HBIO

Harvard Bioscience, Inc.$6.31-0.33 (-4.97%)

Prev Close$6.64·MCap$21.7M·P/E—·Vol27.2K·Yield—

▲

Buys (12M)

$98.8K

▼

Sells (12M)

$23.7K

◆

Net Activity

Net Buyer

$75.1K

●

Active Insiders

last 12 mo

Over the past 12 months, insider activity at Harvard Bioscience, Inc. (HBIO) has been dominated by buying, with 3 insider purchases totaling $98.8K and 1 insider sale totaling $23.7K. The most recent insider transaction was by Frost Mark T (officer: Chief Financial Officer), who purchased $25.0K worth of shares on Apr 1, 2026. Harvard Bioscience, Inc. operates in the Healthcare sector, within the Medical - Instruments & Supplies industry, with a market cap of $21.7M.

HBIO Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Apr 1, 2026	Frost Mark T	officer: Chief Financial Officer	Buy	5,000	$5.00	$25.0K	17,500+40%
Mar 18, 2026	DENELSKY STEPHEN J	director	Buy	10,000	$4.87	$48.7K	21,000+91%
Mar 17, 2026	Duke John D	director, officer: Chief Executive Officer	Buy	5,000	$5.01	$25.1K	105,000
Aug 15, 2025	Green James W	Director	Sell	44,740	$0.53	$23.7K1.0% OS	0
Mar 19, 2025	Cote Jennifer	Chief Financial Officer	Sell	5,687	$0.69	$3.9K	0
Mar 19, 2025	Green James W	Chief Executive Officer	Sell	38,413	$0.69	$26.5K0.9% OS	0
Jun 14, 2024	Green James W	Chief Executive Officer	Buy	10,000	$2.91	$29.1K	3,111,091
Jun 7, 2024	Green James W	Chief Executive Officer	Buy	20,000	$3.07	$61.4K	3,101,091
Aug 21, 2023	Green James W	Chief Executive Officer	Buy	25,000	$4.38	$109.5K0.6% OS	2,862,679
Mar 16, 2023	EDRICK ALAN I	Director	Buy	30,000	$2.64	$79.3K0.7% OS	202,485
Mar 15, 2023	Green James W	Chief Executive Officer	Buy	40,000	$2.64	$105.4K0.9% OS	2,886,052
Dec 2, 2022	Green James W	Chief Executive Officer	Buy	30,000	$2.51	$75.3K0.7% OS	2,278,811
Aug 29, 2022	LOY BERTRAND	Director	Buy	9,291	$3.41	$31.7K	399,651
Aug 26, 2022	LOY BERTRAND	Director	Buy	25,535	$3.27	$83.4K0.6% OS	390,360
Aug 24, 2022	LOY BERTRAND	Director	Buy	13,857	$3.21	$44.4K	364,825
Aug 22, 2022	LOY BERTRAND	Director	Buy	10,759	$3.27	$35.2K	350,968
Aug 18, 2022	Green James W	Chief Executive Officer	Buy	40,000	$3.19	$127.6K0.9% OS	2,248,811
Jun 17, 2022	Green James W	Chief Executive Officer	Buy	30,000	$3.71	$111.3K0.7% OS	2,301,582
May 10, 2022	Green James W	Chief Executive Officer	Buy	40,000	$3.69	$147.4K0.9% OS	2,319,955
Aug 25, 2021	Green James W	Chief Executive Officer	Sell	48,175	$8.02	$386.4K1.1% OS	2,091,725
May 25, 2021	Green James W	Chief Executive Officer	Sell	24,312	$7.14	$173.6K0.5% OS	2,279,778
May 21, 2021	Green James W	Chief Executive Officer	Sell	54,064	$7.13	$385.6K1.2% OS	2,279,778
May 19, 2021	Green James W	Chief Executive Officer	Sell	39,188	$7.41	$290.4K0.9% OS	2,279,788
Mar 16, 2021	Green James W	Chief Executive Officer	Sell	35,000	$5.98	$209.3K0.8% OS	2,279,778

HBIO Insider Buying Activity

The following table shows recent insider purchases of Harvard Bioscience, Inc. (HBIO) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Apr 1, 2026	Frost Mark T	officer: Chief Financial Officer	Buy	5,000	$5.00	$25.0K	17,500+40%
Mar 18, 2026	DENELSKY STEPHEN J	director	Buy	10,000	$4.87	$48.7K	21,000+91%
Mar 17, 2026	Duke John D	director, officer: Chief Executive Officer	Buy	5,000	$5.01	$25.1K	105,000
Jun 14, 2024	Green James W	Chief Executive Officer	Buy	10,000	$2.91	$29.1K	3,111,091
Jun 7, 2024	Green James W	Chief Executive Officer	Buy	20,000	$3.07	$61.4K	3,101,091
Aug 21, 2023	Green James W	Chief Executive Officer	Buy	25,000	$4.38	$109.5K0.6% OS	2,862,679
Mar 16, 2023	EDRICK ALAN I	Director	Buy	30,000	$2.64	$79.3K0.7% OS	202,485
Mar 15, 2023	Green James W	Chief Executive Officer	Buy	40,000	$2.64	$105.4K0.9% OS	2,886,052
Dec 2, 2022	Green James W	Chief Executive Officer	Buy	30,000	$2.51	$75.3K0.7% OS	2,278,811
Aug 29, 2022	LOY BERTRAND	Director	Buy	9,291	$3.41	$31.7K	399,651
Aug 26, 2022	LOY BERTRAND	Director	Buy	25,535	$3.27	$83.4K0.6% OS	390,360
Aug 24, 2022	LOY BERTRAND	Director	Buy	13,857	$3.21	$44.4K	364,825
Aug 22, 2022	LOY BERTRAND	Director	Buy	10,759	$3.27	$35.2K	350,968
Aug 18, 2022	Green James W	Chief Executive Officer	Buy	40,000	$3.19	$127.6K0.9% OS	2,248,811
Jun 17, 2022	Green James W	Chief Executive Officer	Buy	30,000	$3.71	$111.3K0.7% OS	2,301,582
May 10, 2022	Green James W	Chief Executive Officer	Buy	40,000	$3.69	$147.4K0.9% OS	2,319,955

HBIO Insider Selling Activity

The following table shows recent insider sales of Harvard Bioscience, Inc. (HBIO) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Aug 15, 2025	Green James W	Director	Sell	44,740	$0.53	$23.7K1.0% OS	0
Mar 19, 2025	Cote Jennifer	Chief Financial Officer	Sell	5,687	$0.69	$3.9K	0
Mar 19, 2025	Green James W	Chief Executive Officer	Sell	38,413	$0.69	$26.5K0.9% OS	0
Aug 25, 2021	Green James W	Chief Executive Officer	Sell	48,175	$8.02	$386.4K1.1% OS	2,091,725
May 25, 2021	Green James W	Chief Executive Officer	Sell	24,312	$7.14	$173.6K0.5% OS	2,279,778
May 21, 2021	Green James W	Chief Executive Officer	Sell	54,064	$7.13	$385.6K1.2% OS	2,279,778
May 19, 2021	Green James W	Chief Executive Officer	Sell	39,188	$7.41	$290.4K0.9% OS	2,279,788
Mar 16, 2021	Green James W	Chief Executive Officer	Sell	35,000	$5.98	$209.3K0.8% OS	2,279,778