Massachusetts Employer EIN Lookup

Use this Massachusetts EIN lookup to find an employer’s Employer Identification Number from its public Form 5500 filing. 30,959 employers based in Massachusetts have filed a Form 5500, covering 35,042 retirement and health plans with $478.9B in reported assets. The largest are listed below with their EIN — open any employer to see the full filing.

Employers

30,959

Plans

35,042

Total assets

$478.9B

Largest employers in Massachusetts by EIN

Form 5500 search →


FMR LLC	Boston	14	505,505	$35.3B
MASS General Brigham Incorporated	Somerville	7	225,234	$26.2B
Liberty Mutual Group Inc.	Boston	18	127,001	$17.6B
Massachusetts Institute of Technology	Cambridge	7	73,718	$14.8B
President & Fellows of Harvard College Harvard Human Resources, Benefi	Cambridge	11	150,482	$10.3B
New England Teamsters Pension Fund	Burlington	1	21,577	$9.1B
State Street Corporation	Boston	4	38,896	$7.4B
Massachusetts Mutual Life Insurance Company	Springfield	15	47,944	$7.0B
Philips North America LLC	Cambridge	7	51,821	$6.8B
Boston Scientific Corporation	Marlborough	5	69,109	$6.8B
Takeda Pharmaceutical U.S.A., Inc.	Cambridge	4	63,973	$6.2B
The TJX Companies, Inc.	Framingham	6	608,984	$5.3B
BETH Israel Lahey Health	Boston	2	55,299	$5.1B
BOT of the North Atlantic States Carpenters Pension Fund	Wilmington	2	16,442	$5.1B
Trustees of Boston University	Boston	13	91,353	$4.7B
National Medical Care, Inc.	Waltham	8	300,930	$4.7B
Analog Devices, Inc.	Wilmington	2	13,495	$4.3B
The Boston Consulting Group, Inc.	Boston	5	25,458	$4.1B
BOT of the North Atlantic States Carpenters Guaranteed Annuity Fund	Wilmington	1	10,412	$3.8B
Wellington Management Company LLP	Boston	3	4,299	$3.3B
Umass Memorial Health Care, Inc.	Worcester	4	44,156	$3.3B
The Children's Hospital Corporation	Boston	6	45,202	$2.9B
Northeastern University	Boston	2	15,545	$2.6B
John Hancock Life Insurance Company U.S.a	Boston	6	9,793	$2.5B
Board of Trustees of Massachusetts Laborers' Pension Fund	Burlington	1	10,031	$2.5B
BAIN and Company, Inc.	Boston	2	11,902	$2.4B
BD. of Trustees of MASS. Laborers Annuity Fund	Burlington	1	13,601	$2.3B
The Manufacturers Investment Corporation	Boston	4	9,893	$2.2B
Harvard Med. Faculty Physicians at BETH Israel Deaconess Med. CTR. Inc.	Boston	3	7,173	$2.2B
Biogen Inc.	Cambridge	3	12,715	$2.2B
Dassault Systemes Americas Corp.	Waltham	2	12,118	$2.1B
Blue Cross Blue Shield of Massachusetts, Inc.	Boston	5	16,054	$2.1B
Trustees of Tufts College	Medford	5	17,262	$2.1B
Sun Life Financial U.S. Services Company, Inc.	Wellesley Hills	5	17,563	$2.0B
Joint Board of Trustees Electrical Workers Local 103 IBEW	Boston	1	6,140	$1.9B
The Charles Stark Draper Laboratory, Inc.	Cambridge	5	6,480	$1.9B
Boston Medical Center	Boston	3	29,739	$1.9B
Ropes & Gray LLP	Boston	5	6,955	$1.9B
Dana-Farber Cancer Institute, Inc.	Boston	5	22,646	$1.8B
The Mathworks, Inc.	Natick	2	10,372	$1.8B
Builders Firstsource, Inc.	Andover	1	31,456	$1.7B
Cushman & Wakefield	Needham	1	23,448	$1.7B
The Hanover Insurance Company	Worcester	5	15,383	$1.6B
Joint Board of Trustees, Electrical	Boston	1	8,421	$1.6B
BOSE Corporation	Framingham	5	5,808	$1.5B
Goodwin Procter LLP	Boston	5	6,073	$1.5B
Staples, Inc.	Framingham	3	35,008	$1.5B
CDM Smith Inc.	Boston	2	7,973	$1.5B
Massachusetts Financial Services Company	Boston	3	5,098	$1.5B
Ahold USA, Inc.	Quincy	3	78,071	$1.5B
Wilmer Cutler Pickering HALE and DORR LLP	Boston	3	3,893	$1.4B
Akamai Technologies, Inc.	Cambridge	2	7,624	$1.4B
Baystate Health, Inc.	Springfield	4	32,976	$1.4B
Trustees of Boston College	Chestnut Hill	5	9,435	$1.4B
Point32health	Watertown	4	16,906	$1.3B
Board of Trustees I.U.O.E. Local 4 Pension Fund	Medway	1	3,513	$1.3B
Vertex Pharmaceuticals Incorporated	Boston	2	10,041	$1.3B
Waters Technologies Corporation	Milford	5	9,374	$1.3B
Clean Harbors Enviromental Services, Inc.	Norwell	2	38,725	$1.2B
Teradyne, Inc. & Subsidiaries	North Reading	3	4,778	$1.2B
BETH Israel Lahey Health, Inc.	Charlestown	3	45,089	$1.2B
Tufts Medicine, Inc.	Burlington	3	21,650	$1.2B
Hologic, Inc.	Marlborough	2	8,298	$1.2B
Veralto Corporation	Waltham	2	10,882	$1.2B
Southcoast Hospitals Group, Inc.	New Bedford	2	17,091	$1.1B
Demoulas Super Markets, Inc.	Tewksbury	4	30,209	$1.1B
Charles River Laboratories, Inc.	Wilmington	2	18,557	$1.1B
Veolia North America, LLC	Boston	4	13,911	$1.1B
Pipe & Refrigeration Fitters Local 537	Dorchester	1	2,372	$962.4M
Cooperative Banks Employees Retirement Association	Norwood	2	3,206	$943.6M
BOT North Atlantic States Carpenters Health Benefits Fund	Wilmington	1	18,857	$939.0M
The STOP & Shop Supermarket Company LLC	Quincy	1	3,695	$931.9M
Sappi North America, Inc.	Boston	7	5,534	$930.4M
Cape COD Healthcare, Inc.	Hyannis	1	4,934	$929.2M
Brandeis University	Waltham	3	4,266	$907.2M
Parexel International Corporation	Newton	2	10,770	$899.9M
Entegris, Inc.	Billerica	2	9,063	$880.8M
Cabot Corporation	Billerica	4	2,791	$875.6M
PTC Inc.	Boston	2	4,587	$856.0M
Wellesley College	Wellesley	4	2,752	$854.3M
Skyworks Solutions, Inc.	Woburn	1	2,480	$852.5M
MKS Instruments, Inc.	Andover	2	5,718	$839.6M
Eastern Bank	Boston	5	5,526	$833.9M
Athenahealth, Inc.	Boston	3	9,900	$826.6M
Wayfair LLC	Boston	2	18,401	$786.1M
Pipefitters Local Union No.537	Dorchester	1	3,374	$784.5M
Tufts Medical Center Physicians Organization, Inc.	Boston	3	2,158	$783.5M
ZOLL Medical Corporation	Chelmsford	2	10,679	$782.0M
Acushnet Company	Fairhaven	3	7,817	$781.9M
Loomis, Sayles & Company, L.P.	Boston	3	1,586	$773.2M
BD of Trustees PDC Pension Fund	Roslindale	1	2,342	$761.1M
Houghton Mifflin Harcourt Publishing Company	Boston	4	8,459	$756.3M
Consigli Building Group, Inc.	Milford	1	1,634	$729.3M
South Shore Hospital, Inc.	Norwell	3	11,089	$727.3M
Board of Trustees I.U.O.E. Local 4 Annuity Fund	Medway	1	6,058	$724.6M
Williams College	Williamstown	2	2,707	$701.3M
BHS Management Services Inc.	Pittsfield	2	7,908	$693.6M
Worcester Polytechnic Institute	Worcester	2	3,281	$687.1M
Mintz Levin COHN Ferris Glovsky and Popeo PC	Boston	3	2,397	$686.7M
Board of Trustees Iron Workers	Dorchester	1	2,142	$683.1M

How to find an employer’s EIN in Massachusetts

Every employer that sponsors a retirement or health plan files a Form 5500 that lists its nine-digit Employer Identification Number. Find a Massachusetts company in the table above, or run a Form 5500 search by company name to pull the filing and read the EIN directly from it.

For a broader view of plans in the state — including industry breakdowns and the largest plans by assets — see Form 5500 plans in Massachusetts. New to these filings? Start with What is Form 5500?

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