Harvard Bioscience Inc: which funds bought and sold

Institutions that bought and sold Harvard Bioscience shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 7 institutions that filed 13F reports for both quarters added to or opened positions in Harvard Bioscience, and 18 cut or closed them. Together they added a net 3,803 shares, +0.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 2,301 shares (−0.5%); index fund managers were net sellers of 6,036 shares (−1.8%). 4 opened a new position and 3 sold out entirely.

Bought, Q2 2026 7 institutions, 4 of them new holders Sold, Q2 2026 18 institutions, 3 of them sold out

Net change, all compared +3,803 shares (+0.3%)

Net change, active managers −2,301 shares (−0.5%), 2 bought, 4 sold

Buyers versus sellers

institutions compared, 37

7 bought 12 18 sold

Active managers and hedge funds 2 bought · 4 sold · −2,301

Index fund managers 1 bought · 2 sold · −6,036

Other institutions 4 bought · 12 sold · +12K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Mink Brook Asset Management LLC	+33K New position	33K	$205,219
Citadel Advisors LLC Hedge fund	+13K New position	13K	$81,494
Goldman Sachs Group Inc	+11K New position	11K	$65,541
UBS Group AG	+9,176 +109.2%	18K	$108,123
Vanguard Capital Management LLC Index funds	+6,312 +3.9%	170K	$1M
Two Sigma Investments, LP Hedge fund	+428 +0.4%	115K	$704,452
Barclays PLC	+26 New position	26	$160

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Citadel Advisors LLC Hedge fund	+13K New position	13K	$81,494
Two Sigma Investments, LP Hedge fund	+428 +0.4%	115K	$704,452

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−14K −29.6%	33K	$200,613
Geode Capital Management, LLC Index funds	−12K −20.1%	48K	$292,534
Jane Street Group, LLC	−9,848 −41.3%	14K	$85,989
Weber Capital Management LLC	−9,176 −2.9%	311K	$1.9M
Citigroup Inc	−6,273 Sold out	0	—
Williams & Novak, LLC	−6,103 −22.6%	21K	$128,836
Jpmorgan Chase & Co	−4,268 −95.6%	195	$1,194
Renaissance Technologies LLC Hedge fund	−2,100 −2.1%	99K	$610,861
Corsair Capital Management, L.P.	−2,000 −1.6%	123K	$755,282
Group One Trading LLC	−1,942 −89.0%	240	$1,476
Royal Bank Of Canada	−855 Sold out	0	—
Tower Research Capital LLC (TRC)	−572 −49.7%	580	$3,567
Blackrock, Inc. Index funds	−392 −0.6%	62K	$380,280
FMR LLC Active manager	−95 −2.9%	3,179	$19,551
Federated Hermes, Inc. Active manager	−73 Sold out	0	—
Essex Investment Management Co LLC	−48 −0.2%	27K	$165,884
BNP Paribas Financial Markets	−2 −2.9%	66	$406
Morgan Stanley	−1 −0.1%	1,627	$10,006

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−14K −29.6%	33K	$200,613
Renaissance Technologies LLC Hedge fund	−2,100 −2.1%	99K	$610,861
FMR LLC Active manager	−95 −2.9%	3,179	$19,551
Federated Hermes, Inc. Active manager	−73 Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Mink Brook Asset Management LLC	33K	$205,219
Citadel Advisors LLCHedge fund	13K	$81,494
Goldman Sachs Group Inc	11K	$65,541
Barclays PLC	26	$160

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Citigroup Inc	6,273	$30,550
Royal Bank Of Canada	855	$4,000
Federated Hermes, Inc.Active manager	73	$356

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 34
Ten largest holders: 86.6%
Index fund managers: 23.8%
Active managers and hedge funds: 32.7%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	2	4	1	1	−2,301	−0.5%
Index fund managers	1	2	0	0	−6,036	−1.8%
Other institutions	4	12	3	2	+12K	+2.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Harvard Bioscience.

Only managers that filed a holdings report for both quarters are compared (37 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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