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HBIO HARVARD BIOSCIENCE INC

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CMN (common), issuer CIK 1123494

32 managers (34 13F filers) reported a position in HBIO shares at 2026-03-31, 1,349,601 shares in all. 30 filers opened a position and 0 filers sold out during the quarter.

Managers
32
13F filers
34
New
30
Added
0
Reduced
1
Sold out
0
Shares held by filers
1,349,601

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
WEBER CAPITAL MANAGEMENT LLC /ADV320,037$1.56M1.56%new13F-HRTimeline
VANGUARD GROUP INCgroup of 3 filers holding192,264$936KnewTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC179,614$873K<0.01%new13F-HRTimelineGroup
CORSAIR CAPITAL MANAGEMENT, L.P.124,810$608K0.09%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP114,117$556K<0.01%new13F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC101,427$494K<0.01%new13F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.62,226$303K<0.01%new13F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC59,511$290K<0.01%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC46,332$226K<0.01%new13F-HRTimelineGroup
Williams & Novak Wealth Management, LLC27,052$138K0.1%new13F-HRTimeline
ESSEX INVESTMENT MANAGEMENT CO LLC27,021$132K0.02%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC23,830$116K<0.01%new13F-HRTimelineGroup
RBF Capital, LLC16,000$77.9K<0.01%new13F-HR/ATimeline
STATE STREET CORPin group STATE STREET CORP14,932$72.7K<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp10,230$49.8K<0.01%new13F-HRTimelineGroup
UBS Group AGin group UBS Group AG8,405$40.9K<0.01%new13F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC6,273$30.6K<0.01%new13F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO4,463$20.8K<0.01%new13F-HR/ATimelineGroup
FMR LLCin group FMR LLC3,274$15.9K<0.01%new13F-HRTimelineGroup
GROUP ONE TRADING LLC2,182$10.6K<0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY1,628$7.93K<0.01%new13F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,152$5.61K<0.01%new13F-HRTimelineGroup
SBI Securities Co., Ltd.866$4.22K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA855$4K<0.01%new13F-HRTimelineGroup
Brown Shipley& Co Ltd478$2.33K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC228$1.11K<0.01%new13F-HRTimeline
PENSION & WEALTH MANAGEMENT ADVISORS, I…225$1.1K<0.01%-2,02513F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.73$356<0.01%new13F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS68$331<0.01%new13F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…14$68<0.01%new13F-HRTimelineGroup
SHP Wealth Management10$49<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC4$19<0.01%new13F-HRTimelineGroup