Massachusetts 401(k) plans

Name: Massachusetts 401(k) plans: assets, participants and plan-paid fees
Creator: 401(k) Monitor
License: https://401kmonitor.com/licence/

1,958

Large 401(k) plans headquartered in Massachusetts are in 401(k) Monitor’s published set, holding $258.5B in total, led on headcount by The TJX Companies, Inc. 401(k) Savings Plan with 294,348 active participants. Computed from DOL Form 5500 filings, plan years 2018–2025.

State means the sponsor’s address on the filing, not where employees work. Our published set covers 57,824 of the 57,824 large plans in the form-year-2024 DOL EFAST2 bulk data, so this is the largest-plan end of Massachusetts, not a census of it.

57 of the biggest 401(k) plans headquartered in Massachusetts

The plans this site submits to search engines come first, then the rest; each group is ranked by active participants, the people still building up a balance. plan years 2018–2025, DOL EFAST2 bulk data. Assets in USD. Every plan links to its full fact page.
#	Plan	City	Active participants	Assets
1	The TJX Companies, Inc. 401(k) Savings Plan	Framingham	294,348	$3.7B
2	Ahold USA, Inc. 401(k) Savings Plan For Union Associates	Quincy	76,517	$910.2M
3	Fidelity Retirement Savings Plan	Boston	68,838	$34.2B
4	Fresenius Medical Care North America 401(k) Savings Plan	Waltham	61,883	$4.4B
5	BJ's Wholesale Club, Inc. 401(k) Savings Plan	Marlborough	34,191	$661.1M
6	Liberty Mutual 401(k) Plan	Boston	31,562	$11.4B
7	Builders Firstsource 401(k) Savings Plan	Andover	31,456	$1.7B
8	Cushman & Wakefield 401(k) Plan	Needham	23,448	$1.7B
9	Takeda Pharmaceutical U.S.A., Inc. Savings And Retirement Plan	Cambridge	23,331	$6.2B
10	Boston Scientific Corporation 401(k) Retirement Savings Plan	Marlborough	21,923	$6.8B
11	Pyramid Advisors 401(k) Plan	Boston	21,328	$246.8M
12	Bright Horizons 401(k) Plan	Newton	18,958	$465.7M
13	Clean Harbors Savings And Retirement Plan	Norwell	18,877	$1.2B
14	Philips North America 401(k) Plan	Cambridge	17,066	$6.4B
15	Eg America Employee Savings Plan	Westborough	16,690	$337.9M
16	Beth Israel Lahey Health 401(k) Retirement Savings Plan	Boston	15,698	$1.6B
17	Vetcor 401(k) Plan	Norwell	15,659	$288.3M
18	Massachusetts Institute Of Technology Supplemental 401(k) Plan	Cambridge	15,125	$7.7B
19	The Stepping Stones Group Retirement Plan	Boston	14,977	$104.0M
20	Umass Memorial Health Care 401(k) Plan	Worcester	14,248	$1.4B
21	Baystate Health, Inc. Retirement Plan	Springfield	13,905	$1.4B
22	Fidelity Advantage 401(k)	Boston	13,825	$184.6M
23	Massmutual Thrift Plan	Springfield	13,678	$4.3B
24	Unifirst Retirement Savings Plan	Wilmington	12,174	$554.2M
25	State Street Salary Savings Program	Boston	11,992	$6.5B
26	Wayfair LLC 401(k) Plan & Trust	Boston	11,897	$786.1M
27	House Works LLC 401(k) Plan	Woburn	11,844	$7.2M
28	Staples, Inc. Employees' 401(k) Savings Plan	Framingham	11,200	$1.5B
29	Tufts Medicine, Inc. 403(b) Retirement Plan	Burlington	11,129	$991.9M
30	Staples US Retail 401(k) Retirement Plan	Framingham	10,925	$404.6M
31	Big Y Foods, Inc. 401(k) Retirement Savings Plan	Springfield	10,329	$573.8M
32	The Boston Consulting Group, Inc. Employees' Savings Plan And Profit Sharing Retirement Fund	Boston	9,676	$2.9B
33	Charles River Laboratories, Inc. Savings/Plus Plan	Wilmington	9,584	$1.1B
34	The Alerislife Retirement Plan	Newton	8,551	$128.3M
35	Veolia North America 401(k) Savings Plan	Boston	7,090	$1.0B
36	Benchmark Senior Living 401(k) Plan	Waltham	6,949	$95.0M
37	Analog Devices, Inc. The Investment Partnership Plan	Wilmington	6,764	$4.3B
38	Sonesta International Hotels Corporation And Subsidiaries 401(k) Plan	Newton	6,570	$157.1M
39	Dassault Systemes Employee Savings Plan Plus	Waltham	6,193	$2.1B
40	International Union Of Operating Engineers Local 4 Annuity	Medway	6,058	$724.6M
41	Bain And Company, Inc. 401(k) Savings Plan	Boston	6,046	$2.4B
42	Sun Advantage Savings And Investment Plan	Wellesley Hills	5,991	$1.8B
43	Veralto Corporation & Subsidiaries Savings Plan	Waltham	5,508	$1.2B
44	Zoll Medical Corporation Employee Savings Plan	Chelmsford	5,380	$782.0M
45	Consolidated 401(A) And 401(k) Program Of Mass General Brigham And Member Organizations	Somerville	5,255	$645.2M
46	Keolis America, Inc. 401(k) Savings Plan	Boston	5,252	$280.9M
47	Global Partners Lp 401(k) Savings And Profit Sharing Plan	Waltham	5,111	$232.7M
48	Vertex Pharmaceuticals Incorporated 401(k) Plan	Boston	5,091	$1.3B
49	Parexel International Corporation 401(k) Retirement Savings Plan	Newton	5,084	$899.9M
50	Accession Risk Management Group 401(k) Plan	Boston	4,990	$441.8M
51	The Hanover Insurance Group Retirement Savings Plan	Worcester	4,930	$1.3B
52	The Investment-Incentive Plan For John Hancock Employees	Boston	4,860	$2.4B
53	The Talbots Retirement Savings 401(k) Plan	Hingham	4,829	$236.6M
54	Modernatx, Inc. 401(k) Plan	Cambridge	4,822	$501.7M
55	Toast, Inc. 401(k) Plan	Boston	4,799	$323.2M
56	Hubspot, Inc. 401(k) Profit Sharing Plan & Trust	Cambridge	4,766	$568.3M
57	New Balance Athletics Employee Savings And Security Plan	Boston	4,704	$492.8M

Every Massachusetts plan, by size

The table above is the top of the list. These 11 pages hold all 1,958 plans on file from Massachusetts, split by how many people are in them, each ranked by active participants.

100 to 499 participants · 1,320 plans
Pages1 2 3 4 5 6
500 to 999 participants · 287 plans
Pages1 2
1,000 to 4,999 participants · 274 plans
Pages1 2
5,000 or more participants · 77 plans

401(k) fees in Massachusetts vs the national median

Plan-paid administrative cost per participant, plan years 2018–2025 Form 5500 filings. Medians over our published set, not the full universe.
Massachusetts medianAcross the 1,814 Massachusetts plans in our set with usable fee data.	$112.91 per participant
National medianAcross 54,783 published plans with usable fee data.	$122.17 per participant
Difference	$9.27 below the national median

Plan-paid means fees the plan itself reports on Schedule H; many employers pay providers directly, which a filing reports as $0. How to judge your own plan: are your 401(k) fees high?

Massachusetts employers with a match dossier

These Massachusetts-headquartered plans also file an SEC Form 11-K, so the employer’s match formula, vesting and eligibility are extracted on a company page.

Boston Scientific Corporation 401(k) match
Boston Scientific Corporation 401(k) Retirement Savings Plan
State Street Corporation 401(k) match
State Street Salary Savings Program

Useful links

All states
Plan counts, fees and largest plans, state by state.
The largest 401(k) plans in the US
The national ranking these state tables are drawn from.
Average 401(k) fees by plan size
Fees depend on plan size more than on state.

Cite: 401(k) Monitor, “Massachusetts 401(k) plans: largest plans and fees”, computed from DOL EFAST2 Form 5500 bulk data, plan years 2018–2025, published set of 57,824 plans, data as of July 28, 2026.