MarketPeel
Insider Trading Intelligence
JD

John D. Duke

HBIO
CHIEF EXECUTIVE OFFICER · HARVARD BIOSCIENCE INC · CIK 0002071593
FILING MIX · LIFETIME100%/0%
BUYS
4
SELLS
0
TOTAL VALUE
$25.1K
COMPANIES
1
ACTIVE SINCE
Aug 2025
HOLDINGS NOW
180,000
AVG SELL PX
TRADE KIND
SHOWING 4 / 4
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by John D. Duke, 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 · 180,000 shares · as of Mar 20, 2026
0250,000500,000750,0001,000,0002026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2025
2025
2026
FLOW · 4 buys / 0 sellsCOVERAGE · 3 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
HBIO
HARVARD BIOSCIENCE INC
PURCHASEGRANT
Stock grant
75,000180,000Mar 20, 2026Mar 23, 2026View →
HBIO
HARVARD BIOSCIENCE INC
PURCHASE
Chief Executive Officer
5,000$5.01$25.1K105,000Mar 16, 2026Mar 17, 2026View →
HBIO
HARVARD BIOSCIENCE INC
PURCHASEGRANT
Stock grant
500,000500,000Aug 8, 2025Aug 11, 2025View →
HBIO
HARVARD BIOSCIENCE INC
PURCHASEGRANT
Stock grant
500,0001,000,000Aug 8, 2025Aug 11, 2025View →
Other insiders · HBIO
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About this filer
CIK 0002071593
ROLE
Chief Executive Officer
PRIMARY
HBIO
COMPANIES
1
ACTIVE SINCE
Aug 2025
MARKETPEEL · /INSIDER/0002071593DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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