Top 100 Contractors in PSC J028: Maintenance, Repair and Rebuilding of Equipment: Engines, Turbines, and Components, FY2021

Name: Top 100 Contractors in PSC J028: Maintenance, Repair and Rebuilding of Equipment: Engines, Turbines, and Components, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 93% of FY2021 PSC J028 contract dollars

Contract obligations: $1,799,658,795 Net of deobligations, by contracts coded PSC J028
Contractors: 178 Parent companies with an obligation
Largest contractor: RTX Corporation $1.12 billion, 60.7% 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	RTX Corporation 6 awardees, including Rockwell Collins, Inc. and Hamilton Sundstrand Corporation Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$1,122,231,684	60.7%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Rolls-Royce Military Aero Engines Ltd 5 awardees, including Rolls-Royce Corporation, Rolls-Royce Defense Services Inc. and Rolls-Royce Solutions America Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$321,542,810	17.4%	Rank history: #2 in FY2022, #2 in FY2023, #3 in FY2024 and not on the FY2025 list; unchanged since FY2020.
3	Lockheed Martin Corporation 2 awardees Top agencies USAF (Department of the Air Force)	$113,290,162	6.1%	Rank history: #3 in FY2022, #6 in FY2023, #39 in FY2024 and not on the FY2025 list; unchanged since FY2020.
4	Standardaero Aviation Holdings, Inc. 6 awardees, including Standard Aero (San Antonio) Inc., Standardaero Component Services, Inc. and Standard Aero Limited Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$46,763,040	2.5%	Rank history: #4 in FY2022, #4 in FY2023, #9 in FY2024 and #17 in FY2025; up 1 since FY2020.
5	General Electric Company 6 awardees, including GE Aviation Systems LLC, GE Renewables US LLC and General Electric International, Inc. Top agencies Navy (Department of the Navy) DOI (Department of the Interior) USAF (Department of the Air Force)	$37,945,167	2.1%	Rank history: #6 in FY2022, #5 in FY2023, #6 in FY2024 and #4 in FY2025; down 1 since FY2020.
6	Government of Canada Through Canadian Commercial Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$27,564,249	1.5%	Rank history: #7 in FY2022, #7 in FY2023, #19 in FY2024 and not on the FY2025 list; up 6 since FY2020.
7	Rolls-Royce Corporation Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$14,814,402	0.8%	Rank history: #8 in FY2022, not on the FY2023 list, #7 in FY2024 and not on the FY2025 list; down 1 since FY2020.
8	Air New Zealand Engineering Services Top agencies Navy (Department of the Navy)	$11,704,511	0.6%	Rank history: #9 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
9	Fairbanks Morse LLC 3 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army)	$10,368,293	0.6%	Rank history: #17 in FY2022, #8 in FY2023, #12 in FY2024 and not on the FY2025 list; up 13 since FY2020.
10	Aero Turbine, Inc. Top agencies USAF (Department of the Air Force)	$9,549,949	0.5%	Rank history: #5 in FY2022, #3 in FY2023, #4 in FY2024 and #18 in FY2025; up 1 since FY2020.
11	Boeing Distribution, Inc. Top agencies Navy (Department of the Navy)	$8,624,300	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
12	Rolls Wood Group (Repair & Overhauls) Ltd Through RWG Repair & Overhauls USA Inc. Top agencies Navy (Department of the Navy)	$7,081,832	0.4%	Rank history: #10 in FY2022, #9 in FY2023, #17 in FY2024 and not on the FY2025 list; up 5 since FY2020.
13	Flight Support, Inc. Top agencies USAF (Department of the Air Force)	$6,549,098	0.4%	Rank history: not on the FY2022 list, #10 in FY2023, #43 in FY2024 and not on the FY2025 list; up 1 since FY2020.
14	The Boeing Company 2 awardees, including Boeing Distribution, Inc. Top agencies Navy (Department of the Navy)	$6,420,725	0.3%	Rank history: #49 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
15	MTU Aero Engines Holding AG 2 awardees, including MTU Maintenance Berlin- Brandenburg GMBH and Vericor Power Systems LLC Top agencies Navy (Department of the Navy)	$6,258,757	0.3%	Rank history: #11 in FY2022, #18 in FY2023, #27 in FY2024 and not on the FY2025 list; down 8 since FY2020.
16	SFS Global / Tiburon JV Top agencies Army (Department of the Army)	$6,181,091	0.3%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
17	Electron Beam Development Corp Top agencies USAF (Department of the Air Force)	$4,579,390	0.2%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Aarcorp Through AAR Allen Services, Inc. Top agencies USAF (Department of the Air Force)	$4,467,652	0.2%	Rank history: #20 in FY2022, #14 in FY2023, #59 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
19	BBA Aviation PLC Through Dallas Airmotive, Inc. Top agencies USDA (Department of Agriculture)	$4,457,134	0.2%	Rank history: not on the FY2022 list, #25 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
20	Segers Aero Corp Top agencies USAF (Department of the Air Force)	$2,673,501	0.1%	Rank history: #13 in FY2022, #17 in FY2023, #33 in FY2024 and not on the FY2025 list; up 6 since FY2020.
21	Volkswagen AG 2 awardees, including Everllence Middle East and Africa L.l.c and Everllence Japan Ltd. Top agencies Navy (Department of the Navy)	$2,254,424	0.1%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
22	Fincantieri Marine Systems North America Inc. Top agencies Navy (Department of the Navy)	$2,229,839	0.1%	Rank history: #32 in FY2022, #34 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
23	Woodward Governor Company 2 awardees, including Woodward, Inc. and Woodward Fst, Inc. Top agencies USAF (Department of the Air Force)	$2,026,372	0.1%	Rank history: #24 in FY2022, #15 in FY2023, #29 in FY2024 and not on the FY2025 list; up 6 since FY2020.
24	Siemens Aktiengesellschaft Through Siemens Energy Inc. Top agencies HHS (Department of Health and Human Services)	$2,001,198	0.1%	Rank history: #23 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
25	Standard Aero (San Antonio) Inc. Top agencies Navy (Department of the Navy)	$1,913,524	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
26	Paradigm Manchester Inc. Top agencies USAF (Department of the Air Force)	$1,825,369	0.1%	Rank history: #40 in FY2022, not on the FY2023 list, #75 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
27	Andritz AG Through Andritz Hydro Corp Top agencies DOI (Department of the Interior) Army (Department of the Army)	$1,638,386	0.1%	Rank history: #18 in FY2022, #21 in FY2023, #52 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
28	Environmental Alternatives Inc. Top agencies Navy (Department of the Navy)	$1,010,533	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
29	R.s.l. Electronics Limited Top agencies USAF (Department of the Air Force)	$832,525	<0.1%	Rank history: #33 in FY2022, not on the FY2023 list, #36 in FY2024 and #32 in FY2025; up 19 since FY2020.
30	Total Online Protection LLC Top agencies VA (Department of Veterans Affairs)	$808,559	<0.1%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
31	Global Turbine Services, Inc. Top agencies USAF (Department of the Air Force)	$620,895	<0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; down 23 since FY2020.
32	G.o. Carlson, Inc. Top agencies Army (Department of the Army)	$600,000	<0.1%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
33	Triumph Group, Inc. Through AAR Component Services - Grand Prairie, Inc. Top agencies USAF (Department of the Air Force)	$453,340	<0.1%	Rank history: #97 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
34	Caterpillar Inc. 2 awardees, including Nippon Caterpillar Llc. Top agencies Navy (Department of the Navy)	$380,638	<0.1%	Rank history: #37 in FY2022, #31 in FY2023, #77 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
35	Canadian Commercial Corporation Top agencies USAF (Department of the Air Force)	$365,072	<0.1%	Rank history: #15 in FY2022, not on the FY2023 list, #8 in FY2024 and #5 in FY2025; down 2 since FY2020.
36	Siemens Energy Inc. Top agencies HHS (Department of Health and Human Services)	$352,034	<0.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
37	Raider Outboards Inc. Top agencies Navy (Department of the Navy)	$345,731	<0.1%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
38	Ferrotherm, LLC Top agencies USAF (Department of the Air Force)	$329,500	<0.1%	Rank history: #47 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2020.
39	Melton Sales & Service Top agencies Army (Department of the Army)	$318,557	<0.1%	Rank history: #42 in FY2022, not on the FY2023 list, #53 in FY2024 and #46 in FY2025; up 38 since FY2020.
40	Wartsila Defense Inc. Through Defense Maritime Solutions, Inc. Top agencies Navy (Department of the Navy)	$313,036	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	M International Inc. 2 awardees, including Mint Turbines LLC Top agencies USAF (Department of the Air Force)	$309,663	<0.1%	Rank history: #14 in FY2022, #12 in FY2023, #30 in FY2024 and not on the FY2025 list; down 18 since FY2020.
42	Mizuno Marine Co.,Ltd. Top agencies Navy (Department of the Navy)	$287,511	<0.1%	Rank history: #43 in FY2022, #40 in FY2023, #72 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	Penobscot Support Services, LLC Top agencies Army (Department of the Army)	$268,145	<0.1%	Rank history: #29 in FY2022, #19 in FY2023, #37 in FY2024 and #23 in FY2025; down 9 since FY2020.
44	MGT Djibouti SARL Top agencies USAF (Department of the Air Force)	$264,267	<0.1%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
45	Thomas Scientific LLC Through Chromalloy San Diego Corp Top agencies USAF (Department of the Air Force)	$245,347	<0.1%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
46	ZF Marine Propulsion Systems Miramar LLC Top agencies DHS (Department of Homeland Security)	$225,097	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Turbine Controls, LLC Top agencies USAF (Department of the Air Force)	$218,665	<0.1%	Rank history: #44 in FY2022, #49 in FY2023, #84 in FY2024 and not on the FY2025 list; up 11 since FY2020.
48	Soldream Inc. Top agencies USAF (Department of the Air Force)	$216,006	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
49	General Electric International, Inc. Top agencies USAF (Department of the Air Force)	$203,743	<0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	Sunset Marine, Inc. Top agencies Navy (Department of the Navy)	$194,861	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
51	Vergent Power Solutions LLC Top agencies VA (Department of Veterans Affairs)	$192,660	<0.1%	Rank history: #45 in FY2022, #37 in FY2023, #55 in FY2024 and #69 in FY2025; up 66 since FY2020.
52	Advanced Technology Systems Company, Inc. (OF Virginia) Top agencies USAF (Department of the Air Force)	$187,193	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Harnish Group Inc. Through N C Power Systems Co. Top agencies Navy (Department of the Navy)	$174,901	<0.1%	Rank history: #52 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
54	Three O LLC Top agencies DHS (Department of Homeland Security)	$171,742	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
55	True Excellence Group LLC Top agencies DHS (Department of Homeland Security)	$150,673	<0.1%	Rank history: not on the FY2022 list, #98 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
56	Timberline Tractor & Marine Inc. Top agencies Navy (Department of the Navy)	$149,834	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
57	Austin Welder & Generator Service, Inc. Top agencies VA (Department of Veterans Affairs)	$149,163	<0.1%	Rank history: #50 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; down 14 since FY2020.
58	BAE Systems PLC Through BAE Systems Information & Electronic Systems Integration Inc. Top agencies Navy (Department of the Navy)	$148,303	<0.1%	Rank history: not on the FY2022 list, #82 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
59	H & H Marine Services, Inc. Top agencies Army (Department of the Army)	$148,081	<0.1%	Rank history: #27 in FY2022, #36 in FY2023, not on the FY2024 list and #49 in FY2025; up 30 since FY2020.
60	Aeronautica Windpower, LLC Top agencies USAF (Department of the Air Force)	$133,550	<0.1%	Rank history: #58 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
61	Rockwell Collins-ESA Vision Systems Limited Liability Compan Through Collins Elbit Vision Systems, LLC Top agencies Navy (Department of the Navy)	$132,891	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
62	PAE Government Services Inc. Through Amentum Design and Facility Management Top agencies Army (Department of the Army)	$123,550	<0.1%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
63	Honeywell International Inc. 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$122,282	<0.1%	Rank history: #84 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 40 since FY2020.
64	Standardaero Component Services, Inc. Top agencies USAF (Department of the Air Force)	$118,300	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Oilkleen, Inc. Top agencies DHS (Department of Homeland Security)	$115,630	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
66	Jasper Electric Motors Inc. Top agencies Navy (Department of the Navy)	$110,000	<0.1%	Rank history: #61 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
67	Direct Towing, Inc. Top agencies USDA (Department of Agriculture)	$102,988	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 86 since FY2020.
68	Knox Roman, Llc. Top agencies VA (Department of Veterans Affairs)	$99,915	<0.1%	Rank history: #63 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
69	Port Amherst Ltd. Through Amherst Madison, Inc. Top agencies Army (Department of the Army)	$98,774	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Tominaga & Co., Ltd. Top agencies Navy (Department of the Navy)	$98,627	<0.1%	Rank history: #69 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
71	Endless Summer Aquatics Inc. Top agencies DHS (Department of Homeland Security)	$91,336	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
72	Louisiana Machinery Company, L.l.c Top agencies VA (Department of Veterans Affairs)	$78,135	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Alithos Anesti LLC Top agencies Navy (Department of the Navy)	$77,216	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
74	Global Power Group, Inc. Top agencies VA (Department of Veterans Affairs)	$75,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Altorfer Inc. Top agencies Army (Department of the Army)	$72,528	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
76	TS Government Solutions. LLC Top agencies DHS (Department of Homeland Security)	$61,800	<0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
77	Pas MRO Inc. Top agencies Navy (Department of the Navy)	$61,776	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
78	Melbourne Radiator, Inc. Top agencies USAF (Department of the Air Force)	$55,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Goff Diesel Injection, Inc. Top agencies USAF (Department of the Air Force)	$54,520	<0.1%	Rank history: #95 in FY2022, not on the FY2023–FY2024 lists and #44 in FY2025; up 3 since FY2020.
80	Kalvio LLC Top agencies Army (Department of the Army)	$52,770	<0.1%	Rank history: #73 in FY2022, #68 in FY2023, #76 in FY2024 and #70 in FY2025; new, not ranked in FY2020.
81	Pacific Power Group LLC 2 awardees Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs)	$52,104	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Team, Inc. Through Team Industrial Services, Inc. Top agencies USAF (Department of the Air Force)	$51,840	<0.1%	Rank history: not on the FY2022 list, #64 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
83	Grip Machinery and Reliability Services Top agencies Navy (Department of the Navy)	$47,837	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Rick Mccray Top agencies USDA (Department of Agriculture)	$45,803	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
85	E-Finity Distributed Generation LLC Top agencies USAF (Department of the Air Force)	$45,211	<0.1%	Rank history: #60 in FY2022, #75 in FY2023, #82 in FY2024 and #68 in FY2025; up 11 since FY2020.
86	Gibbs International, Inc. 2 awardees Top agencies USDA (Department of Agriculture)	$43,994	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	VSS Logistics LLC Top agencies VA (Department of Veterans Affairs)	$42,135	<0.1%	Rank history: #79 in FY2022, #59 in FY2023, #68 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
88	White Hand Global LLC Top agencies Army (Department of the Army)	$41,925	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Cummins Inc. 7 awardees, including Cummins Power Generation Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) CSOSA (Court Services and Offender Supervision Agency)	$37,752	<0.1%	Rank history: #30 in FY2022, #86 in FY2023, #96 in FY2024 and not on the FY2025 list; up 26 since FY2020.
90	AEG Group Inc. Top agencies Navy (Department of the Navy)	$37,516	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Allison Service Korea Co.,Ltd Top agencies Army (Department of the Army)	$37,199	<0.1%	Rank history: #55 in FY2022, #53 in FY2023, #70 in FY2024 and #57 in FY2025; up 56 since FY2020.
92	Process Pump & Seal, Inc. Top agencies Army (Department of the Army)	$35,382	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	See Neville Auto Supplies Inc. Top agencies VA (Department of Veterans Affairs)	$33,981	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	The Electric Motor Repair Company Top agencies DHS (Department of Homeland Security)	$32,200	<0.1%	Rank history: not on the FY2022 list, #94 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
95	Hydradyne Hydraulics Limited Liability Company (3353) Through Hydradyne, LLC Top agencies Army (Department of the Army)	$30,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Veteran Electrical Power Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$29,245	<0.1%	Rank history: #85 in FY2022, #95 in FY2023, #97 in FY2024 and #98 in FY2025; up 13 since FY2020.
97	Integrated Electrical Services, Inc. Through Magnetech Industrial Services, Inc. Top agencies Army (Department of the Army)	$27,896	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Robert E Ottoboni Top agencies Army (Department of the Army)	$27,100	<0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
99	Joint Force Contracting Incorporated Top agencies DHS (Department of Homeland Security)	$26,683	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	JBP LLC Top agencies USDA (Department of Agriculture)	$23,594	<0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.

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100 of 178 contractors listed here. See the rest on GovTribe.

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 $1.85 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. 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 PSC J028 contractors in FY2021?

1. RTX Corporation ($1.12B), 2. Rolls-Royce Military Aero Engines Ltd ($322M), 3. Lockheed Martin Corporation ($113M), 4. Standardaero Aviation Holdings, Inc. ($46.8M), 5. General Electric Company ($37.9M), 6. Government of Canada ($27.6M), 7. Rolls-Royce Corporation ($14.8M), 8. Air New Zealand Engineering Services ($11.7M), 9. Fairbanks Morse LLC ($10.4M), 10. Aero Turbine, Inc. ($9.55M).

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