# Biotech investors based in Boston (2026 list) > 30 biotech investors based in Boston, 90% active in the last 12 months. Led by MassChallenge, Polaris Partners, RA Capital Management. Source: https://millionrounds.com/lists/biotech-investors-based-in-boston (Millionrounds; every figure on the page links to its filing or article) [Investor Lists](https://millionrounds.com/lists) # Biotech investors based in Boston Updated 7 November 2026 Firms with an address in Boston that we have watched back a biotech company in the last two years. [See all 30 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fbiotech-investors-based-in-boston)The top 25 **30** investors on the list No change this week **430** cheques in 12 months *-5%* against the market **$43M** median round they joined *+438%* against the market median **90%** wrote a cheque in 12 months **70%** have led a round ## The Top 25 Ordered by cheques observed, never by anything anyone paid for Deploying now (23) - 1 [MassChallenge](https://millionrounds.com/fund/masschallenge) *Deploying now* Accelerator · United States **984** **$1.8M** median round **Sept 2026** last seen - 2 [Polaris Partners](https://millionrounds.com/fund/polaris-partners) *Deploying now* VC firm · United States **490** **$36M** median round **Oct 2026** last seen - 3 [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) *Deploying now* Private equity · United States **395** **$93M** median round **Nov 2026** last seen - 4 [Wellington Management](https://millionrounds.com/fund/wellington-management) *Deploying now* VC firm · United States **297** **$130M** median round **Oct 2026** last seen - 5 [Cormorant Asset Management](https://millionrounds.com/fund/cormorant-asset-management) *Deploying now* Private equity · United States **176** **$102M** median round **Oct 2026** last seen - 6 [Omega Funds](https://millionrounds.com/fund/omega-funds) *Deploying now* VC firm · United States **104** **$88M** median round **Sept 2026** last seen - 7 [MassMutual Ventures](https://millionrounds.com/fund/massmutual-ventures) *Deploying now* VC firm · United States **84** **$14M** median round **Oct 2026** last seen - 8 [Pillar VC](https://millionrounds.com/fund/pillar-vc) *Deploying now* VC firm · United States **83** **$8.2M** median round **Sept 2026** last seen - 9 [The E14 Fund](https://millionrounds.com/fund/e14-fund) *Deploying now* VC firm · United States **72** **$8M** median round **Oct 2026** last seen - 10 [One Way Ventures](https://millionrounds.com/fund/one-way-ventures) *Deploying now* VC firm · United States **71** **$8M** median round **Nov 2026** last seen - 11 [Bain Capital](https://millionrounds.com/fund/bain-capital) *Deploying now* Private equity · United States **58** **$50M** median round **Aug 2026** last seen - 12 [Longwood Fund](https://millionrounds.com/fund/longwood-fund) *Deploying now* VC firm · United States **53** **$60M** median round **Aug 2026** last seen - 13 [Optum Ventures](https://millionrounds.com/fund/optum-ventures) *Deploying now* VC firm · United States **53** **$25M** median round **Oct 2026** last seen - 14 [Bain Capital Life Sciences](https://millionrounds.com/fund/bain-capital-life-sciences) *Deploying now* Private equity · United States **49** **$134M** median round **Oct 2026** last seen - 15 [Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) *Deploying now* VC firm · United States **42** **$10M** median round **Sept 2026** last seen - 16 [PharmStars](https://millionrounds.com/fund/pharmstars) *Deploying now* Accelerator · United States **34** **$1.6M** median round **Jun 2026** last seen - 17 [Delos Capital](https://millionrounds.com/fund/delos-capital) *Deploying now* Private equity · United States **11** **$34M** median round **Jun 2026** last seen - 18 [Catalyst Health Ventures](https://millionrounds.com/fund/catalyst-health-ventures) *Deploying now* VC firm · United States **9** **$25M** median round **Oct 2026** last seen - 19 [Longview Ventures](https://millionrounds.com/fund/broadview-ventures-inc) quiet VC firm · United States **9** **$45M** median round **May 2025** last seen - 20 [T1D Fund](https://millionrounds.com/fund/t1d-fund) *Deploying now* Corporate VC · United States **7** **$50M** median round **Oct 2026** last seen - 21 [Visible Ventures](https://millionrounds.com/fund/visible-ventures) quiet VC firm · United States **3** **$23M** median round **Sept 2025** last seen - 22 [AMR Action Fund](https://millionrounds.com/fund/amr-action-fund) *Deploying now* VC firm · United States **2** **$15M** median round **Jul 2026** last seen - 23 [Juvia Group](https://millionrounds.com/fund/juvia-group) *Deploying now* VC firm · United States **2** **$243M** median round **Oct 2026** last seen - 24 [Kendall Capital Partners](https://millionrounds.com/fund/kendall-capital-partners) *Deploying now* VC firm · United States **2** **$41M** median round **Mar 2026** last seen - 25 [Newpath Management](https://millionrounds.com/fund/newpath-partners) *Deploying now* Private equity · United States **2** **$98M** median round **May 2026** last seen **5 more on this list** All 30 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000. [See the whole list *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Fbiotech-investors-based-in-boston) ## The Newest Cheques Rounds this list's investors joined most recently - **5** Nov **[Alethio Therapeutics](https://millionrounds.com/company/alethio-therapeutics)** Series A · $90M *Led by* [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) - **4** Nov **[Lazarus AI](https://millionrounds.com/company/lazarus-ai)** $43M *With* [One Way Ventures](https://millionrounds.com/fund/one-way-ventures) - **29** Oct **[Dren Bio](https://millionrounds.com/company/dren-bio)** Other · $350M *Led by* [Juvia Group](https://millionrounds.com/fund/juvia-group) - **29** Oct **[StimCardio](https://millionrounds.com/company/stimcardio)** Series A · $30M *With* [Catalyst Health Ventures](https://millionrounds.com/fund/catalyst-health-ventures) - **27** Oct **[Kivo Health](https://millionrounds.com/company/kivo-health)** Series A · $10M *With* [MassMutual Ventures](https://millionrounds.com/fund/massmutual-ventures) - **27** Oct **[Vera Health](https://millionrounds.com/company/vera-health)** Series A · $29M *With* [Optum Ventures](https://millionrounds.com/fund/optum-ventures) ## Stages This Year 381 rounds - Other **25%** - Venture **14%** - Series A **14%** - Series B **11%** - Seed **9%** - Other **27%** ## What They Backed Sectors, last 12 months - Biotech **152** - AI **69** - Pharma **55** - Healthcare **50** - Big Data & Analytics **12** - Energy **12** ## Cheques by Quarter Led Joined 120 Q1 25 97 Q2 25 112 Q3 25 165 Q4 25 148 Q1 26 114 Q2 26 87 Q3 26 24 Q4 26 The last bar is the quarter still running. ## Lists Like This - [AI investors based in San Francisco 353](https://millionrounds.com/lists/ai-investors-based-in-san-francisco) - [AI investors based in New York 345](https://millionrounds.com/lists/ai-investors-based-in-new-york) - [Seed investors based in San Francisco 273](https://millionrounds.com/lists/seed-investors-based-in-san-francisco) - [Series A investors based in San Francisco 266](https://millionrounds.com/lists/series-a-investors-based-in-san-francisco) - [Series A investors based in New York 255](https://millionrounds.com/lists/series-a-investors-based-in-new-york) - [Seed investors based in New York 227](https://millionrounds.com/lists/seed-investors-based-in-new-york) - [AI investors based in London 223](https://millionrounds.com/lists/ai-investors-based-in-london) - [Series B investors based in New York 198](https://millionrounds.com/lists/series-b-investors-based-in-new-york) - [Fintech investors based in New York 197](https://millionrounds.com/lists/fintech-investors-based-in-new-york) [All investor lists *→*](https://millionrounds.com/lists) ## Quick answers about biotech investors based in Boston ### Who are the most active biotech investors based in Boston? By cheques observed, the most active are MassChallenge, Polaris Partners, RA Capital Management, Wellington Management and Cormorant Asset Management. ### How many biotech investors based in Boston are there? 30 are on record. 90% made an investment in the last 12 months and 70% have led a round. ### Which stages do biotech investors based in Boston back? Of the rounds with a named stage in the last 12 months, mostly Series A (24%) and Series B (19%). ### How big are the rounds biotech investors based in Boston join? The typical (median) round among the leading investors here is $36M. ### Which sectors do biotech investors based in Boston back most? In the last 12 months, mostly Biotech, AI and Pharma. ### Which biotech investors based in Boston lead the most rounds? RA Capital Management (15 led), Wellington Management (15 led) and Omega Funds (8 led). ### What have biotech investors based in Boston invested in recently? Recent rounds include Alethio Therapeutics (Series A, Nov 2026, with RA Capital Management), Lazarus AI (Nov 2026, with One Way Ventures) and Dren Bio (Other, Oct 2026, with Juvia Group). ### How is this list of biotech investors based in Boston ranked? By cheques observed, from the rounds and filings we watched, and never by anything anyone paid for. It is rebuilt every night. Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)