Form 5500 Plan Sponsors in Massachusetts
Page 337 of 343 · 34,234 sponsors (2020–2025).
Williams Flooring Corp
86-2452944Nantucket, MA·1 plan·2024, 2023, 2022, 2021Williams Paving LLC
82-5041753West Stockbridge, MA·1 plan·2024, 2023Williams Stone Co., INC.
04-2044378East Otis, MA·1 plan·2024, 2023, 2022, 2021, 2020Williamsmarston LLC
46-4311251Boston, MA·2 plans·2024, 2023, 2022, 2021, 2020Williamson Corporation
04-2213418Concord, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Williamstown Art Conservation Center
04-2629476Williamstown, MA·2 plans·2024, 2023, 2022, 2021, 2020Williamstown Physical Therapy
04-3513976Williamstown, MA·1 plan·2022, 2021Williamstown Theatre Foundation,
04-2237311Williamstown, MA·2 plans·2024, 2023, 2022, 2021, 2020Willie Ross School For The Deaf, INC.
04-2430193Longmeadow, MA·1 plan·2024, 2023, 2022, 2021, 2020Williston-Allen Associates In
05-0412006Mansfield, MA·1 plan·2024, 2023, 2022, 2021, 2020Willmott & Associates INC.
04-2770946Acton, MA·1 plan·2020Willow Hill School
04-2469268Sudbury, MA·1 plan·2024, 2023, 2022, 2021, 2020Willow Investment
27-0425839Pittsfield, MA·1 plan·2024, 2023, 2022, 2021, 2020Willow Street Family Practice, INC.
20-1842832Ipswich, MA·1 plan·2022, 2021, 2020Willow Tree Poultry Farm, INC.
04-2376596Attleboro, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Willows Associates Psychological And Counseling Services, INC.
04-3377592North Andover, MA·1 plan·2024Willwerth Plumbing And Heating
45-4996894Reading, MA·1 plan·2024, 2023, 2022, 2021, 2020Willwork, INC.
04-3057333South Easton, MA·1 plan·2024, 2023, 2022, 2021, 2020Wilmer Cutler Pickering Hale And Dorr LLP
04-1409810Boston, MA·3 plans·2024, 2023, 2022, 2021, 2020Wilmington Autobody And Collisio
33-2504314Wilmington, MA·1 plan·2024Wilmington Bodyworks And Colliss
86-1229058Wilmington, MA·1 plan·2023Wilmington Cold Storage, INC.
04-2549408Chestnut Hill, MA·1 plan·2020Wilmington Community Television
04-2969948Wilmington, MA·1 plan·2021, 2020Wilmington Masonry & Hardscape Supply Co., INC.
04-2643976North Reading, MA·1 plan·2024, 2023, 2022, 2021, 2020Wilmington Orthodontics, PC
04-3483040Wilmington, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Wilmington Pediatrics, INC.
04-3128789Wilmington, MA·1 plan·2024, 2023, 2022, 2021, 2020Wilson Butler Architects, INC.
04-3366566Boston, MA·1 plan·2024, 2023, 2022, 2021, 2020Wilson Farm, INC.
04-2168717Lexington, MA·2 plans·2024, 2023, 2022, 2021, 2020Wilson Group Realty, INC.
20-1040858Duxbury, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Wilson Language Training Corporation
04-3203255Oxford, MA·2 plans·2024, 2023, 2022, 2021, 2020Wilson Marino & Bonnevie PC
04-3323748Newton, MA·1 plan·2024, 2023, 2022, 2021, 2020Wilton Manufacturing Co., INC.
04-2226300Ware, MA·1 plan·2022, 2021, 2020Wimpy Kid INC
26-2700094Plainville, MA·2 plans·2024, 2023, 2022, 2021, 2020Win-It-Too, INC. DBA Global Beer Network
77-0370729Middleton, MA·2 plans·2024, 2025, 2023, 2022, 2021, 2020Winalytics LLC
46-5151624Boston, MA·1 plan·2024, 2025, 2023, 2022, 2021Winbourne Hampe Sheehan
04-2738903Dedham, MA·1 plan·2022, 2021, 2020Winbrook, INC.
04-2485380Billerica, MA·1 plan·2024, 2023, 2022, 2021, 2020Winch It Services LLC
87-4407155Pepperell, MA·1 plan·2024Winchendon School
05-0270487Winchendon, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Anesthesia Associates, INC.
04-2432049Brockton, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Chiropractic Center, LLC
82-2585091Woburn, MA·1 plan·2024, 2023, 2022, 2021Winchester Cleaning Corp.
82-1391302Winchester, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Country Club
04-1978080Winchester, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Emergency Medical, P.C.
04-3484803Brockton, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Financial Group, INC.
20-4026067Stoneham, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Hospital
04-2104434Winchester, MA·1 plan·2023, 2022, 2021, 2020Winchester Hospital
04-2932059Winchester, MA·1 plan·2023, 2022, 2021, 2020Winchester Hospital
04-3447765Winchester, MA·1 plan·2023, 2022, 2021, 2020Winchester Mechanical Service Co
04-3512491Billerica, MA·1 plan·2023, 2022Winchester Ob/Gyn Associates, P.C.
04-3052252Winchester, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Oral Surgery, PC
20-0690203Winchester, MA·2 plans·2024, 2023, 2022, 2021, 2020Winchester Orthodontics, P.C.
16-1762724Winchester, MA·1 plan·2024, 2023, 2022, 2021, 2020Winchester Savings Bank
04-1978230Winchester, MA·2 plans·2024, 2023, 2022, 2021, 2020Winchester Women'S Healthcare, P.C.
04-3262176Andover, MA·1 plan·2022, 2021, 2020Wind River Environmental
04-3487677Marlborough, MA·4 plans·2024, 2023, 2022, 2021, 2020Windemere Alternative Living L
88-2613748Essex, MA·1 plan·2024Windesco, INC.
46-5317959Burlington, MA·1 plan·2024, 2023, 2022, 2021, 2020Windfall Associates INC.
04-3474966Newton Upper Falls, MA·1 plan·2024, 2023, 2022, 2021, 2020Windgap Medical
45-3914066Watertown, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Windham Capital Management LLC
04-3204704Cambridge, MA·1 plan·2024, 2023, 2022, 2021, 2020Windhill Builders
46-3889268Ipswich, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Windmill Country Day School In
04-2788424Amesbury, MA·1 plan·2024, 2023, 2022, 2021, 2020Windover Construction INC.
20-8135911Beverly, MA·2 plans·2024, 2023, 2022, 2021, 2020Windover Development LLC
54-2137878Beverly, MA·1 plan·2020Window Woman Of New England, INC.
26-4369990Amesbury, MA·1 plan·2024, 2023, 2022, 2021, 2020Window World Of Western Massachusetts, INC.
27-1993659Belchertown, MA·1 plan·2022, 2021, 2020Windrose Advisors, LLC
27-0558294Waltham, MA·1 plan·2024, 2023, 2022, 2021, 2020Windsor Construction Management Services LLC
06-1442062Springfield, MA·1 plan·2024, 2023, 2022, 2021, 2020Windsor Place Condominium Trust
04-2952232Chelsea, MA·1 plan·2024, 2023Windsor Wealth Management, LLC
87-3044391Topsfield, MA·1 plan·2024, 2023Windwalker Group LLC - K7456
27-1370391Boston, MA·2 plans·2024, 2023, 2022, 2021, 2020Windward Consulting LLC
84-2402366Monument Beach, MA·1 plan·2021, 2020Windward Shaw Construction LLC
82-2955309Newburyport, MA·1 plan·2024, 2023, 2022, 2021, 2020Windy Media LLC
46-2380848East Boston, MA·1 plan·2024, 2023, 2022, 2021, 2020Wineland-Thomson Adventures, INC.
04-2730958Watertown, MA·1 plan·2024, 2023, 2022, 2021, 2020Winfield Corp.
04-3270023West Newbury, MA·1 plan·2024, 2023, 2022, 2021, 2020Wing Press Incorporated
04-3447955Framingham, MA·1 plan·2024, 2023, 2022, 2021, 2020Wingate Furniture Co Ltd
04-3496631Great Barrington, MA·1 plan·2024, 2023, 2022, 2021, 2020Wingate Healthcare, INC.
04-3520944Needham, MA·1 plan·2022, 2021, 2020Wingate Healthcare, INC.
13-2704000Needham, MA·1 plan·2022, 2021, 2020Wingate Kirkland Operating LLC
52-2443840Yarmouth Port, MA·1 plan·2024, 2023, 2022, 2021Wingate Management Company, LLC
20-2388094Newton, MA·2 plans·2024, 2023, 2022, 2021, 2020Wingate Senior Living, LLC
84-3237905Newton, MA·2 plans·2024, 2023Wingate Wealth Advisors, LLC
45-4046406Lexington, MA·1 plan·2024, 2023, 2022, 2021, 2020Wings Of Fire Automotive, INC
47-4530225North Attleboro, MA·1 plan·2020Winikur Productions LLC
30-0027306Boston, MA·1 plan·2024, 2023, 2022, 2021Winn Management Group LLC
04-2582550Boston, MA·2 plans·2024, 2023, 2022, 2021, 2020Winnie Yu, D.M.D., P.C.
20-5958093Groton, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Winning Moves, INC.
04-3253393Middleton, MA·1 plan·2024, 2023, 2022, 2021, 2020Winning Solutions, INC.
04-3509606Manchester, MA·2 plans·2024, 2023, 2022, 2021, 2020Winq Lashes LLC
82-1429856Boston, MA·1 plan·2021, 2020Winslow Technology Group, LLC
30-0213189Waltham, MA·1 plan·2024, 2023, 2022, 2021, 2020Winslow, Evans & Crocker, INC.
04-3144652Boston, MA·1 plan·2020Winslow, King, Richards & Company, INC.
02-0401355Norwood, MA·2 plans·2024, 2023, 2020Winsor Development
04-3175768Natick, MA·1 plan·2022, 2021, 2020Winspring INC
82-0678110Andover, MA·1 plan·2024, 2023, 2022, 2021, 2020Winstanley Enterprises LLC
04-3381761Concord, MA·1 plan·2024, 2025, 2023, 2022, 2021, 2020Winston Brothers, INC.
04-3039602Boston, MA·2 plans·2024, 2023, 2022, 2021, 2020Winston Builders Corporation
04-2479486Westborough, MA·1 plan·2024, 2023, 2022, 2021, 2020Winston Partners INC
85-1717331West Yarmouth, MA·1 plan·2022, 2021, 2020