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The 100 Largest Companies In Connecticut For 2024

By Chris Kolmar
Mar. 19, 2024

If you live in Connecticut and you’re looking for a job, you have come to the right place.

Because, sure, you can google things like ‘biggest companies in Connecticut’ and get a fairly long list of companies with a lot of employees, or perhaps that have the biggest names — but here, we bring you the companies with the most current employees that are actually headquartered in Connecticut.

Below, we’ll give you a complete list of Connecticut’s 100 largest companies, but first, here’s a look at the top 10:

  1. Validus DC Systems (Jobs)

  2. Bollore Inc (Jobs)

  3. Alstom (Jobs)

  4. Amphenol (Jobs)

  5. Cigna (Jobs)

  6. ABCorp (Jobs)

  7. OTIS POLSKA (Jobs)

  8. Stanley Black & Decker (Jobs)

  9. Carrier (Jobs)

  10. Boehringer Ingelheim (Jobs)

Validus DC Systems comes in at the top, with more current employees than any other company in the state. We’ll get to specifics in a moment; first, here’s a look at our methodology.

How we identified the biggest companies in Connecticut

Here at Zippia we have developed a database of over 250,000 companies that spans the entire country.

For this report, we looked at the companies headquartered in Connecticut with at least 100 employees. That left us with 1,203 companies.

We then ranked each company from most to least current employees to determine the biggest companies in Connecticut.

As it turns out, Validus DC Systems looks to the be the biggest company in Connecticut clocking in with 100,000 employees.

Now, check out how the 100 biggest companies in Connecticut ranked.

Detailed List Of The 100 Biggest Companies In Connecticut

Rank Company City Employees Jobs
1 Validus DC Systems Brookfield 100,000 Jobs
2 Bollore Inc Killingly 79,000 Jobs
3 Alstom Windsor 75,000 Jobs
4 Amphenol Wallingford 74,000 Jobs
5 Cigna Bloomfield 73,800 Jobs
6 ABCorp Stamford 70,000 Jobs
7 OTIS POLSKA Farmington 68,078 Jobs
8 Stanley Black & Decker New Britain 61,000 Jobs
9 Carrier Farmington 56,000 Jobs
10 Boehringer Ingelheim Ridgefield 52,391 Jobs
11 ASSA ABLOY Group New Haven 50,934 Jobs
12 Aetna Hartford 47,950 Jobs
13 XPO Logistics Greenwich 44,000 Jobs
14 Prudential Retirement Insurance And Annuity Co On Behalf Of Its Separate Account Ssa-4642 Fire Hartford 41,671 Jobs
15 Pratt & Whitney East Hartford 38,737 Jobs
16 Legrand West Hartford 37,000 Jobs
17 Intercontinental Holding Company, Inc. Cheshire 35,330 Jobs
18 EMCOR Group Norwalk 33,000 Jobs
19 LAZ Parking Hartford 30,000 Jobs
20 United HealthCare Insurance Company Hartford 30,000 Jobs
21 Harman International Stamford 30,000 Jobs
22 Centerplate Ultimate Holdings Corp Stamford 29,060 Jobs
23 Ica Glastonbury 28,000 Jobs
24 Praxair Danbury 26,461 Jobs
25 Xerox Norwalk 24,700 Jobs
26 SS&C Technologies Windsor 24,600 Jobs
27 Louis Dreyfus Company Wilton 22,000 Jobs
28 Beiersdorf Wilton 20,059 Jobs
29 Hubbell Shelton 19,700 Jobs
30 The Hartford Hartford 19,500 Jobs
31 Booking Holdings Norwalk 19,400 Jobs
32 United Rentals Stamford 18,800 Jobs
33 Hamilton Sundstrand Windsor Locks 17,158 Jobs
34 Hamilton Sundstrand Space Systems International Inc. Windsor Locks 17,158 Jobs
35 Gartner Stamford 16,724 Jobs
36 Synchrony Financial Stamford 16,500 Jobs
37 Frontier Communications Norwalk 16,200 Jobs
38 Daymon Worldwide Stamford 16,000 Jobs
39 ebm-papst Farmington 15,058 Jobs
40 Platt Brothers & Co Waterbury 15,000 Jobs
41 Pitney Bowes Stamford 14,700 Jobs
42 TRUMPF Farmington 13,420 Jobs
43 Silgan Holdings Stamford 12,515 Jobs
44 Crane Co. Stamford 11,000 Jobs
45 FactSet Norwalk 10,892 Jobs
46 Terex Westport 10,700 Jobs
47 Trinity Health of New England Hartford 10,001 Jobs
48 AMETEK Specialty Metal Products Wallingford 10,001 Jobs
49 Spectrum Business Stamford 10,001 Jobs
50 Capitol Light Hartford 10,001 Jobs
51 Laurel Road Bridgeport 10,001 Jobs
52 ASSA ABLOY Door Security Solutions – US New Haven 10,001 Jobs
53 Cyient East Hartford 10,000 Jobs
54 Henkel Rocky Hill 9,000 Jobs
55 Fairfax Stamford 8,200 Jobs
56 Eversource Energy Hartford 8,084 Jobs
57 Nestlé Waters North America Stamford 8,000 Jobs
58 FirstLight Hydro Generating Company Hartford 7,520 Jobs
59 The Town Of Greenwich, Ct Greenwich 7,500 Jobs
60 Diageo Americas Supply, Inc. Norwalk 7,500 Jobs
61 Hartford Hospital Hartford 7,500 Jobs
62 Syncronys Intl Inc Stamford 7,500 Jobs
63 Yale New Haven Health New Haven 7,500 Jobs
64 PrivacyGuard Stamford 7,500 Jobs
65 Connecticut Children’s Medical Center Hartford 7,500 Jobs
66 W. R. Berkley Old Greenwich 7,448 Jobs
67 XL America Inc Stamford 7,400 Jobs
68 Genesee & Wyoming Darien 7,300 Jobs
69 Cenveo Stamford 7,300 Jobs
70 Providence Service Stamford 7,100 Jobs
71 Yale University New Haven 7,056 Jobs
72 Timex Group Middlebury 7,000 Jobs
73 Hexcel Stamford 7,000 Jobs
74 Tronox Stamford 7,000 Jobs
75 AVANGRID Orange 7,000 Jobs
76 Various Companies Greenwich 6,985 Jobs
77 Littlejohn & Co Greenwich 6,860 Jobs
78 Bic Corporation Shelton 5,985 Jobs
79 NeoPost USA Milford 5,800 Jobs
80 FKI Industries Inc. Fairfield 5,630 Jobs
81 The Earth Technology Corporation (USA) North Haven 5,379 Jobs
82 People’s United Bank Bridgeport 5,188 Jobs
83 Kaman Bloomfield 5,007 Jobs
84 Barnes Aerospace Windsor 5,000 Jobs
85 Barnes Group Bristol 5,000 Jobs
86 Subway Milford 5,000 Jobs
87 Stolt-Nielsen Limited Norwalk 5,000 Jobs
88 Hartford Courant Hartford 5,000 Jobs
89 Purdue Pharma L.P. Stamford 5,000 Jobs
90 UST Stamford 4,610 Jobs
91 Lane Industries Incorporated Cheshire 4,500 Jobs
92 Talcott Resolution Windsor 4,300 Jobs
93 Pritchard Industries, Inc. New Haven 4,062 Jobs
94 Tri State Business Systems Inc Hartford 4,000 Jobs
95 Veeder-Root Simsbury 4,000 Jobs
96 Agi Shorewood Gravure, LLC Stamford 3,850 Jobs
97 MRRC Hold Co Greenwich 3,800 Jobs
98 Conair Stamford 3,571 Jobs
99 New Insight Shelton 3,500 Jobs
100 Thomson Reuters U.S. LLC Stamford 3,500 Jobs

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Author

Chris Kolmar

Chris Kolmar is a co-founder of Zippia and the editor-in-chief of the Zippia career advice blog. He has hired over 50 people in his career, been hired five times, and wants to help you land your next job. His research has been featured on the New York Times, Thrillist, VOX, The Atlantic, and a host of local news. More recently, he's been quoted on USA Today, BusinessInsider, and CNBC.

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