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GROUP ONE TRADING LLC

Position in HBIO — Harvard Bioscience Inc

CIK 932540 CHICAGO, IL

Position in HBIO

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$1,476
-$9,150 QoQ
Shares Held
240
-89.0% QoQ
Ownership
0.005%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#29
of 37 holders
Holding Since
Sep 2021
9 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in HBIO Over Time

Shares Held

Position Value (USD)

Position in Medical Instruments & Supplies

Healthcare · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $15,163,669 across 18 Medical Instruments & Supplies names. HBIO ranks #17 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in HBIO

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9 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $1,476 240
2026-03-31 $10,626 2,182
2025-12-31 $17,093 25,513
2025-09-30 $797 1,813
2025-06-30 $2,117 4,813
2025-03-31 $228 400
2024-12-31 $422 200
2021-12-31 $2,115 300
2021-09-30 $2,094 300