Mark T Frost insider trades: Harvard Bioscience (HBIO) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
Open-market buys and sales
5 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 16, 2026 | HBIO | ↑ Buy | 5,000 | $5.00 | $25K | Direct | Apr 1, 2026 (16d) |
| Mar 8, 2023 | FATH | ↓ Sell | 5,672 | $1.20 | $7K | Direct | Mar 10, 2023 (2d) |
| Dec 1, 2011 | AMRI | ↑ Buy | 10,000 | $2.26 | $23K | Direct | Dec 2, 2011 (1d) |
| Nov 9, 2007 | AMRI | ↑ Buy | 2,500 | $12.18 | $30K | Direct | Nov 9, 2007 (0d) |
| Jun 9, 2006 | AMRI | ↑ Buy | 2,500 | $10.45 | $26K | Direct | Jun 13, 2006 (4d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other HBIO insiders
Open-market trades in the last 12 months
About Mark T Frost's insider trades
Mark T Frost is Chief Financial Officer at Harvard Bioscience (HBIO). Since Jun 9, 2006, Mark has reported 4 open-market purchases worth $104K and 1 sale worth $7K on SEC Form 4. In the last 12 months: 1 buy ($25K).
Their filings also include grants and awards (18 filings), shares withheld for taxes (8 filings), shares returned to the company (2 filings), option exercises (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every HBIO insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.