Figures computed from official regulatory filings — .
Ownershipinsiders 32.14% · institutions 39.08%
In USD · as of Oct 5, 2026
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Ironstone Properties, Inc. does not have significant operations. It focuses on seeking appropriate business combination opportunities. The company was formerly known as Ironstone Group, Inc. and changed its name to Ironstone Properties, Inc. in September 2021. Ironstone Properties, Inc. was incorporated in 1972 and is based in San Francisco, California.
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
9 buys6 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| HAMBRECHT WILLIAM Rtrack record | Award | $824.3K | Unusual size |
| Bradley Harold S | Award | $200K | SEC |
| HAMBRECHT ELIZABETH BOYERtrack record | Buy | $100K | conv 62 | SEC |
| HAMBRECHT ELIZABETH BOYERtrack record | Buy | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | conv 56First in 12mo | SEC |
| Thurston Thomas | Buy | $10.5K | conv 20 | SEC |
| Thurston Thomas | Buy | $650 | conv 18 | SEC |
| Thurston Thomas | Buy | $10K | conv 31First in 12mo | SEC |
| HAMBRECHT ELIZABETH BOYERtrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| HAMBRECHT ELIZABETH BOYERtrack record | Buy | $100K | conv 62 | SEC |
| HAMBRECHT WILLIAM Rtrack record | Gift | n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise)) | SEC |
| HAMBRECHT WILLIAM Rtrack record | Buy | $339.3K | conv 98Unusual sizeFirst in 12mo | SEC |
| HAMBRECHT WILLIAM Rtrack record | Buy | $11.8K | conv 23 | SEC |
| HAMBRECHT WILLIAM Rtrack record | Buy | $89.9K | conv 49First in 12mo | SEC |
| HAMQUIST | Sell | $1.8K | SEC |
| VENTURE ASSOCIATES BVI LTD | Sell | $161.7K | SEC |
| H&Q VENTURES IV | Sell | $92.4K | Unusual size | SEC |
| J P MORGAN SECURITIES INC | Sell | $2.6K | SEC |
| HAMBRECHT & QUIST CALIFORNIA | Sell | $173.3K | Unusual size | SEC |
| HAMBRECHT & QUIST VENTURE PARTNERS | Sell | $90.2K | Unusual size | SEC |