John D. Duke SEC EDGAR Filings (CIK 0002071593)

SEC EDGAR filings, ownership reports, and insider transactions for John D. Duke.

Business address
C/O Harvard Bioscience, Inc., 84 October Hill Road, Holliston, MA, 01746
Top holdings (ownership)
HBIO
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John D. Duke has filed 2 SEC EDGAR filings since 09 Jun 2025

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing OWNERSHIP DOCUMENT 11 Aug 2025 08 Aug 2025 001-33957
3 Open Document Open Filing OWNERSHIP DOCUMENT 09 Jun 2025 02 Jun 2025 001-33957