37 biotech investors in Massachusetts, including 34 in Boston
We list 37 biotech investors in Massachusetts as of November 2026: 35 have an SEC filing on file and 2 were checked on the firm's own website or an official register, and the list was last checked on 6 Nov 2026. The cities with the most head offices on this list are Boston (19), Cambridge (10) and Waltham (3). 34 of the 37 are in the Boston metro area, so this page is also our list of biotech investors in Boston.
Top 5 biotech investors in Massachusetts, ranked by recent fund activity
Among firms with a published profile and a dated fund or deal in the last 24 months. The rule: Activity score out of 100: recency of the latest fund filing or dated deal (35: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (25; half of that when the sector is stated only), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (15) and completeness of the public record (10). Regional focus is our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns. The same rule orders the whole list; it is repeated in the method box.
AMR Action Fund
Type: VC firm · HQ: Boston, MA · Focus: Biotech, Healthtech, Media, Medtech · Latest activity: Portfolio news, Aug 2026 · Private fund assets: $977M (SEC Form ADV)
Portfolio news dated Aug 2026; $977M on file (SEC Form ADV); 82% of its observed portfolio is biotech and life sciences; names the US as where it invests; 1 named decision-maker on file.
Safar Partners
Type: VC firm · HQ: Cambridge, MA · Stages: Seed · Focus: Biotech, Healthtech, Industrial Tech, Deep Tech · Latest activity: New deal, Aug 2026 · Fund size on file: $300M (SEC Form D, 2023)
Dated new deal in Aug 2026; $300M fund on file (SEC Form D, 2023); 13% of its observed portfolio is biotech and life sciences; names the US as where it invests; 3 named decision-makers on file.
Battery Ventures
Type: VC firm · HQ: Boston, MA · Stages: Any stage · Focus: Biotech, Energy, Future of Work, Data · Latest activity: Portfolio news, Jul 2026 · Fund size or assets: $3.2B (own site)
Portfolio news dated Jul 2026; $3.2B on file (own site); states biotech and life sciences as a focus; names the US as where it invests.
MVM Partners LLP
Type: VC firm · HQ: Boston, MA · Stages: Growth · Focus: Biotech, Healthtech, Medtech · Latest activity: Portfolio news, Jun 2026 · Private fund assets: $1.0B (SEC Form ADV)
Portfolio news dated Jun 2026; $1.0B on file (SEC Form ADV); states biotech and life sciences as a focus; names the US as where it invests.
Thirdrockventures
Type: VC firm · HQ: Boston, MA · Stages: Pre-seed, Seed · Focus: Biotech, Healthtech, Medtech · Latest activity: New fund, Jun 2026 · Fund size on file: $1.1B (SEC Form D, 2022)
Latest fund filing dated Jun 2026; $1.1B fund on file (SEC Form D, 2022); 94% of its observed portfolio is biotech and life sciences; 8 named decision-makers on file.
First 18 of 37 biotech investors in Massachusetts
| Investor | Type | HQ | Stagesour research | Focusour research | Latest fund or deal | Fund sizeas filed or stated | Checked | Contacts |
|---|---|---|---|---|---|---|---|---|
| AMR Action Fund | VC firm | Boston, MA | Biotech, Healthtech, Media, Medtech | Portfolio news, Aug 2026 | $977M (SEC Form ADV) | 5 Nov 2026 | 1 name · Unlock | |
| Safar Partners | VC firm | Cambridge, MA | Seed | Biotech, Healthtech, Industrial Tech, Deep Tech | New deal, Aug 2026 | $300M (SEC Form D, 2023) | 4 Nov 2026 | 3 names, firm email · Unlock |
| Battery Ventures | VC firm | Boston, MA | Any stage | Biotech, Energy, Future of Work, Data | Portfolio news, Jul 2026 | $3.2B (own site) | 4 Nov 2026 | LinkedIn page · Unlock |
| MVM Partners LLP | VC firm | Boston, MA | Growth | Biotech, Healthtech, Medtech | Portfolio news, Jun 2026 | $1.0B (SEC Form ADV) | 5 Nov 2026 | No contact on file |
| Thirdrockventures | VC firm | Boston, MA | Pre-seed, Seed | Biotech, Healthtech, Medtech | New fund, Jun 2026 | $1.1B (SEC Form D, 2022) | 4 Nov 2026 | 8 names · Unlock |
| Newpath Partners | VC firm | Boston, MA | Biotech, Healthtech | New fund, May 2026 | $350M (SEC Form D, 2021) | 4 Nov 2026 | 1 name, firm email · Unlock | |
| Cybernetix Ventures | VC firm | Boston, MA | Pre-seed, Seed, Series A | Biotech, Robotics, Industrial Tech, Logistics | New fund, Aug 2026 | $100M (SEC Form D, 2025) | 4 Nov 2026 | 2 names · Unlock |
| Banyan Bioinnovations | VC firm | Boston, MA | Biotech, Healthtech | New fund, Jun 2026 | $102M (SEC Form D, 2026) | 4 Nov 2026 | 5 names, firm email · Unlock | |
| Omega Funds | VC firm | Boston, MA | Biotech, Healthtech | Portfolio news, Sep 2026 | $914M (SEC Form ADV) | 5 Nov 2026 | LinkedIn page · Unlock | |
| Delos Capital | VC firm | Cambridge, MA | Biotech, Healthtech, Medtech | Portfolio news, Sep 2026 | 5 Nov 2026 | 8 names · Unlock | ||
| Cure Ventures | VC firm | Boston, MA | Pre-seed, Seed | Biotech, Healthtech | New fund, Dec 2025 | $350M (SEC Form D, 2021) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Atlas Venture | VC firm | Cambridge, MA | Pre-seed | Biotech, Healthtech | New deal, Jan 2026 | $450M (SEC Form D, 2022) | 4 Nov 2026 | 5 names · Unlock |
| Mission BioCapital | VC firm | Cambridge, MA | Pre-seed | Biotech, Healthtech, Medtech | New fund, Apr 2026 | $192M (SEC Form D, 2021) | 4 Nov 2026 | 8 names, firm email · Unlock |
| Agent Capital | VC firm | Waltham, MA | Seed, Growth | Biotech, Healthtech | New fund, Feb 2026 | $100M (SEC Form D, 2021) | 4 Nov 2026 | 8 names, firm email · Unlock |
| RA Capital | VC firm | Boston, MA | Pre-seed, Seed, Series A, Series B, Growth, Any stage | Biotech, Healthtech, Climate Tech, Energy | New deal, Aug 2025 | $881M (SEC Form D, 2021) | 4 Nov 2026 | 8 names · Unlock |
| F-Prime Capital | VC firm | Cambridge, MA | Any stage | Biotech, Healthtech, Crypto and Web3, Fintech | $5.3B (own site) | 4 Nov 2026 | 8 names · Unlock | |
| Awareness Venture | VC firm | Westport, MA | Seed, Series A, Series B | Biotech, Healthtech, AI, Medtech | New fund, Nov 2024 | $6M (SEC Form D, 2023) | 5 Nov 2026 | 3 names · Unlock |
| Engine Ventures | VC firm | Cambridge, MA | Biotech, Energy, AI, Deep Tech | New fund, May 2026 | $500M (SEC Form D, 2026) | 4 Nov 2026 | 8 names, firm email · Unlock |
You are seeing 18 of 37. The full list adds 19 more investors and 161 named decision-makers.
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34 biotech investors in Boston
21 of the 34 have a fund filing or a dated deal in the last 12 months; the median fund size on file is $200M (SEC Form D, 21 firms); the most recent fund filings are from Longwood (Oct 2026), Cybernetix Ventures (Aug 2026) and PharmStars Ventures (Jun 2026); of the 22 with a stage on file, seed (13), pre-seed (12) and growth-stage (4); the count covers the metro area, by city: Boston (19), Cambridge (10) and Waltham (3); the paid file holds 149 named decision-makers for them.
The first 5 in list order: AMR Action Fund, Safar Partners, Battery Ventures, MVM Partners LLP and Thirdrockventures. They are ranked with the rest of the list, by the same rule.
How these 37 break down
By city
| City | On this list | Share |
|---|---|---|
| Boston | 19 | 51% |
| Cambridge | 10 | 27% |
| Waltham | 3 | 8% |
By stage
| Stage | On this list | Share |
|---|---|---|
| Pre-Seed | 13 | 35% |
| Seed | 14 | 38% |
| Series A | 5 | 14% |
| Series B | 3 | 8% |
| Growth | 5 | 14% |
Stage is our research. A firm can back more than one stage.
Method and limits
- Source
- 35 of the 37 rows carry an SEC filing (Form D or Form ADV). 35 of the 37 have a website we checked; the other 2 rest on the filing or register entry alone. Filing date and fund size are SEC data where a filing exists. Stage, sector and check size are our research.
- Inclusion rule
- Organizations that back startups. Individuals, buyout funds and firms we found to be inactive are left out. Sector: the firm states biotech and life sciences as a focus on its own site, or we observed it in the firm's portfolio. Place: head office in Massachusetts.
- Order
- Firms with a published profile come first. Activity score out of 100: recency of the latest fund filing or dated deal (35: full marks within 3 months, then stepping down at 6, 12 and 24 months), share of the observed portfolio in this sector (25; half of that when the sector is stated only), stated focus on the US (15: full marks when the firm names the US as where it invests, half when it says global), size of the fund on file on a log scale (15) and completeness of the public record (10). Regional focus is our research, not an SEC figure. It is a measure of activity and fit, not of quality or returns.
- Last refreshed
- November 2026. Rows on this list were checked between 4 Nov 2026 and 6 Nov 2026.
- Fill rates
- Of 37 rows: stage 25, sector 37, fund size 36, website 35. In the paid file: named decision-makers on 32 rows, firm email on 13, LinkedIn page on 18, check size on 0.
- Corrections
- Email hello@theinvestordatabase.com or use the update form. We act within 5 working days.
Questions
How many biotech investors in Massachusetts are there?
We list 37 as of November 2026. 23 of the 37 have a fund filing or a dated deal in the last 12 months. The cities with the most are Boston (19), Cambridge (10) and Waltham (3).
Which biotech investors in Massachusetts raised a new fund in the last 12 months?
13 of the 37 have a fund filing dated in the last 12 months. The most recent on this list are Longwood (Oct 2026), Cybernetix Ventures (Aug 2026) and PharmStars Ventures (Jun 2026).
What is the typical fund size of biotech investors in Massachusetts?
The median fund size on file for this list is $196M, across the 24 firms with a size on an SEC Form D. The fund on file is each firm's main fund, which is not always its newest. The other 13 do not disclose a size there.
How do I contact biotech investors in Massachusetts?
The paid file holds 161 named decision-makers across 32 of these 37 and a firm email for 13. We publish the address a firm lists itself, never a personal email. Each free row links to a profile with the firm's website.
Where does the data on biotech investors in Massachusetts come from?
35 of the 37 rows have an SEC filing on file (Form D or Form ADV) and 2 were checked on the firm's own website or an official register. Filing date and fund size come from the filing. Stage, sector and check size are our research. Rows on this list were last checked on 6 Nov 2026 at the latest. The whole file is re-verified twice a year.
Broader lists
Biotech venture capital firms in the US (297)Venture capital firms in Massachusetts (185)
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