13F

Stock

Harvard Bioscience Inc

HBIO · held by 36 managers

Reported value

$6.85M

Holders

36

+30 new · −59 exited

Holders’ est. mark

$5.09M

Price effect on 33 books still in the name

Largest holder

$1.56M

WEBER CAPITAL MANAGEMENT LLC /ADV

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
WEBER CAPITAL MANAGEMENT LLC /ADV320K$1.56M$1.34MCut−$581.8K
VANGUARD CAPITAL MANAGEMENT LLC163.3K$795.3KHeld
CORSAIR CAPITAL MANAGEMENT, L.P.124.8K$607.8K$524.4KCut−$133.7K
Meros Investment Management, LP118.5K$577.2K$497.9KCut−$237.2K
NANO CAP NEW MILLENNIUM GROWTH FUND L P117.5K$572.2K$493.6KAdded$170.9K
TWO SIGMA INVESTMENTS, LP114.1K$555.8K$479.4KCut−$121.4K
Renaissance Technologies101.4K$493.9K$426.1KCut−$189.1K
BlackRock, Inc.62.2K$303K$261.4KCut−$113.2K
GEODE CAPITAL MANAGEMENT, LLC59.5K$289.9K$250.1KCut−$18.4K
MILLENNIUM MANAGEMENT LLC46.3K$225.6K$194.7KCut−$139.6K
Williams & Novak, LLC27.1K$137.7K$119.6KCut−$95.6K
VANGUARD FIDUCIARY TRUST CO27.7K$135KHeld
ESSEX INVESTMENT MANAGEMENT CO LLC27K$131.6K$113.5KAdded$8.08K
JANE STREET GROUP, LLC23.8K$116.1K$100.1KCut−$161.6K
RBF Capital, LLC16K$77.9K$67.2KCut−$29.1K
State Street14.9K$72.7K$62.7KCut−$27.2K
Bank of New York Mellon Corp10.2K$49.8K$43KCut−$34.6K
UBS Group AG8.4K$40.9K$35.3KAdded$26.7K
CITIGROUP INC6.27K$30.6K$26.4KCut−$99.1K
JPMORGAN CHASE & CO4.46K$20.8K$7.82KAdded$19.5K
Fidelity3.27K$15.9K$13.8KCut−$6.06K
GROUP ONE TRADING LLC2.18K$10.6K$9.17KCut−$6.44K
MORGAN STANLEY1.63K$7.93K$6.84KCut−$3.23K
Vanguard Global Advisers, LLC1.22K$5.95KHeld
Tower Research Capital LLC (TRC)1.15K$5.61K$4.84KAdded$4.01K
SBI Securities Co., Ltd.866$4.22K$3.64KCut−$1.58K
ROYAL BANK OF CANADA855$4K$3.47KAdded$1K
Brown Shipley& Co Ltd478$2.33K$2.01KCut−$871
NISA INVESTMENT ADVISORS, LLC228$1.11K$958Cut−$421
ACADIAN ASSET MANAGEMENT LLC179.6K$873$753Cut−$311
FEDERATED HERMES, INC.73$356$307Cut−$752
BNP PARIBAS FINANCIAL MARKETS68$331$286Cut−$124
PNC Financial Services Group, Inc.14$68$59Cut−$28
SHP Wealth Management10$49$42Cut−$18
CWM, LLC4$19$19Added$19
Financial Connections Group, Inc.30$0$0Held

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.