Massachusetts Employer EIN Lookup
Use this MassachusettsEIN lookup to find an employer’s Employer Identification Number from its public Form 5500 filing. 30,410 employers based in Massachusetts have filed a Form 5500, covering 34,478 retirement and health plans with $478.6B in reported assets. The largest are listed below with their EIN — open any employer to see the full filing.
Employers
30,410
Plans
34,478
Total assets
$478.6B
Largest employers in Massachusetts by EIN
Form 5500 search →| Employer | EIN | City | Plans | Participants | Assets |
|---|---|---|---|---|---|
| FMR LLC | 04-3532603 | BOSTON | 14 | 505,505 | $35.3B |
| MASS GENERAL BRIGHAM INCORPORATED | 04-3230035 | SOMERVILLE | 7 | 225,234 | $26.2B |
| LIBERTY MUTUAL GROUP INC. | 04-3583679 | BOSTON | 18 | 127,001 | $17.6B |
| MASSACHUSETTS INSTITUTE OF TECHNOLOGY | 04-2103594 | CAMBRIDGE | 7 | 73,718 | $14.8B |
| PRESIDENT & FELLOWS OF HARVARD COLLEGE HARVARD HUMAN RESOURCES, BENEFI | 04-2103580 | CAMBRIDGE | 11 | 150,482 | $10.3B |
| NEW ENGLAND TEAMSTERS PENSION FUND | 04-6372430 | BURLINGTON | 1 | 21,577 | $9.1B |
| STATE STREET CORPORATION | 04-2456637 | BOSTON | 4 | 38,896 | $7.4B |
| MASSACHUSETTS MUTUAL LIFE INSURANCE COMPANY | 04-1590850 | SPRINGFIELD | 15 | 47,944 | $7.0B |
| PHILIPS NORTH AMERICA LLC | 13-3429115 | CAMBRIDGE | 7 | 51,821 | $6.8B |
| BOSTON SCIENTIFIC CORPORATION | 04-2695240 | MARLBOROUGH | 5 | 69,109 | $6.8B |
| TAKEDA PHARMACEUTICAL U.S.A., INC. | 13-4013710 | CAMBRIDGE | 4 | 63,973 | $6.2B |
| THE TJX COMPANIES, INC. | 04-2207613 | FRAMINGHAM | 6 | 608,984 | $5.3B |
| BETH ISRAEL LAHEY HEALTH | 04-2103881 | BOSTON | 2 | 55,299 | $5.1B |
| BOT OF THE NORTH ATLANTIC STATES CARPENTERS PENSION FUND | 51-6040899 | WILMINGTON | 2 | 16,442 | $5.1B |
| TRUSTEES OF BOSTON UNIVERSITY | 04-2103547 | BOSTON | 13 | 91,621 | $4.7B |
| NATIONAL MEDICAL CARE, INC. | 04-2835488 | WALTHAM | 8 | 300,930 | $4.7B |
| ANALOG DEVICES, INC. | 04-2348234 | WILMINGTON | 2 | 13,495 | $4.3B |
| THE BOSTON CONSULTING GROUP, INC. | 04-2432614 | BOSTON | 5 | 25,458 | $4.1B |
| BOT OF THE NORTH ATLANTIC STATES CARPENTERS GUARANTEED ANNUITY FUND | 04-2776873 | WILMINGTON | 1 | 10,412 | $3.8B |
| WELLINGTON MANAGEMENT COMPANY LLP | 30-0835489 | BOSTON | 3 | 4,299 | $3.3B |
| UMASS MEMORIAL HEALTH CARE, INC. | 04-3358566 | WORCESTER | 4 | 44,156 | $3.3B |
| THE CHILDREN'S HOSPITAL CORPORATION | 04-2774441 | BOSTON | 6 | 45,202 | $2.9B |
| NORTHEASTERN UNIVERSITY | 04-1679980 | BOSTON | 2 | 15,545 | $2.6B |
| JOHN HANCOCK LIFE INSURANCE COMPANY U.S.A | 01-0233346 | BOSTON | 6 | 9,793 | $2.5B |
| BOARD OF TRUSTEES OF MASSACHUSETTS LABORERS' PENSION FUND | 04-6128298 | BURLINGTON | 1 | 10,031 | $2.5B |
| BAIN AND COMPANY, INC. | 04-2878322 | BOSTON | 2 | 11,902 | $2.4B |
| BD. OF TRUSTEES OF MASS. LABORERS ANNUITY FUND | 04-6553616 | BURLINGTON | 1 | 13,601 | $2.3B |
| THE MANUFACTURERS INVESTMENT CORPORATION | 38-3261832 | BOSTON | 4 | 9,893 | $2.2B |
| HARVARD MED. FACULTY PHYSICIANS AT BETH ISRAEL DEACONESS MED. CTR. INC | 22-2768204 | BOSTON | 3 | 7,173 | $2.2B |
| BIOGEN INC. | 33-0112644 | CAMBRIDGE | 3 | 12,715 | $2.2B |
| DASSAULT SYSTEMES AMERICAS CORP. | 51-0379588 | WALTHAM | 2 | 12,118 | $2.1B |
| BLUE CROSS BLUE SHIELD OF MASSACHUSETTS, INC. | 04-1045815 | BOSTON | 5 | 16,054 | $2.1B |
| TRUSTEES OF TUFTS COLLEGE | 04-2103634 | MEDFORD | 5 | 17,262 | $2.1B |
| SUN LIFE FINANCIAL U.S. SERVICES COMPANY, INC. | 26-3730703 | WELLESLEY HILLS | 5 | 17,563 | $2.0B |
| JOINT BOARD OF TRUSTEES ELECTRICAL WORKERS LOCAL 103 IBEW | 04-6063734 | BOSTON | 1 | 6,140 | $1.9B |
| THE CHARLES STARK DRAPER LABORATORY, INC. | 04-2505372 | CAMBRIDGE | 5 | 6,480 | $1.9B |
| BOSTON MEDICAL CENTER | 04-3314093 | BOSTON | 3 | 29,739 | $1.9B |
| ROPES & GRAY LLP | 04-2233412 | BOSTON | 5 | 6,955 | $1.9B |
| DANA-FARBER CANCER INSTITUTE, INC. | 04-2263040 | BOSTON | 5 | 22,646 | $1.8B |
| THE MATHWORKS, INC. | 94-2960235 | NATICK | 2 | 10,372 | $1.8B |
| BUILDERS FIRSTSOURCE, INC. | 52-2084569 | ANDOVER | 1 | 31,456 | $1.7B |
| CUSHMAN & WAKEFIELD | 43-0955234 | NEEDHAM | 1 | 23,448 | $1.7B |
| THE HANOVER INSURANCE COMPANY | 13-5129825 | WORCESTER | 5 | 15,383 | $1.6B |
| JOINT BOARD OF TRUSTEES, ELECTRICAL | 04-2471895 | BOSTON | 1 | 8,421 | $1.6B |
| BOSE CORPORATION | 04-2655386 | FRAMINGHAM | 5 | 5,808 | $1.5B |
| GOODWIN PROCTER LLP | 04-1378465 | BOSTON | 5 | 6,073 | $1.5B |
| STAPLES, INC. | 04-2896127 | FRAMINGHAM | 3 | 35,008 | $1.5B |
| CDM SMITH INC. | 04-2473650 | BOSTON | 2 | 7,973 | $1.5B |
| MASSACHUSETTS FINANCIAL SERVICES COMPANY | 04-2747644 | BOSTON | 3 | 5,098 | $1.5B |
| AHOLD USA, INC. | 53-0073545 | QUINCY | 3 | 78,071 | $1.5B |
| WILMER CUTLER PICKERING HALE AND DORR LLP | 04-1409810 | BOSTON | 3 | 3,893 | $1.4B |
| AKAMAI TECHNOLOGIES, INC. | 04-3432319 | CAMBRIDGE | 2 | 7,745 | $1.4B |
| BAYSTATE HEALTH, INC | 04-2105941 | SPRINGFIELD | 4 | 33,718 | $1.4B |
| TRUSTEES OF BOSTON COLLEGE | 04-2103545 | CHESTNUT HILL | 5 | 9,435 | $1.4B |
| POINT32HEALTH | 04-2985923 | WATERTOWN | 4 | 16,906 | $1.3B |
| BOARD OF TRUSTEES I.U.O.E. LOCAL 4 PENSION FUND | 04-6013863 | MEDWAY | 1 | 3,513 | $1.3B |
| VERTEX PHARMACEUTICALS INCORPORATED | 04-3039129 | BOSTON | 2 | 10,041 | $1.3B |
| WATERS TECHNOLOGIES CORPORATION | 04-3234558 | MILFORD | 5 | 9,374 | $1.3B |
| CLEAN HARBORS ENVIROMENTAL SERVICES, INC. | 04-2698999 | NORWELL | 2 | 38,725 | $1.2B |
| TERADYNE, INC. & SUBSIDIARIES | 04-2272148 | NORTH READING | 3 | 4,778 | $1.2B |
| BETH ISRAEL LAHEY HEALTH, INC. | 83-2671600 | CHARLESTOWN | 3 | 45,089 | $1.2B |
| TUFTS MEDICINE, INC. | 47-2250732 | BURLINGTON | 3 | 21,650 | $1.2B |
| HOLOGIC, INC. | 04-2902449 | MARLBOROUGH | 2 | 8,298 | $1.2B |
| VERALTO CORPORATION | 92-1941413 | WALTHAM | 2 | 10,882 | $1.2B |
| SOUTHCOAST HOSPITALS GROUP, INC. | 22-2592333 | NEW BEDFORD | 2 | 17,091 | $1.1B |
| DEMOULAS SUPER MARKETS, INC. | 04-2323411 | TEWKSBURY | 4 | 30,209 | $1.1B |
| CHARLES RIVER LABORATORIES, INC. | 76-0509980 | WILMINGTON | 2 | 19,034 | $1.1B |
| VEOLIA NORTH AMERICA, LLC | 26-2756568 | BOSTON | 4 | 13,911 | $1.1B |
| PIPE & REFRIGERATION FITTERS LOCAL 537 | 51-6030859 | DORCHESTER | 1 | 2,372 | $962.4M |
| COOPERATIVE BANKS EMPLOYEES RETIREMENT ASSOCIATION | 04-6035593 | NORWOOD | 2 | 3,206 | $943.6M |
| BOT NORTH ATLANTIC STATES CARPENTERS HEALTH BENEFITS FUND | 04-6374357 | WILMINGTON | 1 | 18,857 | $939.0M |
| THE STOP & SHOP SUPERMARKET COMPANY LLC | 04-3061447 | QUINCY | 1 | 3,695 | $931.9M |
| SAPPI NORTH AMERICA, INC. | 23-2366983 | BOSTON | 7 | 5,534 | $930.4M |
| CAPE COD HEALTHCARE, INC. | 22-2600704 | HYANNIS | 1 | 4,934 | $929.2M |
| BRANDEIS UNIVERSITY | 04-2103552 | WALTHAM | 3 | 4,266 | $907.2M |
| PAREXEL INTERNATIONAL CORPORATION | 04-2776269 | NEWTON | 2 | 10,770 | $899.9M |
| ENTEGRIS, INC. | 41-1941551 | BILLERICA | 2 | 9,063 | $880.8M |
| CABOT CORPORATION | 04-2271897 | BILLERICA | 4 | 2,791 | $875.6M |
| PTC INC. | 04-2866152 | BOSTON | 2 | 4,587 | $856.0M |
| WELLESLEY COLLEGE | 04-2103637 | WELLESLEY | 4 | 2,752 | $854.3M |
| EASTERN BANK | 04-3067724 | BOSTON | 5 | 5,887 | $853.4M |
| SKYWORKS SOLUTIONS, INC. | 04-2302115 | WOBURN | 1 | 2,480 | $852.5M |
| MKS INSTRUMENTS, INC. | 04-2277512 | ANDOVER | 2 | 5,718 | $839.6M |
| ATHENAHEALTH, INC. | 04-3387530 | BOSTON | 3 | 9,900 | $826.6M |
| WAYFAIR LLC | 26-2188108 | BOSTON | 2 | 18,401 | $786.1M |
| PIPEFITTERS LOCAL UNION NO.537 | 04-2760802 | DORCHESTER | 1 | 3,374 | $784.5M |
| TUFTS MEDICAL CENTER PHYSICIANS ORGANIZATION, INC. | 04-3044706 | BOSTON | 3 | 2,158 | $783.5M |
| ZOLL MEDICAL CORPORATION | 04-2711626 | CHELMSFORD | 2 | 10,679 | $782.0M |
| ACUSHNET COMPANY | 04-2591836 | FAIRHAVEN | 3 | 7,817 | $781.9M |
| LOOMIS, SAYLES & COMPANY, L.P. | 04-3200030 | BOSTON | 3 | 1,586 | $773.2M |
| BD OF TRUSTEES PDC PENSION FUND | 04-6043807 | ROSLINDALE | 1 | 2,342 | $761.1M |
| HOUGHTON MIFFLIN HARCOURT PUBLISHING COMPANY | 04-1456030 | BOSTON | 4 | 8,459 | $756.3M |
| CONSIGLI BUILDING GROUP, INC. | 27-0396940 | MILFORD | 1 | 1,634 | $729.3M |
| SOUTH SHORE HOSPITAL, INC. | 04-2769210 | NORWELL | 3 | 11,089 | $727.3M |
| BOARD OF TRUSTEES I.U.O.E. LOCAL 4 ANNUITY FUND | 04-3002474 | MEDWAY | 1 | 6,058 | $724.6M |
| WILLIAMS COLLEGE | 04-2104847 | WILLIAMSTOWN | 2 | 2,707 | $701.3M |
| BHS MANAGEMENT SERVICES INC. | 04-2442944 | PITTSFIELD | 2 | 7,908 | $693.6M |
| WORCESTER POLYTECHNIC INSTITUTE | 04-2121659 | WORCESTER | 2 | 3,281 | $687.1M |
| MINTZ LEVIN COHN FERRIS GLOVSKY AND POPEO PC | 04-2718459 | BOSTON | 3 | 2,397 | $686.7M |
| BOARD OF TRUSTEES IRON WORKERS | 04-2591016 | DORCHESTER | 1 | 2,142 | $683.1M |
EINs are drawn from the Form 5500 the employer filed with the U.S. Department of Labor. An employer’s EIN is the same across all of its plans — open a filing to confirm the sponsor name and address before relying on it.
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?