Top 100 Contractors in NAICS 4881: Support Activities for Air Transportation, FY2021

Name: Top 100 Contractors in NAICS 4881: Support Activities for Air Transportation, FY2021
Creator: GovTribe

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

The top 10 won 62% of FY2021 NAICS 4881 contract dollars

Contract obligations: $7,361,453,701 Net of deobligations, by contracts coded NAICS 4881 or a code under it
Contractors: 923 Parent companies with an obligation
Largest contractor: Amentum Services, Inc. $826 million, 10.4% 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	Amentum Services, Inc. 2 awardees, including Dyncorp International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$826,449,466	10.4%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and not on the FY2025 list; up 55 since FY2020.
2	M1 Support Services, L.P. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$783,684,112	9.9%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #3 in FY2025; unchanged since FY2020.
3	Vertex Aerospace LLC 4 awardees, including V2X Aerospace LLC and Crestview Aerospace LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DCMA (Defense Contract Management Agency)	$748,361,437	9.4%	Rank history: #2 in FY2022, #2 in FY2023, #20 in FY2024 and not on the FY2025 list; up 1 since FY2020.
4	RTX Corporation 25 awardees, including Rockwell Collins, Inc., Goodrich Corporation and Simmonds Precision Products Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$566,211,256	7.1%	Rank history: #6 in FY2022, #5 in FY2023, #4 in FY2024 and #4 in FY2025; down 1 since FY2020.
5	Remington Arms Company LLC Through Dyncorp International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DCMA (Defense Contract Management Agency)	$460,521,473	5.8%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
6	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation)	$411,886,762	5.2%	Rank history: #33 in FY2022, #27 in FY2023, #23 in FY2024 and #18 in FY2025; unchanged since FY2020.
7	Northrop Grumman Corporation 13 awardees, including Northrop Grumman Systems Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$349,000,487	4.4%	Rank history: #4 in FY2022, #4 in FY2023, #10 in FY2024 and #10 in FY2025; down 2 since FY2020.
8	Aarcorp 5 awardees, including AAR Government Services, Inc., AAR Aircraft Services, Inc. and AAR Allen Services, Inc. Top agencies DOS (Department of State) DOE (Department of Energy) USAF (Department of the Air Force)	$297,659,535	3.8%	Rank history: #8 in FY2022, #8 in FY2023, #19 in FY2024 and not on the FY2025 list; up 3 since FY2020.
9	The Boeing Company 13 awardees, including Boeing Sikorsky Aircraft Support, LLC, Boeing Aerospace Operations, Inc. and Tapestry Solutions, Inc. Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$274,985,631	3.5%	Rank history: #5 in FY2022, #6 in FY2023, #6 in FY2024 and #6 in FY2025; up 1 since FY2020.
10	IAP Global Services LLC 2 awardees, including Jpats Logistics Services, LLC and IAP Worldwide Services, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$237,548,871	3.0%	Rank history: #9 in FY2022, #9 in FY2023, #11 in FY2024 and not on the FY2025 list; down 3 since FY2020.
11	Airbus Americas Inc. 4 awardees, including Airbus US Space & Defense Inc., Airbus Helicopters, Inc. and Airbus DS Military Aircraft, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$227,608,571	2.9%	Rank history: #7 in FY2022, #7 in FY2023, #91 in FY2024 and not on the FY2025 list; down 3 since FY2020.
12	PAE Government Services Inc. 2 awardees, including PAE Aviation and Technical Services LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) USAF (Department of the Air Force)	$217,793,837	2.7%	Rank history: #12 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
13	Calista Corp 3 awardees, including Yulista Support Services LLC, Yulista Tactical Services LLC and Y-Tech Services, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$132,199,967	1.7%	Rank history: #10 in FY2022, #11 in FY2023, #42 in FY2024 and not on the FY2025 list; up 5 since FY2020.
14	Lockheed Martin Corporation 7 awardees, including Sikorsky Aircraft Corporation and Derco Aerospace, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOJ (Department of Justice)	$107,194,576	1.4%	Rank history: #11 in FY2022, #10 in FY2023, #13 in FY2024 and #11 in FY2025; up 47 since FY2020.
15	Sierra Nevada Company, LLC 2 awardees Top agencies USAF (Department of the Air Force)	$103,556,085	1.3%	Rank history: #14 in FY2022, #14 in FY2023, #25 in FY2024 and #23 in FY2025; up 4 since FY2020.
16	V2X, Inc. Through V2X Aerospace LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DCMA (Defense Contract Management Agency)	$91,263,427	1.2%	Rank history: #94 in FY2022, not on the FY2023 list, #2 in FY2024 and #2 in FY2025; down 7 since FY2020.
17	General Atomic Technologies Corporation Through General Atomics Aeronautical Systems, Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$87,767,483	1.1%	Rank history: #13 in FY2022, #12 in FY2023, #45 in FY2024 and not on the FY2025 list; up 12 since FY2020.
18	Tyonek Native Corporatio 3 awardees, including Tyonek Services Overhaul Facility-Stennis, LLC and Tyonek Global Services LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$85,440,650	1.1%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
19	Kay and Associates, Inc. Top agencies Navy (Department of the Navy)	$83,742,932	1.1%	Rank history: #16 in FY2022, #18 in FY2023, #37 in FY2024 and #13 in FY2025; up 4 since FY2020.
20	Pinnacle Solutions, LLC Top agencies Army (Department of the Army)	$80,152,281	1.0%	Rank history: not on the FY2022–FY2025 lists; up 203 since FY2020.
21	Robinson Aviation (Rva), Inc. Top agencies DOT (Department of Transportation)	$65,742,590	0.8%	Rank history: #17 in FY2022, #16 in FY2023, #17 in FY2024 and #14 in FY2025; unchanged since FY2020.
22	S & K Aerospace, LLC Top agencies USAF (Department of the Air Force)	$65,405,706	0.8%	Rank history: not on the FY2022–FY2024 lists and #70 in FY2025; down 5 since FY2020.
23	Patriarch Partners LLC Through MD Helicopters Inc. Top agencies Army (Department of the Army)	$62,837,618	0.8%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
24	Midwest Air Traffic Control Service Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy)	$55,052,546	0.7%	Rank history: #19 in FY2022, #17 in FY2023, #21 in FY2024 and #17 in FY2025; down 2 since FY2020.
25	Airborne Tactical Advantage Co LLC Top agencies Navy (Department of the Navy)	$51,854,314	0.7%	Rank history: #15 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; up 118 since FY2020.
26	Avmac LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$51,527,382	0.6%	Rank history: #18 in FY2022, not on the FY2023–FY2024 lists and #52 in FY2025; down 1 since FY2020.
27	Nana Regional Corporation Inc 3 awardees, including Akima Logistics Services LLC, Lockwood Hills Federal LLC and Akima Support Operations, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$49,171,315	0.6%	Rank history: #20 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
28	Textron Inc. 6 awardees, including Textron Systems Corporation, Textron Aviation Inc. and Able Aerospace Services, Inc. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture) DHS (Department of Homeland Security)	$44,416,955	0.6%	Rank history: #40 in FY2022, #31 in FY2023, #18 in FY2024 and #16 in FY2025; down 4 since FY2020.
29	Serco North America (Holdings) Inc Through Serco Inc. Top agencies DOT (Department of Transportation)	$35,311,322	0.4%	Rank history: #22 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
30	L3Harris Technologies, Inc. 9 awardees, including L3Harris Technologies Integrated Systems L.P., Wescam Inc. and CAE USA Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$34,937,045	0.4%	Rank history: #36 in FY2022, #54 in FY2023, #39 in FY2024 and #27 in FY2025; up 12 since FY2020.
31	Omega Aerial Refueling Services, Inc. Top agencies Navy (Department of the Navy)	$32,813,100	0.4%	Rank history: #28 in FY2022, #22 in FY2023, #29 in FY2024 and #22 in FY2025; down 1 since FY2020.
32	VT Milcom Inc. Through National Technologies Associates, Inc. Top agencies Navy (Department of the Navy)	$23,704,464	0.3%	Rank history: #39 in FY2022, #40 in FY2023, #61 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
33	Korean Air Lines Co.,Ltd. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DCMA (Defense Contract Management Agency)	$23,510,313	0.3%	Rank history: #24 in FY2022, #29 in FY2023, #26 in FY2024 and #32 in FY2025; up 15 since FY2020.
34	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$21,681,283	0.3%	Rank history: #30 in FY2022, #36 in FY2023, #54 in FY2024 and not on the FY2025 list; up 11 since FY2020.
35	SAFRAN 9 awardees, including Safran Helicopter Engines Usa, Inc., Safran Electronics & Defense, Avionics Usa, LLC and Safran Aerosystems Services Americas LLC Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation) DLA (Defense Logistics Agency)	$18,860,110	0.2%	Rank history: #35 in FY2022, #38 in FY2023, #41 in FY2024 and #35 in FY2025; unchanged since FY2020.
36	Dyncorp International LLC Top agencies Navy (Department of the Navy) DCMA (Defense Contract Management Agency)	$17,832,897	0.2%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
37	Spartan Iraq LLC Top agencies USAF (Department of the Air Force)	$17,705,796	0.2%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
38	Rolls-Royce Military Aero Engines Ltd 2 awardees, including Rolls-Royce Corporation and Rolls-Royce Deutschland Ltd & Co KG Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) DOT (Department of Transportation)	$17,148,360	0.2%	Rank history: #54 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
39	PAE Aviation and Technical Services LLC Top agencies DHS (Department of Homeland Security)	$15,577,794	0.2%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
40	Louis Berger U.S. Inc. Through VGS Aircraft Services, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$15,536,106	0.2%	Rank history: #31 in FY2022, #41 in FY2023, #47 in FY2024 and not on the FY2025 list; up 45 since FY2020.
41	Arctic Slope Regional Corporation Through Primus Solutions, LLC Top agencies Army (Department of the Army)	$14,369,958	0.2%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
42	Nippi Corporation Top agencies Navy (Department of the Navy)	$13,967,170	0.2%	Rank history: #34 in FY2022, #42 in FY2023, #64 in FY2024 and not on the FY2025 list; up 11 since FY2020.
43	PKL Services, Inc. Top agencies USAF (Department of the Air Force)	$12,773,600	0.2%	Rank history: #26 in FY2022, #34 in FY2023, #38 in FY2024 and #37 in FY2025; up 4 since FY2020.
44	Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force)	$10,959,435	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Triad Logistics Services Corporation Top agencies USAF (Department of the Air Force)	$10,243,775	0.1%	Rank history: #44 in FY2022, #44 in FY2023, #55 in FY2024 and #45 in FY2025; up 9 since FY2020.
46	Government of Canada Through Canadian Commercial Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$9,037,096	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Calspan Corporation Top agencies USAF (Department of the Air Force)	$8,605,349	0.1%	Rank history: #49 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; up 115 since FY2020.
48	Algese S.R.L. Top agencies USAF (Department of the Air Force)	$8,190,509	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
49	Subaru Corporation Top agencies Navy (Department of the Navy) DCMA (Defense Contract Management Agency)	$7,583,882	0.1%	Rank history: #42 in FY2022, #46 in FY2023, #57 in FY2024 and #79 in FY2025; up 58 since FY2020.
50	Aero Precision & Repair Overhaul Company, Inc. Top agencies DHS (Department of Homeland Security)	$7,541,658	0.1%	Rank history: #41 in FY2022, #66 in FY2023, #71 in FY2024 and #49 in FY2025; up 15 since FY2020.
51	Marshall of Cambridge Aerospace Limited Top agencies Navy (Department of the Navy)	$7,444,614	0.1%	Rank history: #29 in FY2022, #45 in FY2023, #34 in FY2024 and #34 in FY2025; up 141 since FY2020.
52	Jahn Corp Top agencies Navy (Department of the Navy)	$7,373,756	0.1%	Rank history: #53 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
53	Alisud - Gesac Handling - Servisair 2 - Scarl Through Algese S.R.L. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$7,254,800	0.1%	Rank history: #37 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 45 since FY2020.
54	Maccs-Easi JV 1 LLC Top agencies USAF (Department of the Air Force)	$6,952,210	0.1%	Rank history: #48 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
55	Draken International, LLC Top agencies Navy (Department of the Navy)	$6,784,425	0.1%	Rank history: #46 in FY2022, #50 in FY2023, #58 in FY2024 and #56 in FY2025; up 15 since FY2020.
56	Battlespace, Inc. Top agencies USAF (Department of the Air Force)	$6,426,087	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
57	C2G, Ltd Co. Top agencies USAF (Department of the Air Force)	$6,332,878	0.1%	Rank history: #57 in FY2022, #52 in FY2023, #70 in FY2024 and #54 in FY2025; up 18 since FY2020.
58	Empire Aircraft Services Inc. Top agencies USAF (Department of the Air Force)	$6,199,751	0.1%	Rank history: #70 in FY2022, #86 in FY2023, not on the FY2024 list and #96 in FY2025; up 1 since FY2020.
59	Aero TECH Service Associates, Inc. Top agencies USAF (Department of the Air Force)	$6,129,339	0.1%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
60	Skyquest Aviation LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) USAF (Department of the Air Force)	$5,989,853	0.1%	Rank history: #60 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
61	Unmanned Systems Incorporated Top agencies USAF (Department of the Air Force)	$5,652,182	0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
62	Boeing Aerospace Operations, Inc. Top agencies USAF (Department of the Air Force)	$5,642,052	0.1%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; up 18 since FY2020.
63	System Dynamics International Incorporated Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$4,957,795	0.1%	Rank history: #55 in FY2022, #56 in FY2023, #69 in FY2024 and #100 in FY2025; up 20 since FY2020.
64	Lakota Solutions LLC Top agencies USAF (Department of the Air Force)	$4,919,648	0.1%	Rank history: #66 in FY2022, #57 in FY2023, #73 in FY2024 and #72 in FY2025; up 14 since FY2020.
65	Exodyne, Inc. Through Dynamic Science, Inc. Top agencies USAF (Department of the Air Force)	$4,629,569	0.1%	Rank history: #61 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
66	Aaski Technology Inc. 2 awardees, including Remotely Piloted Solutions, L.L.C. and Mag DS Corp Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$4,566,476	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Logmet LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,512,427	0.1%	Rank history: #56 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
68	Zodiac Aerospace Through American Fuel Cell and Coated Fabrics Company, LLC Top agencies DLA (Defense Logistics Agency)	$4,362,135	0.1%	Rank history: #92 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
69	General Electric Company 5 awardees, including GE Aviation Systems LLC Top agencies DHS (Department of Homeland Security)	$3,990,024	0.1%	Rank history: #82 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
70	Tyonek Services Overhaul Facility - Stennis, LLC Top agencies Army (Department of the Army)	$3,775,399	<0.1%	Rank history: #25 in FY2022, #15 in FY2023, #30 in FY2024 and #25 in FY2025; up 24 since FY2020.
71	Bahrain Airport Services Company (Bas) B.s.c Closed Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$3,736,370	<0.1%	Rank history: #69 in FY2022, #67 in FY2023, not on the FY2024 list and #71 in FY2025; up 19 since FY2020.
72	Advanced Technology Systems Company, Inc. (OF Virginia) Top agencies Army (Department of the Army)	$3,728,664	<0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
73	Vectrus Systems LLC Top agencies Army (Department of the Army)	$3,647,068	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Qinetiq Group PLC Through Qinetiq Limited Top agencies USAF (Department of the Air Force)	$3,589,900	<0.1%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; up 120 since FY2020.
75	Black Hall Aerospace, Inc. Top agencies Army (Department of the Army)	$3,537,217	<0.1%	Rank history: #58 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
76	Yulista Tactical Services LLC Top agencies NASA (National Aeronautics and Space Administration)	$3,481,810	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Strategic Technology Institute Inc. Top agencies DOT (Department of Transportation)	$3,464,200	<0.1%	Rank history: #71 in FY2022, #75 in FY2023, #79 in FY2024 and #74 in FY2025; up 29 since FY2020.
78	T Square Logistics Services Corporation Top agencies USAF (Department of the Air Force)	$3,444,976	<0.1%	Rank history: #80 in FY2022, #78 in FY2023, #81 in FY2024 and #82 in FY2025; up 30 since FY2020.
79	Intific Inc Through Cubic Defense Applications, Inc. Top agencies USAF (Department of the Air Force)	$3,444,128	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
80	Airbus US Space & Defense Inc. Top agencies Army (Department of the Army)	$3,400,226	<0.1%	Rank history: #67 in FY2022, not on the FY2023 list, #12 in FY2024 and #8 in FY2025; up 15 since FY2020.
81	Sunshine Aero Industries, Incorporated Top agencies USAF (Department of the Air Force)	$3,305,712	<0.1%	Rank history: not on the FY2022–FY2023 lists, #89 in FY2024 and #97 in FY2025; new, not ranked in FY2020.
82	Envision Industries, Inc. Through Envision Xpress Inc. Top agencies DLA (Defense Logistics Agency)	$3,294,955	<0.1%	Rank history: #52 in FY2022, #25 in FY2023, #44 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
83	Faith Enterprises Inc Through King Aerospace, Inc. Top agencies DOE (Department of Energy)	$3,280,868	<0.1%	Rank history: #51 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
84	Aery Aviation, LLC Top agencies DHS (Department of Homeland Security)	$3,236,048	<0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 18 since FY2020.
85	AAR Government Services, Inc. Top agencies DOS (Department of State) Navy (Department of the Navy)	$3,136,635	<0.1%	Rank history: not on the FY2022–FY2023 lists, #15 in FY2024 and #9 in FY2025; down 41 since FY2020.
86	The Chenega Corporation 2 awardees, including Chenega Applied Solutions, LLC and Chenega Healthcare Services LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$2,968,766	<0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
87	Cherokee Nation Mission Solutions, L.L.C. Top agencies DOS (Department of State)	$2,965,571	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 24 since FY2020.
88	Leonardo S.p.A. 3 awardees, including Leonardo Electronics US Inc. and Leonardo UK Ltd Top agencies DHS (Department of Homeland Security)	$2,944,912	<0.1%	Rank history: not on the FY2022 list, #71 in FY2023, #62 in FY2024 and #93 in FY2025; down 6 since FY2020.
89	Tanadgusix Corporation Through Bering Sea Environmental LLC Top agencies USAF (Department of the Air Force)	$2,780,667	<0.1%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; up 34 since FY2020.
90	J.f. Taylor, Inc. Top agencies USAF (Department of the Air Force)	$2,755,925	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	IEM International, Inc. Top agencies DHS (Department of Homeland Security)	$2,744,358	<0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 35 since FY2020.
92	General Dynamics Corporation 3 awardees, including Gulfstream Aerospace Corporation and General Dynamics Information Technology, Inc. Top agencies DHS (Department of Homeland Security) Commerce (Department of Commerce)	$2,702,319	<0.1%	Rank history: not on the FY2022–FY2023 lists, #80 in FY2024 and #12 in FY2025; up 11 since FY2020.
93	Honeywell International Inc. 9 awardees Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) DOT (Department of Transportation)	$2,682,516	<0.1%	Rank history: #75 in FY2022 and not on the FY2023–FY2025 lists; up 67 since FY2020.
94	Vision Information Technology Consultants, LLC Top agencies USAF (Department of the Air Force)	$2,636,704	<0.1%	Rank history: #73 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
95	Precision Aerospace Corporation Through Pacific Propeller International LLC Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) DHS (Department of Homeland Security)	$2,535,551	<0.1%	Rank history: not on the FY2022 list, #97 in FY2023 and not on the FY2024–FY2025 lists; up 43 since FY2020.
96	Trax International Corporation Top agencies USAF (Department of the Air Force)	$2,534,758	<0.1%	Rank history: #84 in FY2022, #89 in FY2023, not on the FY2024 list and #98 in FY2025; up 8 since FY2020.
97	Techwise LLC Top agencies Army (Department of the Army)	$2,505,901	<0.1%	Rank history: #95 in FY2022, not on the FY2023 list, #87 in FY2024 and not on the FY2025 list; up 12 since FY2020.
98	Avian, LLC Top agencies Navy (Department of the Navy)	$2,433,010	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
99	Tyonek Global Services LLC Top agencies Navy (Department of the Navy)	$2,378,936	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
100	Cubic Digital Intelligence Inc. Through Cubic Defense Applications, Inc. Top agencies USAF (Department of the Air Force)	$2,072,216	<0.1%	Rank history: #78 in FY2022, #82 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.

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100 of 923 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 4881

Code	Net obligations	Largest contractor
48819 Other Support Activities for Air Transportation	$6,963,742,470	Amentum Services, Inc.
48811 Airport Operations	$397,711,231	Leidos Holdings, 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 $7.93 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 NAICS 4881 contractors in FY2021?

1. Amentum Services, Inc. ($826M), 2. M1 Support Services, L.P. ($784M), 3. Vertex Aerospace LLC ($748M), 4. RTX Corporation ($566M), 5. Remington Arms Company LLC ($461M), 6. Leidos Holdings, Inc. ($412M), 7. Northrop Grumman Corporation ($349M), 8. Aarcorp ($298M), 9. The Boeing Company ($275M), 10. IAP Global Services LLC ($238M).

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