Insider Ledger
HBIO insider buying and SEC filings, explained
Harvard Bioscience Inc. · CIK 1123494
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Laboratory Analytical Instruments
- State of incorporation
- DE
- Fiscal year end
- Dec 31
Insider activity in the last 12 months
Bought
$202K
Insiders who bought
4
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Mar 16, 2026 | Purchase (code P) | Mark T Frost (CFO) bought 5,000 shares at $5.00 ($25K), reported as a purchase (code P). Holdings up 40% to 17,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 1, 2026 |
| Mar 17, 2026 | Purchase (code P) | Stephen J. Denelsky (Director) bought 10,000 shares at $4.87 ($49K), reported as a purchase (code P). Holdings up 91% to 21,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 18, 2026 |
| Mar 16–17, 2026 | Purchase (code P) | William Snider (Director) bought 21,000 shares between Mar 16 and Mar 17 at about $4.93 ($104K), reported as a purchase (code P). Holdings up 191% to 32,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 18, 2026 |
| Mar 16, 2026 | Purchase (code P) | John D Duke (CEO and Director) bought 5,000 shares at $5.01 ($25K), reported as a purchase (code P). Holdings up 5% to 105,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 17, 2026 |
8 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
4 insiders bought in 30 days
$202K in purchases since Mar 16, 2026 · Purchases traded Mar 16, 2026 to Mar 17, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| John D Duke (CEO) | $25K | Mar 16, 2026 | SEC filing |
| Mark T Frost (CFO) | $25K | Mar 16, 2026 | SEC filing |
| William Snider (Director) | $104K | Mar 17, 2026 | SEC filing |
| Stephen J. Denelsky (Director) | $49K | Mar 17, 2026 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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