HBIO insider buying
1 cluster buyHARVARD BIOSCIENCE INC · Healthcare
When two or more insiders at HARVARD BIOSCIENCE INC buy HBIO on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in HBIO plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Mar 16 – Mar 17, 2026Detected Mar 17, 2026High conviction4 insidersTotal bought$202.4KMarket cap$28.6M
All notable open-market buys in HBIO
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 17, 2026 | DENELSKY STEPHEN Jcluster Director | 10,000 | $4.87 | $48.7K | SEC ↗ |
| Mar 17, 2026 | Snider Williamcluster Director | 8,475 | $4.85 | $41.1K | SEC ↗ |
| Mar 16, 2026 | Snider Williamcluster Director | 12,525 | $4.99 | $62.5K | SEC ↗ |
| Mar 16, 2026 | Duke John Dcluster Director, Chief Executive Officer | 5,000 | $5.01 | $25.1K | SEC ↗ |
| Mar 16, 2026 | Frost Mark Tcluster Chief Financial Officer | 5,000 | $5.00 | $25.0K | SEC ↗ |
| Jun 13, 2024 | Director, Chief Executive Officer | 10,000 | $2.91 | $29.1K | SEC ↗ |
| Jun 6, 2024 | Director, Chief Executive Officer | 20,000 | $3.07 | $61.4K | SEC ↗ |
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HBIO insider buying — FAQ
- Are insiders buying HBIO stock?
- Yes — 5 distinct insiders have bought HBIO (HARVARD BIOSCIENCE INC) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Apr 1, 2026.
- How much HBIO stock have insiders bought?
- Insiders have bought a combined $292.9K of HBIO across 7 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in HBIO?
- A cluster buy is two or more distinct HARVARD BIOSCIENCE INC insiders — officers, directors, or 10% owners — each buying HBIO on the open market within a rolling window. HBIO has 1 detected cluster buy to date.
- Where does this HBIO insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in HBIO
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy HBIO within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding HBIO.