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HARTFORDBUSINESS.COM | MARCH 9, 2026 23 LARGEST FAMILY-OWNED BUSINESSES Ranked by number of statewide employees, then year founded The Lists Largest family-owned businesses Ranked by number of statewide employees, then year founded Business Conn.-based employees/ companywide Generations active (1) Type of business Head(s) of company Year founded 1 SMG Corporate Services 25 Controls Drive, Shelton 06484 800-688-1707 • smgcorporateservices.com 3,001 4,000 3rd, 4th Cleaning, janitorial and property maintenance services, security guard service, training and background screening services Scott Weintraub President 1924 2 DATTCO Inc. (2) 583 South St., New Britain 06051 860-229-4878 • dattco.com 1,795 2,525 3rd Transportation, vehicle sales and service, fleet management, charter services and tours nationwide Donald DeVivo President 1924 3 Trefz Corp. 10 Middle St., Bridgeport 06604 203-367-3621 • trefzmcdonalds.com 1,000 N/A 3rd Operator of fifty McDonald's restaurants Josie Trefz Paul Trefz Christian Trefz owners 1964 4 O&G Industries Inc. 207 Main St., Suite 200, Hartford 06106 860-489-9261 • ogind.com 827 834 4th Building and road construction services, mason products and construction materials David Oneglia President 1923 5 Data Mail Inc. 240 Hartford Ave., Newington 06111 860-666-0399 • data-mail.com 800 800 2nd Direct marketing firm Bruce Mandell CEO & owner 1971 6 Stew Leonard's 100 Westport Ave., Norwalk 06851 203-847-7214 • stewleonards.com 773 2,500 2nd, 3rd Grocery stores, wine & spirits Stew Leonard President & CEO Blake Leonard President, Stew Leonard's Wines & Spirits Jake Tavello COO, Stew Leonard's 1969 7 Allied Printing Services Inc. 1 Allied Way, Manchester 06042 860-643-1101 • alliedprinting.com 520 520 3rd Commercial printing, binding products and services John Sommers President & CEO 1949 8 Connecticut Spring & Stamping Corp. 48 Spring Lane, Farmington 06032 860-677-1341 • ctspring.com 400 400 2nd, 3rd Manufacturer of springs, stampings, four slide and machined components Peter Youmans CEO 1939 9 Ulbrich Stainless Steels & Special Metals Inc. 1 Dudley Ave., Wallingford 06492 203-239-4481 • ulbrich.com 350 800 3rd, 4th Manufacturer of precision re-rolled strip and foil & also fine, flat, round and shaped wire of stainless steel & special metals Chris Ulbrich Chairman of the board Jonathan Ulbrich CEO 1924 10 The Lyman Farm Inc. 7 Lyman Road, Middlefield 06455 860-349-6000 • lymanorchards.com 330 330 8th Farm with corn maze, pick your own, the Apple Barrel, Lyman Golf, 1741 Pub & Grill John Lyman III Executive vice president 1741 11 Siemon Co. 101 Siemon Company Drive, Watertown 06795 860-945-4200 • siemon.com 250 500 5th Design and manufacture of high-performance connectivity solutions for data centers and smart buildings Henry Siemon President & CEO 1903 12 Ferguson 112 Northwest Drive, Plainville 06062 860-747-4566 • fergusoncontractors.com 250 (3) 275 (3) 4th, 5th Specialty contractor Ryan Ferguson President 1925 13 TOMZ Corp. 47 Episcopal Road, Berlin 06037 860-829-0670 • tomz.com 250 250 2nd Manufacturer of medical devices Tom Matulaniec CEO 1988 14 S&S Worldwide Inc. 75 Mill St., Colchester 06415 800-243-9232 • ssww.com 235 250 5th Toys and educational supplies Adam Schwartz Hy Schwartz Co-presidents 1906 15 Creed Monarch 1 Pucci Park, New Britain 06051 860-826-4000 • creedmonarch.com 230 230 3rd Manufacturer of CNC-machined components and assemblies for commercial and industrial applications Andrew Creed President 1953 16 Laticrete One Laticrete Park North, Bethany 06524 203-393-4510 • laticrete.com 230 2,500 3rd Manufacturer of construction materials Patrick Millot CEO Faisal Saleem President & COO, International Division Ron Nash President & COO, North America Division 1956 17 FCP Euro LLC 155 Hill St., Suite 7, Milford 06460 860-388-9001 • fcpeuro.com 223 347 2nd Online auto-parts retailer serving owners of European cars Scott Drozd CEO Nick Bauer President & founder 1986 18 Specialty Printing LLC 123 Day Hill Road, Windsor 06088 877-901-7732 • specialty.inc 215 N/A N/A Manufacturer of labeling solutions William Bailey CEO 1978 19 Birk Manufacturing Inc. 14 Capitol Drive, East Lyme 06333 860-739-4170 • birkmfg.com 175 175 1st, 2nd Design & manufacturing of flexible heaters, temperature sensors, controllers and thermal systems for medical, semiconductor, aerospace and defense Norman Birk CEO 1989 20 Earthlight Technologies LLC 128 West Road, Ellington 06029 860-871-9700 • earthlighttech.com 140 175 2nd Commercial & residential solar solutions Sam Schneider Co-founder & CEO 2008 21 International Cordage East, dba InCord 226 Upton Road, Colchester 06415 860-537-1414 • incord.com 115 115 2nd, 3rd Textile manufacturing, safety netting Meredith Ritz Shay CEO & owner Robin Ritz VP, Sales & marketing 1995 22 Har-Conn Chrome Co. 603 New Park Ave., West Hartford 06110 860-236-6801 • har-conn.com 105 N/A 3rd, 4th Aerospace metal finishing Tim Backus President & CEO 1948 23 Goodway Technologies 420 West Ave., Stamford 06902 203-359-4708 • goodway.com 105 139 2nd, 3rd Specialty maintenance and sanitation services for HVAC, manufacturing, food and beverage energy and more Tim Kane President & CEO 1966 Source: Hartford Business Journal 2025 surveys with some updates from Q1 2026, annual reports, press releases and company websites. Note: Unable to confirm data by press time for Bozzuto's Inc. in Cheshire or Plainville's Manafort Bros. Shelton's Inline Plastics Corp. did not disclose employee counts. N/A = Not available. (1) Some businesses changed ownership throughout their history, but have remained family-owned. (2) School bus division shuttles over 140,000 students across Conn. and R.I. daily. Subsidiaries are DeVivo Cos., Thermo King Northeast, Northeast Tool and New England Truckmaster. (3) Data from 2024 survey. -Compiled by Stephanie R. Meagher, research@nebusinessmedia.com