THORNTON TOMASETTI, INC. is a Wisconsin corporation, registered on August 23, 1999. The company is currently listed as active on the Wisconsin register, is registered under company number L032201 and carries EIN 131251070. Its E-Verify enrollment reports a workforce of 500 to 999 employees, hiring at 15 sites across 12 states. Public records for the company include 1 SoS registration, 4 permits, 10 licenses, 11 federal contracts, 368 H-1B filings, 1 E-Verify record and 16 Form 5500 filings. Every fact here is republished from an official public register and traces back to a primary source document.
| Legal entity name | THORNTON TOMASETTI, INC. |
|---|---|
| Registration state | Wisconsin |
| Status | Active |
| Registered | 23 August 1999 (about 27 years ago) |
| Entity type | Corporation |
| Standing | compliant |
| Company number | L032201 |
| EIN | 131251070 |
| LEI | 549300ZN4Y2YGQIW7922 |
| Employees (modeled) | ≈1,420 employees2025 |
| Workforce size | 500 to 999 employees · updated 23 October 2014 |
| Hiring sites | 15 sites across 12 states |
| H-1B filings | 368 LCA filings, FY 2015–2025 |
| Registered agent | CORPORATION SERVICE COMPANY |
|---|
| Source registry | Wisconsin Department of Financial Institutions · updated 15 June 2026 |
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| Public records | 1 SoS registration |
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| Est. revenue (modeled) | $372.9M2025 |
|---|---|
| Federal contractor | Yes · 11 federal recipient records (SAM) |
| State | Business name | Filed | Registered agent | Officers | Status | |
|---|---|---|---|---|---|---|
| WisconsinTHIS | THORNTON TOMASETTI, INC. | 1999-08-23 | CORPORATION SERVICE COMPANY | — | Active | |
Filing ID L032201 Jurisdiction Domestic · Corporation Principal address — Registered agent CORPORATION SERVICE COMPANY33 EAST MAIN STREET, SUITE 610, MADISON, WI, 53703 Officers Not reported | ||||||
| Alaska | Thornton Tomasetti, Inc. | 2005-05-16 | Corporation Service Company | Bruce M. GibbonsDirector, ShareholderAndrew GoldbaumTreasurer, Shareholder10 more | Active | |
| Arkansas | THORNTON TOMASETTI, INC. | 2004-09-22 | CORPORATION SERVICE COMPANY | KARINA NA WILLIAMSOfficerSCOTT NA LOMAXOfficer1 more | Active | |
| Arizona | THORNTON TOMASETTI, INC. | 2009-03-02 | Corporation Service Company | Michael SquarziniOfficer, DirectorPagona PhillipsDirector10 more | Active | |
| Colorado | Thornton Tomasetti, Inc. | 2006-12-18 | CORPORATION SERVICE COMPANY | — | Active | |
| Connecticut | THORNTON TOMASETTI, INC. | 1992-06-23 | CORPORATION SERVICE COMPANY | PETER DIMAGGIODirectorTHOMAS Z. SCARANGELLODirector13 more | Active | |
| District of Columbia | THORNTON TOMASETTI, Inc. | 2000-10-11 | CORPORATION SERVICE COMPANY | Honig, Robert LOfficerSquarzini, MichaelOfficer | Active | |
| Delaware | THORNTON TOMASETTI, INC. | 2001-04-12 | CORPORATION SERVICE COMPANY | — | Unknown | |
| Florida | THORNTON TOMASETTI, INC. | 1996-07-10 | CORPORATION SERVICE COMPANY | MICHAEL SQUARZINIDirector, OfficerANDREW GOLDBAUMOfficer8 more | Active | |
| Georgia | THORNTON TOMASETTI, INC. | 2006-08-01 | Corporation Service Company | Michael SquarziniOfficerAndrew GoldbaumOfficer1 more | Active | |
| Hawaii | THORNTON TOMASETTI, INC. | 2006-10-24 | CORPORATION SERVICE COMPANY | PANARIELLO,GARYDirectorDIMAGGIO,PETERDirector, Officer8 more | Active | |
| Iowa | THORNTON TOMASETTI, INC. | 2006-10-02 | CORPORATION SERVICE COMPANY | PAGONA V E PHILLIPSDirectorElisabeth MalschDirector8 more | Active | |
| Idaho | THORNTON TOMASETTI, INC. | 2008-08-08 | CORPORATION SERVICE COMPANY | Peter DiMaggioDirectorMichael SquarziniDirector12 more | Active | |
| Indiana | THORNTON TOMASETTI, INC. | 2004-08-23 | CORPORATION SERVICE COMPANY | — | Active | |
| Kansas | THORNTON TOMASETTI, INC. | 2006-08-02 | CORPORATION SERVICE COMPANY | — | Active | |
| Kentucky | THORNTON TOMASETTI INC. | 2007-09-04 | Corporation Service Company | Gary PanarielloDirectorPeter DiMaggioDirector, Officer8 more | Active | |
| Louisiana | THORNTON TOMASETTI, INC. | 2003-04-21 | CORPORATION SERVICE COMPANY | Pagona Van EepoelDirectorR. Wayne StocksOfficer, Director11 more | Active | |
| Massachusetts | THORNTON TOMASETTI, INC. | 1999-10-14 | CORPORATION SERVICE COMPANY | Michael SquarziniOfficer, DirectorElisabeth MalschDirector10 more | Active | |
| Maine | THORNTON TOMASETTI, INC. | 2007-10-19 | CORPORATION SERVICE COMPANY | — | Active | |
| Minnesota | Thornton Tomasetti, Inc. | 2002-08-05 | Corporation Service Company | Michael SquarziniOfficer | Active | |
| Mississippi | Thornton Tomasetti, Inc. | 2007-04-02 | CORPORATION SERVICE COMPANY | Karina WilliamsOfficerPagona VE PhillipsDirector8 more | Active | |
| Montana | THORNTON TOMASETTI, INC. | 2008-08-25 | CORPORATION SERVICE COMPANY | GRANT MCCULLAGHDirectorJohn AbruzzoDirector10 more | Active | |
| North Dakota | THORNTON TOMASETTI, INC. | 2006-10-05 | CORPORATION SERVICE COMPANY | — | Active | |
| New Hampshire | Thornton Tomasetti, Inc. | 2008-03-25 | CORPORATION SERVICE COMPANY | Elisabeth MalschDirectorJohn AbruzzoDirector10 more | Active | |
| New Mexico | THORNTON TOMASETTI, INC. | 2008-09-15 | CORPORATION SERVICE COMPANY | BRUCE GIBBONSDirectorELISABETH MALSCHDirector19 more | Active | |
| Nevada | THORNTON TOMASETTI, INC. | 2005-03-21 | CORPORATION SERVICE COMPANY* | Mark TamaroDirectorScott LomaxDirector9 more | Active | |
| New York | THORNTON TOMASETTI, INC. | 1933-05-10 | CORPORATION SERVICE COMPANY | MICHAEL SQUARZINI AND PETER DIMAGGIOOfficer | Active | |
| Ohio | THORNTON TOMASETTI, INC. | 1997-08-29 | CORPORATION SERVICE COMPANY | — | Active | |
| Oregon | THORNTON TOMASETTI, INC. | 2008-08-13 | CORPORATION SERVICE COMPANY | THOMAS RITTENHOUSE IIIOfficerR WAYNE STOCKSOfficer | Active | |
| Rhode Island | THORNTON TOMASETTI, INC. | 2005-06-07 | CORPORATION SERVICE COMPANY | ELISABETH MALSCHDirectorMARK TAMARODirector7 more | Active | |
| South Carolina | THORNTON TOMASETTI, INC. | 2006-11-07 | CORPORATION SERVICE COMPANY | — | Active | |
| South Dakota | THORNTON TOMASETTI, INC. | 2008-08-05 | CORPORATION SERVICE COMPANY | — | Active | |
| Tennessee | THORNTON TOMASETTI, INC. | 1998-02-11 | CORPORATION SERVICE COMPANY | — | Active | |
| Texas | Thornton Tomasetti, Inc. | 1997-07-03 | Corporation Service Company d/b/a CSC-Lawyers Incorporating Service Company | ANDREW GOLDBAUMOfficerR WAYNE STOCKSOfficer3 more | Active | |
| Virginia | THORNTON TOMASETTI, INC. | 2006-08-17 | CORPORATION SERVICE COMPANY | Scott LomaxOfficerElisabeth MalschOfficer8 more | Active | |
| Vermont | THORNTON TOMASETTI, INC. | 2007-10-08 | CORPORATION SERVICE COMPANY | Michael SquarziniOfficer, DirectorMark TamaroDirector10 more | Active | |
| Washington | THORNTON TOMASETTI, INC. | 2008-10-06 | CORPORATION SERVICE COMPANY | SCOTT LOMAXDirectorJOHN ABRUZZODirector9 more | Active | |
| West Virginia | THORNTON TOMASETTI, INC. | 2012-10-03 | CORPORATION SERVICE COMPANY | THOMAS SCARANGELLO (EXECUTIVE CHAIRMAN)DirectorPETER DIMAGGIO (CO-CEO / DIRECTOR)Director2 more | Active | |
| Wyoming | Thornton Tomasetti, Inc. | 2008-10-27 | Corporation Service Company | — | Active | |
Companies and people linked to THORNTON TOMASETTI, INC. in the state registers through shared officers, a shared registered agent, shared filing contacts or a shared address. Service companies file for many unrelated businesses — a shared agent, address or contact alone does not prove affiliation.
company person group former role
Browse the indexed registries by state, or look up any debtor name free, at UCC lien search.
| State | Permit | Issued | Type | Location | Status | |
|---|---|---|---|---|---|---|
| New York | — | 2025-09-22 | Mechanical Systems | — | Signed-off | |
| New York | — | 2025-05-29 | Plumbing | — | Signed-off | |
| New York | — | 2024-08-15 | Structural | — | Signed-off | |
| New York | — | 2024-08-15 | General Construction | — | Signed-off | |
| State | License / ID | Type | Issued | Status | |
|---|---|---|---|---|---|
| New Mexico | BR-2024-041721 | Business License Commercial | 2024-10-12 | Converted Record | |
| New Mexico | COM-2020-361597 | Business License Commercial | 2024-10-12 | Archived Legacy - PLN | |
| New Mexico | BR-2023-039999 | Business License Commercial | 2023-10-12 | Converted Record | |
| New Mexico | BR-2022-044512 | Business License Commercial | 2022-10-12 | Converted Record | |
| New Mexico | BR-2021-035550 | Business License Commercial | 2021-10-12 | Converted Record | |
| New Mexico | COM-2021-364014 | Business License Commercial | 2021-04-20 | Archived Legacy - PLN | |
| New Mexico | BR-2020-029257 | Business License Commercial | 2020-03-19 | Out of Business | |
| New Mexico | COM-2018-349195 | Business License Commercial | 2020-03-19 | Archived Legacy - PLN | |
| New Mexico | BR-2019-001597 | Business License Commercial | 2019-03-19 | Out of Business | |
| New Hampshire | 01692 | Engineer COA | 2008-02-14 | Active | |
| Case | Filed | Job title | Wage | Worksite | Status | |
|---|---|---|---|---|---|---|
| I-200-25266-328473 | 2025-09-23 | Project Director | $110,490/yr | New York | Certified | |
| I-200-25266-326726 | 2025-09-22 | Senior Engineer “ Structure | $100,131/yr | New York | Certified | |
| I-200-25241-275585 | 2025-08-29 | Project Engineer - Structure | $113,838/yr | San Francisco | Certified | |
| I-200-25231-253234 | 2025-08-19 | Senior Project Engineer “ Renewal | $114,156/yr | Newark | Certified | |
| I-200-25230-250438 | 2025-08-18 | Senior Engineer | $91,000/yr | Houston | Certified | |
| I-200-25225-238778 | 2025-08-13 | Project Engineer - Structure | $113,838/yr | San Francisco | Certified | |
| I-200-25224-236875 | 2025-08-12 | Senior Project Consultant | $88,900/yr | New York | Certified | |
| I-200-25196-176437 | 2025-07-15 | Associate, Renewal | $125,000/yr | Newark | Certified | |
| I-200-25196-176388 | 2025-07-15 | Project Engineer, Structure | $95,000/yr | Fort Lauderdale | Certified | |
| I-200-25196-176325 | 2025-07-15 | Associate, Renewal | $125,000/yr | Newark | Withdrawn | |
Showing the latest 100 of 368 records.
| State | Workforce | Hiring sites | Enrolled | Industry | Status | |
|---|---|---|---|---|---|---|
| 12 states | 500 to 999 | 15 | 10/8/2008 | PROFESSIONAL, SCIENTIFIC, AND TECHNICAL SERVICES (54) | Open | |
Employee-benefit plan filings by THORNTON TOMASETTI, INC. with the Department of Labor. Employee and revenue figures are modeled estimates derived from retirement-plan participant counts and industry ratios — not official headcount or reported revenue.
| Employees (modeled) | ≈1,420 · plan year 2025 |
|---|---|
| Est. annual revenue (modeled) | $372.9M |
| Benefit plans | 401(k) plan on file |
| Filing history | 27 plan years filed, 1999–2025 |
| Sponsor EIN | 13-1251070 |
| Plan year | Employees (est.) | Participants | Plan assets | Revenue (est.) | 401(k) | |
|---|---|---|---|---|---|---|
| 2025 | ≈1,420 | 1,212 (1,275 active) | — | $372.9M | Welfare | |
| 2024 | ≈1,370 | 1,706 (1,237 active) | $468.6M | $438.2M | 401(k) | |
| 2023 | ≈1,290 | 1,627 (1,165 active) | $389.1M | $400.1M | 401(k) | |
| 2022 | ≈1,190 | 1,549 (1,075 active) | $317.6M | $362.5M | 401(k) | |
| 2021 | ≈1,200 | 1,510 (1,083 active) | $395.6M | $343.8M | 401(k) | |
| 2020 | ≈1,120 | 1,481 (1,008 active) | $348.1M | $323.6M | 401(k) | |
| 2019 | ≈1,110 | 1,453 (995 active) | $280.5M | $323.7M | 401(k) | |
| 2018 | ≈1,140 | 1,333 (1,028 active) | $219.2M | $325.9M | 401(k) | |
| 2017 | ≈1,100 | 1,313 (994 active) | $233.1M | $309.7M | 401(k) | |
| 2016 | ≈1,090 | 973 (984 active) | $191.3M | $304.1M | 401(k) | |
Matched Form 5500 filing records:
| Plan | Plan year | Participants | EIN | |
|---|---|---|---|---|
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
| THORNTON TOMASETTI, INC. 401(K) PROFIT SHARING PLAN | — | — | — | |
Federal court records load when you reach this section.
Companies adjacent to THORNTON TOMASETTI, INC. in the Wisconsin Secretary of State register, in alphabetical order.
Netstate aggregates public records from federal, state and municipal sources; records are matched to this company by its registered legal names. Latest source snapshot 2026-08-07. Document getpalm-companies/3211-3338-6781.