Top 100 Contractors in NAICS 54138: Testing Laboratories and Services, FY2025

Name: Top 100 Contractors in NAICS 54138: Testing Laboratories and Services, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 37% of FY2025 NAICS 54138 contract dollars

Contract obligations: $567,937,125 Net of deobligations, by contracts coded NAICS 54138 or a code under it
Contractors: 1,155 Parent companies with an obligation
Largest contractor: Astrion Group, LLC $61 million, 9.0% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Astrion Group, LLC Top agencies NASA (National Aeronautics and Space Administration)	$61,002,786	9.0%	Rank history: not on the FY2021 list, #44 in FY2022, #2 in FY2023 and #3 in FY2024; up 2 since FY2024.
2	Agile Defense, LLC Top agencies DISA (Defense Information Systems Agency)	$46,874,620	6.9%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2024; unchanged since FY2024.
3	Merrick & Company Top agencies USDA (Department of Agriculture)	$22,828,343	3.4%	Rank history: not on the FY2021–FY2023 lists and #40 in FY2024; up 37 since FY2024.
4	Transportation Research Center Inc. Top agencies DOT (Department of Transportation)	$21,969,849	3.3%	Rank history: #4 in FY2021, #5 in FY2022, #3 in FY2023 and #5 in FY2024; up 1 since FY2024.
5	The Bionetics Corporation Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$21,777,500	3.2%	Rank history: #2 in FY2021, #4 in FY2022, #6 in FY2023 and #8 in FY2024; up 3 since FY2024.
6	RTX Corporation 3 awardees, including Raytheon Company Top agencies USAF (Department of the Air Force)	$20,543,305	3.0%	Rank history: #3 in FY2021, #3 in FY2022, #4 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Lovelace Biomedical Research Institute Top agencies HHS (Department of Health and Human Services)	$16,821,304	2.5%	Rank history: not on the FY2021–FY2024 lists; new.
8	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies USAF (Department of the Air Force)	$14,746,339	2.2%	Rank history: not on the FY2021–FY2024 lists; new.
9	Emory University Top agencies HHS (Department of Health and Human Services)	$12,495,121	1.9%	Rank history: not on the FY2021 list, #17 in FY2022, #1 in FY2023 and #23 in FY2024; up 14 since FY2024.
10	Guidehouse Inc. Through Aptim Federal Services, LLC Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency) OSD (Office of the Secretary of Defense)	$11,949,964	1.8%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; up 14 since FY2024.
11	Mccrone Associates Inc. Top agencies USAF (Department of the Air Force)	$9,969,699	1.5%	Rank history: not on the FY2021–FY2024 lists; new.
12	Linde Special Projects LLC Top agencies USAF (Department of the Air Force)	$8,494,210	1.3%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and not on the FY2024 list; returned.
13	University of California, Davis Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) USAF (Department of the Air Force)	$8,258,329	1.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; up 37 since FY2024.
14	OLH Technical Services, LLC Top agencies DOJ (Department of Justice)	$8,247,213	1.2%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; up 3 since FY2024.
15	Azenta US Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$7,773,177	1.2%	Rank history: not on the FY2021–FY2024 lists; up 330 since FY2024.
16	Baylor College of Medicine Top agencies HHS (Department of Health and Human Services)	$7,637,373	1.1%	Rank history: #12 in FY2021, #13 in FY2022, #8 in FY2023 and #9 in FY2024; down 7 since FY2024.
17	Infinity Biologix LLC Top agencies VA (Department of Veterans Affairs)	$6,111,557	0.9%	Rank history: #6 in FY2021, #10 in FY2022, not on the FY2023 list and #20 in FY2024; up 3 since FY2024.
18	Teledyne Technologies Incorporated 2 awardees, including Teledyne Brown Engineering, Inc. and Teledyne Flir Defense, LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$5,660,127	0.8%	Rank history: #18 in FY2021, #32 in FY2022, #20 in FY2023 and #25 in FY2024; up 7 since FY2024.
19	Chemtex Environmental Laboratory, Inc. Top agencies EPA (Environmental Protection Agency)	$5,581,437	0.8%	Rank history: not on the FY2021 list, #47 in FY2022, not on the FY2023 list and #59 in FY2024; up 40 since FY2024.
20	Bonner Analytical Testing Co Top agencies EPA (Environmental Protection Agency)	$5,505,500	0.8%	Rank history: not on the FY2021 list, #38 in FY2022, #57 in FY2023 and #43 in FY2024; up 23 since FY2024.
21	Alutiiq Essential Services LLC Top agencies NASA (National Aeronautics and Space Administration)	$5,345,261	0.8%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 27 since FY2024.
22	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force)	$5,313,520	0.8%	Rank history: #19 in FY2021, #23 in FY2022, #26 in FY2023 and #27 in FY2024; up 5 since FY2024.
23	MRIGLOBAL Top agencies DOD (Department of Defense)	$5,268,831	0.8%	Rank history: not on the FY2021–FY2022 lists, #22 in FY2023 and #22 in FY2024; down 1 since FY2024.
24	Consolidated Safety Services Incorporated Top agencies EPA (Environmental Protection Agency)	$5,046,137	0.7%	Rank history: #33 in FY2021, #45 in FY2022, #38 in FY2023 and #38 in FY2024; up 14 since FY2024.
25	The Broad Institute, Inc. Top agencies HHS (Department of Health and Human Services)	$4,790,857	0.7%	Rank history: #5 in FY2021, #15 in FY2022, #41 in FY2023 and #7 in FY2024; down 18 since FY2024.
26	Bangham Engineering Inc. Top agencies DOT (Department of Transportation)	$4,785,099	0.7%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; up 4 since FY2024.
27	Gryphon Technologies L.C. Top agencies USAF (Department of the Air Force)	$4,650,862	0.7%	Rank history: not on the FY2021–FY2023 lists and #31 in FY2024; up 4 since FY2024.
28	Semanticbits LLC Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency)	$4,463,001	0.7%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 9 since FY2024.
29	Techlaw Consultants Inc. Top agencies EPA (Environmental Protection Agency)	$4,187,201	0.6%	Rank history: #69 in FY2021, not on the FY2022–FY2023 lists and #35 in FY2024; up 6 since FY2024.
30	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$4,178,222	0.6%	Rank history: #22 in FY2021, #41 in FY2022, #35 in FY2023 and #29 in FY2024; down 1 since FY2024.
31	Sports Medicine Research and Testing Laboratory Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$4,093,670	0.6%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023 and #34 in FY2024; up 3 since FY2024.
32	Akesogen, Inc. Top agencies VA (Department of Veterans Affairs)	$4,000,000	0.6%	Rank history: #10 in FY2021, #8 in FY2022, #24 in FY2023 and #37 in FY2024; up 5 since FY2024.
33	Intertek USA Inc. Top agencies DLA (Defense Logistics Agency)	$3,913,476	0.6%	Rank history: not on the FY2021–FY2023 lists and #69 in FY2024; up 36 since FY2024.
34	Johns Hopkins University 2 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$3,824,549	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
35	Nicholson Construction Company Top agencies Army (Department of the Army)	$3,795,945	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
36	The Leland Stanford Junior University Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$3,258,348	0.5%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; up 31 since FY2024.
37	General Electric Company 2 awardees, including GE Energy Power Conversion Naval Systems Inc. and GE Aviation Systems LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$3,183,967	0.5%	Rank history: #17 in FY2021, #11 in FY2022, #30 in FY2023 and #47 in FY2024; up 10 since FY2024.
38	Soil and Land Use Technology, Inc. Top agencies DOT (Department of Transportation)	$3,180,107	0.5%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; up 22 since FY2024.
39	Precision for Medicine, Inc. Top agencies HHS (Department of Health and Human Services)	$3,081,394	0.5%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; up 18 since FY2024.
40	Verily Life Sciences LLC Top agencies HHS (Department of Health and Human Services)	$2,994,243	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
41	Serco Inc Top agencies EPA (Environmental Protection Agency)	$2,711,519	0.4%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #45 in FY2024; up 4 since FY2024.
42	Cape Fear Analytical, LLC Top agencies EPA (Environmental Protection Agency)	$2,696,266	0.4%	Rank history: not on the FY2021 list, #75 in FY2022 and not on the FY2023–FY2024 lists; returned.
43	SGS Canada Inc. Top agencies DOI (Department of the Interior)	$2,395,491	0.4%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; up 37 since FY2024.
44	The Regents of the University of Colorado Top agencies Commerce (Department of Commerce)	$2,311,275	0.3%	Rank history: #84 in FY2021, #63 in FY2022, #64 in FY2023 and not on the FY2024 list; up 97 since FY2024.
45	Brick and Byte Inc. Top agencies DOT (Department of Transportation)	$2,270,000	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
46	Solutions Through Innovative Technologies Inc. Top agencies USAF (Department of the Air Force)	$2,216,558	0.3%	Rank history: not on the FY2021 list, #55 in FY2022, #46 in FY2023 and #33 in FY2024; down 13 since FY2024.
47	Eustis Engineering, L.L.C. Top agencies Army (Department of the Army)	$2,011,501	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
48	The Medical University of South Carolina Top agencies VA (Department of Veterans Affairs)	$1,947,742	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
49	Fugro USA Land, Inc. Top agencies Army (Department of the Army)	$1,895,901	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
50	Applus Idiada Karco Engineering, LLC Top agencies DOT (Department of Transportation)	$1,889,582	0.3%	Rank history: #90 in FY2021, not on the FY2022 list, #50 in FY2023 and #56 in FY2024; up 6 since FY2024.
51	Kratos Sre, Inc. Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$1,871,085	0.3%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 32 since FY2024.
52	Altus, LLC Top agencies Army (Department of the Army)	$1,867,186	0.3%	Rank history: not on the FY2021 list, #24 in FY2022, #18 in FY2023 and #15 in FY2024; down 37 since FY2024.
53	Cherokee Nation System Solutions LLC Top agencies Commerce (Department of Commerce)	$1,806,144	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
54	Techfocus LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$1,776,188	0.3%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and #93 in FY2024; up 39 since FY2024.
55	Fisher Bioservices Inc. Top agencies HHS (Department of Health and Human Services)	$1,699,922	0.3%	Rank history: not on the FY2021–FY2024 lists; up 57 since FY2024.
56	Eagle Integrated Services, LLC Top agencies Navy (Department of the Navy)	$1,677,140	0.2%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and #66 in FY2024; up 10 since FY2024.
57	Aqua Survey, Inc. Top agencies Army (Department of the Army)	$1,657,420	0.2%	Rank history: #80 in FY2021, #58 in FY2022, #91 in FY2023 and #61 in FY2024; up 4 since FY2024.
58	Virginia Commonwealth University 2 awardees, including Virginia Polytechnic Institute & State University Top agencies DOT (Department of Transportation) Army (Department of the Army)	$1,593,523	0.2%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023 and #16 in FY2024; down 42 since FY2024.
59	University of Washington Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,571,433	0.2%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2024; down 31 since FY2024.
60	Tribologik Corp Top agencies Navy (Department of the Navy) DOI (Department of the Interior)	$1,558,067	0.2%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023 and #73 in FY2024; up 13 since FY2024.
61	Jung Research and Development Corp Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$1,536,535	0.2%	Rank history: not on the FY2021 list, #54 in FY2022, #53 in FY2023 and #49 in FY2024; down 12 since FY2024.
62	Battelle Memorial Institute Top agencies Army (Department of the Army) Navy (Department of the Navy)	$1,492,768	0.2%	Rank history: #73 in FY2021, #74 in FY2022, #96 in FY2023 and #74 in FY2024; up 12 since FY2024.
63	New York Genome Center, Inc. Top agencies HHS (Department of Health and Human Services)	$1,492,431	0.2%	Rank history: #20 in FY2021, not on the FY2022–FY2023 lists and #26 in FY2024; down 37 since FY2024.
64	Asrt, Inc. Top agencies HHS (Department of Health and Human Services)	$1,454,838	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
65	Valogic Bio, LLC Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$1,424,691	0.2%	Rank history: not on the FY2021 list, #82 in FY2022, #66 in FY2023 and #99 in FY2024; up 34 since FY2024.
66	Ardl Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$1,371,784	0.2%	Rank history: not on the FY2021 list, #92 in FY2022, #56 in FY2023 and not on the FY2024 list; up 266 since FY2024.
67	DNA Labs International Inc Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$1,349,550	0.2%	Rank history: not on the FY2021 list, #81 in FY2022, #70 in FY2023 and #64 in FY2024; down 3 since FY2024.
68	I-2-I Solutions, Inc. Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior) Army (Department of the Army)	$1,326,502	0.2%	Rank history: not on the FY2021–FY2024 lists; up 74 since FY2024.
69	Chugai Technos Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army)	$1,322,788	0.2%	Rank history: not on the FY2021–FY2024 lists; up 118 since FY2024.
70	Teraspatial Inc. Top agencies DMEA (Defense Microelectronics Activity)	$1,315,089	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
71	SGS Axys Analytical Services Ltd. Top agencies DOI (Department of the Interior)	$1,291,200	0.2%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; up 10 since FY2024.
72	Calspan, LLC Top agencies DOT (Department of Transportation)	$1,290,723	0.2%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 18 since FY2024.
73	Dayton T. Brown, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,268,678	0.2%	Rank history: #100 in FY2021 and not on the FY2022–FY2024 lists; up 85 since FY2024.
74	Enomis Idril JV LLC Top agencies Army (Department of the Army)	$1,255,337	0.2%	Rank history: not on the FY2021–FY2024 lists; up 213 since FY2024.
75	Dynamic Research Inc. Top agencies DOT (Department of Transportation)	$1,246,055	0.2%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2024; down 20 since FY2024.
76	PPI Technical Services LLC Top agencies USAF (Department of the Air Force)	$1,242,560	0.2%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and #87 in FY2024; up 11 since FY2024.
77	City of San Diego Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$1,216,521	0.2%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 11 since FY2024.
78	Transnetyx Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$1,205,084	0.2%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 1 since FY2024.
79	Winergy LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$1,181,863	0.2%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2023–FY2024 lists; up 22 since FY2024.
80	Spectral Energies LLC Top agencies Army (Department of the Army)	$1,150,216	0.2%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2024; up 14 since FY2024.
81	Applied Research In Acoustics LLC Top agencies Army (Department of the Army)	$1,149,000	0.2%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2024; up 14 since FY2024.
82	Doc Development, Inc. Top agencies USAF (Department of the Air Force)	$1,144,630	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #91 in FY2024; up 9 since FY2024.
83	Danaher Corporation 5 awardees, including Cepheid, Beckman Coulter, Inc. and Integrated DNA Technologies, Inc. Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$1,143,001	0.2%	Rank history: not on the FY2021–FY2024 lists; up 21 since FY2024.
84	Amentum Holdings, Inc. Through Amentum Services, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$1,121,510	0.2%	Rank history: not on the FY2021–FY2024 lists; up 159 since FY2024.
85	Hyperion Biotechnology, Inc. Top agencies VA (Department of Veterans Affairs)	$1,100,057	0.2%	Rank history: not on the FY2021–FY2024 lists; up 32 since FY2024.
86	RTI Laboratories Inc. Top agencies DOI (Department of the Interior) DHA (Defense Health Agency) Army (Department of the Army)	$1,093,978	0.2%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and #42 in FY2024; down 44 since FY2024.
87	Regents of the University of Michigan Top agencies DOT (Department of Transportation) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,071,524	0.2%	Rank history: #96 in FY2021, #29 in FY2022, #34 in FY2023 and #75 in FY2024; down 12 since FY2024.
88	J. Craig Venter Institute, Inc. Top agencies HHS (Department of Health and Human Services)	$1,041,427	0.2%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and not on the FY2024 list; up 17 since FY2024.
89	Deutsches Zentrum FÜR Luft- UND Raumfahrt E.V. Top agencies NASA (National Aeronautics and Space Administration)	$1,032,113	0.2%	Rank history: #46 in FY2021, #26 in FY2022, not on the FY2023 list and #12 in FY2024; down 77 since FY2024.
90	Phigenics LLC Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$1,025,016	0.2%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
91	Research Institute At Nationwide Children's Hospital Top agencies HHS (Department of Health and Human Services)	$1,002,589	0.1%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2024; down 45 since FY2024.
92	Nevada System of Higher Education Top agencies DOI (Department of the Interior)	$1,002,122	0.1%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; down 60 since FY2024.
93	Clym Environmental Services LLC Top agencies HHS (Department of Health and Human Services)	$998,383	0.1%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; down 25 since FY2024.
94	Converge Federal Solutions JV, LLC Top agencies Army (Department of the Army)	$975,248	0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and not on the FY2024 list; up 9 since FY2024.
95	Bureau Veritas North America Inc 2 awardees Top agencies HHS (Department of Health and Human Services) DHA (Defense Health Agency) Army (Department of the Army)	$973,537	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023 and #92 in FY2024; down 3 since FY2024.
96	DCS Corporation Top agencies USAF (Department of the Air Force)	$894,706	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2023 list and #96 in FY2024; unchanged since FY2024.
97	Transcat, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$886,751	0.1%	Rank history: not on the FY2021–FY2024 lists; up 137 since FY2024.
98	The Ohio State University Top agencies HHS (Department of Health and Human Services)	$867,755	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Landauer, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) HHS (Department of Health and Human Services)	$807,495	0.1%	Rank history: not on the FY2021–FY2024 lists; up 45 since FY2024.
100	Alaska Testlab, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$801,963	0.1%	Rank history: #41 in FY2021, #93 in FY2022 and not on the FY2023–FY2024 lists; returned.

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100 of 1,155 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54138

Code	Net obligations	Largest contractor
541380 Testing Laboratories and Services	$567,937,125	Astrion Group, LLC

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 $675 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. 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.
Fiscal year 2025 ran Oct 1, 2024 – Sep 30, 2025. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2024. "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. The step from FY2024 takes the color of the rank change beside it.
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 NAICS 54138 contractors in FY2025?

1. Astrion Group, LLC ($61M), 2. Agile Defense, LLC ($46.9M), 3. Merrick & Company ($22.8M), 4. Transportation Research Center Inc. ($22M), 5. The Bionetics Corporation ($21.8M), 6. RTX Corporation ($20.5M), 7. Lovelace Biomedical Research Institute ($16.8M), 8. ManTech International Corporation ($14.7M), 9. Emory University ($12.5M), 10. Guidehouse Inc. ($11.9M).

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