Insider · CIK 0001310262
Mark T Frost
Files at HBIO (HARVARD BIOSCIENCE INC). First filing Apr 1, 2026, latest Apr 1, 2026.
In brief
Mark T Frost files SEC Form 4 as CFO at HBIO (HARVARD BIOSCIENCE INC). Since Apr 1, 2026, Mark T Frost has reported 1 open-market buy worth $25k and 0 open-market sells worth $0, the latest filed on Apr 1, 2026.
A track record needs three past buys with six months of prices behind them; Mark T Frost has 0, so none is measured yet.
The newest scored trade: bought $25k of HBIO on Mar 16, 2026, filed Apr 1, 2026, scored 56 (moderate). In the last 12 months: 1 buy worth $25k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
HBIO: HARVARD BIOSCIENCE INC
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 56Moderate | HARVARD BIOSCIENCE INC | $25k 5,000 shares | +40% | +79% from low-37% from high |
Transactions
Every row this insider has filed, 3 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Mar 20, 2026 | HBIO HARVARD BIOSCIENCE INC | AGrant or award Common Stock | +30,000 | $0.00 | $0 | 47,500 | Apr 1, 2026 |
| Mar 16, 2026 | HBIO HARVARD BIOSCIENCE INC | POpen-market purchase Common Stock | +5,000 | $5.00 | $25k | 17,500 | Apr 1, 2026 |
| May 12, 2025 | HBIO HARVARD BIOSCIENCE INC | AGrant or award Common Stock | +100,000 | $0.00 | $0 | 125,000 | May 14, 2025 |
Questions about Mark T Frost
Answered from the filings on this page, as of the latest one.
Is Mark T Frost buying or selling?
In the last 12 months Mark T Frost reported 1 open-market buy worth $25k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $25k of HBIO on Mar 16, 2026. Grants, option exercises and tax withholding are not counted.
How did Mark T Frost's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Mark T Frost has 0.
Where does Mark T Frost file Form 4?
Mark T Frost has filed Form 4 at HBIO (HARVARD BIOSCIENCE INC) as Chief Financial Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.