Harvard Bioscience, Inc. (HBIO) Insider Trading

Last 12 months

Insiders bought $202k on the open market and sold nothing.

Net open-market

+$202k

4 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

4 / 0

executives and directors

Last open-market buy

Mar 2026

Mar 17, 2026

Get an email when HBIO's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Mar 17	Stephen J Denelsky Director	Bought	10,000	$4.87	$49k	91%	Form 4
Mar 16 – 17	William Snider Director	Bought 2 parts	21,000	$4.93 average	$104k	191%	Form 4
Mar 16	Mark T Frost Chief Financial Officer	Bought	5,000	$5.00	$25k	40%	Form 4
Mar 16	John D Duke Chief Executive Officer	Bought	5,000	$5.01	$25k	5.0%	Form 4

Mar 17
Stephen J Denelsky
Director · bought 10,000 at $4.87
$49k
91% of stake
Mar 16 – 17
William Snider
Director · bought 21,000 at avg $4.93
$104k
191% of stake
Mar 16
Mark T Frost
Chief Financial Officer · bought 5,000 at $5.00
$25k
40% of stake
Mar 16
John D Duke
Chief Executive Officer · bought 5,000 at $5.01
$25k
5.0% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch HBIO, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Related stocks: Laboratory Analytical Instruments

MASS908 Devices Inc.

RPIDRapid Micro Biosystems, Inc.

BNGOBionano Genomics Inc.

PRPOPrecipio Inc.

QTRXQuanterix Corporation

PACBPacific Biosciences of California, Inc.

SEERSeer, Inc.

LCTCLifeloc Technologies Inc.

Spot a number that looks wrong? Check it in HBIO's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

2 of 2 free stocks used today

Keep analysing HBIO

Create a free account and get 14 days of Premium: every stock and every tool.

Unlimited stocksQuality, fair value and dividends for 10,000+ stocks
Stock screenerFilter on quality, valuation and dividend safety
Portfolio trackerReal return, dividend calendar and portfolio quality
Editable DCFChange the assumptions and watch fair value move
Compare side by sideUp to 10 stocks in one table
Unlimited alertsPrice, P/E, Quality Score and yield

No card. Moves to Free after, unless you upgrade.

Already have an account?

Or come back tomorrow. Stocks on your watchlist are always free to view.