HBIONasdaqLaboratory Analytical InstrumentsFiscal year ends December 31
HARVARD BIOSCIENCE INC
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 11, 2026
$8.09+0.00 (0.00%)
Close on Oct 19, 2026
- Market cap
- $36.62M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
29.7%
1M of 5M shares
Institutional holders
35
4 new, 2 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
5 buys · 0 sales
Net bought $202.35K
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| William Snider | 846,000 | 15.97% | 13D (active) | Dec 17, 2025 |
| AMH Equity LLC | 4,047,535 | 9.20% | 13G (passive) amendment | Aug 6, 2025 |
| Weber Capital Management, LLC | 3,200,380 | 7.26% | 13G (passive) amendment | Mar 31, 2025 |
| Leviticus Partners LP | 235,000 | 5.20% | 13G (passive) amendment | Sep 14, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of HBIO | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| Weber Capital Management LLC /Adv | 310,861 | 6.83% | $1.91M | −9,176 | 1.63% |
| Acadian Asset Management LLC | 179,614 | 3.95% | $1.10K | – | 0.00% |
| Vanguard Capital Management LLC | 169,625 | 3.73% | $1.04M | +6,312 | 0.00% |
| Corsair Capital Management, L.P. | 122,810 | 2.70% | $755.28K | −2,000 | 0.09% |
| Two Sigma Investments, LP | 114,545 | 2.52% | $704.45K | +428 | 0.00% |
| Renaissance Technologies LLC | 99,327 | 2.18% | $610.86K | −2,100 | 0.00% |
| BlackRock, Inc. | 61,834 | 1.36% | $380.28K | −392 | 0.00% |
| Geode Capital Management, LLC | 47,555 | 1.04% | $292.53K | −11,956 | 0.00% |
| Mink Brook Asset Management LLC | 33,369 | 0.73% | $205.22K | New | 0.09% |
| Millennium Management LLC | 32,620 | 0.72% | $200.61K | −13,712 | 0.00% |
| Vanguard Fiduciary Trust Co | 27,730 | 0.61% | $170.54K | – | 0.00% |
| Essex Investment Management Co LLC | 26,973 | 0.59% | $165.88K | −48 | 0.02% |
| Williams & Novak, LLC | 20,949 | 0.46% | $128.84K | −6,103 | 0.09% |
| UBS Group AG | 17,581 | 0.39% | $108.12K | +9,176 | 0.00% |
| RBF Capital, LLC | 16,000 | 0.35% | $98.40K | – | 0.00% |
| State Street Corp | 14,932 | 0.33% | $91.83K | – | 0.00% |
| Jane Street Group, LLC | 13,982 | 0.31% | $85.99K | −9,848 | 0.00% |
| Citadel Advisors LLC | 13,251 | 0.29% | $81.49K | New | 0.00% |
| Goldman Sachs Group Inc | 10,657 | 0.23% | $65.54K | New | 0.00% |
| Bank of New York Mellon Corp | 10,230 | 0.22% | $62.92K | – | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 35 | 1M | 29.7% | 4 / 3 | 16 / 2 | 0M | 0M |
| Q1 2026 | 34 | 1M | 29.6% | 33 / 0 | 0 / 0 | 1M | 0M |
| Q4 2025 | 1 | 0M | 0.0% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q3 2025 | 1 | 0M | 0.0% | 0 / 0 | 1 / 1 | 0M | 0M |
| Q2 2025 | 2 | 0M | 0.0% | 1 / 0 | 0 / 0 | 0M | 0M |
| Q1 2025 | 1 | 0M | 0.0% | 0 / 0 | 0 / 0 | 0M | 0M |
| Q4 2024 | 1 | 0M | 0.0% | 0 / 1 | 0 / 0 | 0M | 0M |
| Q3 2024 | 1 | 0M | 0.0% | 1 / 0 | 0 / 0 | 0M | 0M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of HBIO | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 123,470 | 2.71% | $759.34K | 0.00% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 42,043 | 0.92% | $258.56K | 0.00% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 27,769 | 0.61% | $163.28K | 0.00% | May 31, 2026 |
| Acuitas US Microcap Fund | 13,380 | 0.29% | $82.29K | 0.07% | Jun 30, 2026 |
| Fidelity Total Market Index Fund | 7,017 | 0.15% | $41.26K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund | 5,946 | 0.13% | $34.96K | 0.00% | May 31, 2026 |
| Vanguard Balanced Index Fund | 4,112 | 0.09% | $25.29K | 0.00% | Jun 30, 2026 |
| Gabelli Global Mini Mites Fund | 4,000 | 0.09% | $24.60K | 0.09% | Jun 30, 2026 |
| Fidelity Nasdaq Composite Index Fund | 2,936 | 0.06% | $17.26K | 0.00% | May 31, 2026 |
| Dimensional US Sustainability Core 1 ETF | 1,902 | 0.04% | $11.60K | 0.00% | Jul 31, 2026 |
| Dimensional U.S. Small Cap ETF | 1,366 | 0.03% | $8.33K | 0.00% | Jul 31, 2026 |
| U.S. Vector Equity Portfolio | 1,229 | 0.03% | $7.50K | 0.00% | Jul 31, 2026 |
| Dimensional U.S. Core Equity 2 ETF | 1,029 | 0.02% | $6.28K | 0.00% | Jul 31, 2026 |
| Dimensional US Core Equity 1 ETF | 928 | 0.02% | $5.66K | 0.00% | Jul 31, 2026 |
| Blackstone Alternative Multi-Strategy Fund | 683 | 0.02% | $4.20K | 0.00% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| John D. Duke | Chief Executive Officer, Director | 180,000 | 3.95% | Mar 23, 2026 |
| Mark T. Frost | Chief Financial Officer | 17,500 | 0.38% | Apr 1, 2026 |
| Jennifer Cote | Chief Financial Officer | 159,019 | 3.49% | Mar 21, 2025 |
| Katherine A. Eade | Director | 58,669 | 1.29% | Jun 12, 2026 |
| Stephen J. Denelsky | Director | 37,556 | 0.82% | Jun 11, 2026 |
| William Snider | Director | 48,556 | 1.07% | Jun 11, 2026 |
| Robert E. Gagnon | Director | 27,556 | 0.61% | Jun 11, 2026 |
| Seth Benjamin Benson | Director | 27,556 | 0.61% | Jun 11, 2026 |
| James W. Green | Director | 4,062,782 | 89.25% | Aug 19, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Katherine A. Eade Director | Jun 9, 2026 | Award | +16,556 | – | – | 58,669 |
| Stephen J. Denelsky Director | Jun 9, 2026 | Award | +16,556 | – | – | 37,556 |
| William Snider Director | Jun 9, 2026 | Award | +16,556 | – | – | 48,556 |
| Seth Benjamin Benson Director | Jun 9, 2026 | Award | +16,556 | – | – | 27,556 |
| Robert E. Gagnon Director | Jun 9, 2026 | Award | +16,556 | – | – | 27,556 |
| Mark T. Frost Chief Financial Officer | Mar 20, 2026 | Award | +30,000 | – | – | 47,500 |
| John D. Duke Chief Executive Officer, Director | Mar 20, 2026 | Award | +75,000 | – | – | 180,000 |
| William Snider Director | Mar 17, 2026 | Buy | +8,475 | $4.85 | $41.10K | 32,000 |
| Stephen J. Denelsky Director | Mar 17, 2026 | Buy | +10,000 | $4.87 | $48.70K | 21,000 |
| Mark T. Frost Chief Financial Officer | Mar 16, 2026 | Buy | +5,000 | $5.00 | $25.00K | 17,500 |
| William Snider Director | Mar 16, 2026 | Buy | +12,525 | $4.99 | $62.50K | 23,525 |
| John D. Duke Chief Executive Officer, Director | Mar 16, 2026 | Buy | +5,000 | $5.01 | $25.05K | 105,000 |
| William Snider Director | Dec 17, 2025 | Award | +110,000 | – | – | 110,000 |
| Stephen J. Denelsky Director | Sep 5, 2025 | Award | +110,000 | – | – | 110,000 |
| James W. Green Director | Aug 15, 2025 | Tax withholding | −11,540 | $0.53 | $6.12K | 2,631,968 |
| James W. Green Director | Aug 15, 2025 | Returned to company | −119,332 | – | – | 2,643,508 |
| James W. Green Director | Aug 15, 2025 | Tax withholding | −33,200 | $0.53 | $17.60K | 2,762,840 |
| James W. Green Director | Aug 15, 2025 | Returned to company | −49,048 | – | – | 2,796,040 |
| James W. Green Director | Aug 15, 2025 | Returned to company | −66,036 | – | – | 2,565,905 |
| James W. Green Director | Aug 15, 2025 | Returned to company | −113,366 | – | – | 2,452,566 |
| John D. Duke Chief Executive Officer, Director | Aug 8, 2025 | Award | +500,000 | – | – | 1,000,000 |
| John D. Duke Chief Executive Officer, Director | Aug 8, 2025 | Award | +500,000 | – | – | 500,000 |
| Seth Benjamin Benson Director | Jul 16, 2025 | Award | +110,000 | – | – | 110,000 |
| Robert E. Gagnon Director | Jul 16, 2025 | Award | +110,000 | – | – | 110,000 |
| Katherine A. Eade Director | Jul 16, 2025 | Award | +110,000 | – | – | 421,126 |
| Mark T. Frost Interim CFO | May 12, 2025 | Award | +100,000 | – | – | 125,000 |
| Jennifer Cote Chief Financial Officer | Mar 19, 2025 | Tax withholding | −5,687 | $0.69 | $3.92K | 159,019 |
| James W. Green Chief Executive Officer, Director | Mar 19, 2025 | Tax withholding | −38,413 | $0.69 | $26.50K | 2,845,088 |
| James W. Green Chief Executive Officer, Director | Dec 31, 2024 | Returned to company | −145,365 | – | – | 2,883,501 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2024 | Tax withholding | −25,310 | $1.98 | $50.11K | 3,028,866 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2024 | Tax withholding | −56,915 | $1.98 | $112.69K | 3,054,176 |
| Jennifer Cote Chief Financial Officer | Dec 29, 2024 | Tax withholding | −4,731 | $1.98 | $9.37K | 164,007 |
| Jennifer Cote Chief Financial Officer | Dec 29, 2024 | Tax withholding | −3,797 | $1.98 | $7.52K | 160,210 |
| James W. Green Chief Executive Officer, Director | Jun 13, 2024 | Buy | +10,000 | $2.91 | $29.10K | 3,111,091 |
| James W. Green Chief Executive Officer, Director | Jun 6, 2024 | Buy | +20,000 | $3.07 | $61.40K | 3,101,091 |
| Katherine A. Eade Director | May 21, 2024 | Award | +45,872 | – | – | 311,126 |
| Thomas W. Loewald Director | May 21, 2024 | Award | +45,872 | – | – | 295,311 |
| Alan I. Edrick Director | May 21, 2024 | Award | +45,872 | – | – | 273,911 |
| Bertrand Loy Director | May 21, 2024 | Award | +56,575 | – | – | 56,575 |
| Jennifer Cote Chief Financial Officer | Mar 6, 2024 | Tax withholding | −9,920 | $4.11 | $40.77K | 168,738 |
| James W. Green Chief Executive Officer, Director | Mar 5, 2024 | Award | +214,797 | – | – | 2,866,294 |
| James W. Green Chief Executive Officer, Director | Mar 5, 2024 | Award | +214,797 | – | – | 3,081,091 |
| Jennifer Cote Chief Financial Officer | Mar 5, 2024 | Award | +35,800 | – | – | 142,858 |
| Jennifer Cote Chief Financial Officer | Mar 5, 2024 | Award | +35,800 | – | – | 178,658 |
| James W. Green Chief Executive Officer, Director | Dec 31, 2023 | Tax withholding | −82,790 | $5.35 | $442.93K | 2,651,497 |
| Jennifer Cote Chief Financial Officer, Director | Dec 29, 2023 | Tax withholding | −3,279 | $5.35 | $17.54K | 109,689 |
| Jennifer Cote Chief Financial Officer, Director | Dec 29, 2023 | Tax withholding | −2,631 | $5.35 | $14.08K | 107,058 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2023 | Tax withholding | −52,206 | $5.35 | $279.30K | 2,734,287 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2023 | Tax withholding | −24,187 | $5.35 | $129.40K | 2,838,492 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2023 | Tax withholding | −28,783 | $5.35 | $153.99K | 2,809,709 |
| James W. Green Chief Executive Officer, Director | Dec 29, 2023 | Tax withholding | −23,216 | $5.35 | $124.21K | 2,786,493 |
| James W. Green Chief Executive Officer, Director | Aug 17, 2023 | Buy | +25,000 | $4.38 | $109.50K | 2,862,679 |
| James W. Green Chief Executive Officer, Director | Jun 11, 2023 | Tax withholding | −48,373 | $5.46 | $264.12K | 2,837,679 |
| Alan I. Edrick Director | May 22, 2023 | Award | +25,554 | – | – | 228,039 |
| Thomas W. Loewald Director | May 22, 2023 | Award | +25,554 | – | – | 249,439 |
| Katherine A. Eade Director | May 22, 2023 | Award | +25,554 | – | – | 265,254 |
| Bertrand Loy Director | May 22, 2023 | Award | +31,516 | – | – | 79,009 |
| Alan I. Edrick Director | Mar 15, 2023 | Buy | +16,192 | $2.62 | $42.42K | 202,485 |
| James W. Green Chief Executive Officer, Director | Mar 15, 2023 | Buy | +20,000 | $2.60 | $52.00K | 2,886,052 |
| Alan I. Edrick Director | Mar 14, 2023 | Buy | +13,808 | $2.67 | $36.87K | 186,293 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.