Top 100 Smithsonian Institution Contractors, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Universal Protection Service, Limited Partnership Top NAICS codes 561612 Security Guards and Patrol Services	$30,568,500	10.5%	Rank history: not on the FY2021–FY2023 lists, #5 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	Coakley & Williams Construction, Llc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$14,287,671	4.9%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
3	Uovo Art LLC Top NAICS codes 488991 Packing and Crating	$11,425,000	3.9%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Aug 2024–Jul 2025.
4	Kapp-Con Incorporated Top NAICS codes 236220 Commercial and Institutional Building Construction	$10,987,853	3.8%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5	Clark / Smoot / Consigli, A Joint Venture Top NAICS codes 236220 Commercial and Institutional Building Construction	$9,667,559	3.3%	Rank history: #1 in FY2021, #2 in FY2022, #5 in FY2023, #12 in FY2024 and #4 in FY2025; up 10 since Aug 2024–Jul 2025.
6	Smoot Construction LLC Through Associated Builders, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$9,268,486	3.2%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #2 in FY2025; down 3 since Aug 2024–Jul 2025.
7	Siris LLC Top NAICS codes 236220 Commercial and Institutional Building Construction 541310 Architectural Services	$7,640,136	2.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
8	Severn Associates LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$6,862,504	2.3%	Rank history: #18 in FY2021, not on the FY2022 list, #53 in FY2023, #95 in FY2024 and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
9	Biscayne Contractors, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$6,449,108	2.2%	Rank history: #10 in FY2021, #9 in FY2022, #56 in FY2023, #16 in FY2024 and #7 in FY2025; unchanged since Aug 2024–Jul 2025.
10	The Whiting-Turner Contracting Company Top NAICS codes 236220 Commercial and Institutional Building Construction	$6,380,348	2.2%	Rank history: not on the FY2021–FY2023 lists, #17 in FY2024 and #10 in FY2025; down 5 since Aug 2024–Jul 2025.
11	Infostructures Inc. Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals 541513 Computer Facilities Management Services	$5,530,841	1.9%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #19 in FY2025; up 8 since Aug 2024–Jul 2025.
12	Stantec Inc. Through Stantec Consulting Services Inc. Top NAICS codes 541310 Architectural Services	$5,005,544	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
13	Knowcean Consulting Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$4,440,718	1.5%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023, #24 in FY2024 and #20 in FY2025; up 14 since Aug 2024–Jul 2025.
14	Noresco, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$4,430,440	1.5%	Rank history: #20 in FY2021, #26 in FY2022, not on the FY2023 list, #29 in FY2024 and not on the FY2025 list; up 8 since Aug 2024–Jul 2025.
15	Siemens Industry Inc. Top NAICS codes 238210 Electrical Contractors and Other Wiring Installation Contractors 236220 Commercial and Institutional Building Construction 237110 Water and Sewer Line and Related Structures Construction	$3,717,101	1.3%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Aug 2024–Jul 2025.
16	Quotientsub LLC Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$3,545,685	1.2%	Rank history: #33 in FY2021, #30 in FY2022, #33 in FY2023, #26 in FY2024 and #21 in FY2025; up 9 since Aug 2024–Jul 2025.
17	Ewing Cole Inc. Top NAICS codes 541310 Architectural Services	$3,422,844	1.2%	Rank history: #45 in FY2021, #13 in FY2022, #13 in FY2023, #10 in FY2024 and #12 in FY2025; down 10 since Aug 2024–Jul 2025.
18	Romana Prosperity Construction Corporation Top NAICS codes 236220 Commercial and Institutional Building Construction	$3,107,750	1.1%	Rank history: not on the FY2021 list, #40 in FY2022, #62 in FY2023, not on the FY2024 list and #50 in FY2025; up 47 since Aug 2024–Jul 2025.
19	Parsons Corporation 2 awardees, including Ptsi Managed Services Inc. and Parsons Government Services Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths) 236220 Commercial and Institutional Building Construction	$3,077,744	1.1%	Rank history: not on the FY2021 list, #32 in FY2022, #25 in FY2023, #66 in FY2024 and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
20	Elcon Enterprises Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 238290 Other Building Equipment Contractors	$2,986,785	1.0%	Rank history: #31 in FY2021, #45 in FY2022, #19 in FY2023, #32 in FY2024 and #75 in FY2025; up 123 since Aug 2024–Jul 2025.
21	Constructora Rogers, S.A. (Conrosa) Top NAICS codes 236220 Commercial and Institutional Building Construction	$2,951,195	1.0%	Rank history: #92 in FY2021, #61 in FY2022, not on the FY2023–FY2024 lists and #23 in FY2025; up 43 since Aug 2024–Jul 2025.
22	The Christman Company Top NAICS codes 236220 Commercial and Institutional Building Construction	$2,917,667	1.0%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #41 in FY2025; down 18 since Aug 2024–Jul 2025.
23	Dell Technologies Inc. 2 awardees, including Dell Federal Systems L.P and Dell Marketing L.P. Top NAICS codes 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers 334111 Electronic Computer Manufacturing	$2,646,235	0.9%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #32 in FY2025; up 26 since Aug 2024–Jul 2025.
24	Integrated Construction Enterprises Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$2,467,526	0.8%	Rank history: not on the FY2021 list, #14 in FY2022, not on the FY2023 list, #81 in FY2024 and #33 in FY2025; up 57 since Aug 2024–Jul 2025.
25	CDW Government LLC Top NAICS codes 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$2,257,529	0.8%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 6 since Aug 2024–Jul 2025.
26	Goldbelt, Incorporated 2 awardees, including CP Marine, LLC and Goldbelt Operations Support Services LLC Top NAICS codes 541511 Custom Computer Programming Services 236220 Commercial and Institutional Building Construction	$2,234,549	0.8%	Rank history: #72 in FY2021 and not on the FY2022–FY2025 lists; up 99 since Aug 2024–Jul 2025.
27	Mills & Schnoering Architects LLC Top NAICS codes 541310 Architectural Services	$2,080,826	0.7%	Rank history: not on the FY2021–FY2023 lists, #85 in FY2024 and #84 in FY2025; up 64 since Aug 2024–Jul 2025.
28	Terra Site Constructors LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$2,042,797	0.7%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
29	Clark Construction Group LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,966,797	0.7%	Rank history: not on the FY2021 list, #10 in FY2022, #1 in FY2023, #1 in FY2024 and #30 in FY2025; down 19 since Aug 2024–Jul 2025.
30	Associated Builders, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,951,763	0.7%	Rank history: #9 in FY2021, #3 in FY2022, #2 in FY2023, #65 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
31	Microsoft Corporation Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 513210 Software Publishers	$1,804,849	0.6%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #43 in FY2025; up 143 since Aug 2024–Jul 2025.
32	Evcon-Cwc JV LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,778,957	0.6%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; up 77 since Aug 2024–Jul 2025.
33	F-Concepts, Inc. Top NAICS codes 561720 Janitorial Services	$1,764,930	0.6%	Rank history: not on the FY2021 list, #100 in FY2022, not on the FY2023–FY2024 lists and #35 in FY2025; up 10 since Aug 2024–Jul 2025.
34	Forus Contracting, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,743,041	0.6%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 121 since Aug 2024–Jul 2025.
35	Lendlease (Us) Construction Inc. Top NAICS codes 541310 Architectural Services 236220 Commercial and Institutional Building Construction	$1,722,964	0.6%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; down 14 since Aug 2024–Jul 2025.
36	Exelon Corporation Through Constellation Newenergy Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,635,419	0.6%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	Servicenow, Inc. Top NAICS codes 541519 Other Computer Related Services	$1,498,294	0.5%	Rank history: #84 in FY2021, #86 in FY2022, #89 in FY2023, #89 in FY2024 and #93 in FY2025; new, not ranked in Aug 2024–Jul 2025.
38	Potomac Software Group, LLC Top NAICS codes 541512 Computer Systems Design Services	$1,491,024	0.5%	Rank history: not on the FY2021 list, #27 in FY2022, #30 in FY2023, #31 in FY2024 and #28 in FY2025; down 12 since Aug 2024–Jul 2025.
39	Smithgroup, Inc. Top NAICS codes 541310 Architectural Services	$1,462,888	0.5%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and not on the FY2025 list; down 1 since Aug 2024–Jul 2025.
40	Xclipse Inc. Top NAICS codes 541511 Custom Computer Programming Services	$1,340,394	0.5%	Rank history: not on the FY2021 list, #37 in FY2022, #34 in FY2023, #45 in FY2024 and #38 in FY2025; down 3 since Aug 2024–Jul 2025.
41	World Wide Technology LLC Top NAICS codes 541519 Other Computer Related Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers 334112 Computer Storage Device Manufacturing	$1,326,019	0.5%	Rank history: not on the FY2021–FY2025 lists; up 164 since Aug 2024–Jul 2025.
42	Compass Federal Consulting Limited Liability Company Top NAICS codes 541513 Computer Facilities Management Services	$1,262,968	0.4%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #66 in FY2025; up 14 since Aug 2024–Jul 2025.
43	Goodby Silverstein & Partners, Inc. Top NAICS codes 541513 Computer Facilities Management Services 541810 Advertising Agencies	$1,225,500	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
44	Gwwo, Inc. Top NAICS codes 541310 Architectural Services	$1,217,574	0.4%	Rank history: #90 in FY2021, not on the FY2022 list, #48 in FY2023, not on the FY2024 list and #54 in FY2025; up 208 since Aug 2024–Jul 2025.
45	Quinn Evans Architects Inc. Top NAICS codes 541310 Architectural Services	$1,137,852	0.4%	Rank history: #57 in FY2021, #58 in FY2022, #69 in FY2023, #25 in FY2024 and #57 in FY2025; unchanged since Aug 2024–Jul 2025.
46	Raad Construction Group LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,131,711	0.4%	Rank history: not on the FY2021–FY2023 lists, #34 in FY2024 and #47 in FY2025; up 15 since Aug 2024–Jul 2025.
47	Tucson Building & Remodeling, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,129,501	0.4%	Rank history: #17 in FY2021, #43 in FY2022, #78 in FY2023, #48 in FY2024 and #61 in FY2025; up 37 since Aug 2024–Jul 2025.
48	Hartman-Cox Architects LLP Top NAICS codes 541310 Architectural Services	$1,120,457	0.4%	Rank history: not on the FY2021–FY2023 lists, #83 in FY2024 and #31 in FY2025; down 18 since Aug 2024–Jul 2025.
49	TEX / Am Construction Co., Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,068,816	0.4%	Rank history: #2 in FY2021, #7 in FY2022, #11 in FY2023, #27 in FY2024 and #17 in FY2025; down 36 since Aug 2024–Jul 2025.
50	Diaz Y Guardia, S.A. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,047,289	0.4%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #26 in FY2025; down 22 since Aug 2024–Jul 2025.
51	Kapstone Technologies, Inc. Top NAICS codes 541513 Computer Facilities Management Services	$1,020,000	0.3%	Rank history: #51 in FY2021, #75 in FY2022, #72 in FY2023, not on the FY2024 list and #64 in FY2025; up 9 since Aug 2024–Jul 2025.
52	K & G Tilt Up Services LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$973,560	0.3%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; up 115 since Aug 2024–Jul 2025.
53	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers 541519 Other Computer Related Services	$957,918	0.3%	Rank history: #77 in FY2021, #56 in FY2022, #55 in FY2023, #69 in FY2024 and #73 in FY2025; up 20 since Aug 2024–Jul 2025.
54	Ziger / Snead LLP Top NAICS codes 541310 Architectural Services	$941,686	0.3%	Rank history: not on the FY2021–FY2025 lists; up 443 since Aug 2024–Jul 2025.
55	Chickasaw Nation Through Technology Trends Group, LLC Top NAICS codes 541618 Other Management Consulting Services 541519 Other Computer Related Services	$936,249	0.3%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; new, not ranked in Aug 2024–Jul 2025.
56	Evolv Technologies Inc Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing	$904,134	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Kunkel Construction, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction 561612 Security Guards and Patrol Services	$882,338	0.3%	Rank history: #63 in FY2021, #53 in FY2022, #61 in FY2023, #49 in FY2024 and #22 in FY2025; down 40 since Aug 2024–Jul 2025.
58	Capitol Exhibit Services, Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$873,373	0.3%	Rank history: not on the FY2021–FY2023 lists, #97 in FY2024 and not on the FY2025 list; up 253 since Aug 2024–Jul 2025.
59	Meltech Corporation, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$845,256	0.3%	Rank history: #40 in FY2021, not on the FY2022 list, #85 in FY2023, #37 in FY2024 and not on the FY2025 list; down 30 since Aug 2024–Jul 2025.
60	Verizon 3 awardees, including Verizon Business Network Services LLC, Cellco Partnership and Verizon Washington, DC Inc. Top NAICS codes 334210 Telephone Apparatus Manufacturing 517311 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers (except Satellite)	$830,539	0.3%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 11 since Aug 2024–Jul 2025.
61	Production Solutions Inc. Top NAICS codes 541860 Direct Mail Advertising	$780,654	0.3%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	Ebsco Industries Inc. Through Ebsco Information Services, LLC Top NAICS codes 513120 Periodical Publishers	$780,342	0.3%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Aug 2024–Jul 2025.
63	Seguridad Permanente Y Proteccion S.A. Top NAICS codes 561612 Security Guards and Patrol Services	$777,411	0.3%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023, #72 in FY2024 and #77 in FY2025; up 7 since Aug 2024–Jul 2025.
64	Peopleready Inc. Top NAICS codes 238220 Plumbing, Heating, and Air-Conditioning Contractors	$765,992	0.3%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 13 since Aug 2024–Jul 2025.
65	At&T Inc. 2 awardees, including Att Mobility LLC and Bellsouth Telecommunications, LLC Top NAICS codes 517312 Wireless Telecommunications Carriers (except Satellite) 517111 Wired Telecommunications Carriers	$749,000	0.3%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #83 in FY2025; up 14 since Aug 2024–Jul 2025.
66	CLC Cabling Service, Inc. Top NAICS codes 541513 Computer Facilities Management Services	$747,052	0.3%	Rank history: #75 in FY2021, #41 in FY2022, #65 in FY2023, #82 in FY2024 and #63 in FY2025; down 8 since Aug 2024–Jul 2025.
67	Futrend Technology Inc. Top NAICS codes 611420 Computer Training 541519 Other Computer Related Services	$742,558	0.3%	Rank history: #37 in FY2021, #66 in FY2022, #39 in FY2023, #75 in FY2024 and #67 in FY2025; down 5 since Aug 2024–Jul 2025.
68	The Avalon Consulting Group, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$742,360	0.3%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 68 since Aug 2024–Jul 2025.
69	Veris Group, LLC Top NAICS codes 812990 All Other Personal Services	$718,060	0.2%	Rank history: not on the FY2021–FY2023 lists, #78 in FY2024 and #60 in FY2025; down 12 since Aug 2024–Jul 2025.
70	Intellimar Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$711,032	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023 and not on the FY2024–FY2025 lists; up 123 since Aug 2024–Jul 2025.
71	Serco Inc Top NAICS codes 541512 Computer Systems Design Services 541513 Computer Facilities Management Services	$710,955	0.2%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #96 in FY2025; up 45 since Aug 2024–Jul 2025.
72	Directus Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$709,260	0.2%	Rank history: not on the FY2021–FY2025 lists; up 22 since Aug 2024–Jul 2025.
73	Delta Designs Ltd Top NAICS codes 337127 Institutional Furniture Manufacturing 337215 Showcase, Partition, Shelving, and Locker Manufacturing	$706,285	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	CTG Federal, LLC Top NAICS codes 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers 541519 Other Computer Related Services	$699,736	0.2%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; up 27 since Aug 2024–Jul 2025.
75	Raventek Solution Partners, LLC Top NAICS codes 541519 Other Computer Related Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$698,367	0.2%	Rank history: not on the FY2021–FY2025 lists; up 56 since Aug 2024–Jul 2025.
76	Page Southerland Page, Inc. Top NAICS codes 541310 Architectural Services	$698,313	0.2%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #79 in FY2025; down 40 since Aug 2024–Jul 2025.
77	Epic Systems Inc. Top NAICS codes 541511 Custom Computer Programming Services	$680,333	0.2%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; new, not ranked in Aug 2024–Jul 2025.
78	N&S Property Services LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$677,824	0.2%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; up 28 since Aug 2024–Jul 2025.
79	Lexisnexis Special Services Inc Through Elsevier Inc. Top NAICS codes 513120 Periodical Publishers	$666,218	0.2%	Rank history: not on the FY2021–FY2025 lists; up 72 since Aug 2024–Jul 2025.
80	Reich & Petch Design International Top NAICS codes 541430 Graphic Design Services	$665,749	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
81	HSU Development, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$665,261	0.2%	Rank history: #23 in FY2021, #19 in FY2022, #20 in FY2023, #63 in FY2024 and #53 in FY2025; down 3 since Aug 2024–Jul 2025.
82	Belt Built Contracting, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$653,414	0.2%	Rank history: #19 in FY2021, #24 in FY2022, #26 in FY2023, #60 in FY2024 and #85 in FY2025; up 33 since Aug 2024–Jul 2025.
83	Dexian, LLC Through Disys Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$648,367	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Iron Bow Technologies, LLC Top NAICS codes 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$645,704	0.2%	Rank history: not on the FY2021–FY2025 lists; down 9 since Aug 2024–Jul 2025.
85	Design and Production Incorporated Top NAICS codes 712110 Museums	$645,186	0.2%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2023, #18 in FY2024 and #90 in FY2025; down 67 since Aug 2024–Jul 2025.
86	Sierrita Mining & Ranching Company LP Top NAICS codes 236220 Commercial and Institutional Building Construction	$642,961	0.2%	Rank history: #26 in FY2021, #35 in FY2022, #64 in FY2023, not on the FY2024 list and #56 in FY2025; down 33 since Aug 2024–Jul 2025.
87	Clark Construction LLC Through Clark Construction Group LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$602,985	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	Spacesaver Systems, Inc. Top NAICS codes 337215 Showcase, Partition, Shelving, and Locker Manufacturing 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance 337214 Office Furniture (except Wood) Manufacturing	$589,754	0.2%	Rank history: #62 in FY2021, not on the FY2022–FY2023 lists, #64 in FY2024 and #13 in FY2025; down 76 since Aug 2024–Jul 2025.
89	Architrave P.C. Top NAICS codes 541310 Architectural Services	$545,654	0.2%	Rank history: #36 in FY2021, #28 in FY2022, #44 in FY2023, #50 in FY2024 and #80 in FY2025; down 20 since Aug 2024–Jul 2025.
90	Proquest LLC 2 awardees, including Ex Libris USA Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services 541519 Other Computer Related Services	$534,835	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Ondaro LLC Top NAICS codes 541511 Custom Computer Programming Services	$530,235	0.2%	Rank history: not on the FY2021–FY2025 lists; up 2 since Aug 2024–Jul 2025.
92	Picturae Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$525,507	0.2%	Rank history: not on the FY2021–FY2023 lists, #73 in FY2024 and not on the FY2025 list; down 16 since Aug 2024–Jul 2025.
93	Four Points Technology, L.L.C. Top NAICS codes 541519 Other Computer Related Services 423430 Computer and Computer Peripheral Equipment and Software Merchant Wholesalers	$507,032	0.2%	Rank history: not on the FY2021–FY2025 lists; up 262 since Aug 2024–Jul 2025.
94	Medical Faculty Associates, Inc. Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists)	$500,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
95	Doliveira DJB JV II LLC Top NAICS codes 238160 Roofing Contractors	$489,552	0.2%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #44 in FY2025; down 63 since Aug 2024–Jul 2025.
96	Advantek Management Concepts Limited Liability Company Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$488,942	0.2%	Rank history: not on the FY2021–FY2025 lists; up 39 since Aug 2024–Jul 2025.
97	Sandow Construction Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$475,034	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Diversified Laboratory Repair Inc. Top NAICS codes 238290 Other Building Equipment Contractors 811310 Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance	$474,914	0.2%	Rank history: not on the FY2021–FY2025 lists; up 106 since Aug 2024–Jul 2025.
99	Aeon Preservation Services, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$464,436	0.2%	Rank history: #56 in FY2021, not on the FY2022 list, #77 in FY2023, not on the FY2024 list and #97 in FY2025; up 63 since Aug 2024–Jul 2025.
100	URS Group Inc-Hartman Cox Architects LLP A Joint Venture Top NAICS codes 541310 Architectural Services	$454,381	0.2%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 95 since Aug 2024–Jul 2025.

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $292 million obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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