Top 100 Contractors in PSC K0: Modification of Equipment, Aug 2025–Jul 2026

Name: Top 100 Contractors in PSC K0: Modification of Equipment, 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 K0: Modification of Equipment, FY2025.

The top 10 won 76% of PSC K0 contract dollars from August 2025 through July 2026

Contract obligations: $4,022,166,586 Net of deobligations, by contracts coded PSC K0 or a code under it
Contractors: 343 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $985 million, 22.9% 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	Lockheed Martin Corporation 12 awardees, including Sikorsky Aircraft Corporation Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$985,356,325	22.9%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	The Boeing Company 9 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$547,356,690	12.7%	Rank history: #4 in FY2021, #5 in FY2022, #2 in FY2023, #3 in FY2024 and #3 in FY2025; up 1 since Aug 2024–Jul 2025.
3	General Dynamics Corporation 6 awardees, including General Dynamics Information Technology, Inc., General Dynamics Land Systems Inc. and General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$481,029,375	11.2%	Rank history: #2 in FY2021, #2 in FY2022, #5 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since Aug 2024–Jul 2025.
4	RTX Corporation 21 awardees, including Raytheon Company and Rockwell Collins, Inc. Top agencies DOT (Department of Transportation) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$386,486,482	9.0%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023, #6 in FY2024 and #5 in FY2025; up 1 since Aug 2024–Jul 2025.
5	Northrop Grumman Systems Corporation 13 awardees Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) OSD (Office of the Secretary of Defense)	$321,282,332	7.5%	Rank history: #5 in FY2021, #6 in FY2022, #6 in FY2023, #4 in FY2024 and #4 in FY2025; down 1 since Aug 2024–Jul 2025.
6	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$180,241,301	4.2%	Rank history: #7 in FY2021, #4 in FY2022, #4 in FY2023, #5 in FY2024 and #6 in FY2025; unchanged since Aug 2024–Jul 2025.
7	BAE Systems 4 awardees, including BAE Systems Technology Solutions & Services Inc. and BAE Systems Land and Armaments L.P. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$156,114,595	3.6%	Rank history: #6 in FY2021, #7 in FY2022, #7 in FY2023, #7 in FY2024 and #7 in FY2025; unchanged since Aug 2024–Jul 2025.
8	Scientific Research Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DCMA (Defense Contract Management Agency)	$77,928,233	1.8%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; up 49 since Aug 2024–Jul 2025.
9	Atlas Technologies Inc. Top agencies Navy (Department of the Navy)	$73,328,011	1.7%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; new, not ranked in Aug 2024–Jul 2025.
10	Advanced Systems & Software Engineering Technologies LLC Top agencies Navy (Department of the Navy)	$59,595,826	1.4%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2023, #9 in FY2024 and #9 in FY2025; unchanged since Aug 2024–Jul 2025.
11	L3Harris Technologies, Inc. 11 awardees, including L3 Technologies, Inc. and L3Harris Technologies Integrated Systems L.P. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$50,085,388	1.2%	Rank history: #10 in FY2021, #8 in FY2022, #12 in FY2023, #12 in FY2024 and #8 in FY2025; unchanged since Aug 2024–Jul 2025.
12	Analytic Services Inc. Through Advanced Technology International Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$45,758,034	1.1%	Rank history: not on the FY2021 list, #56 in FY2022, #36 in FY2023, not on the FY2024 list and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	Amentum Holdings, Inc. Through Amentum Services, Inc. Top agencies Navy (Department of the Navy)	$43,226,126	1.0%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #10 in FY2025; down 4 since Aug 2024–Jul 2025.
14	Electronic Warfare Associates, Inc. 2 awardees, including EWA Triad, LLC Top agencies Navy (Department of the Navy)	$38,010,939	0.9%	Rank history: #32 in FY2021, #30 in FY2022, #39 in FY2023, #78 in FY2024 and #13 in FY2025; new, not ranked in Aug 2024–Jul 2025.
15	Tetra Tech, Inc. Through Advanced Management Technology, Inc. Top agencies DOT (Department of Transportation)	$34,168,950	0.8%	Rank history: #21 in FY2021, #12 in FY2022, #11 in FY2023, #16 in FY2024 and #17 in FY2025; up 2 since Aug 2024–Jul 2025.
16	CACI International Inc. Through Caci, Inc. - Federal Top agencies Navy (Department of the Navy)	$31,398,584	0.7%	Rank history: #17 in FY2021, #71 in FY2022, not on the FY2023–FY2024 lists and #25 in FY2025; up 13 since Aug 2024–Jul 2025.
17	Magee Technologies LLC Top agencies Navy (Department of the Navy)	$26,850,482	0.6%	Rank history: not on the FY2021–FY2023 lists, #53 in FY2024 and #19 in FY2025; up 3 since Aug 2024–Jul 2025.
18	Strategic Mission Systems, LLC Top agencies USAF (Department of the Air Force)	$24,866,448	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
19	Modern Technology Solutions, Inc. Top agencies USAF (Department of the Air Force)	$23,204,742	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
20	The Mil Corporation Top agencies Navy (Department of the Navy)	$21,305,690	0.5%	Rank history: #38 in FY2021, #36 in FY2022, #34 in FY2023, #28 in FY2024 and #18 in FY2025; down 1 since Aug 2024–Jul 2025.
21	Huntington Ingalls Industries, Inc. 3 awardees, including HII Technical Solutions Corporation Top agencies Navy (Department of the Navy)	$21,206,998	0.5%	Rank history: #8 in FY2021, #23 in FY2022, #13 in FY2023, #10 in FY2024 and #14 in FY2025; down 9 since Aug 2024–Jul 2025.
22	General Atomics 2 awardees, including General Atomics Aerotec Systems GMBH Top agencies Navy (Department of the Navy)	$19,686,358	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
23	Vigor Industrial LLC Through Vigor Works LLC Top agencies Army (Department of the Army)	$15,910,296	0.4%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Aug 2024–Jul 2025.
24	Science Applications International Corporation Top agencies Navy (Department of the Navy)	$14,796,987	0.3%	Rank history: #19 in FY2021, #18 in FY2022, #15 in FY2023, #18 in FY2024 and #24 in FY2025; unchanged since Aug 2024–Jul 2025.
25	Chugach Alaska Corporation Through Chugach Dynamic Solutions LLC Top agencies Navy (Department of the Navy)	$13,990,923	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
26	Systems Application & Technologies Inc. Top agencies Navy (Department of the Navy)	$13,681,634	0.3%	Rank history: #23 in FY2021, #20 in FY2022, #23 in FY2023, #20 in FY2024 and #28 in FY2025; unchanged since Aug 2024–Jul 2025.
27	Calista Corp Through Yulista Contract Services LLC Top agencies USAF (Department of the Air Force)	$13,137,726	0.3%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Chugach Technical Solutions LLC Top agencies Navy (Department of the Navy)	$12,962,901	0.3%	Rank history: #86 in FY2021, #26 in FY2022, #16 in FY2023, #17 in FY2024 and #23 in FY2025; down 10 since Aug 2024–Jul 2025.
29	Firefly Aerospace Inc. Through Scitec Innovations LLC Top agencies MDA (DOD Missile Defense Agency)	$12,917,772	0.3%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Centurum Information Technology Inc. Top agencies Navy (Department of the Navy)	$12,671,304	0.3%	Rank history: not on the FY2021–FY2024 lists and #36 in FY2025; up 9 since Aug 2024–Jul 2025.
31	Renk America LLC Top agencies Army (Department of the Army)	$12,631,272	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
32	New Directions Technologies, Inc. Top agencies Navy (Department of the Navy)	$11,777,002	0.3%	Rank history: #26 in FY2021, #22 in FY2022, #26 in FY2023, #33 in FY2024 and #34 in FY2025; up 8 since Aug 2024–Jul 2025.
33	Fathom 4 LLC Top agencies Navy (Department of the Navy)	$10,799,473	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	Dayton T. Brown, Inc. Top agencies Navy (Department of the Navy)	$10,019,651	0.2%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and #22 in FY2025; down 13 since Aug 2024–Jul 2025.
35	X-Bow Launch Systems Inc. Top agencies Navy (Department of the Navy)	$10,000,000	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
36	Torch Technologies Inc. Top agencies Navy (Department of the Navy)	$9,334,201	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
37	KBR Wyle Services LLC Top agencies Navy (Department of the Navy)	$8,880,033	0.2%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #20 in FY2025; down 12 since Aug 2024–Jul 2025.
38	Denmar Technical Services Inc. Top agencies NASA (National Aeronautics and Space Administration)	$8,463,276	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
39	Govcio, LLC Through Salient Crgt, Inc. Top agencies Navy (Department of the Navy)	$8,335,414	0.2%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies Navy (Department of the Navy)	$7,817,422	0.2%	Rank history: not on the FY2021 list, #59 in FY2022, not on the FY2023 list, #46 in FY2024 and #35 in FY2025; down 2 since Aug 2024–Jul 2025.
41	Teya Support Services LLC Top agencies Navy (Department of the Navy)	$7,649,393	0.2%	Rank history: not on the FY2021–FY2024 lists and #30 in FY2025; down 5 since Aug 2024–Jul 2025.
42	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies Navy (Department of the Navy)	$7,611,645	0.2%	Rank history: #15 in FY2021, #17 in FY2022, #19 in FY2023, #26 in FY2024 and #54 in FY2025; new, not ranked in Aug 2024–Jul 2025.
43	Nakupuna Consulting LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$6,963,243	0.2%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #37 in FY2025; down 9 since Aug 2024–Jul 2025.
44	Bristol Bay Native Corporation 2 awardees, including STS Systems Defense LLC and Aerostar Environmental, LLC Top agencies Navy (Department of the Navy)	$6,234,259	0.1%	Rank history: not on the FY2021–FY2024 lists and #45 in FY2025; new, not ranked in Aug 2024–Jul 2025.
45	CNI Aviation Advantage, A Joint Venture, LLC Top agencies USAF (Department of the Air Force)	$5,881,856	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, not on the FY2023 list, #34 in FY2024 and #38 in FY2025; down 10 since Aug 2024–Jul 2025.
46	Metson Marine Services, Inc. Top agencies Navy (Department of the Navy)	$5,861,768	0.1%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #41 in FY2025; down 3 since Aug 2024–Jul 2025.
47	Saab, Inc. Top agencies Navy (Department of the Navy)	$5,429,836	0.1%	Rank history: not on the FY2021–FY2024 lists and #29 in FY2025; down 10 since Aug 2024–Jul 2025.
48	Kairos, Inc. Top agencies Navy (Department of the Navy)	$5,334,814	0.1%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #51 in FY2025; up 4 since Aug 2024–Jul 2025.
49	A Sonabend Company, Inc. Top agencies Navy (Department of the Navy)	$5,067,654	0.1%	Rank history: #42 in FY2021, #51 in FY2022, #41 in FY2023, #42 in FY2024 and #48 in FY2025; down 2 since Aug 2024–Jul 2025.
50	Canadian Commercial Corporation Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$4,966,933	0.1%	Rank history: not on the FY2021–FY2023 lists, #79 in FY2024 and #62 in FY2025; new, not ranked in Aug 2024–Jul 2025.
51	Advanced Crane Technologies LLC Top agencies Navy (Department of the Navy)	$4,814,052	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
52	Dunbar Mechanical Contractors, LLC Top agencies VA (Department of Veterans Affairs)	$4,678,807	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
53	Sierra Nevada Company, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$4,532,441	0.1%	Rank history: not on the FY2021 list, #45 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
54	PPI Technical Services LLC Top agencies USAF (Department of the Air Force)	$4,411,182	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
55	Integrated Security Technologies Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$4,377,520	0.1%	Rank history: #47 in FY2021, #67 in FY2022, #58 in FY2023, #61 in FY2024 and #66 in FY2025; up 10 since Aug 2024–Jul 2025.
56	Saalex Corp Top agencies Navy (Department of the Navy)	$4,221,055	0.1%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #53 in FY2025; down 5 since Aug 2024–Jul 2025.
57	J.f. Taylor, Inc. Top agencies Navy (Department of the Navy)	$4,068,711	0.1%	Rank history: #63 in FY2021, #43 in FY2022, #51 in FY2023, #52 in FY2024 and #50 in FY2025; down 2 since Aug 2024–Jul 2025.
58	V2X, Inc. 2 awardees, including V2X Aerospace LLC and Advantor Systems II LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,467,184	0.1%	Rank history: not on the FY2021–FY2023 lists, #22 in FY2024 and #21 in FY2025; down 36 since Aug 2024–Jul 2025.
59	Avenger Aerospace Solutions Inc. Top agencies NASA (National Aeronautics and Space Administration)	$3,260,610	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	Oshkosh Corporation Through Oshkosh Defense LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,156,356	0.1%	Rank history: not on the FY2021–FY2024 lists and #58 in FY2025; up 8 since Aug 2024–Jul 2025.
61	Applied Management Corp Top agencies Navy (Department of the Navy)	$3,129,960	0.1%	Rank history: #54 in FY2021, #65 in FY2022, #68 in FY2023, #47 in FY2024 and #67 in FY2025; down 2 since Aug 2024–Jul 2025.
62	Kratos Unmanned Aerial Systems, Inc. Top agencies Navy (Department of the Navy)	$2,900,728	0.1%	Rank history: not on the FY2021–FY2023 lists, #67 in FY2024 and #70 in FY2025; unchanged since Aug 2024–Jul 2025.
63	Carahsoft Technology Corp Top agencies Navy (Department of the Navy)	$2,800,000	0.1%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; new, not ranked in Aug 2024–Jul 2025.
64	Agile Defense, LLC Top agencies DHS (Department of Homeland Security)	$2,593,156	0.1%	Rank history: #53 in FY2021, #47 in FY2022, not on the FY2023–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
65	Frontier Electronic Systems Corp Top agencies Navy (Department of the Navy)	$2,579,671	0.1%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and #59 in FY2025; down 4 since Aug 2024–Jul 2025.
66	Mag DS Corp Top agencies Navy (Department of the Navy)	$2,557,722	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 4 since Aug 2024–Jul 2025.
67	Wartech Engineering LLC Top agencies Army (Department of the Army)	$2,450,909	0.1%	Rank history: not on the FY2021–FY2024 lists and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
68	Textron Inc. 2 awardees, including Textron Systems Corporation Top agencies Navy (Department of the Navy)	$2,295,696	0.1%	Rank history: #77 in FY2021, #24 in FY2022, #96 in FY2023, not on the FY2024 list and #64 in FY2025; up 33 since Aug 2024–Jul 2025.
69	Defense Systems and Solutions Top agencies Army (Department of the Army)	$2,267,643	0.1%	Rank history: not on the FY2021 list, #13 in FY2022, not on the FY2023–FY2024 lists and #15 in FY2025; down 54 since Aug 2024–Jul 2025.
70	Strategic Enterprise Solutions Corporation Top agencies USAF (Department of the Air Force)	$2,138,004	<0.1%	Rank history: not on the FY2021 list, #73 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
71	Science & Technology Corporation Top agencies Army (Department of the Army)	$2,028,531	<0.1%	Rank history: #40 in FY2021, #33 in FY2022, #47 in FY2023, #49 in FY2024 and #52 in FY2025; down 23 since Aug 2024–Jul 2025.
72	Teledyne Technologies Incorporated Through Teledyne Flir Defense, LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$1,978,767	<0.1%	Rank history: #81 in FY2021, not on the FY2022–FY2024 lists and #72 in FY2025; up 35 since Aug 2024–Jul 2025.
73	Leonardo S.p.A. 2 awardees, including Rada Technologies LLC and DRS Advanced ISR LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,975,427	<0.1%	Rank history: #22 in FY2021, #15 in FY2022, not on the FY2023–FY2024 lists and #44 in FY2025; down 31 since Aug 2024–Jul 2025.
74	CGW Technologies Inc. Top agencies Navy (Department of the Navy)	$1,749,181	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	Sustainable System Solutions LLC Top agencies Army (Department of the Army)	$1,744,422	<0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023, #45 in FY2024 and #65 in FY2025; down 19 since Aug 2024–Jul 2025.
76	Iron Sword Enterprises, LLC Top agencies Army (Department of the Army)	$1,456,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; new, not ranked in Aug 2024–Jul 2025.
77	Vsolvit LLC Top agencies Navy (Department of the Navy)	$1,402,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 1 since Aug 2024–Jul 2025.
78	Avtech Research Corporation Top agencies USAF (Department of the Air Force)	$1,321,951	<0.1%	Rank history: #43 in FY2021, #55 in FY2022, #53 in FY2023, #87 in FY2024 and #80 in FY2025; down 1 since Aug 2024–Jul 2025.
79	General Electric Company Top agencies Navy (Department of the Navy)	$1,270,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
80	Ahtna Logistics, LLC Top agencies Navy (Department of the Navy)	$1,245,283	<0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; down 13 since Aug 2024–Jul 2025.
81	Hyperion Technology Group Inc Top agencies Navy (Department of the Navy)	$1,181,588	<0.1%	Rank history: not on the FY2021–FY2023 lists, #88 in FY2024 and #61 in FY2025; down 15 since Aug 2024–Jul 2025.
82	Crane Electronics, Inc. Top agencies Navy (Department of the Navy)	$945,554	<0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 1 since Aug 2024–Jul 2025.
83	Government Marketing and Procurement, LLC Top agencies DOT (Department of Transportation)	$900,629	<0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023, not on the FY2024 list and #32 in FY2025; down 53 since Aug 2024–Jul 2025.
84	Safran Power USA LLC Through Idemia Identity & Security USA LLC Top agencies DHS (Department of Homeland Security)	$638,659	<0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Aug 2024–Jul 2025.
85	Ahtna Builders, LLC Top agencies Commerce (Department of Commerce)	$617,528	<0.1%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; new, not ranked in Aug 2024–Jul 2025.
86	Service Mechanical Inc. Top agencies National Gallery of Art	$581,597	<0.1%	Rank history: #99 in FY2021, not on the FY2022–FY2024 lists and #82 in FY2025; up 23 since Aug 2024–Jul 2025.
87	Macomber Cryogenics, Inc. Top agencies VA (Department of Veterans Affairs)	$576,500	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
88	Phygen, Inc. Top agencies Army (Department of the Army)	$562,841	<0.1%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #100 in FY2025; up 11 since Aug 2024–Jul 2025.
89	Scriptpro USA Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$526,566	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 15 since Aug 2024–Jul 2025.
90	Alabama Controls, Inc. Top agencies Army (Department of the Army)	$522,955	<0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #86 in FY2025; down 6 since Aug 2024–Jul 2025.
91	Kongsberg Discovery US LLC Top agencies Navy (Department of the Navy)	$517,107	<0.1%	Rank history: not on the FY2021–FY2023 lists, #91 in FY2024 and #78 in FY2025; down 19 since Aug 2024–Jul 2025.
92	Colossal Contracting LLC Top agencies DOI (Department of the Interior)	$513,013	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
93	Physical Sciences Inc. Top agencies DHS (Department of Homeland Security)	$508,640	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
94	American Systems Corporation Top agencies Navy (Department of the Navy)	$505,675	<0.1%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and #49 in FY2025; down 50 since Aug 2024–Jul 2025.
95	Serco Inc Top agencies USAF (Department of the Air Force)	$480,769	<0.1%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; down 49 since Aug 2024–Jul 2025.
96	Rebel Strike, LLC Top agencies USAF (Department of the Air Force)	$458,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Aug 2024–Jul 2025.
97	Peak Signals, LLC Top agencies DOI (Department of the Interior)	$452,650	<0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 39 since Aug 2024–Jul 2025.
98	Eaton Corporation Top agencies DOS (Department of State)	$446,058	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Hutchinson Industries Inc Top agencies Navy (Department of the Navy)	$438,140	<0.1%	Rank history: not on the FY2021–FY2023 lists, #56 in FY2024 and not on the FY2025 list; down 45 since Aug 2024–Jul 2025.
100	CPI Electron Device Business, Inc. Through Microwave Power Products, Inc. Top agencies Navy (Department of the Navy)	$436,349	<0.1%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; new, not ranked in Aug 2024–Jul 2025.

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100 of 343 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC K0

Code	Net obligations	Largest contractor
K058 Modification of Equipment: Communication, Detection, and Coherent Radiation Equipment	$1,183,274,948	Lockheed Martin Corporation
K016 Modification of Equipment: Aircraft Components and Accessories	$1,084,516,392	The Boeing Company
K023 Modification of Equipment: Ground Effect Vehicles, Motor Vehicles, Trailers, and Cycles	$63,614,938	BAE Systems
K099 Modification of Equipment: Miscellaneous	$36,709,169	Huntington Ingalls Industries, 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 $4.3 billion 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 K0 contractors in Aug 2025–Jul 2026?

1. Lockheed Martin Corporation ($985M), 2. The Boeing Company ($547M), 3. General Dynamics Corporation ($481M), 4. RTX Corporation ($386M), 5. Northrop Grumman Systems Corporation ($321M), 6. Leidos Holdings, Inc. ($180M), 7. BAE Systems ($156M), 8. Scientific Research Corporation ($77.9M), 9. Atlas Technologies Inc. ($73.3M), 10. Advanced Systems & Software Engineering Technologies LLC ($59.6M).

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