WAVEMAN · COMPANY

HBIO · Harvard Bioscience Inc

LIVE

TEAM-2.62% 13F +440META+1.00% 13F +2,694RCG+0.35% CLUSTERUTHR-0.54% 13F +425CRWV+5.68% 13F +694CRM-1.97% 13F +1,019CVNA+1.58% 13F +795TPL-1.11% 13F +444NET-1.96% 13F +711MSTR-1.39% 13F +527DELL+1.50% 13F +1,204CRWD-0.87% 13F +1,383ANET+1.22% 13F +1,324COIN-4.18% 13F +475TEAM-2.62% 13F +440META+1.00% 13F +2,694RCG+0.35% CLUSTERUTHR-0.54% 13F +425CRWV+5.68% 13F +694CRM-1.97% 13F +1,019CVNA+1.58% 13F +795TPL-1.11% 13F +444NET-1.96% 13F +711MSTR-1.39% 13F +527DELL+1.50% 13F +1,204CRWD-0.87% 13F +1,383ANET+1.22% 13F +1,324COIN-4.18% 13F +475

← ALL COMPANIES

HBIO

Name: HARVARD BIOSCIENCE INC (HBIO) insider trading and ownership data
Creator: WaveMan
License: https://wave-man.com/terms

HARVARD BIOSCIENCE INC

MEDICAL DEVICES · LABORATORY ANALYTICAL INSTRUMENTS · CIK 0001123494

CLUSTER · 4 INSIDERSACTIVIST 13DC-SUITE BUYING · 2☆ WATCH

INSIDER NET · 180D

$202.4K

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

13F, latest reported quarter

REVENUE GROWTH

-8.1%

XBRL, annual

NET MARGIN

-65.5%

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

net +$202.4K over 180 days

more than 83% of Medical Devices

CONGRESS

no member of Congress has reported trading it

FUNDS

8 funds added or opened last quarter

below 88% of Medical Devices

REVENUE

-8.1% year over year

below 83% of Medical Devices

MARGIN

-65.5% net margin

below 77% of Medical Devices

BUYBACKS

no share repurchases reported

SHORT

1.4% of shares outstanding short · 5.3 days to cover · settled 2026-07-31

below 73% of Medical Devices

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

4 insiders independently bought a net $202.4K — no planned sales are queued against it.

BroadOak Income Fund, L.P. disclosed a 5%+ stake (15.34%) in the last six months.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +63.7%

+63.7%12M

INSIDER BUY13D/G STAKE

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

4 insiders reported buying shares.

The record shows a net $202.4K bought by insiders over 180 days, 8 funds added last quarter. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

TMO PEN ROK BLFS MTD SIBN WRBY ISRG TXG DXCM EW TMDX

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, HARVARD BIOSCIENCE INC insiders bought a net $202.4K of stock across 26 Form 4 purchases and sales, with 4 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-06.

INSIDER

FILED

VALUE

DENELSKY STEPHEN J

Director

BUY

2026-03-17

10,000.0

$48.7K

Snider William

Director

BUY

2026-03-17

8,475.0

$41.1K

Snider William

Director

BUY

2026-03-16

12,525.0

$62.5K

Duke John D

Chief Executive Officer

BUY

2026-03-16

5,000.0

$25.1K

Frost Mark T

Chief Financial Officer

BUY

2026-03-16

5,000.0

$25.0K

26 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 21 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

WEBER CAPITAL MANAGEMENT LLC /ADV

310,861.0 sh

$1.9M

Meros Investment Management, LP

182,992.0 sh

$1.1M

VANGUARD CAPITAL MANAGEMENT LLC

169,625.0 sh

$1.0M

NANO CAP NEW MILLENNIUM GROWTH FUND L P

143,082.0 sh

$880.0K

CORSAIR CAPITAL MANAGEMENT, L.P.

122,810.0 sh

$755.3K

5%+ owners

13D = intent to influence · 13G = passive

BroadOak Income Fund, L.P.

ACTIVIST 13D · 2026-03-23

15.34%

BroadOak Fund VI, L.P.

ACTIVIST 13D · 2026-03-23

0.33%

BroadOak Capital Partners, LLC

ACTIVIST 13D · 2026-03-23

15.57%

William Snider

ACTIVIST 13D · 2026-03-23

15.97%

FORM 144

No planned-sale notices

No insider has notified an intent to sell. This is the panel to watch after a run-up.

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Gabelli Global Mini Mites Fund

$19.5K POSITION · AS OF 2026-03-31

0.1%

ACUITAS US MICROCAP FUND

$42.8K POSITION · AS OF 2026-03-31

0.0%

Fidelity Extended Market Index Fund

$137.8K POSITION · AS OF 2026-02-28

0.0%

VANGUARD EXTENDED MARKET INDEX FUND

$194.0K POSITION · AS OF 2026-03-31

0.0%

Blackstone Alternative Multi-Strategy Fund

$3.3K POSITION · AS OF 2026-03-31

0.0%

Fidelity Nasdaq Composite Index Fund

$18.0K POSITION · AS OF 2026-02-28

0.0%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Executive pay vs shareholder return

DEF 14A pay-versus-performance disclosure · both the headline pay and the SEC's mark-to-market figure, beside the return the company delivered and the return of the peer group it chose itself

CEO TOTAL

ACTUALLY PAID

OTHER NEOs AVG

TSR

PEER TSR

2022

$2.3M

-$3.7M

$495.3K

-61%

—

TAGGED BY THE COMPANY UNDER SEC ITEM 402(v) · RETURN IS CUMULATIVE FROM THE START OF THE DISCLOSURE PERIOD · GREEN WHERE THE COMPANY BEAT ITS OWN PEER GROUP

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12	2022-12
REVENUE	$86.5M	$94.1M	$112.2M	$113.3M
GROSS PROFIT	$49.9M	$54.8M	$66.1M	$60.8M
OPERATING INCOME	$-48.6M	$-6.2M	$1.9M	$-6.9M
NET INCOME	$-56.7M	$-12.4M	$-3.4M	$-9.5M
EPS (DILUTED)	-1.28	-0.28	-0.08	-0.23
OPERATING CASH FLOW	$6.7M	$1.4M	$14.0M	$1.2M
CASH	$8.6M	$4.1M	$4.3M	$4.5M
LONG-TERM DEBT	$35.9M	$0	$30.7M	$43.0M

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-06 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE