Top 100 Contractors in NAICS 517410: Satellite Telecommunications, FY2021

Name: Top 100 Contractors in NAICS 517410: Satellite Telecommunications, FY2021
Creator: GovTribe

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

The top 10 won 74% of FY2021 NAICS 517410 contract dollars

Contract obligations: $1,125,192,280 Net of deobligations, by contracts coded NAICS 517410
Contractors: 201 Parent companies with an obligation
Largest contractor: Iridium Satellite LLC $210 million, 17.3% 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	Iridium Satellite LLC 4 awardees, including Iridium Government Services LLC Top agencies DISA (Defense Information Systems Agency)	$209,928,077	17.3%	Rank history: #4 in FY2022, #2 in FY2023, #13 in FY2024 and #9 in FY2025; up 12 since FY2020.
2	Leonardo S.p.A. 2 awardees, including Global Enterprise Solutions, Inc. Top agencies USSOCOM (United States Special Operations Command) Army (Department of the Army) DHS (Department of Homeland Security)	$137,094,992	11.3%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
3	Stratos Government Services, Inc. Through Inmarsat Government, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) Commerce (Department of Commerce)	$111,092,853	9.2%	Rank history: #3 in FY2022, #4 in FY2023, #14 in FY2024 and not on the FY2025 list; unchanged since FY2020.
4	Viasat Inc. 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$106,515,525	8.8%	Rank history: #2 in FY2022, #3 in FY2023, #5 in FY2024 and #5 in FY2025; down 2 since FY2020.
5	SES Government Solutions Inc. 2 awardees, including SES Space & Defense, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) USAGM (US Agency for Global Media)	$96,318,287	7.9%	Rank history: #5 in FY2022, #5 in FY2023, #9 in FY2024 and not on the FY2025 list; up 5 since FY2020.
6	CACI International Inc. Through Caci Nss, LLC Top agencies USAF (Department of the Air Force)	$77,613,888	6.4%	Rank history: #7 in FY2022, #7 in FY2023, #12 in FY2024 and not on the FY2025 list; down 1 since FY2020.
7	Artel LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOI (Department of the Interior)	$59,386,444	4.9%	Rank history: #9 in FY2022, #8 in FY2023, #8 in FY2024 and #8 in FY2025; up 9 since FY2020.
8	L3Harris Technologies, Inc. 4 awardees, including L3Harris Technologies Integrated Systems L.P. and L3 Technologies, Inc. Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$39,697,921	3.3%	Rank history: #6 in FY2022, #9 in FY2023, #6 in FY2024 and #7 in FY2025; down 1 since FY2020.
9	The Boeing Company 4 awardees, including Boeing Comsatcom Services, Inc. and Tapestry Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$36,818,274	3.0%	Rank history: #8 in FY2022, #6 in FY2023, #10 in FY2024 and #13 in FY2025; up 9 since FY2020.
10	Cogitan LLC Top agencies USAF (Department of the Air Force)	$24,188,448	2.0%	Rank history: #11 in FY2022, not on the FY2023 list, #16 in FY2024 and #12 in FY2025; down 1 since FY2020.
11	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force)	$23,200,000	1.9%	Rank history: #12 in FY2022, #15 in FY2023, #21 in FY2024 and #22 in FY2025; unchanged since FY2020.
12	Ritenet Corp. Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$22,873,077	1.9%	Rank history: #14 in FY2022, #10 in FY2023, #15 in FY2024 and #11 in FY2025; unchanged since FY2020.
13	Arctic Slope Regional Corporation 2 awardees, including Asrc Federal System Solutions LLC Top agencies USAF (Department of the Air Force)	$17,654,192	1.5%	Rank history: #15 in FY2022, #18 in FY2023, #18 in FY2024 and #16 in FY2025; up 17 since FY2020.
14	HP Enterprise Services LLC 3 awardees, including Peraton Government Communications Inc. Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) Army (Department of the Army)	$15,869,616	1.3%	Rank history: #18 in FY2022, #30 in FY2023, #51 in FY2024 and not on the FY2025 list; up 3 since FY2020.
15	Trace Systems Holdings Inc. Through Trace Systems, Inc. Top agencies DODEA (Department of Defense Education Activity) Peace Corps	$13,185,203	1.1%	Rank history: #21 in FY2022, #12 in FY2023, #32 in FY2024 and not on the FY2025 list; down 1 since FY2020.
16	Lockheed Martin Corporation Top agencies USAF (Department of the Air Force)	$11,597,977	1.0%	Rank history: #22 in FY2022, #13 in FY2023, #20 in FY2024 and #17 in FY2025; up 10 since FY2020.
17	Eutelsat America Corp. Top agencies USAGM (US Agency for Global Media)	$11,525,750	1.0%	Rank history: #52 in FY2022, #25 in FY2023, #30 in FY2024 and not on the FY2025 list; up 11 since FY2020.
18	Kratos Defense & Security Solutions, Inc. Through Kratos S1, Inc. Top agencies USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$11,523,509	1.0%	Rank history: #23 in FY2022, #19 in FY2023, #22 in FY2024 and #19 in FY2025; up 3 since FY2020.
19	Network Innovations Inc. 3 awardees, including Nic4 Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) DOI (Department of the Interior)	$9,149,026	0.8%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
20	Encompass Digital Media Inc. Top agencies DMA (Defense Media Activity)	$8,331,273	0.7%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
21	KVH Industries Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$6,070,420	0.5%	Rank history: #16 in FY2022, #17 in FY2023, #55 in FY2024 and #45 in FY2025; up 2 since FY2020.
22	Strategic Approach Solutions LLC Top agencies VA (Department of Veterans Affairs)	$5,805,013	0.5%	Rank history: #24 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
23	Comtech Telecommunications Corp. Through Comtech Mobile Datacom LLC Top agencies Army (Department of the Army)	$5,449,418	0.4%	Rank history: #31 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
24	Globecomm Systems Inc. 2 awardees, including Ultisat, Inc. Top agencies USAGM (US Agency for Global Media) Commerce (Department of Commerce) DOL (Department of Labor)	$4,600,654	0.4%	Rank history: #45 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
25	Space Systems/Loral LLC Through Vantor Inc. Top agencies Navy (Department of the Navy)	$4,270,000	0.4%	Rank history: #25 in FY2022, #26 in FY2023, #60 in FY2024 and not on the FY2025 list; up 58 since FY2020.
26	Satcom Direct Communications, Inc. 3 awardees, including Satcom Direct Government Communications, Inc. and Satcom Direct Government, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$4,155,855	0.3%	Rank history: #37 in FY2022, #35 in FY2023, #36 in FY2024 and not on the FY2025 list; down 7 since FY2020.
27	General Dynamics Corporation Through General Dynamics Mission Systems, Inc. Top agencies DISA (Defense Information Systems Agency)	$3,127,467	0.3%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
28	Goldbelt Frontier, LLC Top agencies OSD (Office of the Secretary of Defense)	$2,809,856	0.2%	Rank history: #38 in FY2022, #37 in FY2023, #47 in FY2024 and #37 in FY2025; up 12 since FY2020.
29	Knight Sky LLC Top agencies Commerce (Department of Commerce) DLA (Defense Logistics Agency) EPA (Environmental Protection Agency)	$2,786,317	0.2%	Rank history: #36 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
30	Visma Consulting A/S Through Twoday Danmark A / S Top agencies Commerce (Department of Commerce)	$2,679,320	0.2%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
31	Nana Regional Corporation Inc Through Rivertech LLC Top agencies Army (Department of the Army)	$2,412,474	0.2%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
32	Predasar Corp Top agencies USAF (Department of the Air Force)	$2,232,230	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Global Enterprise Solutions, Inc. Top agencies Army (Department of the Army) USAID (US Agency for International Development)	$2,126,325	0.2%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
34	Echostar Corporation Through Hughes Network Systems LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$1,973,834	0.2%	Rank history: #47 in FY2022, #36 in FY2023, #79 in FY2024 and not on the FY2025 list; down 2 since FY2020.
35	Orange Through Globecast America Incorporated Top agencies USAGM (US Agency for Global Media)	$1,933,322	0.2%	Rank history: #53 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
36	Media Broadcast GMBH Top agencies DMA (Defense Media Activity)	$1,683,600	0.1%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
37	NI Government Services Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$1,317,773	0.1%	Rank history: #44 in FY2022, #39 in FY2023, #56 in FY2024 and #53 in FY2025; up 9 since FY2020.
38	Intelsat General Communications LLC Top agencies USAGM (US Agency for Global Media) USAF (Department of the Air Force)	$1,224,914	0.1%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
39	Rivertech LLC Top agencies Army (Department of the Army)	$1,212,558	0.1%	Rank history: not on the FY2022–FY2023 lists, #37 in FY2024 and #36 in FY2025; new, not ranked in FY2020.
40	Telecom International LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,172,440	0.1%	Rank history: #41 in FY2022, #34 in FY2023, #33 in FY2024 and #29 in FY2025; up 2 since FY2020.
41	Teledyne Technologies Incorporated Through Teledyne Defense Electronics, LLC Top agencies Commerce (Department of Commerce)	$1,084,725	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Techno-Sciences LLC Top agencies Commerce (Department of Commerce)	$1,067,134	0.1%	Rank history: #27 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
43	Satcom Direct, Inc. Through Satcom Direct Communications, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOJ (Department of Justice)	$1,023,174	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Trace Systems, Inc. Top agencies DODEA (Department of Defense Education Activity)	$965,889	0.1%	Rank history: #78 in FY2022, not on the FY2023 list, #54 in FY2024 and #24 in FY2025; new, not ranked in FY2020.
45	RTX Corporation 3 awardees, including Arinc Incorporated and Raytheon Company Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation) USAF (Department of the Air Force)	$952,839	0.1%	Rank history: #19 in FY2022, #21 in FY2023, #25 in FY2024 and #18 in FY2025; up 18 since FY2020.
46	MDA Geospatial Services Inc Top agencies Commerce (Department of Commerce)	$800,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Caci Nss, LLC Top agencies USAF (Department of the Air Force)	$722,330	0.1%	Rank history: #13 in FY2022, #11 in FY2023, not on the FY2024 list and #31 in FY2025; down 39 since FY2020.
48	Somewear Labs, Inc. Top agencies DHS (Department of Homeland Security)	$700,000	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
49	Northrop Grumman Systems Corporation 2 awardees Top agencies USAF (Department of the Air Force)	$687,560	0.1%	Rank history: not on the FY2022–FY2023 lists, #41 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
50	Signal Mountain Networks, LLC Top agencies DOJ (Department of Justice) DOI (Department of the Interior)	$673,197	0.1%	Rank history: #59 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
51	Inmarsat Government, Inc. Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$671,838	0.1%	Rank history: not on the FY2022–FY2023 lists, #3 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
52	Space Exploration Technologies Corp. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture) Navy (Department of the Navy)	$583,809	<0.1%	Rank history: #30 in FY2022, #14 in FY2023, #1 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
53	Alexander/Ryan Marine & Safety Co. Through NAL Research Corp Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) Commerce (Department of Commerce)	$550,511	<0.1%	Rank history: #61 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
54	Honeywell International Inc. 2 awardees, including Ems Technologies Canada, Ltd Top agencies Commerce (Department of Commerce) Navy (Department of the Navy)	$545,171	<0.1%	Rank history: #85 in FY2022, #64 in FY2023, #99 in FY2024 and not on the FY2025 list; up 12 since FY2020.
55	Telesat Canada Top agencies USAF (Department of the Air Force)	$530,425	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	University of Texas System Through University of Texas At Austin Top agencies NASA (National Aeronautics and Space Administration)	$515,000	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
57	Bentley-Walker Ltd Top agencies USSOCOM (United States Special Operations Command)	$486,540	<0.1%	Rank history: #76 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
58	Orbcomm, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$475,340	<0.1%	Rank history: #54 in FY2022, #45 in FY2023, #66 in FY2024 and #41 in FY2025; up 9 since FY2020.
59	Arqiva Limited Top agencies USAGM (US Agency for Global Media)	$470,143	<0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
60	Phase II Staffing and Contracting, LLC Top agencies Army (Department of the Army)	$441,504	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	University of Hawaii Top agencies NASA (National Aeronautics and Space Administration)	$360,000	<0.1%	Rank history: not on the FY2022–FY2023 lists, #61 in FY2024 and #40 in FY2025; up 63 since FY2020.
62	University of Hawaii Systems Through University of Hawaii Top agencies NASA (National Aeronautics and Space Administration)	$340,000	<0.1%	Rank history: #48 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
63	Sound & Cellular, Inc. Top agencies USDA (Department of Agriculture)	$333,245	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
64	Globafone Inc. Top agencies DOJ (Department of Justice) Commerce (Department of Commerce) DODEA (Department of Defense Education Activity)	$329,823	<0.1%	Rank history: #60 in FY2022, #51 in FY2023, #75 in FY2024 and #67 in FY2025; up 16 since FY2020.
65	Corp Ten International Top agencies Navy (Department of the Navy)	$328,155	<0.1%	Rank history: #63 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
66	Babcock Media Services Limited Through Encompass Digital Media Services Limited Top agencies USAGM (US Agency for Global Media)	$314,304	<0.1%	Rank history: #68 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
67	Globalstar, Inc. 2 awardees, including Spot LLC and Globalstar USA LLC Top agencies USDA (Department of Agriculture) DOJ (Department of Justice) DOI (Department of the Interior)	$268,501	<0.1%	Rank history: #72 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
68	Us21 Inc. Top agencies USAF (Department of the Air Force) DOS (Department of State)	$241,430	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
69	Castor Networks Fixed Services B.V. Top agencies DOS (Department of State)	$230,400	<0.1%	Rank history: #50 in FY2022, #38 in FY2023, #69 in FY2024 and not on the FY2025 list; up 3 since FY2020.
70	Orolia Government Systems, Inc. Top agencies Army (Department of the Army)	$225,339	<0.1%	Rank history: #34 in FY2022, #20 in FY2023 and not on the FY2024–FY2025 lists; down 31 since FY2020.
71	Comsoft GMBH Top agencies DOT (Department of Transportation)	$221,633	<0.1%	Rank history: #75 in FY2022, #65 in FY2023, #85 in FY2024 and #83 in FY2025; up 4 since FY2020.
72	Xtar LLC Top agencies Navy (Department of the Navy)	$220,028	<0.1%	Rank history: #57 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; up 42 since FY2020.
73	Strohman Enterprise Inc. Top agencies DOI (Department of the Interior) Commerce (Department of Commerce) USDA (Department of Agriculture)	$211,723	<0.1%	Rank history: #69 in FY2022, #56 in FY2023, #90 in FY2024 and #80 in FY2025; up 8 since FY2020.
74	International Satellite Services, Inc. Top agencies DOI (Department of the Interior) DHS (Department of Homeland Security)	$201,364	<0.1%	Rank history: not on the FY2022–FY2024 lists and #100 in FY2025; down 12 since FY2020.
75	Bringcom Incorporated Top agencies USAF (Department of the Air Force)	$191,822	<0.1%	Rank history: #49 in FY2022, #44 in FY2023, #63 in FY2024 and not on the FY2025 list; down 34 since FY2020.
76	At&T Inc. 4 awardees, including Alascom, Inc., Att Mobility LLC and Directv, LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) DOJ (Department of Justice)	$171,073	<0.1%	Rank history: not on the FY2022 list, #75 in FY2023 and not on the FY2024–FY2025 lists; up 43 since FY2020.
77	Burton Enterprises, L.L.C. Top agencies Navy (Department of the Navy) Army (Department of the Army) DOI (Department of the Interior)	$168,554	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
78	Onevue Consulting LLC Top agencies VA (Department of Veterans Affairs)	$148,249	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Target Media Group Limited Top agencies USAID (US Agency for International Development)	$133,020	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Quadrigae Global Enterprises, Inc. Top agencies DOT (Department of Transportation) EPA (Environmental Protection Agency)	$131,424	<0.1%	Rank history: #86 in FY2022, #84 in FY2023, #91 in FY2024 and #96 in FY2025; down 4 since FY2020.
81	Sure (Diego Garcia) Limited Top agencies DMA (Defense Media Activity)	$126,000	<0.1%	Rank history: #82 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
82	Cavalier Telephone L.L.C. Through Windstream Nuvox, LLC Top agencies Army (Department of the Army)	$125,250	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
83	Businesscom CZ Spol. S R.o. Top agencies USSOCOM (United States Special Operations Command) DOS (Department of State)	$124,053	<0.1%	Rank history: #58 in FY2022, #58 in FY2023, #86 in FY2024 and not on the FY2025 list; down 4 since FY2020.
84	United Nations Through Union Internationale DES Telecommunications (Uit) Top agencies NASA (National Aeronautics and Space Administration)	$120,000	<0.1%	Rank history: not on the FY2022 list, #86 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
85	Danaher Corporation Through OTT Hydromet Corp Top agencies USDA (Department of Agriculture)	$113,232	<0.1%	Rank history: not on the FY2022–FY2023 lists, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
86	IP Access International, LLC Top agencies Army (Department of the Army)	$110,236	<0.1%	Rank history: #80 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2020.
87	DBN Holding, Inc. Top agencies USAF (Department of the Air Force)	$104,160	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
88	Norsk Romsenter Through Direktoratet for Romvirksomhet Top agencies DOI (Department of the Interior)	$101,990	<0.1%	Rank history: #74 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; down 28 since FY2020.
89	Telestar Systems, Inc. Top agencies VA (Department of Veterans Affairs)	$101,456	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
90	Trustcomm Inc. Through Oneweb Technologies Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOJ (Department of Justice)	$101,097	<0.1%	Rank history: #88 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; down 35 since FY2020.
91	Silent Partner Services LLC Top agencies DOJ (Department of Justice)	$96,950	<0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
92	Retirementhometv Corporation Top agencies VA (Department of Veterans Affairs)	$94,404	<0.1%	Rank history: #94 in FY2022, #70 in FY2023, not on the FY2024 list and #78 in FY2025; up 38 since FY2020.
93	Fedcon-1, LLC Top agencies VA (Department of Veterans Affairs)	$86,656	<0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
94	Commercial Satellite Sales LLC Top agencies VA (Department of Veterans Affairs)	$84,779	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Satcom Services Corporation Top agencies DIA (Defense Intelligence Agency) Commerce (Department of Commerce)	$82,529	<0.1%	Rank history: not on the FY2022 list, #72 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
96	Mackay Communications, Inc. 2 awardees Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$76,889	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
97	Amergint Technologies, Inc. Top agencies Commerce (Department of Commerce)	$76,775	<0.1%	Rank history: #79 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
98	Newsat North America, LLC Top agencies DHS (Department of Homeland Security)	$75,272	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
99	Allen Holdings, Inc. Top agencies DMA (Defense Media Activity)	$74,664	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Entinu Media LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$72,035	<0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.

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100 of 201 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 $1.21 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 517410 contractors in FY2021?

1. Iridium Satellite LLC ($210M), 2. Leonardo S.p.A. ($137M), 3. Stratos Government Services, Inc. ($111M), 4. Viasat Inc. ($107M), 5. SES Government Solutions Inc. ($96.3M), 6. CACI International Inc. ($77.6M), 7. Artel LLC ($59.4M), 8. L3Harris Technologies, Inc. ($39.7M), 9. The Boeing Company ($36.8M), 10. Cogitan LLC ($24.2M).

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