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Total declarations
Company
▲ Purchases (1 ops.)
▼ Sales (0 ops.)
Latest filing published 23 Mar 2026 for HARVARD BIOSCIENCE INC. Read the official filing
Filing timeline
BuySaleJohn D. Duke
Insider track record
Disclosed buys
1
Disclosed sells
0
Signal history
No signal scores available.
Closed purchases
Market purchases
1
Not enough history yet: 1 closed purchase, at least 2 are needed.
Purchases by company
Since each purchase
- +21.9%Entry US$4.88 · Close at T+90 US$5.95
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
John D. Duke: trading record in brief
All filings by John D. Duke on record concern Harvard Bioscience Inc. Between 8 August 2025 and 20 March 2026, the trades on record add up to 3 filings.
Every open-market trade on record is a purchase: 1 purchase worth €22k, and no sale. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Other entries cover 2 share grants. So far in 2026, the count stands at 1 purchase and no sales.
The newest entry dates from 23 March 2026: a share grant, in Harvard Bioscience Inc. The last purchase on record was published on 17 March 2026, which is 218 days ago. The median gap between a trade and its publication by SEC (Form 4) is 3 days. Section 16 rules allow two business days to file each Form 4. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Companies and markets linked to John D. Duke
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Declarations3 total
75,000 shares0Common StockSEC:0001171843-26-001843:0
5,000 shares@ US$5.01100.0% of flowCommon StockSEC:0001171843-26-001645:0
Canonical exit: 14 Jun 2026 (T+90)
500,000 shares0Common StockSEC:0001104659-25-076302:0
3 of 3 declarations
