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The 86 largest companies in Greenwich

Tamtam tracks 86 companies headquartered in Greenwich. This list ranks all of them by number of employees on LinkedIn, led by XPO, GXO Logistics, Inc. and Interactive Brokers. Their median headcount is 48. Half of them were founded in 2005 or later.

馃嚭馃嚫 Greenwich86 companiesUpdated Oct 24, 2026
#CompanyIndustryHeadquarters EmployeesFounded
1
XPOxpo.com

A global transportation company offering top-tier solutions to leading companies, with diverse opportunities for career growth and impactful work

Truck Transportation 馃嚭馃嚫 Greenwich 38,917 n/a
2
GXO Logistics, Inc.gxo.com

Providing innovative opportunities in logistics through advanced automation, benefiting customers, employees, and investors alike

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Greenwich 36,174 n/a
3
Interactive Brokersinteractivebrokers.com

Provides automated trade execution and custody for diverse financial instruments across global markets, offering advanced tools and research at low cost.

Financial Services 馃嚭馃嚫 Greenwich 3,506 n/a
4
W. R. Berkley Corporationberkley.com

Holding company for insurance and reinsurance businesses, specializing in niche markets globally with property casualty coverage in the United States.

Insurance 馃嚭馃嚫 Greenwich 2,624 1967
5
Zinniazinnia.com

The company simplifies life and annuity processes through technology, empowering clients to innovate, launch products faster, and better serve customers

Software Development 馃嚭馃嚫 Greenwich 2,494 2005
6
Not Availablefifthstreetfinance.com

A credit-focused asset manager providing innovative financing solutions to small and mid-sized businesses through various investment vehicles and co-investment capabilities

Financial Services 馃嚭馃嚫 Greenwich 2,277 1998
7
Clipper Logistics plcgxo.com

Specializes in contract logistics services as part of the world's largest pure-play contract logistics company, GXO.

Warehousing and Storage 馃嚭馃嚫 Greenwich 1,472 n/a
8
Greenwich Hospitalgreenwichhospital.org

A progressive regional hospital in Connecticut and New York, affiliated with Yale University School of Medicine, offering advanced care and career opportunities

Hospitals and Health Care 馃嚭馃嚫 Greenwich 1,458 1903
9
Cedar Gate Technologiescedargate.com

A technology and services platform empowering healthcare organizations to excel at value-based care, with actionable analytics and solutions improving care delivery

IT Services and IT Consulting 馃嚭馃嚫 Greenwich 1,191 2014
10
AQR Capital Managementaqr.com

Global investment management firm combining economics, behavioral finance, data, and technology to optimize client portfolio performance worldwide.

Financial Services 馃嚭馃嚫 Greenwich 957 1998
11
Blue Sky Studiosdisney.com

An award-winning feature-animation studio known for producing diverse and relatable CG animated films, including Ice Age, Rio, and Ferdinand Next releases: Spies in Disguise and Nimona

Animation and Post-production 馃嚭馃嚫 Greenwich 771 n/a
12
Greenwich Public Schoolsgreenwichschools.org

Operates public schools from kindergarten through high school, including neighborhood, magnet, and alternative programs, plus a tuition-based preschool for residents and employees.

Primary and Secondary Education 馃嚭馃嚫 Greenwich 525 n/a
13
Silver Point Capital, L.P.silverpointcapital.com

Leading global credit investing firm with a dedicated team, overseeing billions in assets across direct lending, liquid performing credit, and special situations investment strategies.

Financial Services 馃嚭馃嚫 Greenwich 441 2002
14
The Town of Greenwich, CTgreenwichct.gov

A premier residential community on Long Island Sound, offering 8,000 acres of protected land, top schools, cultural events, and thriving industries

Government Administration 馃嚭馃嚫 Greenwich 435 1640
15
L Cattertonlcatterton.com

investment firm managing equity capital across private equity, credit, and real estate, partnering with consumer brand management teams

Investment Management 馃嚭馃嚫 Greenwich 429 1989
16
Greenwich Country Day Schoolgcds.net

Co-ed independent school in Greenwich, CT prepares Nursery through Grade 12 students for college and beyond as ethical, confident leaders

Primary and Secondary Education 馃嚭馃嚫 Greenwich 357 1926
17
Brunswick Schoolbrunswickschool.org

A college-preparatory day school for boys offering education from Pre-K to grade 12, focusing on academic rigor, character development, and self-discipline

Primary and Secondary Education 馃嚭馃嚫 Greenwich 349 1902
18
Sacred Heart Greenwichshgreenwich.org

Empowering all-girls' Catholic school in Connecticut offering a rigorous academic program and global educational opportunities to develop confident, intelligent, and compassionate leaders

Education Administration Programs 馃嚭馃嚫 Greenwich 326 1848
19
Gifted Handsgiftedhandsshop.com

Gifted Hands is a boutique in Greenwich, CT featuring local designers and artisans offering unique clothing, jewelry, accessories, and gifts

Retail 馃嚭馃嚫 Greenwich 317 2010
20
XFLtheufl.com

The company merged with the USFL to create the United Football League, delivering fan-first, innovative professional football experiences beginning in 2024

Spectator Sports 馃嚭馃嚫 Greenwich 303 n/a
21
Marc Fisher Footwearmarcfisherfootwearcorp.com

A leading fashion footwear designer and marketer with over 100 years of experience, known for high-quality products sold worldwide

Retail Apparel and Fashion 馃嚭馃嚫 Greenwich 294 2005
22
WINwinfertility.com

The company provides comprehensive family-building and well-being solutions, including fertility support, surrogacy, adoption, menopause support, parenting resources, and more

Hospitals and Health Care 馃嚭馃嚫 Greenwich 292 1997
23
Strategic Value Partnerssvpglobal.com

global alternative investment firm specializing in special situations, private equity, opportunistic credit, and financing opportunities with operational expertise

Investment Management 馃嚭馃嚫 Greenwich 274 2001
24
Stone Point Capitalstonepoint.com

Investment firm in Greenwich, CT with $45B assets under management targeting financial services industry investments through private equity, credit funds, and financing solutions

Financial Services 馃嚭馃嚫 Greenwich 254 n/a
25
Wrmc Incomcoh.org

Provider of aging services that assists individuals in aging respectfully, offering trusted support and care through a variety of services

Hospitals and Health Care 馃嚭馃嚫 Greenwich 225 n/a
26
XPO Logistics (5)xpo.com

A global provider of transportation and logistics services including truckload brokerage, last mile logistics, supply chain solutions, warehousing, and global forwarding

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Greenwich 191 2011
27
Silver Point Capitalsilverpointcapital.com

Distressed debt and credit-focused private investment firm in Greenwich, CT, investing in complex situations requiring deep analysis and expertise

Investment Management 馃嚭馃嚫 Greenwich 189 2002
28
Berkley Re (a Berkley Company)berkleyre.com

Global reinsurance provider offering treaty and facultative reinsurance solutions to insurance companies and self-insured businesses worldwide through local experts in key regions

Insurance 馃嚭馃嚫 Greenwich 183 n/a
29
Greenwich High Schoolghs.greenwichschools.org

A collaborative community of learners focused on academic excellence, integrity, and responsibility at a Primary/Secondary school in Greenwich, Connecticut

Primary and Secondary Education 馃嚭馃嚫 Greenwich 180 n/a
30
LNR Property LLCstarwoodpropertytrust.com

A pioneering commercial real estate company with expertise in CMBS investments, asset management, direct equity investing, and real estate development

Real Estate 馃嚭馃嚫 Greenwich 178 n/a
31
Orthopaedic and Neurosurgery Specialistsonsmd.com

Specializing in orthopedics, neurosurgery, sports medicine, and rehabilitation, the company provides comprehensive patient-centered care with sub-specialty trained physicians in multiple locations

Medical Practices 馃嚭馃嚫 Greenwich 168 1998
32
The Richman Grouptherichmangroup.com

A major player in the residential property sector, with a nationwide presence and extensive portfolio spanning 49 states and several territories

Real Estate 馃嚭馃嚫 Greenwich 167 1987
33
Atlas Holdings LLCatlasholdingsllc.com

A diversified group of manufacturing, distribution, service, and trading businesses under the Atlas Holdings umbrella

Investment Management 馃嚭馃嚫 Greenwich 166 2002
34
Delamar Hotel Collectiondelamar.com

A collection of elegant hotels offering elevated experiences through art, history, spa services, fine dining, and unique event spaces

Hospitality 馃嚭馃嚫 Greenwich 160 2002
35
Capital Logistics, LLCinternational.capitallogisticsllc.com

Global third-party logistics provider specializing in temperature controlled freight, offering domestic and international freight forwarding and customs brokerage services.

Transportation, Logistics, Supply Chain and Storage 馃嚭馃嚫 Greenwich 89 2009
36
Edgewood Management LLCedgewood.com

Management of large cap growth portfolios focusing on high-quality companies with strong earnings, balance sheets, and long-term investment horizons.

Investment Management 馃嚭馃嚫 Greenwich 80 1974
37
Paloma Partners Management Companypaloma.com

A multi-strategy investment adviser focusing on generating long-term, low correlated returns by partnering with innovative investment talent globally

Financial Services 馃嚭馃嚫 Greenwich 77 1981
38
Weeden & Co.pipersandler.com

A trusted institutional trading firm since 1922, offering premier execution services with a focus on client relationships, senior management involvement, and a partnership-based culture

Financial Services 馃嚭馃嚫 Greenwich 75 1922
39
Kline Hill Partnersklinehill.com

Private equity secondary market investor acquiring limited partnership interests in buyout and venture funds, as well as direct company interests on a secondary basis

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 72 2015
40
Axiom Investorsaxiominvestors.com

Employee-owned investment management firm with a dynamic growth approach based in Greenwich, CT, specializing in global, international, and emerging market equity portfolios

Investment Management 馃嚭馃嚫 Greenwich 67 1998
41
Leverage Shares EUleverageshares.com

A European leader in leveraged and inverse exchange traded products, offering magnified exposure for experienced traders through physical replication Capital at risk

Financial Services 馃嚭馃嚫 Greenwich 53 2017
42
Greenbriar Equity Groupgreenbriarequity.com

Specializing in private equity investments, this firm has over 20 years of experience collaborating with middle market businesses in specific sectors

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 51 1999
43
Chatsworth Securities LLCchatsworthgroup.com

Investment banking firm specializing in advisory services, private capital raising, M&A, IPOs, and equity offerings across high-growth industries.

Investment Banking 馃嚭馃嚫 Greenwich 48 1996
44
Spencer Trask & Co.spencertraskco.com

An advanced technology development firm that discovers innovative ideas and helps entrepreneurs build world-changing ventures in various industries

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 41 n/a
45
INDATAindataipm.com

Provider of software, technology, and services for buy-side firms, offering trade order management, compliance, portfolio accounting, and front-to-back office solutions for institutional investors worldwide

Software Development 馃嚭馃嚫 Greenwich 38 n/a
46
Southfield Capitalsouthfieldcapital.com

Private equity firm investing in growing North American companies in the lower middle market with $4-15 million EBITDA, strong leadership, and attractive growth and profitability trends

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 38 2005
47
Glade Brook Capital Partners LLCgladebrookcapital.com

Global investment firm specializing in internet and software sectors, providing growth equity and private credit to tech companies from growth stage to IPO

Investment Management 馃嚭馃嚫 Greenwich 31 2011
48
ParaFi Capitalparafi.com

Alternative asset management firm specializing in hedge fund and venture capital strategies within the digital asset ecosystem Trusted by global institutions since 2018

Investment Management 馃嚭馃嚫 Greenwich 30 2018
49
Sterling Investment Partnerssterlinglp.com

Middle market private equity firm investing in companies with strong growth potential, supporting management teams in accelerating growth and building operational capabilities in targeted sectors

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 30 1991
50
Sageview Capitalsageviewcapital.com

Private investment firm partnering with innovative software and tech businesses, leveraging experience and networks to scale companies successfully.

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 29 2005
51
Starwood Energy Groupstarwoodenergygroup.com

Energy infrastructure investment firm specializing in natural gas and renewable power generation, transmission assets, managing over $2 billion in equity commitments

Investment Management 馃嚭馃嚫 Greenwich 27 2005
52
Activant Capitalactivantcapital.com

Global investment firm partnering with high-growth companies transforming commerce worldwide

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 26 2015
53
CenterBook Partners LPcenterbook.com

A multinational firm specializing in alternative investments on a global scale

Investment Management 馃嚭馃嚫 Greenwich 25 2020
54
RCB FUND SERVICES LLCrcbfundservices.com

Financial services company headquartered in Greenwich, Connecticut, offering a range of services in the financial industry

Financial Services 馃嚭馃嚫 Greenwich 24 n/a
55
DBidbi.co

New York-based investment management firm specializing in liquid alternative strategies aiming to outperform hedge fund indices using futures and ETFs

Financial Services 馃嚭馃嚫 Greenwich 24 2012
56
Plainfield Asset Managementpfam.com

An investment management firm based in Connecticut, managing capital for institutions and high net worth individuals in the US and abroad

Financial Services 馃嚭馃嚫 Greenwich 24 2005
57
Gallatin Point Capital LLCgallatinpoint.com

A private investment firm specializing in making opportunistic investments in financial institutions, services, and assets to generate attractive risk-adjusted returns

Financial Services 馃嚭馃嚫 Greenwich 23 2017
58
The Silverfern Groupsilfern.com

Global middle-market investment management firm making direct investments globally in Americas and Asia-Pacific with a strong network for non-correlated opportunities Visit website for more information

Investment Management 馃嚭馃嚫 Greenwich 21 n/a
59
Forward Consumer Partnersforwardconsumerpartners.com

Private equity firm investing in growing consumer brands, providing resources and collaboration to help brands reach their potential

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 21 2023
60
Manfredi Jewelsmanfredijewels.com

Luxury fine jewelry and timepiece retailer offering an unparalleled collection of exquisite jewels, over 30 brands of watches, and exclusive jewelry creations

Retail Luxury Goods and Jewelry 馃嚭馃嚫 Greenwich 20 1988
61
Decisive Pointdecisivepoint.com

Venture capital firm investing in deep-tech innovations across security, health, energy, and infrastructure, supporting those solving tomorrow's challenges with strategic capital and expertise

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 20 2018
62
ECP Growthecpgrowth.com

A private investment firm in Connecticut and Europe, focusing on high-potential consumer products and services companies for strategic investment alliances and sustainable value creation

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 20 2009
63
Prostar Capitalprostarcapital.com

Private investment firm specializing in midstream infrastructure assets within the energy supply chain, strategically located to meet global energy demand

Financial Services 馃嚭馃嚫 Greenwich 19 2012
64
Alinda Capital Partners LLCastatineip.com

Infrastructure investment firm managing over $7 billion in funds, focusing on stable, long-term assets in North America and Europe, with experienced team and global presence

Investment Management 馃嚭馃嚫 Greenwich 19 2005
65
QFS Asset Management, L.P.qfsfunds.com

A leading asset and risk management firm providing superior non-correlated returns across major asset classes, with expertise in customized solutions

Financial Services 馃嚭馃嚫 Greenwich 16 1988
66
Good Hill Partners LPgoodhillpartners.com

Private investment firm specializing in structured products and fixed income markets, managing capital for clients with diverse return and liquidity profiles Committed to transparency and fiduciary standards

Investment Management 馃嚭馃嚫 Greenwich 15 2006
67
qTechnology

A tech startup that utilizes AI, machine learning, and optimization through cloud and decentralized technology to develop proprietary platforms and products

Software Development 馃嚭馃嚫 Greenwich 15 2008
68
10T Holdings10tfund.com

Investing in growth stage private companies in the digital asset ecosystem, focusing on blue-chip companies that will shape the future

Investment Management 馃嚭馃嚫 Greenwich 14 2019
69
Cardinal Capital Management, L.L.C.cardcap.com

An established investment firm specializing in small and mid-cap value equity investing, focused on producing high-quality results using a free cash flow driven strategy

Investment Management 馃嚭馃嚫 Greenwich 13 1995
70
Access Anvil Corp.accessinstalll.com

A provider of superior fence, gate, and gate operator installations in the Northeast US, offering hard-to-find products and 24-hour maintenance contracts since 1975

Construction 馃嚭馃嚫 Greenwich 11 1975
71
Gaia Restaurant

A restaurant located in Greenwich, CT, Gaia offers a dining experience with a focus on quality food and exceptional service

Restaurants 馃嚭馃嚫 Greenwich 11 n/a
72
Endeavour Capital Advisors Inc.endcap.com

Boutique asset management firm in Greenwich, CT investing in financial services sector through public and private equities

Investment Management 馃嚭馃嚫 Greenwich 11 1994
73
Whitehaven Asset Management, LPwhitehavenlp.com

This company offers municipal investment advisory and portfolio management services to its clients

Financial Services 馃嚭馃嚫 Greenwich 10 n/a
74
Deccan Value Investors L.P.deccanvalue.com

This company offers investment management and advisory services to top endowments, foundations, and family offices worldwide

Investment Management 馃嚭馃嚫 Greenwich 8 2004
75
BLKBRD Asset Management, LPblkbrdlp.com

Specializing in systematic investment strategies, our company enhances alpha through quantitative research and advanced technology, striving for optimized risk-adjusted returns

Investment Management 馃嚭馃嚫 Greenwich 8 2023
76
Berkley Aviation (a Berkley Company)berkley.com

The company offers a variety of insurance and reinsurance products through its operating units Visit the website for more information

Insurance 馃嚭馃嚫 Greenwich 6 2005
77
Engle Capital Management, LPenglecap.com

A New York-based investment firm focusing on long and short positions in global equities through fundamental research to generate high returns and preserve capital

Investment Management 馃嚭馃嚫 Greenwich 6 2014
78
Victoria Capital Investmentsvictoriacapinvestments.com

An asset investment group specializing in venture capital investing, small business creation/management, aiming to incite opportunity through connection and communication

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 6 n/a
79
Phoenix Intelligencephoenix-intel.com

This company offers energy procurement, weather consulting, budget analysis, utility audits, group energy buying, and green energy purchases for businesses

Oil and Gas 馃嚭馃嚫 Greenwich 5 n/a
80
Vollert Capitalvollertcapital.com

A premier investment management firm providing customized solutions with experienced professionals focusing on research, analysis, and risk management strategies

Investment Management 馃嚭馃嚫 Greenwich 5 n/a
81
R3 Venture Partnersr3vp.com

Early-stage venture capital fund investing in post-Seed to Series A rounds, with active involvement in management of targeted companies

Venture Capital and Private Equity Principals 馃嚭馃嚫 Greenwich 4 n/a
82
Titanite Investment Management LPtitanitecapital.com

Investment firm targeting transformative biotech and medtech advancements, focusing on small and midcap US equity investments

Investment Management 馃嚭馃嚫 Greenwich 4 2021
83
Alius Groupalius-group.com

Global financial services provider offering management, technology, and implementation services to solve complex challenges with innovative technology and regulatory expertise

IT Services and IT Consulting 馃嚭馃嚫 Greenwich 3 2010
84
Citrine Power, LLCcitrinepower.com

A renewable energy developer and investor specializing in solar and battery solutions for commercial and public properties, committed to sustainability and community partnerships

Renewable Energy Semiconductor Manufacturing 馃嚭馃嚫 Greenwich 2 2018
85
One Three One Partners

An investment firm focusing on generating risk-adjusted returns by investing in technology and consumer sectors through operational growth and prudent capital allocation

Investment Management 馃嚭馃嚫 Greenwich 1 2019
86
Phillimore Investments LPphillimore.com

Global macro asset management firm headquartered in Greenwich, Connecticut with a focus on investment strategies for clients worldwide

Investment Management 馃嚭馃嚫 Greenwich 1 2017

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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 24, 2026.

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