BesaGov

Top federal contractors in Wisconsin

1,442 SAM.gov-registered federal contractors based in Wisconsin. Ranked by lifetime federal award amount. Updated 2026-06-23.

Firms tracked
1,442
Top-50 lifetime $
$39.61B
Top NAICS
8

Top 50 federal contractors in Wisconsin

# Firm City NAICS Lifetime $ Contracts
1 Optum Public Sector Solutions, Inc. La Crosse 524114 $18.85B 107
2 State Of Wisconsin Department Of Health Services Madison 923120 $11.87B 44
3 Optumserve Health Services, Inc. La Crosse 621111 $3.48B 192
4 Wisconsin Department Of Public Instruction Madison 541720 $927.03M 9
5 Oshkosh Defense Llc Oshkosh 336350 $872.48M 8,916
6 University Of Wisconsin System Madison 541714 $737.81M 237
7 Amtec Corporation Janesville 332993 $408.94M 29
8 Department Of Military Affairs Wisconsin Madison 921190 $297.47M 16
9 Workforce Development, Wisconsin Department Of Madison 519290 $244.92M 15
10 Ge Precision Healthcare Llc Waukesha 334517 $194.50M 862
11 Wisconsin Physicians Service Insurance Corp. Madison 524292 $122.52M 19
12 Goodwill Industries Of Southeastern Wisconsin, Inc. Greendale 722310 $98.88M 38
13 The Medical College Of Wisconsin, Inc. Milwaukee 621399 $97.37M 198
14 Trc Global Mobility, Inc Milwaukee 531390 $97.31M 902
15 University Of Wisconsin System Milwaukee 611310 $69.71M 11
16 Oneida Nation Green Bay 623110 $69.41M 2
17 Konecranes Nuclear Equipment & Services, Llc New Berlin 333923 $62.34M 9
18 Whr Group, Inc Pewaukee 531390 $59.76M 663
19 The Lewin Group, Inc. La Crosse 541611 $57.65M 166
20 Trane U.S. Inc. La Crosse 541330 $53.22M 954
21 Johnson Controls, Inc Milwaukee 334290 $52.15M 2,389
22 Fairbanks Morse, Llc Beloit 333618 $51.99M 271
23 Pierce Manufacturing Inc Appleton 333120 $48.25M 227
24 Oneida Environmental, Llc Milwaukee 541620 $44.01M 15
25 J. F. Brennan Company, Inc. La Crosse 332312 $43.78M 32
26 Superior Health Quality Alliance Inc Madison 541618 $42.67M 3
27 Lakeside Foods Inc Manitowoc 311421 $42.17M 196
28 Flexion Inc Madison 541511 $41.87M 32
29 Michels Construction, Inc. Brownsville 237130 $38.78M 9
30 Krueger International, Inc. Green Bay 337214 $35.17M 11,247
31 Department Of Justice Wisconsin Madison — $31.57M 34
32 Optumserve Technology Services, Inc. La Crosse 541350 $29.01M 81
33 Ccs Lintech Jv Llc Milwaukee 541519 $28.89M 16
34 Masters Gallery Foods, Incorporated Plymouth 311513 $28.30M 117
35 S3 Aerodefense Llc Milwaukee 336320 $26.67M 497
36 Industries For The Blind And Visually Impaired, Inc. West Allis 315990 $26.33M 2,018
37 Marquette University Milwaukee 541715 $25.42M 24
38 Derco Aerospace, Inc. Milwaukee 332722 $25.11M 2,433
39 Command Cyber Solutions Llc Milwaukee 541512 $24.78M 12
40 Advancia Aeronautics, Llc Milwaukee 622110 $24.59M 42
41 City Of Madison Madison 334220 $24.03M 8
42 Allied Metal Tech, Llc Greenville 332993 $23.85M 2
43 Sustainment & Restoration Services, Llc Milwaukee 541519 $23.60M 74
44 Idsc Holdings Llc Kenosha 332216 $23.26M 113,009
45 Orc Industries, Inc. La Crosse 314910 $23.19M 60
46 Schutt Industries Of Clintonville, Wis., Inc. Clintonville 333998 $22.93M 142
47 Roen Salvage Co. Sturgeon Bay 237990 $21.21M 24
48 Statz Corp Middleton 332722 $20.51M 1,413
49 Drs Naval Power Systems Inc Menomonee Falls 334413 $19.75M 444
50 Pomp'S Tire Service, Inc. New Berlin 326211 $18.98M 263

Top NAICS in Wisconsin

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FAQ

How many federal contractors are based in Wisconsin?

BesaGov tracks 1,442 SAM.gov-registered firms whose physical state of business is Wisconsin. The list updates weekly as new entities register or update their SAM profile.

Who are the largest federal contractors in Wisconsin?

By lifetime federal award amount, the largest Wisconsin-based contractors include OPTUM PUBLIC SECTOR SOLUTIONS, INC., STATE OF WISCONSIN DEPARTMENT OF HEALTH SERVICES, OPTUMSERVE HEALTH SERVICES, INC.. See the full top-50 list above.

Can I get notified when a new firm registers in Wisconsin?

Yes. Sign up for the free weekly Wisconsin digest above. We'll email you new SAM.gov registrations and award activity for the state — no login required.

Is this data official?

Firm registrations come from SAM.gov entity public extracts. Lifetime award totals come from USAspending.gov. Both are official U.S. government data sources, refreshed weekly.