Top 100 Contractors in PSC AS: Transportation R&D Services, Aug 2025–Jul 2026

Name: Top 100 Contractors in PSC AS: Transportation R&D Services, Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Code page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Contractors in PSC AS: Transportation R&D Services, FY2025.

The top 10 won 76% of PSC AS contract dollars from August 2025 through July 2026

Contract obligations: $529,339,634 Net of deobligations, by contracts coded PSC AS or a code under it
Contractors: 125 Parent companies with an obligation
Largest contractor: Napatree Technology LLC $265 million, 45.0% of obligations
Data as of: Nov 5, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Napatree Technology LLC Top agencies DOD (Department of Defense)	$265,382,200	45.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
2	RTX Corporation 4 awardees, including Raytheon Company Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration)	$40,584,800	6.9%	Rank history: #12 in FY2021, #7 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since Aug 2024–Jul 2025.
3	General Electric Company 2 awardees Top agencies NASA (National Aeronautics and Space Administration)	$38,304,433	6.5%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; down 2 since Aug 2024–Jul 2025.
4	Lockheed Martin Corporation 2 awardees, including Lockheed Martin Services, LLC Top agencies DOT (Department of Transportation) DARPA (Defense Advanced Research Projects Agency)	$29,658,758	5.0%	Rank history: #2 in FY2021, #2 in FY2022, #5 in FY2023, #13 in FY2024 and #3 in FY2025; down 1 since Aug 2024–Jul 2025.
5	Noblis, Inc. Top agencies DOT (Department of Transportation)	$17,119,001	2.9%	Rank history: #45 in FY2021, #6 in FY2022, #6 in FY2023, #3 in FY2024 and #4 in FY2025; unchanged since Aug 2024–Jul 2025.
6	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies DOT (Department of Transportation)	$13,374,080	2.3%	Rank history: #5 in FY2021, #4 in FY2022, #8 in FY2023, #4 in FY2024 and #5 in FY2025; down 2 since Aug 2024–Jul 2025.
7	Ensco Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$11,731,675	2.0%	Rank history: #20 in FY2021, #12 in FY2022, #4 in FY2023, #6 in FY2024 and #6 in FY2025; down 1 since Aug 2024–Jul 2025.
8	Pacific Layberthing South, LLC Top agencies DOT (Department of Transportation)	$10,321,542	1.8%	Rank history: not on the FY2021 list, #5 in FY2022, #12 in FY2023, #10 in FY2024 and #8 in FY2025; up 2 since Aug 2024–Jul 2025.
9	University of Oklahoma Top agencies DOT (Department of Transportation)	$10,000,000	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
10	AGR LLC 3 awardees, including SES Group & Associates, LLC and Engineering & Software Consultants, LLC Top agencies DOT (Department of Transportation)	$9,635,537	1.6%	Rank history: not on the FY2021–FY2024 lists and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
11	Toxcel LLC Top agencies DOT (Department of Transportation)	$6,080,790	1.0%	Rank history: #33 in FY2021, #72 in FY2022, not on the FY2023 list, #22 in FY2024 and #9 in FY2025; up 5 since Aug 2024–Jul 2025.
12	Diakon Solutions LLC Top agencies DOT (Department of Transportation)	$5,883,078	1.0%	Rank history: not on the FY2021 list, #56 in FY2022, #13 in FY2023, #11 in FY2024 and #11 in FY2025; up 2 since Aug 2024–Jul 2025.
13	Genex Systems, LLC Top agencies DOT (Department of Transportation)	$3,898,772	0.7%	Rank history: #31 in FY2021, #16 in FY2022, #9 in FY2023, #9 in FY2024 and #7 in FY2025; down 6 since Aug 2024–Jul 2025.
14	ICF International Inc. Through ICF Incorporated, L.L.C. Top agencies DOT (Department of Transportation)	$3,612,933	0.6%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #12 in FY2025; down 5 since Aug 2024–Jul 2025.
15	Iengineering Corporation Top agencies DOT (Department of Transportation)	$3,400,000	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
16	Ati, Inc. Top agencies DOT (Department of Transportation)	$2,938,069	0.5%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #13 in FY2025; up 1 since Aug 2024–Jul 2025.
17	Duos Technologies, Inc. Top agencies DOT (Department of Transportation)	$2,563,480	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
18	Intelligent Transportation Society of America (Its America) Top agencies DOT (Department of Transportation)	$2,351,075	0.4%	Rank history: #34 in FY2021, #52 in FY2022, #39 in FY2023, #81 in FY2024 and #28 in FY2025; up 38 since Aug 2024–Jul 2025.
19	Syntek Technologies, Inc. Top agencies DOT (Department of Transportation)	$2,188,132	0.4%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #15 in FY2025; up 3 since Aug 2024–Jul 2025.
20	University System of Maryland Through University of Maryland, College Park Top agencies DOT (Department of Transportation)	$1,811,878	0.3%	Rank history: not on the FY2021 list, #93 in FY2022, #32 in FY2023, #72 in FY2024 and #23 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Creare LLC Top agencies DOT (Department of Transportation)	$1,712,463	0.3%	Rank history: #26 in FY2021, #40 in FY2022, not on the FY2023 list, #45 in FY2024 and #87 in FY2025; up 12 since Aug 2024–Jul 2025.
22	Tranalytics, LLC Top agencies DOT (Department of Transportation)	$1,711,820	0.3%	Rank history: not on the FY2021 list, #100 in FY2022, #75 in FY2023, not on the FY2024 list and #85 in FY2025; up 80 since Aug 2024–Jul 2025.
23	X-Wave Innovations, Inc. Top agencies DOT (Department of Transportation)	$1,706,496	0.3%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; up 81 since Aug 2024–Jul 2025.
24	Sharma & Associates Inc Top agencies DOT (Department of Transportation)	$1,591,700	0.3%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and not on the FY2025 list; up 33 since Aug 2024–Jul 2025.
25	JFL Solutions, LLC Top agencies DOT (Department of Transportation)	$1,512,714	0.3%	Rank history: not on the FY2021–FY2025 lists; up 89 since Aug 2024–Jul 2025.
26	Innotech Systems LLC Top agencies DOT (Department of Transportation)	$1,499,714	0.3%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; up 96 since Aug 2024–Jul 2025.
27	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies DOT (Department of Transportation)	$1,475,398	0.3%	Rank history: not on the FY2021 list, #22 in FY2022, #35 in FY2023, #21 in FY2024 and #16 in FY2025; down 9 since Aug 2024–Jul 2025.
28	Stantec Inc. Through Stantec Consulting Services Inc. Top agencies DOT (Department of Transportation)	$1,350,290	0.2%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023, not on the FY2024 list and #24 in FY2025; down 1 since Aug 2024–Jul 2025.
29	Path-Tec LLC Top agencies DHA (Defense Health Agency)	$1,334,103	0.2%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #35 in FY2025; up 9 since Aug 2024–Jul 2025.
30	Infrasense, Inc. Top agencies DOT (Department of Transportation)	$1,324,722	0.2%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Aug 2024–Jul 2025.
31	Darkflite Inc. Top agencies DOT (Department of Transportation)	$1,263,000	0.2%	Rank history: not on the FY2021–FY2025 lists; up 96 since Aug 2024–Jul 2025.
32	Insi Cloud Inc Top agencies HHS (Department of Health and Human Services)	$1,256,639	0.2%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023, #88 in FY2024 and #64 in FY2025; up 39 since Aug 2024–Jul 2025.
33	Legacy Innovation Inc. Top agencies DOT (Department of Transportation)	$1,249,679	0.2%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; up 91 since Aug 2024–Jul 2025.
34	Railroad Technology and Services Limited Liability Company Top agencies DOT (Department of Transportation)	$1,243,590	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
35	Transportation Technology Center, Inc. Top agencies DOT (Department of Transportation)	$1,236,354	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
36	Applied Research Associates, Inc. Top agencies DOT (Department of Transportation)	$1,207,172	0.2%	Rank history: #50 in FY2021, #45 in FY2022, #59 in FY2023, not on the FY2024 list and #32 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	Redstone Technologies LLC Top agencies DOT (Department of Transportation)	$1,152,378	0.2%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and #46 in FY2025; up 22 since Aug 2024–Jul 2025.
38	Micro-X Inc. Top agencies DHS (Department of Homeland Security)	$1,047,824	0.2%	Rank history: #13 in FY2021, #23 in FY2022, #16 in FY2023, #62 in FY2024 and #10 in FY2025; down 25 since Aug 2024–Jul 2025.
39	Virginia Commonwealth University Health System Authority Through Virginia Polytechnic Institute & State University Top agencies DOT (Department of Transportation)	$1,027,867	0.2%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023, #8 in FY2024 and #30 in FY2025; down 31 since Aug 2024–Jul 2025.
40	Physical Sciences Inc. Top agencies DOT (Department of Transportation)	$1,008,431	0.2%	Rank history: not on the FY2021–FY2024 lists and #38 in FY2025; up 80 since Aug 2024–Jul 2025.
41	Saferstreet Solutions LLC Top agencies DOT (Department of Transportation)	$999,992	0.2%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 59 since Aug 2024–Jul 2025.
42	Tool, Inc. Top agencies DOT (Department of Transportation)	$997,533	0.2%	Rank history: not on the FY2021–FY2025 lists; up 69 since Aug 2024–Jul 2025.
43	The Mitre Corporation Top agencies DOT (Department of Transportation)	$991,715	0.2%	Rank history: not on the FY2021–FY2025 lists; up 53 since Aug 2024–Jul 2025.
44	Vanasse Hangen Brustlin, Inc. Top agencies DOT (Department of Transportation)	$981,532	0.2%	Rank history: #74 in FY2021, #24 in FY2022, #29 in FY2023, #14 in FY2024 and #17 in FY2025; down 33 since Aug 2024–Jul 2025.
45	Regents of the University of Michigan Top agencies DOT (Department of Transportation)	$968,895	0.2%	Rank history: not on the FY2021 list, #15 in FY2022, #28 in FY2023, #50 in FY2024 and #42 in FY2025; up 6 since Aug 2024–Jul 2025.
46	National Academy of Sciences Top agencies DOT (Department of Transportation)	$953,057	0.2%	Rank history: #54 in FY2021, not on the FY2022 list, #25 in FY2023, #20 in FY2024 and #18 in FY2025; down 27 since Aug 2024–Jul 2025.
47	Voxel Radar GMBH Top agencies DHS (Department of Homeland Security)	$943,775	0.2%	Rank history: #78 in FY2021, #31 in FY2022, not on the FY2023 list, #77 in FY2024 and #55 in FY2025; up 21 since Aug 2024–Jul 2025.
48	Weris, Inc. Top agencies DOT (Department of Transportation)	$886,930	0.2%	Rank history: not on the FY2021 list, #67 in FY2022, #70 in FY2023, not on the FY2024 list and #56 in FY2025; up 100 since Aug 2024–Jul 2025.
49	Advanced Asphalt Technologies LLC Top agencies DOT (Department of Transportation)	$854,802	0.1%	Rank history: not on the FY2021–FY2024 lists and #43 in FY2025; new, not ranked in Aug 2024–Jul 2025.
50	CDM Smith Inc. Through CDM Federal Programs Corporation Top agencies DOT (Department of Transportation)	$813,460	0.1%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	Dynamic Science, Inc. Top agencies DOT (Department of Transportation)	$771,014	0.1%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
52	Crash Research & Analysis, Inc. Top agencies DOT (Department of Transportation)	$765,329	0.1%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Aug 2024–Jul 2025.
53	University of South Carolina Top agencies DOT (Department of Transportation)	$690,187	0.1%	Rank history: not on the FY2021–FY2023 lists, #82 in FY2024 and #99 in FY2025; up 23 since Aug 2024–Jul 2025.
54	The University of Kentucky Research Foundation Top agencies DOT (Department of Transportation)	$614,843	0.1%	Rank history: not on the FY2021–FY2024 lists and #48 in FY2025; up 41 since Aug 2024–Jul 2025.
55	Peraton Inc. Top agencies Army (Department of the Army)	$601,246	0.1%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #27 in FY2025; down 40 since Aug 2024–Jul 2025.
56	Klaw Industries LLC Top agencies DOT (Department of Transportation)	$600,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; new, not ranked in Aug 2024–Jul 2025.
57	Aerovironment, Inc. 2 awardees Top agencies DOT (Department of Transportation)	$575,283	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
58	Washington Metropolitan Area Transit Authority Top agencies NEH (National Endowment for the Humanities)	$542,307	0.1%	Rank history: not on the FY2021 list, #59 in FY2022, #62 in FY2023, #74 in FY2024 and #59 in FY2025; up 33 since Aug 2024–Jul 2025.
59	WSP USA Solutions Inc 3 awardees, including WSP USA Inc. Top agencies DOT (Department of Transportation)	$499,747	0.1%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #50 in FY2025; down 27 since Aug 2024–Jul 2025.
60	Callentis Consulting Group LLC Top agencies DOT (Department of Transportation)	$497,106	0.1%	Rank history: not on the FY2021 list, #36 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
61	Battelle Memorial Institute Top agencies DOT (Department of Transportation)	$471,291	0.1%	Rank history: #44 in FY2021, #14 in FY2022, #17 in FY2023, #15 in FY2024 and #22 in FY2025; down 49 since Aug 2024–Jul 2025.
62	Rhomberg Sersa USA Inc. Top agencies DOT (Department of Transportation)	$469,192	0.1%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
63	University of Tennessee 2 awardees Top agencies DOT (Department of Transportation)	$468,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
64	Guidehouse Inc. Through Peraton Inc. Top agencies Army (Department of the Army)	$460,478	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	Ezdatamd LLC Top agencies DOT (Department of Transportation)	$449,999	0.1%	Rank history: #93 in FY2021, not on the FY2022–FY2024 lists and #58 in FY2025; new, not ranked in Aug 2024–Jul 2025.
66	Thornton Tomasetti, Inc. Top agencies DOT (Department of Transportation)	$437,711	0.1%	Rank history: not on the FY2021–FY2023 lists, #75 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
67	International Electronic Machines Corporation Top agencies DOT (Department of Transportation)	$416,874	0.1%	Rank history: not on the FY2021 list, #63 in FY2022, not on the FY2023 list, #100 in FY2024 and #61 in FY2025; up 25 since Aug 2024–Jul 2025.
68	Hptech Inc. Top agencies DOT (Department of Transportation)	$360,322	0.1%	Rank history: not on the FY2021–FY2023 lists, #93 in FY2024 and not on the FY2025 list; up 15 since Aug 2024–Jul 2025.
69	Vtech B.V. Top agencies DOT (Department of Transportation)	$358,400	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Aug 2024–Jul 2025.
70	University of South Florida Top agencies DOT (Department of Transportation)	$350,762	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; new, not ranked in Aug 2024–Jul 2025.
71	University of Missouri System Top agencies DOT (Department of Transportation)	$350,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; new, not ranked in Aug 2024–Jul 2025.
72	Board of Regents of the University of Nebraska Top agencies DOT (Department of Transportation)	$324,411	0.1%	Rank history: not on the FY2021–FY2025 lists; up 59 since Aug 2024–Jul 2025.
73	Protection Engineering Consultants LLC Top agencies DOT (Department of Transportation)	$312,981	0.1%	Rank history: not on the FY2021–FY2023 lists, #65 in FY2024 and #62 in FY2025; up 14 since Aug 2024–Jul 2025.
74	Southern Methodist University Inc Top agencies DOT (Department of Transportation)	$306,200	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	North Carolina State University Top agencies DOT (Department of Transportation)	$300,000	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
76	National Research Council Canada Top agencies DOT (Department of Transportation)	$300,000	0.1%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and not on the FY2025 list; up 4 since Aug 2024–Jul 2025.
77	Nanosonic Inc. Top agencies DOT (Department of Transportation)	$300,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; up 24 since Aug 2024–Jul 2025.
78	Texas A&M Transportation Institute Top agencies DOT (Department of Transportation)	$286,610	<0.1%	Rank history: not on the FY2021–FY2023 lists, #58 in FY2024 and #33 in FY2025; down 43 since Aug 2024–Jul 2025.
79	Texas A&M Engineering Experiment Station Top agencies DOT (Department of Transportation)	$273,004	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
80	Woolpert, Inc. Top agencies DOT (Department of Transportation)	$269,915	<0.1%	Rank history: not on the FY2021–FY2023 lists, #18 in FY2024 and not on the FY2025 list; down 54 since Aug 2024–Jul 2025.
81	Virginia Polytechnic Institute & State University Top agencies DOT (Department of Transportation)	$253,878	<0.1%	Rank history: not on the FY2021 list, #13 in FY2022, not on the FY2023 list, #30 in FY2024 and #60 in FY2025; down 52 since Aug 2024–Jul 2025.
82	University of California, San Diego Top agencies DOT (Department of Transportation)	$244,364	<0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; new, not ranked in Aug 2024–Jul 2025.
83	National Institute of Building Sciences Top agencies DOT (Department of Transportation)	$212,766	<0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; up 1 since Aug 2024–Jul 2025.
84	Kitware Inc. Top agencies DOT (Department of Transportation)	$206,500	<0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 28 since Aug 2024–Jul 2025.
85	Zkxkz LLC Top agencies DOT (Department of Transportation)	$206,499	<0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Aug 2024–Jul 2025.
86	Emprise Concepts, LLC Top agencies DOT (Department of Transportation)	$206,468	<0.1%	Rank history: not on the FY2021–FY2024 lists and #77 in FY2025; new, not ranked in Aug 2024–Jul 2025.
87	Insight Rail LLC Top agencies DOT (Department of Transportation)	$206,461	<0.1%	Rank history: not on the FY2021–FY2024 lists and #78 in FY2025; new, not ranked in Aug 2024–Jul 2025.
88	Diamond Age Technology LLC Top agencies DOT (Department of Transportation)	$206,450	<0.1%	Rank history: not on the FY2021–FY2024 lists and #79 in FY2025; new, not ranked in Aug 2024–Jul 2025.
89	FTL Labs Corp Top agencies DOT (Department of Transportation)	$206,448	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
90	Tgias LLC Top agencies DOT (Department of Transportation)	$206,426	<0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
91	Flexlynqs LLC Top agencies DOT (Department of Transportation)	$206,380	<0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
92	RIX Industries Top agencies DOT (Department of Transportation)	$204,573	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Aug 2024–Jul 2025.
93	Avawatz Co Top agencies DOT (Department of Transportation)	$201,759	<0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; new, not ranked in Aug 2024–Jul 2025.
94	Mosaic Atm, Inc. Top agencies DOT (Department of Transportation)	$199,873	<0.1%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, not on the FY2024 list and #92 in FY2025; up 12 since Aug 2024–Jul 2025.
95	New Math Data Pubsec LLC Top agencies DOT (Department of Transportation)	$198,207	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Aug 2024–Jul 2025.
96	Analogic Engineering, Inc. Top agencies DOT (Department of Transportation)	$165,033	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Red Equation Corp Top agencies DOT (Department of Transportation)	$153,372	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Southwest Research Institute Top agencies DOT (Department of Transportation)	$140,141	<0.1%	Rank history: #71 in FY2021, #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Board of Regents Tennessee Through Tennessee State University Top agencies DOT (Department of Transportation)	$123,819	<0.1%	Rank history: not on the FY2021 list, #79 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Jackson State University Top agencies DOT (Department of Transportation)	$118,527	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 25 since Aug 2024–Jul 2025.

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100 of 125 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC AS

Code	Net obligations	Largest contractor
AS12 Transportation R&D Services; Surface Transportation, Public Transit, and Rail; Applied Research	$341,114,562	Napatree Technology LLC
AS11 Transportation R&D Services; Surface Transportation, Public Transit, and Rail; Basic Research	$51,993,742	Noblis, Inc.

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 $590 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.

Quick answers

Who were the top 10 PSC AS contractors in Aug 2025–Jul 2026?

1. Napatree Technology LLC ($265M), 2. RTX Corporation ($40.6M), 3. General Electric Company ($38.3M), 4. Lockheed Martin Corporation ($29.7M), 5. Noblis, Inc. ($17.1M), 6. Leidos Holdings, Inc. ($13.4M), 7. Ensco Inc. ($11.7M), 8. Pacific Layberthing South, LLC ($10.3M), 9. University of Oklahoma ($10M), 10. AGR LLC ($9.64M).

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