Company lists · Data refreshed September 2026

Top 25 Growth stock investment firms based in Boston, United States

Name: Growth stock investment firms based in Boston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 89 companies tracked

RevenueBase identified 89 growth stock investment firms headquartered in Boston, United States as of September 2026 and tracks 10,974 professional contacts across them, including 4,021 with verified work emails. Across the United States, New York is the largest hub for this category (330 companies); Boston has 89.

This list covers growth stock investment firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

89Companies

10,974Contacts tracked

4,021Verified emails

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The 25 largest growth stock investment firms based in Boston, United States

Ranked by team size

Top 25 of 89 growth stock investment firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to growth stock investment firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	MFS Investment Management	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,738 contacts →
	Indirect evidence “In 1924, MFS launched the US’ first open-end mutual fund.” Source: RevenueBase Database · checked Sep 28, 2026
2	Loomis, Sayles & Company	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	501-1,000	1,010 contacts →
	Partial evidence “For a century, Loomis, Sayles & Company has built a legacy focused on fulfilling the investment needs of institutional and retail clients worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
3	Putnam Investments	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	n/a	995 contacts →
	Indirect evidence “Diversified equity-only asset manager serving clients and investors worldwide since 1937.” Source: RevenueBase Database · checked Sep 28, 2026
4	GMO	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	201-500	780 contacts →
	Partial evidence “For nearly 50 years, GMO has partnered with a broad range of sophisticated institutions, financial intermediaries, and families to provide the investment expertise they need to…” Source: RevenueBase Database · checked Sep 28, 2026
5	Eaton Vance	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	501-1,000	517 contacts →
	Indirect evidence “Eaton Vance provides advanced investing to forward-thinking investors, applying discipline and long-term perspective to the management of client portfolios.” Source: RevenueBase Database · checked Sep 28, 2026
6	PSG	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	513 contacts →
	Partial evidence “PSG is a growth equity firm that partners with software and technology-enabled services companies to help them navigate transformational growth, capitalize on strategic…” Source: RevenueBase Database · checked Sep 28, 2026
7	Boston Partners	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	189 contacts →
	Indirect evidence “For more than 30 years, we've combined attractive valuations, strong fundamentals, and positive business momentum in every portfolio we manage.” Source: RevenueBase Database · checked Sep 28, 2026
8	State Street Global Advisors	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	155 contacts →
	Indirect evidence “For four decades, State Street Global Advisors has served the world’s governments, institutions and financial advisors.” Source: RevenueBase Database · checked Sep 28, 2026
9	Weiss Asset Management	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	150 contacts →
	Partial evidence “For over 30 years, Weiss Asset Management has developed proprietary value-based investment strategies designed to deliver high risk-adjusted returns to our investors, who include…” Source: RevenueBase Database · checked Sep 28, 2026
10	Congress Asset Management	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	101 contacts →
	Partial evidence “Congress Asset Management is a privately owned investment management firm based in Boston, MA.” Source: RevenueBase Database · checked Sep 28, 2026
11	Gw&k Investment Management	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Partial evidence “Founded in 1974, GW & K Investment Management is a dynamic Boston-based investment management firm that offers active equity and fixed income investment solutions to meet the…” Source: RevenueBase Database · checked Sep 28, 2026
12	Spectrum Equity	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	94 contacts →
	Partial evidence “Founded in 1994, Spectrum Equity is a leading growth equity firm with offices in Boston, San Francisco, and London.” Source: RevenueBase Database · checked Sep 28, 2026
13	Boston Trust Walden	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	90 contacts →
	Partial evidence “We are an independent, employee-owned organization that specializes in actively managed multi-asset and equity investment strategies for individual and institutional investors.” Source: RevenueBase Database · checked Sep 28, 2026
14	Volition Capital	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	63 contacts →
	Partial evidence “Volition Capital is a growth equity firm established in 2010 that focuses on investing in high-growth, founder-owned technology businesses across the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
15	Anchor Capital Advisors LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	54 contacts →
	Indirect evidence “At Anchor Capital Advisors LLC, a passion for our clients’ success defines our culture: finding value, building and preserving wealth-every day.” Source: RevenueBase Database · checked Sep 28, 2026
16	Copley Equity Partners LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	42 contacts →
	Partial evidence “Copley Equity Partners is a private investment firm based in Boston, MA, and Denver, CO.” Source: RevenueBase Database · checked Sep 28, 2026
17	Whale Rock Capital Management LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Whale Rock Capital Management LLC is an Investment Adviser based in Boston.” Source: RevenueBase Database · checked Sep 28, 2026
18	Shepherd Kaplan Krochuk, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	32 contacts →
	Partial evidence “Shepherd Kaplan Krochuk, LLC (SKK) offers a wide variety of wealth management services, along with alternative asset investment capabilities.” Source: RevenueBase Database · checked Sep 28, 2026
19	Frontier Capital Management Company, LLC	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Founded in 1980, Frontier Capital Management Company, LLC is a Boston-based investment management firm specializing in small-cap, smid-cap and mid-cap companies” Source: RevenueBase Database · checked Sep 28, 2026
20	Guidepost Growth Equity	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Guidepost Growth Equity is a leading growth equity firm that partners with technology companies offering innovative solutions in large, dynamic markets including tech-enabled…” Source: RevenueBase Database · checked Sep 28, 2026
21	Polaris Capital Management, LLC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “VALUE INVESTING + GLOBAL MARKETS This combination delivers strong long-term performance to our clients.” Source: RevenueBase Database · checked Sep 28, 2026
22	Winslow, Evans & Crocker, INC	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	51-200	24 contacts →
	Indirect evidence “Experience.” Source: RevenueBase Database · checked Sep 28, 2026
23	Invenomic Capital Management LP	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “Invenomic Capital Management employs a disciplined, fundamentally-driven research process to build a diversified portfolio of primarily U.S.” Source: RevenueBase Database · checked Sep 28, 2026
24	Martingale Asset Management	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Martingale Asset Management, founded in 1987 and based in Boston, manages equity portfolios for many of the world’s most demanding corporate pension plans, foundations…” Source: RevenueBase Database · checked Sep 28, 2026
25	Essex Investment Management Company, LLC	Strong evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Strong evidence “Essex Investment Management Company, LLC is an SEC registered investment adviser that manages growth equity portfolios for institutional clients (including corporations…” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: growth stock investment firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names growth stock investment firms.
Partial evidence: Its own public description names part of growth stock investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name growth stock investment firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 89 growth stock investment firms based in Boston, United States

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Growth stock investment firms based in Boston, United States at a glance

As of Sep 28, 2026

36.6%Verified-email coverage

123.3Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Boston, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 89 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 growth stock investment firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “growth stock investment firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names growth stock investment firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among growth stock investment firms, 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 its RevenueBase Smart Search 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, 4,021 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 28, 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.

Growth stock investment firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names growth stock investment firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many growth stock investment firms are there based in Boston, United States?

RevenueBase identified 89 growth stock investment firms 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?

MFS Investment Management, headquartered in Boston, tops this list with the largest team on record.

Which city in the United States has the most growth stock investment firms?

New York leads the United States with 330 headquartered companies, followed by San Francisco (97) and Boston (89).

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 4,021 verified decision-maker contacts tracked across these 89 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 28, 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 Smart Search, 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.