Top 100 Contractors in PSC DF01: IT and Telecom – IT Management Support Services (Labor), FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Accenture Federal Services LLC Top agencies HHS (Department of Health and Human Services) DOE (Department of Energy) DLA (Defense Logistics Agency)	$175,497,986	14.9%	Rank history: #2 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
2	Science Applications International Corporation 2 awardees Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$56,978,364	4.8%	Rank history: #6 in FY2022, #7 in FY2023, #8 in FY2024 and #7 in FY2025; new, not ranked in FY2020.
3	Deloitte LLP 2 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top agencies USDA (Department of Agriculture) Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$48,999,731	4.2%	Rank history: #4 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
4	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top agencies HHS (Department of Health and Human Services) Army (Department of the Army) Treasury (Department of the Treasury)	$36,683,104	3.1%	Rank history: #13 in FY2022, #20 in FY2023, #30 in FY2024 and #47 in FY2025; new, not ranked in FY2020.
5	Criterion Systems, L.L.C. Top agencies DOE (Department of Energy) USDA (Department of Agriculture)	$34,191,114	2.9%	Rank history: #10 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
6	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DOL (Department of Labor)	$24,875,533	2.1%	Rank history: #3 in FY2022, #2 in FY2023, #3 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
7	CACI International Inc. 3 awardees, including Caci, Inc. - Federal, Caci Enterprise Solutions, LLC and Caci Nss, LLC Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency) DISA (Defense Information Systems Agency)	$22,152,497	1.9%	Rank history: #11 in FY2022, #3 in FY2023, #6 in FY2024 and #5 in FY2025; new, not ranked in FY2020.
8	Dlh, LLC Top agencies HHS (Department of Health and Human Services)	$21,501,519	1.8%	Rank history: #12 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
9	Bellese Technologies, LLC Top agencies HHS (Department of Health and Human Services)	$20,882,659	1.8%	Rank history: #14 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
10	Advanced Technology Systems Inc. Through Salient Crgt, Inc. Top agencies DHS (Department of Homeland Security)	$16,890,976	1.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	HP Enterprise Services LLC 2 awardees, including Peraton Inc. Top agencies DOS (Department of State) DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services)	$15,971,022	1.4%	Rank history: #7 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
12	Semanticbits LLC Top agencies HHS (Department of Health and Human Services)	$15,799,149	1.3%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
13	On Assignment, Inc. Through ECS Federal, LLC Top agencies DHS (Department of Homeland Security) Treasury (Department of the Treasury)	$13,962,988	1.2%	Rank history: #38 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
14	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$13,053,109	1.1%	Rank history: #15 in FY2022, #10 in FY2023, #18 in FY2024 and #21 in FY2025; new, not ranked in FY2020.
15	Nimbus Consulting LLC Top agencies HHS (Department of Health and Human Services)	$12,521,850	1.1%	Rank history: not on the FY2022 list, #42 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
16	Thundercat Technology, LLC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$12,003,094	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	Alliance Data Systems Corporation Through Epsilon Inc. Top agencies DOE (Department of Energy)	$11,624,872	1.0%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc., 1901 Group, LLC and Leidos Digital Solutions Inc. Top agencies HHS (Department of Health and Human Services) SBA (Small Business Administration) Commerce (Department of Commerce)	$11,376,032	1.0%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #2 in FY2025; new, not ranked in FY2020.
19	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services)	$10,364,371	0.9%	Rank history: #45 in FY2022, #78 in FY2023, #93 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
20	Accuity Asset Verification Services Inc. Top agencies SSA (Social Security Administration)	$10,211,755	0.9%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
21	Scientific Research Corporation Top agencies Navy (Department of the Navy)	$10,154,760	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	Asrc Federal Data Networx, LLC Top agencies USDA (Department of Agriculture)	$10,130,960	0.9%	Rank history: #36 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
23	Credence Management Solutions Limited Liability Company Top agencies DLA (Defense Logistics Agency)	$9,807,464	0.8%	Rank history: #18 in FY2022, #18 in FY2023, #22 in FY2024 and #17 in FY2025; new, not ranked in FY2020.
24	PBG Consulting, LLC Top agencies OPM (Office of Personnel Management)	$9,802,167	0.8%	Rank history: #34 in FY2022, #48 in FY2023, #35 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
25	Softrams LLC Top agencies HHS (Department of Health and Human Services)	$9,589,555	0.8%	Rank history: #40 in FY2022, #56 in FY2023, #91 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
26	Idera, Inc. Through Precise Software Solutions, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$8,725,195	0.7%	Rank history: #25 in FY2022, #32 in FY2023, #27 in FY2024 and #33 in FY2025; new, not ranked in FY2020.
27	Innovative Management Concepts, Inc. Top agencies USAF (Department of the Air Force)	$8,582,141	0.7%	Rank history: #64 in FY2022, #43 in FY2023, #87 in FY2024 and #79 in FY2025; new, not ranked in FY2020.
28	SHR Consulting Group LLC Top agencies DHS (Department of Homeland Security)	$8,281,764	0.7%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
29	Dignari, LLC Top agencies DHS (Department of Homeland Security)	$7,708,868	0.7%	Rank history: #73 in FY2022, #19 in FY2023, #12 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
30	Lintech Global Inc. Top agencies DODIG (Department of Defense Inspector General)	$7,376,271	0.6%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
31	Halvik LLC Top agencies Army (Department of the Army) DOT (Department of Transportation)	$7,370,564	0.6%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
32	ACE Info Solutions LLC Through Guidehouse Digital LLC Top agencies USDA (Department of Agriculture)	$7,337,863	0.6%	Rank history: #81 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
33	Microsoft Corporation Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy) Smithsonian (Smithsonian Institution)	$7,314,182	0.6%	Rank history: #51 in FY2022, #62 in FY2023, not on the FY2024 list and #32 in FY2025; new, not ranked in FY2020.
34	Flexion Inc. Top agencies HHS (Department of Health and Human Services) GSA (General Services Administration)	$7,302,131	0.6%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
35	Tyler Federal, LLC Top agencies DOS (Department of State)	$7,285,536	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	The Tatitlek Corporation Through Tatitlek Federal Services LLC Top agencies Treasury (Department of the Treasury)	$7,019,597	0.6%	Rank history: #33 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
37	Blue TECH Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) DOJ (Department of Justice)	$6,945,725	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Koniag, Inc. 4 awardees, including Tuknik Government Services LLC, Arlluk Technology Solutions LLC and Eagle Harbor Solutions LLC Top agencies USDA (Department of Agriculture) Army (Department of the Army) DOS (Department of State)	$6,684,934	0.6%	Rank history: #59 in FY2022, #91 in FY2023, not on the FY2024 list and #62 in FY2025; new, not ranked in FY2020.
39	LCG Systems LLC Top agencies HHS (Department of Health and Human Services)	$6,676,795	0.6%	Rank history: #69 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
40	Favor Techconsulting, LLC Top agencies DHS (Department of Homeland Security)	$6,592,109	0.6%	Rank history: #62 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
41	Trident Technologies, LLC Top agencies Army (Department of the Army)	$6,416,625	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Berry Technology Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$6,382,751	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Amar Health IT, LLC Top agencies DISA (Defense Information Systems Agency)	$6,289,141	0.5%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
44	Bnl, Inc. Top agencies Commerce (Department of Commerce)	$6,052,669	0.5%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
45	Nationwide It Services Inc. Top agencies DOI (Department of the Interior) HHS (Department of Health and Human Services)	$6,000,850	0.5%	Rank history: #83 in FY2022, #31 in FY2023, #26 in FY2024 and #28 in FY2025; new, not ranked in FY2020.
46	York Telecom Corporation Through Kinly US Corporation Top agencies SSA (Social Security Administration)	$5,982,676	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Guidehouse Inc. Top agencies HHS (Department of Health and Human Services)	$5,925,000	0.5%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
48	Nexgen Technologies Inc. Top agencies DOI (Department of the Interior)	$5,878,812	0.5%	Rank history: #28 in FY2022, #45 in FY2023, #65 in FY2024 and #86 in FY2025; new, not ranked in FY2020.
49	Amyx Inc. Top agencies DLA (Defense Logistics Agency)	$5,778,807	0.5%	Rank history: #58 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Truetandem, LLC Top agencies HHS (Department of Health and Human Services)	$5,750,403	0.5%	Rank history: #94 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
51	Kapsuun Group, LLC Top agencies Navy (Department of the Navy)	$5,475,775	0.5%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
52	Riva Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$5,417,282	0.5%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
53	Veterans EZ Info Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$5,354,413	0.5%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
54	Directviz Solutions, LLC Top agencies Army (Department of the Army)	$5,068,884	0.4%	Rank history: #39 in FY2022, #59 in FY2023, #78 in FY2024 and #83 in FY2025; new, not ranked in FY2020.
55	Teksynap Corporation Top agencies NRC (Nuclear Regulatory Commission) DLA (Defense Logistics Agency)	$5,020,262	0.4%	Rank history: #31 in FY2022, #24 in FY2023, #53 in FY2024 and #93 in FY2025; new, not ranked in FY2020.
56	Compass Point LLC Top agencies DOJ (Department of Justice)	$4,811,885	0.4%	Rank history: #20 in FY2022, #15 in FY2023, #17 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
57	Futron, Inc. Top agencies HHS (Department of Health and Human Services)	$4,763,087	0.4%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
58	Sapient Corporation Through Onpoint Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$4,732,782	0.4%	Rank history: not on the FY2022 list, #64 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
59	Metgreen Solutions Inc. Top agencies Treasury (Department of the Treasury) DFC (International Development Finance Corporation)	$4,557,048	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Astor & Sanders Corporation Top agencies DOL (Department of Labor)	$4,522,161	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Trigent Solutions Inc. Top agencies SBA (Small Business Administration)	$4,500,000	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Nippon Telegraph and Telephone Corporation Through NTT Data Federal Services, Inc. Top agencies DOJ (Department of Justice)	$4,353,142	0.4%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
63	Arctic Slope Regional Corporation 2 awardees, including Asrc Federal Data Solutions, LLC and Asrc Federal Cyber, LLC Top agencies NASA (National Aeronautics and Space Administration) DOJ (Department of Justice)	$4,221,173	0.4%	Rank history: not on the FY2022–FY2023 lists, #15 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
64	Agile Defense, LLC Top agencies Army (Department of the Army)	$4,143,806	0.4%	Rank history: #22 in FY2022, #35 in FY2023, not on the FY2024 list and #34 in FY2025; new, not ranked in FY2020.
65	Spatial Front Inc. Top agencies DOT (Department of Transportation) HUD (Department of Housing and Urban Development)	$4,131,578	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Fedscale Inc. Top agencies USDA (Department of Agriculture)	$4,129,175	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	A-Tek, Inc. Through Mackson Consulting, LLC Top agencies HHS (Department of Health and Human Services)	$4,107,151	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Garud Technology Services, Inc. Top agencies DHS (Department of Homeland Security)	$3,986,384	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
69	Acumen Solutions, Inc. Top agencies USDA (Department of Agriculture) EOP (Executive Office of the President)	$3,767,310	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Sysorex Government Services Inc. Top agencies DOJ (Department of Justice)	$3,583,864	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Seneca Global Services LLC Top agencies Army (Department of the Army)	$3,574,347	0.3%	Rank history: #70 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
72	Coggins International Corp Top agencies DLA (Defense Logistics Agency)	$3,513,175	0.3%	Rank history: #99 in FY2022, not on the FY2023 list, #96 in FY2024 and #80 in FY2025; new, not ranked in FY2020.
73	Appteon, Inc. Top agencies DOL (Department of Labor)	$3,492,731	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Broadleaf, Inc. Top agencies USSOCOM (United States Special Operations Command) Navy (Department of the Navy)	$3,414,096	0.3%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
75	International Business Machines Corporation 2 awardees Top agencies SSA (Social Security Administration) USDA (Department of Agriculture) Smithsonian (Smithsonian Institution)	$3,405,923	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Info Gain Consulting LLC Top agencies Commerce (Department of Commerce)	$3,403,309	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Koniag Management Solutions LLC Top agencies DOS (Department of State)	$3,256,731	0.3%	Rank history: #21 in FY2022, #23 in FY2023, #36 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
78	SRA International Inc. Through General Dynamics Information Technology, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$3,177,238	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Federal Information Systems, Inc. Top agencies DHA (Defense Health Agency)	$3,159,191	0.3%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
80	Starry Associates, LLC Top agencies HHS (Department of Health and Human Services)	$3,154,344	0.3%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
81	Huna Totem Corp Through Distributed Computing System Solutions Provider, Inc. Top agencies DOS (Department of State) USAF (Department of the Air Force)	$3,081,246	0.3%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
82	Sealaska Corporation Through Managed Business Solutions LLC Top agencies DOI (Department of the Interior)	$3,078,629	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Superior Government Solutions LLC Top agencies Army (Department of the Army)	$3,035,685	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Eagle Integrated Services, LLC Top agencies DNFSB (Defense Nuclear Facilities Safety Board)	$3,000,368	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Lumen Technologies, Inc. Through Lumen Technologies Government Solutions, Inc. Top agencies GSA (General Services Administration)	$3,000,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Techflow, Inc. Top agencies DHS (Department of Homeland Security)	$2,983,791	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Network Designs, Inc. Top agencies DOJ (Department of Justice)	$2,950,814	0.3%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
88	Bowhead Cybersecurity Solutions & Services, LLC Top agencies Navy (Department of the Navy)	$2,860,750	0.2%	Rank history: not on the FY2022–FY2024 lists and #61 in FY2025; new, not ranked in FY2020.
89	Serdi-Llc Top agencies USDA (Department of Agriculture)	$2,800,978	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Ipkeys Technologies LLC Top agencies DLA (Defense Logistics Agency)	$2,779,132	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Nana Regional Corporation Inc 2 awardees, including Cloud Lake Technology LLC and Affigent, LLC Top agencies DOJ (Department of Justice) Army (Department of the Army)	$2,713,456	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Dynamo Technologies, LLC Top agencies USDA (Department of Agriculture)	$2,625,414	0.2%	Rank history: #89 in FY2022, #58 in FY2023, #40 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
93	Clango, LLC Top agencies DOI (Department of the Interior)	$2,619,340	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	At-Impact LLC Top agencies Treasury (Department of the Treasury)	$2,592,930	0.2%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
95	Strategic Enterprise Solutions Inc. Through Steampunk, Inc. Top agencies DHS (Department of Homeland Security)	$2,592,897	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Soft TECH Consulting, Inc. Top agencies Army (Department of the Army)	$2,587,262	0.2%	Rank history: #72 in FY2022, #60 in FY2023, #89 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
97	Universal Consulting Services, LLC Top agencies Navy (Department of the Navy)	$2,581,813	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Derivative LLC Top agencies Treasury (Department of the Treasury)	$2,484,600	0.2%	Rank history: #77 in FY2022, not on the FY2023–FY2024 lists and #95 in FY2025; new, not ranked in FY2020.
99	DKW Communications Inc. Top agencies GSA (General Services Administration) Commerce (Department of Commerce)	$2,481,654	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Definitive Logic Corporation Top agencies DHS (Department of Homeland Security)	$2,436,987	0.2%	Rank history: not on the FY2022–FY2024 lists and #40 in FY2025; new, not ranked in FY2020.

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 $1.18 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