Top 29 Contractors in PSC AJ15: General Science & Technology R&D Services; General Science & Technology; R&D Facilities & Major Equipment, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Parsons Corporation Through Parsons Government Services Inc. Top agencies Army (Department of the Army)	$51,943,761	38.4%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2023, #2 in FY2024 and #1 in FY2025; up 1 since Aug 2024–Jul 2025.
2	Emergent Biodefense Operations Lansing LLC Top agencies HHS (Department of Health and Human Services)	$19,464,480	14.4%	Rank history: not on the FY2021–FY2024 lists and #3 in FY2025; new, not ranked in Aug 2024–Jul 2025.
3	New Horizons Aeronautics, LLC Top agencies NASA (National Aeronautics and Space Administration)	$12,660,580	9.4%	Rank history: not on the FY2021 list, #1 in FY2022, #3 in FY2023, #4 in FY2024 and #4 in FY2025; up 1 since Aug 2024–Jul 2025.
4	Arctic Slope Regional Corporation Through Asrc Federal System Solutions LLC Top agencies Navy (Department of the Navy)	$10,632,973	7.9%	Rank history: #1 in FY2021, #3 in FY2022, #2 in FY2023, #3 in FY2024 and #2 in FY2025; down 1 since Aug 2024–Jul 2025.
5	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$10,511,182	7.8%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; up 13 since Aug 2024–Jul 2025.
6	Red Six Aerospace Inc. Top agencies USAF (Department of the Air Force)	$9,210,783	6.8%	Rank history: #16 in FY2021, #34 in FY2022, not on the FY2023–FY2024 lists and #5 in FY2025; up 4 since Aug 2024–Jul 2025.
7	Teva Pharmaceuticals Usa, Inc. Top agencies DHA (Defense Health Agency)	$6,138,177	4.5%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #7 in FY2025; unchanged since Aug 2024–Jul 2025.
8	SRC Inc. Top agencies Army (Department of the Army)	$2,718,963	2.0%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #9 in FY2025; up 3 since Aug 2024–Jul 2025.
9	Southwest Research Institute Top agencies NRC (Nuclear Regulatory Commission)	$2,421,361	1.8%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023, #8 in FY2024 and #13 in FY2025; down 1 since Aug 2024–Jul 2025.
10	RTX Corporation Through Logos Technologies, Llc. Top agencies Army (Department of the Army)	$1,701,058	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
11	Inotiv, Inc. Through Envigo Global Services Inc. Top agencies DHA (Defense Health Agency)	$1,594,420	1.2%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	Freedom Flight Works, Inc. Top agencies Army (Department of the Army)	$1,467,722	1.1%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #10 in FY2025; unchanged since Aug 2024–Jul 2025.
13	Neurolux Inc. Top agencies Army (Department of the Army)	$754,462	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
14	Alpha Development Inc. Top agencies Army (Department of the Army)	$441,076	0.3%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
15	The University of Iowa Top agencies DOT (Department of Transportation)	$418,716	0.3%	Rank history: not on the FY2021 list, #5 in FY2022, not on the FY2023 list, #6 in FY2024 and #35 in FY2025; down 6 since Aug 2024–Jul 2025.
16	Denver Health and Hospital Authority Top agencies HHS (Department of Health and Human Services)	$309,340	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
17	Deep Analytics LLC Top agencies DOI (Department of the Interior)	$260,572	0.2%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #23 in FY2025; new, not ranked in Aug 2024–Jul 2025.
18	Modalai, Inc. Top agencies Army (Department of the Army)	$220,568	0.2%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Aug 2024–Jul 2025.
19	Keysight Technologies, Inc. Through Spirent Federal Systems Inc. Top agencies Army (Department of the Army)	$180,640	0.1%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; new, not ranked in Aug 2024–Jul 2025.
20	YSI Inc. Top agencies DOI (Department of the Interior)	$180,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Elementum 3D, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$149,995	0.1%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	Katmai Diversified Services LLC Top agencies Army (Department of the Army)	$139,720	0.1%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; new, not ranked in Aug 2024–Jul 2025.
23	University of Wisconsin System Top agencies HHS (Department of Health and Human Services)	$132,875	0.1%	Rank history: not on the FY2021–FY2023 lists, #28 in FY2024 and #32 in FY2025; up 9 since Aug 2024–Jul 2025.
24	Sunwize Power & Battery LLC Top agencies DOI (Department of the Interior)	$50,366	<0.1%	Rank history: not on the FY2021–FY2024 lists and #37 in FY2025; new, not ranked in Aug 2024–Jul 2025.
25	Government Scientific Source Inc. Top agencies HHS (Department of Health and Human Services)	$40,227	<0.1%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2023, not on the FY2024 list and #38 in FY2025; new, not ranked in Aug 2024–Jul 2025.
26	Yellowscan, Inc. Top agencies Army (Department of the Army)	$19,800	<0.1%	Rank history: not on the FY2021–FY2024 lists and #40 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	Magplasma, Inc. Top agencies DHS (Department of Homeland Security)	$14,857	<0.1%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #36 in FY2025; up 2 since Aug 2024–Jul 2025.
28	Cenmed Enterprises Inc. Top agencies VA (Department of Veterans Affairs)	$5,700	<0.1%	Rank history: #26 in FY2021, #35 in FY2022, #34 in FY2023, #38 in FY2024 and #42 in FY2025; up 12 since Aug 2024–Jul 2025.
29	Johns Hopkins University Top agencies VA (Department of Veterans Affairs)	$3,024	<0.1%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; up 10 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 $135 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