MarketPeel
Insider Trading Intelligence
MF

Mark T. Frost

HBIO
CHIEF FINANCIAL OFFICER · HARVARD BIOSCIENCE INC · CIK 0001310262
FILING MIX · LIFETIME100%/0%
BUYS
3
SELLS
0
TOTAL VALUE
$25.0K
COMPANIES
1
ACTIVE SINCE
May 2025
HOLDINGS NOW
47,500
AVG SELL PX
TRADE KIND
SHOWING 3 / 3
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Mark T. Frost, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d1+100.00%+6.59%-2.04%+8.63%+8.63%
14d1+0.00%-6.99%-5.54%-1.45%-1.45%
30d1+100.00%+14.57%+4.62%+9.95%+9.95%
60d1+100.00%+7.68%+10.95%-3.27%-3.27%
90d1+100.00%+23.75%+10.87%+12.88%+12.88%
180d1(1 pending)
1y1(1 pending)
2y1(1 pending)
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
HBIO · 47,500 shares · as of Mar 20, 2026
031,25062,50093,750125,0002026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2025
2025
2025
2026
FLOW · 3 buys / 0 sellsCOVERAGE · 4 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
HBIO
HARVARD BIOSCIENCE INC
PURCHASEGRANT
Stock grant
30,00047,500Mar 20, 2026Apr 1, 2026View →
HBIO
HARVARD BIOSCIENCE INC
PURCHASE
Chief Financial Officer
5,000$5.00$25.0K17,500Mar 16, 2026Apr 1, 2026View →
HBIO
HARVARD BIOSCIENCE INC
PURCHASEGRANT
Stock grant
100,000125,000May 12, 2025May 14, 2025View →
Other insiders · HBIO
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About this filer
CIK 0001310262
ROLE
Chief Financial Officer
PRIMARY
HBIO
COMPANIES
1
ACTIVE SINCE
May 2025
MARKETPEEL · /INSIDER/0001310262DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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