Company lists · Data refreshed September 2026

Top 22 Late stage venture capital based in Boston, United States

Name: Late stage venture capital based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 91 companies tracked

RevenueBase identified 91 late stage venture capital headquartered in Boston, United States as of September 2026 and tracks 1,375 professional contacts across them, including 644 with verified work emails. New York is the largest hub.

This list covers late stage venture capital headquartered in Boston, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

91Companies

1,375Contacts tracked

644Verified emails

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The 22 largest late stage venture capital based in Boston, United States

Ranked by team size

Top 22 of 91 late stage venture capital based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names late stage venture capital: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	RA Capital ManagementStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	201-500	242
	“Founded in 2004, RA Capital Management is an active, multi-stage investment manager dedicated to evidence-based, science-led investing in public and private healthcare, life…” Source: company website · checked Sep 4, 2026
2	Third Rock VenturesIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	51-200	110
	“We discover, launch and build great companies based on bold ideas that meet at the intersection of science, strategy, business and medicine – where transformational science meets…” Source: company website · checked Sep 4, 2026
3	FA Technology VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	n/a	109
	“FA Technology Ventures is an independent, established venture capital firm.” Source: company website · checked Sep 4, 2026
4	Silversmith Capital PartnersPartial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	51-200	65
	“Founded in 2015, Silversmith Capital Partners is a Boston-based growth equity firm with over $5 billion in capital under management.” Source: company website · checked Sep 4, 2026
5	Optum VenturesPartial evidence	Boston, United StatesHQ checked Sep 4, 2026	11-50	60
	“At Optum Ventures, we look for exceptional teams with data-driven technologies and services that are poised to deeply disrupt the status quo.” Source: company website · checked Sep 4, 2026
6	Erez CapitalPartial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	n/a	40
	“VC + management firm accelerating AI, healthcare, fintech & deeptech startups with capital and strategic support.” Source: company website · checked Sep 4, 2026
7	Companyon VenturesIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	n/a	40
	“We back just a few fast-moving, founder-led B2B startups each year.” Source: company website · checked Sep 4, 2026
8	M33 GrowthStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	37
	“M33 Growth is a venture and growth stage investment firm that seeks to partner with founders and CEOs to rapidly scale their companies and break through as industry leaders.” Source: company website · checked Sep 4, 2026
9	PJCStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	n/a	37
	“PJC is an early-stage venture capital firm focused on investing in, supporting, and building relationships with entrepreneurs who are creating the future.” Source: company website · checked Sep 4, 2026
10	Venture GuidesStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	35
	“Venture Guides is an early-stage infrastructure software investment firm with a unique team based approach that has resulted in over 80% of portfolio companies generating positive…” Source: company website · checked Sep 4, 2026
11	Riverside PartnersIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	29
	“Founded in 1989, Riverside Partners is a Boston-based middle market private equity firm currently investing Riverside Fund VI, L.P.” Source: company website · checked Sep 4, 2026
12	Transformation CapitalIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	27
	“Never in history has there been a better time to change and improve the $3 trillion healthcare system and lead the charge in its disruption.” Source: company website · checked Sep 4, 2026
13	Digital Fuel CapitalIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	26
	“We are passionate about digital marketing: the marriage of science and art, the ability to test and innovate rapidly and the opportunities to serve distinct consumer interests and…” Source: company website · checked Sep 4, 2026
14	Raptor GroupPartial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	26
	“At The Raptor Group, we source and invest in companies across various stages and asset classes, ranging from early stage to both private and public equity to funds.” Source: company website · checked Sep 4, 2026
15	Catalyst Health VenturesPartial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	1-10	23
	“CHV (Catalyst Health Ventures) invests in transformative MedTech companies that are addressing global unmet healthcare needs and have the potential to become the new standard of…” Source: company website · checked Sep 4, 2026
16	LrvhealthIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	14
	“LRVHealth invests with the founders changing healthcare and the organizations driving that change forward.” Source: company website · checked Sep 4, 2026
17	Myriad Venture PartnersStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	1-10	13
	“An early-stage venture firm defining the future of business solutions.” Source: company website · checked Sep 4, 2026
18	Liquidmetal VenturesStrong evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	13
	“LiquidMetal Ventures is a Boston based, early-stage focused venture capital fund focusing on Energy & Sustainability, Biotech & Healthcare and AI & Robotics, with a mission…” Source: company website · checked Sep 4, 2026
19	Massmutual VenturesIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	12
	“Our Culture: At MMV, we’re a team of fair, dedicated investors and operators who put integrity, collaboration, and teamwork at the forefront of what we do.” Source: company website · checked Sep 4, 2026
20	Romulus CapitalIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	11-50	11
	“We're hiring!” Source: company website · checked Sep 4, 2026
21	Boston Harbor AngelsIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	1-10	9
	“Boston Harbor Angels, Celebrating 20 Years of Angel Investing, like a lighthouse, helps entrepreneurs navigate and grow their start-up businesses through the treacherous waters of…” Source: company website · checked Sep 4, 2026
22	GenesisIndirect evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	1-10	8
	“Supporting exceptional individuals” Source: company website · checked Sep 4, 2026

Showing 22 of 91 late stage venture capital based in Boston, United States

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Late stage venture capital based in Boston, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 322 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 91 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among late stage venture capital, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Boston, United States whose own description of what they do matches “late stage venture capital”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among late stage venture capital, and records with no verified work email. Companies headquartered outside Boston are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 644 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 4, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Late stage venture capital by metro in the United States

Frequently asked

How many late stage venture capital are there based in Boston, United States?

RevenueBase identified 91 late stage venture capital headquartered in Boston, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

RA Capital Management, headquartered in Boston, tops this list with the largest team on record.

Which city has the most late stage venture capital?

New York leads with 322 headquartered companies, followed by San Francisco (259) and Boston (91).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 644 verified decision-maker contacts tracked across these 91 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 4, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.