Vault-13

HARVARD BIOSCIENCE INC

COM · CUSIP 416906105

2 institutional holders -1 vs Q1 2026
326,074326.1k shares reported held*
$2.0mreported value*
0 new 2 added 0 reduced 0 sold out net bought ≈ $553.8k (+90.1k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $6.15.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 79Q4 22: 69Q1 23: 67Q2 23: 101Q3 23: 95Q4 23: 94Q1 24: 91Q2 24: 101Q3 24: 95Q4 24: 96Q1 25: 92Q2 25: 68Q3 25: 60Q4 25: 63Q1 26: 3Q2 26: 22Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202279
Q4 202269
Q1 202367
Q2 2023101
Q3 202395
Q4 202394
Q1 202491
Q2 2024101
Q3 202495
Q4 202496
Q1 202592
Q2 202568
Q3 202560
Q4 202563
Q1 20263
Q2 20262

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 24: 43 bought or addedQ3 24: 45 cut or sold outQ4 24: 47 bought or addedQ4 24: 39 cut or sold outQ4 24Q1 25: 31 bought or addedQ1 25: 47 cut or sold outQ2 25: 32 bought or addedQ2 25: 64 cut or sold outQ2 25Q3 25: 14 bought or addedQ3 25: 41 cut or sold outQ4 25: 30 bought or addedQ4 25: 25 cut or sold outQ4 25Q1 26: 0 bought or addedQ1 26: 62 cut or sold outQ2 26: 2 bought or addedQ2 26: 0 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 20244345
Q4 20244739
Q1 20253147
Q2 20253264
Q3 20251441
Q4 20253025
Q1 2026062
Q2 202620

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$20k$40k$60k$80kQ3 25 calls: $31.5kQ3 25 puts: $0Q3 25P/C 0.00Q4 25 calls: $66.8kQ4 25 puts: $4.8kQ4 25P/C 0.07Q1 26 calls: $0Q1 26 puts: $0Q1 26P/C —Q2 26 calls: $0Q2 26 puts: $0Q2 26P/C —
Numbers
QuarterCallsPutsP/C
Q3 2025$31.5k$00.00
Q4 2025$66.8k$4.8k0.07
Q1 2026$0$0—
Q2 2026$0$0—

Biggest buyers

Meros Investment Management, LP Added +64,470+64.5k
NANO CAP NEW MILLENNIUM GROWTH FUND L P Added +25,582+25.6k

Biggest sellers

None

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
WEBER CAPITAL MANAGEMENT LLC /ADV 13G · institution +1.5 pts · filed 2025-05-08 7.3% +1.5 pts 3.2m 2025-05-08
Leviticus Partners LP 13G · institution -1.3 pts · filed 2026-09-22 5.2% -1.3 pts 235.0k 2026-09-22

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Meros Investment Management, LP 0.36% of their portfolio DALLAS, TX 182,992183.0k $1.1m $1.1m 0.36% Added +64.5k +64,470
2 NANO CAP NEW MILLENNIUM GROWTH FUND L P 0.68% of their portfolio STATEN ISLAND, NY 143,082143.1k $880.0k $880.0k 0.68% Added +25.6k +25,582