Question 1

Who are the insiders buying HARVARD BIOSCIENCE INC stock?

Accepted Answer

InsiderAct tracks all open-market purchases of HARVARD BIOSCIENCE INC stock by corporate insiders — including officers, directors, and shareholders owning more than 10% — sourced from public SEC Form 4 filings.

Question 2

What does insider buying at a company mean?

Accepted Answer

When a corporate officer, director, or major shareholder purchases their own company's stock on the open market using personal funds, it signals confidence in the company's outlook. This is especially meaningful when multiple insiders buy within the same 7–14 day window (cluster buying) or when the purchase size exceeds $100,000.

Question 3

How do I find cluster buying signals for a company?

Accepted Answer

InsiderAct automatically detects cluster buying — two or more insiders independently purchasing shares within a 14-day window. When a cluster buy signal is active for a company, it appears prominently on the company's InsiderAct page and on the Signals tab.

Question 4

Has HARVARD BIOSCIENCE INC had any recent large insider purchases?

Accepted Answer

InsiderAct tracks all open-market purchases of $100,000 or more at HARVARD BIOSCIENCE INC. Large insider purchases are flagged as high-conviction signals because they represent meaningful personal capital commitments by executives or directors who have direct visibility into the company's operations and prospects.

Question 5

Where do the insider transactions on this page come from?

Accepted Answer

All transactions shown on InsiderAct company pages are sourced directly from SEC EDGAR Form 4 filings — the mandatory public disclosures that corporate insiders must submit within 2 business days of any stock transaction. InsiderAct ingests these filings in near real time and filters for open-market purchases and sales.

								1WStock price change 1 week after insider bought. Small number below shows return vs S&P 500.	1MStock price change 1 month after insider bought.
2026-04-01	2026-03-20	Frost Mark T	CFO	Award	30,000	$0.00	$0	N/A	N/A
2026-04-01	2026-03-16	Frost Mark T	CFO	Purchase	5,000	$5.00	$25,000	+6.8%	+14.8%
2026-03-23	2026-03-20	Duke John D	CEO	Award	75,000	$0.00	$0	N/A	N/A
2026-03-18	2026-03-17	Denelsky Stephen J	Director	Purchase	10,000	$4.87	$48,700	+5.3%	+21.4%
2026-03-18	2026-03-16	Snider William	Director	Purchase	12,525	$4.99	$62,500	+7.0%	+15.0%
2026-03-18	2026-03-17	Snider William	Director	Purchase	8,475	$4.85	$41,104	+5.8%	+21.9%
2026-03-17	2026-03-16	Duke John D	CEO	Purchase	5,000	$5.01	$25,050	+6.6%	+14.6%
2025-12-30	2025-12-17	Snider William	Director	Award	110,000	$0.00	$0	N/A	N/A
2025-10-07	2025-09-05	Denelsky Stephen J	Director	Award	110,000	$0.00	$0	N/A	N/A
2025-08-19	2025-08-15	Green James W	Director	Disposition	66,036	$0.00	$0	N/A	N/A

HBIO

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