | $1.8K | SEC |
| Camac Fund, LPtrack record | Sell | $15K | SEC |
| Camac Fund, LPtrack record | Sell | $2.3K | SEC |
| BIANCO RICHARD Atrack record | Buy | $55.5B | conv 84Unusual sizeFirst in 12mo | SEC |
| Camac Fund, LPtrack record | Sell | $100K | SEC |
| Camac Fund, LPtrack record | Sell | $1.2K | SEC |
| Camac Fund, LPtrack record | Sell | $1.1K | SEC |
| Camac Fund, LPtrack record | Sell | $2K | SEC |
| Camac Fund, LPtrack record | Sell | $5K | SEC |
| Camac Fund, LPtrack record | Sell | $500 | SEC |
| Camac Fund, LPtrack record | Sell | $8.8K | SEC |
| Camac Fund, LPtrack record | Sell | $36K | SEC |
| BIANCO RICHARD Atrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |