# Investors based in Waltham (2026 list) > 39 investors based in Waltham, 10% active in the last 12 months. Led by MassVentures, Longworth Venture Partners, HLM Investment Partners. Source: https://millionrounds.com/lists/investors-based-in-waltham (Millionrounds; every figure on the page links to its filing or article) [Investor Lists](https://millionrounds.com/lists) # Investors based in Waltham Updated 7 November 2026 Firms with an address in Waltham. A head office is a fact about the firm; where it invests is on its own page. [See all 39 *→*](https://millionrounds.com/login?join=1&next=%2Fapp%2Finvestor-lists%2Finvestors-based-in-waltham)The top 25 **39** investors on the list No change this week **20** cheques in 12 months *-38%* against the market **$10M** median round they joined *+25%* against the market median **10%** wrote a cheque in 12 months **0%** have led a round ## The Top 25 Ordered by cheques observed, never by anything anyone paid for Deploying now (4) - 1 [MassVentures](https://millionrounds.com/fund/massventures) *Deploying now* VC firm · United States **129** **$735K** median round **Oct 2026** last seen - 2 [Longworth Venture Partners](https://millionrounds.com/fund/longworth-venture-partners) quiet VC firm · United States **78** **$4M** median round **Jul 2016** last seen - 3 [HLM Investment Partners](https://millionrounds.com/fund/hlm-investment-partners) quiet VC firm · United States **69** **$12M** median round **Aug 2017** last seen - 4 [ABS Ventures](https://millionrounds.com/fund/abs-ventures) quiet VC firm · United States **40** **$12M** median round **Nov 2012** last seen - 5 [Massachusetts Life Sciences Center](https://millionrounds.com/fund/massachusetts-life-sciences-center) quiet Government · United States **10** **$500K** median round **Jan 2014** last seen - 6 [Key Venture Partners](https://millionrounds.com/fund/key-venture-partners) dormant VC firm · United States **7** **$7.5M** median round **Apr 2015** last seen - 7 [Agent Capital](https://millionrounds.com/fund/agent-capital) *Deploying now* VC firm · United States **6** **$43M** median round **Oct 2026** last seen - 8 [Norwich Ventures](https://millionrounds.com/fund/norwich-ventures) quiet VC firm · United States **6** **$5.4M** median round **Mar 2015** last seen - 9 [MedEquity Capital](https://millionrounds.com/fund/medequity-capital) quiet Private equity · United States **2** **$13M** median round **Jul 2003** last seen - 10 [WONDERSTONE Ventures](https://millionrounds.com/fund/wonderstone-ventures) *Deploying now* VC firm · United States **2** **$63M** median round **Feb 2026** last seen - 11 [NameMedia, Inc.](https://millionrounds.com/fund/namemedia-inc) quiet VC firm · United States **1** **$1M** median round **Jun 2009** last seen - 12 [Skycore](https://millionrounds.com/fund/skycore) quiet Growth equity · United States **1** **$10M** median round **Jun 2011** last seen - 13 [Veralto](https://millionrounds.com/fund/veralto) *Deploying now* Growth equity · United States **1** **$55M** median round **Aug 2026** last seen - 14 [BVI Medical](https://millionrounds.com/fund/bvi-medical) unknown Investment firm · United States **none observed** **-** median round **-** last seen - 15 [Bentley Entrepreneurship Society](https://millionrounds.com/fund/bentley-entrepreneurship-society) unknown Investment firm · United States **none observed** **-** median round **-** last seen - 16 [Bentley Venture Capital Fund](https://millionrounds.com/fund/bentley-venture-capital-fund) unknown VC firm · United States **none observed** **-** median round **-** last seen - 17 [Boston Angel Club Investment](https://millionrounds.com/fund/boston-angel-club-investment) unknown VC firm · United States **none observed** **-** median round **-** last seen - 18 [Boston Innovation Growth, Inc.](https://millionrounds.com/fund/boston-innovation-growth-inc) unknown Investment firm · United States **none observed** **-** median round **-** last seen - 19 [Brandeis Private Equity & Venture Capital Club](https://millionrounds.com/fund/brandeis-private-equity-and-venture-capital-club) unknown Private equity · United States **none observed** **-** median round **-** last seen - 20 [Buyers Edge Platform](https://millionrounds.com/fund/buyers-edge-platform) unknown United States **none observed** **-** median round **-** last seen - 21 [C.P. Baker & Compa...](https://millionrounds.com/fund/c-p-baker-and-compa) unknown Private equity · United States **none observed** **-** median round **-** last seen - 22 [Claridge Ventures](https://millionrounds.com/fund/claridge-ventures) unknown Family office · United States **none observed** **-** median round **-** last seen - 23 [Commonwealth Financial Network](https://millionrounds.com/fund/commonwealth-financial-network) unknown Investment firm · United States **none observed** **-** median round **-** last seen - 24 [CyberX](https://millionrounds.com/fund/cyberx) unknown Investment firm · United States **none observed** **-** median round **-** last seen - 25 [KO Capital Group LLC](https://millionrounds.com/fund/ko-capital-ventures) unknown Investment firm · United States **none observed** **-** median round **-** last seen **14 more on this list** All 39 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%2Finvestors-based-in-waltham) ## The Newest Cheques Rounds this list's investors joined most recently - **27** Oct **[Emvolon](https://millionrounds.com/company/emvolon)** Series A · $22M *With* [MassVentures](https://millionrounds.com/fund/massventures) - **23** Oct **[Star Therapeutics](https://millionrounds.com/company/star-therapeutics)** Other · $200M *With* [Agent Capital](https://millionrounds.com/fund/agent-capital) - **1** Sept **[RISE Robotics](https://millionrounds.com/company/rise-robotics)** Grant · $100K *With* [MassVentures](https://millionrounds.com/fund/massventures) - **1** Sept **[Everest Biolabs](https://millionrounds.com/company/everest-biolabs)** Grant · $2.1M *With* [MassVentures](https://millionrounds.com/fund/massventures) - **1** Sept **[DynamiCare Health](https://millionrounds.com/company/dynamicare-health)** Venture · $720K *With* [MassVentures](https://millionrounds.com/fund/massventures) - **4** Aug **[Claros Technologies](https://millionrounds.com/company/claros-technologies)** Series B · $55M *With* [Veralto](https://millionrounds.com/fund/veralto) ## Stages This Year 20 rounds - Series A **25%** - Venture **25%** - Seed **20%** - Grant **15%** - Other **10%** - Other **5%** ## What They Backed Sectors, last 12 months - Manufacturing **4** - Energy **3** - Healthcare **2** - Biotech **2** - Hardware & Electronics **2** - AI **2** ## Cheques by Quarter Led Joined 7 Q1 25 18 Q2 25 4 Q3 25 4 Q4 25 9 Q1 26 Q2 26 8 Q3 26 2 Q4 26 The last bar is the quarter still running. ## Lists Like This - [Investors based in London 4,496](https://millionrounds.com/lists/investors-based-in-london) - [Investors based in CA 3,746](https://millionrounds.com/lists/investors-based-in-ca) - [Investors based in NY 3,658](https://millionrounds.com/lists/investors-based-in-ny) - [Investors based in WA 2,473](https://millionrounds.com/lists/investors-based-in-wa) - [Investors based in San Francisco 2,377](https://millionrounds.com/lists/investors-based-in-san-francisco) - [Investors based in TX 2,250](https://millionrounds.com/lists/investors-based-in-tx) - [Investors based in Dubai 1,922](https://millionrounds.com/lists/investors-based-in-dubai) - [Investors based in Los Angeles 1,261](https://millionrounds.com/lists/investors-based-in-los-angeles) - [Investors based in Chicago 1,255](https://millionrounds.com/lists/investors-based-in-chicago) [All investor lists *→*](https://millionrounds.com/lists) ## Quick answers about investors based in Waltham ### Who are the most active investors based in Waltham? By cheques observed, the most active are MassVentures, Longworth Venture Partners, HLM Investment Partners, ABS Ventures and Massachusetts Life Sciences Center. ### How many investors based in Waltham are there? 39 are on record. 10% made an investment in the last 12 months. ### Which stages do investors based in Waltham back? Of the rounds with a named stage in the last 12 months, mostly Series A (38%) and Seed (31%). ### How big are the rounds investors based in Waltham join? The typical (median) round among the leading investors here is $10M. ### Which sectors do investors based in Waltham back most? In the last 12 months, mostly Manufacturing, Energy and Healthcare. ### What have investors based in Waltham invested in recently? Recent rounds include Emvolon (Series A, Oct 2026, with MassVentures), Star Therapeutics (Other, Oct 2026, with Agent Capital) and RISE Robotics (Grant, Sept 2026, with MassVentures). ### How is this list of investors based in Waltham ranked? By cheques observed, from the rounds and filings we watched, and never by anything anyone paid for. It is rebuilt every night. ### Can I see all 39 investors based in Waltham? The top 25 are here. All 39 are in the app, with filters for stage, sector, market and cheque size. A free account shows 10 per search, Pro up to 1,000. Built from the rounds we watched, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections)