| # | Company | Employees |
|---|---|---|
| 1 |
Wellington Managementwellington.com
Independent investment management firm serving diverse clients worldwide with comprehensive capabilities across global equity, fixed income, alternatives, and private markets. |
3,609 |
| 2 |
MFS Investment Managementmfs.com
Global investment manager offering active management, disciplined investing, risk management, serving financial advisors, intermediaries, and institutional clients worldwide. |
2,971 |
| 3 |
Adventadventinternational.com
Global private equity investor founded in 1984 with $91 billion in assets under management, focusing on investments in various sectors across 42 countries |
1,339 |
| 4 | 1,022 | |
| 5 |
Eaton Vanceeatonvance.com
Provides disciplined, long-term investment management and wealth solutions through diverse strategies, serving clients worldwide with innovation and exemplary service. |
546 |
| 6 |
Audax Groupaudaxgroup.com
Alternative investment manager specializing in private equity, private debt, and strategic capital for middle market companies across multiple offices. |
471 |
| 7 |
Income Research + Managementincomeresearch.com
Privately owned independent firm providing fixed income investment management through security selection and risk management for institutional and private clients via boutique service. |
241 |
| 8 |
Geode Capital Managementgeodecapital.com
Boston based investment firm managing over one trillion dollars through systematic core beta exposures across equity and niche asset classes for global clients. |
237 |
| 9 |
BU Finance & Investment Clubbufcinvest.com
A student-run investment club managing a $11M long-only equity portfolio, focusing on small-to-mid cap domestic equities through fundamental security selection and risk management techniques |
180 |
| 10 |
Weiss Asset Managementweissasset.com
Value-based investment firm managing $29 billion for various investors, focusing on deep research, collaboration, integrity, rational decision making, and continuous learning |
171 |
| 11 |
Citisoftcitisoft.com
Specializing in operations and technology change for asset management firms, Citisoft delivers impactful solutions for complex business problems throughout the investment process |
119 |
| 12 |
Mellon Capitalmellon.com
A specialist multi-asset investment management firm dedicated to serving sophisticated investors, offering a range of capabilities under the brand Mellon |
116 |
| 13 |
Breckinridge Capital Advisorsbreckinridge.com
Provides high-quality investment management services to high-net-worth individuals and large institutions through financial advisors and consultants. |
95 |
| 14 |
HighVista Strategieshighvistastrategies.com
Employee-owned alternative asset manager in Boston since 2004, managing $10 billion globally Specializing in structurally inefficient markets for high-conviction investment opportunities |
95 |
| 15 |
Eventide Asset Managementeventideinvestments.com
A pioneering asset management firm focused on values-based investing through a biblical worldview, seeking to advance the global common good |
90 |
| 16 |
Trillium Asset Managementtrilliuminvest.com
Provides ESG-focused investment strategies and services, integrating values with active ownership to deliver long-term value and positive social impact. |
80 |
| 17 |
Welch & Forbes LLCwelchforbes.com
A full-service wealth management firm with over 180 years of experience, offering customized financial solutions, investment management, trust services, and personalized planning |
65 |
| 18 |
Boston Common Asset Managementbostoncommonasset.com
Active global equity investor focused on sustainable investing, women-led, employee-owned, and leader in shareholder engagement since 2003. |
54 |
| 19 |
Longfellow Investment Managementlongfellowim.com
Employee-owned investment management firm specializing in domestic fixed income, equity, and alternative strategies Focus on minimizing portfolio volatility for attractive long-term returns |
52 |
| 20 |
Anchor Capital Advisors LLCanchorcapital.com
A financial company focused on building and preserving wealth for clients through value investing, risk management, and providing customized client service |
49 |
| 21 |
Venture Guidesventureguides.com
early-stage infrastructure software investment firm providing strategic guidance, industry connections, and concentrated portfolio support for startup growth |
43 |
| 22 |
Battery Global Advisorsbga.com
An independent investment manager offering alternative solutions for institutional investors and accredited individuals, with roots tracing back to 2001 |
42 |
| 23 |
Merganser Capital Managementmerganser.com
An SEC-registered investment adviser founded in 1985, specializing in meeting the fixed income needs of institutional clients through fundamental analysis and risk management |
39 |
| 24 |
Reynders, McVeigh Capital Management, LLC.reyndersmcveigh.com
Manage over $4 billion in sustainable investments, offering personalized wealth management and actively managed strategies for individuals and institutions. |
36 |
| 25 |
Howland Capitalhowlandcapital.com
Independent wealth management firm offering tailored investment solutions for individuals, families, and institutions with a commitment to providing prudent and personal counsel |
35 |
| 26 |
RhumbLine Advisersrhumbline.com
Specializes in index-based investment management for institutional investors, providing expert financial guidance and solutions from its Boston, MA location. |
32 |
| 27 |
Tiger Iron Capitaltigerironcapital.com
Passionate institutional fund of funds manager focusing on venture capital, partnering with elite firms to invest in transformational companies |
28 |
| 28 |
Sverica Capital Managementsverica.com
A growth-oriented private equity firm investing in lower middle market companies with a focus on technology, software, healthcare, and advanced industrial sectors |
25 |
| 29 |
Venus Capital Management, Inc.venuscapital.com
Specializing in emerging markets, this institutional money management firm has an extensive infrastructure and strong relationships to source and analyze investment opportunities |
23 |
| 30 |
Prio Wealthpriowealth.com
A Boston-based independent Registered Investment Adviser that prioritizes client's financial and life goals with personalized wealth management and financial planning services |
22 |
| 31 |
TillieStar Compliance Solutions, Inctilliestar.com
Fintech consulting firm specializing in asset management, offering expert support for investment compliance, software implementations, and business-as-usual support since 2013 |
19 |
| 32 |
Birch Hill Investment Advisors LLCbhboston.com
Independent registered investment advisor providing wealth management services for individuals, families, trusts, and institutions with a clear, straightforward investment approach and a focus on client-specific objectives |
18 |
| 33 |
Zevin Asset Managementzevin.com
This socially responsible asset management company offers global, diversified portfolios and strategies aligned with clients' values, emphasizing sustainability and shareholder advocacy |
18 |
| 34 |
Cormorant Asset Management, LPcormorant-asset.com
Investment management firm in Boston, Massachusetts, specializing in asset management services |
17 |
| 35 |
Penobscot Investment Management Company, Inc.pimboston.com
This company offers investment management services to individuals, families, and non-profits, focusing on sound financial advice and effective communication with clients |
16 |
| 36 |
Verdad Advisersverdadcap.com
A global asset management firm prioritizing intellectual integrity through research to provide investors with high risk-adjusted returns across asset classes |
16 |
| 37 |
Clough Capitalcloughcapital.com
Global alternative asset management firm founded by Chuck Clough, focusing on developing proprietary insights for better client outcomes and unique investment solutions |
14 |
| 38 |
ShawSpring Partnersshawspring.com
A company pursuing long-term investments in technology, internet, and consumer sectors with a focus on industry leaders and high-growth businesses |
13 |
| 39 | 
Delta Partners, LPdeltamgt.com
An investment firm specializing in global equity funds, using a fundamental, bottom-up approach to diversify investments and generate returns |
11 |
| 40 |
GRT Capital Partners, LLCgrtcapital.com
A company specializing in active equity management, combining fundamental research, quantitative analysis, and experienced team members dedicated to client service |
10 |
| 41 |
Windhaven Investment Management, Inc.schwabassetmanagement.com
SEC-registered investment advisory firm diversifying portfolios for high net worth clients with global market exposure and proprietary risk management model |
8 |
| 42 |
South Shore Capital Advisorssscainvest.com
A global investment firm seeking opportunities worldwide to build diversified portfolios and reduce risk through a global balanced approach |
6 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 10, 2026.
More company lists in Boston
- The largest companies in Boston 988
- SaaS companies in Boston 179
- Software Development companies in Boston 131
- Financial Services companies in Boston 73
- Venture Capital and Private Equity Principals companies in Boston 72
- AI-native companies in Boston 49
- Higher Education companies in Boston 47
- IT Services and IT Consulting companies in Boston 45
- Hospitals and Health Care companies in Boston 43
- Non-profit Organizations companies in Boston 36
- Real Estate companies in Boston 33
- Business Consulting and Services companies in Boston 29
- Technology, Information and Internet companies in Boston 27