Top 100 Contractors in PSC DJ01: IT and Telecom – Security and Compliance Support Services (Labor), FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) FTC (Federal Trade Commission)	$655,292,988	40.8%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	On Assignment, Inc. 2 awardees, including ECS Federal, LLC and Iron Vine Security LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) Treasury (Department of the Treasury)	$83,439,200	5.2%	Rank history: not on the FY2021 list, #4 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
3	Deloitte LLP 2 awardees, including Deloitte & Touche LLP and Deloitte Consulting LLP Top agencies SSA (Social Security Administration) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$63,419,561	3.9%	Rank history: #57 in FY2021, #19 in FY2022, #3 in FY2024 and #3 in FY2025; up 16 since FY2022.
4	Strategic Enterprise Solutions Inc. Through Steampunk, Inc. Top agencies DHS (Department of Homeland Security)	$36,742,126	2.3%	Rank history: not on the FY2021 list, #3 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
5	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy) HHS (Department of Health and Human Services) DOL (Department of Labor)	$30,008,007	1.9%	Rank history: #28 in FY2021, #12 in FY2022, #11 in FY2024 and #27 in FY2025; up 7 since FY2022.
6	Arctic Slope Regional Corporation 2 awardees, including Asrc Communications, Ltd. Top agencies DISA (Defense Information Systems Agency)	$26,453,599	1.6%	Rank history: #7 in FY2021, #5 in FY2022, #13 in FY2024 and #2 in FY2025; down 1 since FY2022.
7	Dynamo Technologies, LLC Top agencies USDA (Department of Agriculture)	$25,208,912	1.6%	Rank history: #65 in FY2021, #8 in FY2022, #7 in FY2024 and #10 in FY2025; up 1 since FY2022.
8	Deloitte Consulting LLP Top agencies DOL (Department of Labor) Navy (Department of the Navy) SSA (Social Security Administration)	$25,093,777	1.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 103 since FY2022.
9	Echelon Services, LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$19,707,487	1.2%	Rank history: not on the FY2021 list, #6 in FY2022, #24 in FY2024 and not on the FY2025 list; down 3 since FY2022.
10	Aretecsbd LLC Top agencies DHS (Department of Homeland Security)	$19,117,877	1.2%	Rank history: not on the FY2021 list, #38 in FY2022, #12 in FY2024 and #13 in FY2025; up 28 since FY2022.
11	Carahsoft Technology Corp Top agencies DISA (Defense Information Systems Agency) DOE (Department of Energy) DHS (Department of Homeland Security)	$17,769,435	1.1%	Rank history: not on the FY2021 list, #29 in FY2022, #67 in FY2024 and not on the FY2025 list; up 18 since FY2022.
12	Cloud Lake Technology LLC Top agencies Army (Department of the Army)	$17,212,693	1.1%	Rank history: not on the FY2021 list, #60 in FY2022, #8 in FY2024 and #11 in FY2025; up 48 since FY2022.
13	HP Enterprise Services LLC 3 awardees, including Peraton Technology Services Inc., Peraton Inc. and Peraton Enterprise Solutions LLC Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$16,002,993	1.0%	Rank history: #4 in FY2021, #7 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
14	Softek Feditc LLC Top agencies DHS (Department of Homeland Security)	$15,664,446	1.0%	Rank history: #17 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
15	Maveris LLC Top agencies VA (Department of Veterans Affairs)	$15,420,079	1.0%	Rank history: not on the FY2021 list, #25 in FY2022, #9 in FY2024 and #8 in FY2025; up 10 since FY2022.
16	Accenture Inc. Through Accenture Federal Services LLC Top agencies DHS (Department of Homeland Security) DLA (Defense Logistics Agency)	$15,073,842	0.9%	Rank history: not on the FY2021 list, #21 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
17	Agile-Bot II LLC Top agencies Navy (Department of the Navy)	$14,985,000	0.9%	Rank history: #12 in FY2021, #10 in FY2022, #18 in FY2024 and #17 in FY2025; down 7 since FY2022.
18	Xtec, Incorporated Top agencies GSA (General Services Administration)	$14,587,460	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 194 since FY2022.
19	Valiant Solutions LLC Top agencies ED (Department of Education) PBGC (Pension Benefit Guaranty Corporation)	$14,518,016	0.9%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and #28 in FY2025; new.
20	Teksynap Corporation Top agencies DTRA (Defense Threat Reduction Agency) DLA (Defense Logistics Agency) Army (Department of the Army)	$13,476,096	0.8%	Rank history: not on the FY2021 list, #39 in FY2022, #17 in FY2024 and #24 in FY2025; up 19 since FY2022.
21	Foxhole Technology LLC Top agencies DHS (Department of Homeland Security)	$12,703,418	0.8%	Rank history: #9 in FY2021, #14 in FY2022, #22 in FY2024 and #18 in FY2025; down 7 since FY2022.
22	ZEN Strategics LLC Top agencies DHS (Department of Homeland Security)	$12,185,998	0.8%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2024 and #29 in FY2025; new.
23	Sierra 7 Inc Through Sierra7, Inc. Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$11,347,894	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Oasis Systems, LLC Top agencies NRC (Nuclear Regulatory Commission) DHS (Department of Homeland Security)	$11,284,963	0.7%	Rank history: #53 in FY2021, #44 in FY2022, #30 in FY2024 and #30 in FY2025; up 20 since FY2022.
25	Resource Management Concepts, Inc. Top agencies Navy (Department of the Navy)	$11,226,185	0.7%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and #5 in FY2025; up 203 since FY2022.
26	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$9,813,283	0.6%	Rank history: #5 in FY2021, #24 in FY2022, not on the FY2024 list and #23 in FY2025; down 2 since FY2022.
27	Zermount, Inc. Top agencies DHS (Department of Homeland Security)	$9,490,216	0.6%	Rank history: #24 in FY2021, #36 in FY2022, #25 in FY2024 and #26 in FY2025; up 9 since FY2022.
28	Assyst Inc. Top agencies HHS (Department of Health and Human Services)	$9,335,634	0.6%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2024 and #60 in FY2025; new.
29	Silosmashers, Inc. Top agencies DHS (Department of Homeland Security)	$8,674,769	0.5%	Rank history: #19 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
30	Alliantcorps, LLC Top agencies USSOCOM (United States Special Operations Command)	$8,393,745	0.5%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and not on the FY2025 list; new.
31	First Information Technology Services, Inc. Top agencies DHS (Department of Homeland Security)	$8,385,130	0.5%	Rank history: not on the FY2021 list, #50 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
32	Agile Decision Sciences, LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$7,778,525	0.5%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2024 and not on the FY2025 list; new.
33	Information Systems Solutions, Inc. Top agencies Navy (Department of the Navy)	$7,535,000	0.5%	Rank history: not on the FY2021 list, #28 in FY2022, #20 in FY2024 and #25 in FY2025; down 5 since FY2022.
34	Yahya Technologies LLC Top agencies SBA (Small Business Administration)	$7,479,384	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
35	J2X Technologies LLC Through Excel Technologies, LLC Top agencies USDA (Department of Agriculture)	$6,961,272	0.4%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and not on the FY2025 list; new.
36	Mindpoint Group LLC Top agencies Treasury (Department of the Treasury)	$6,857,619	0.4%	Rank history: #21 in FY2021, not on the FY2022 list, #37 in FY2024 and #34 in FY2025; up 114 since FY2022.
37	Clarity Innovations LLC Top agencies Army (Department of the Army)	$6,794,678	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 102 since FY2022.
38	Customer Value Partners, LLC Top agencies HHS (Department of Health and Human Services)	$6,675,284	0.4%	Rank history: #54 in FY2021, #31 in FY2022, #44 in FY2024 and #43 in FY2025; down 7 since FY2022.
39	Metronome LLC Top agencies Army (Department of the Army)	$6,599,656	0.4%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and not on the FY2025 list; new.
40	The One 23 Group Inc. Top agencies DHS (Department of Homeland Security)	$6,469,202	0.4%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and #42 in FY2025; new.
41	Compass Federal Consulting Limited Liability Company Top agencies HHS (Department of Health and Human Services)	$6,418,904	0.4%	Rank history: #99 in FY2021, #55 in FY2022, #59 in FY2024 and #64 in FY2025; up 14 since FY2022.
42	XOR Security LLC Top agencies DHS (Department of Homeland Security)	$6,346,423	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Veterans EZ Info Inc. Top agencies VA (Department of Veterans Affairs)	$6,175,338	0.4%	Rank history: #25 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
44	Electrosoft Services Inc. Top agencies Treasury (Department of the Treasury) NMB (National Mediation Board)	$6,103,489	0.4%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and #62 in FY2025; new.
45	The IQ Business Group (PTY) Ltd Through The IQ Business Group, Inc. Top agencies DOI (Department of the Interior)	$5,964,768	0.4%	Rank history: #14 in FY2021, #26 in FY2022, #70 in FY2024 and not on the FY2025 list; down 19 since FY2022.
46	Saliense Consulting LLC Top agencies DHS (Department of Homeland Security)	$5,874,080	0.4%	Rank history: #27 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
47	Motorola Inc Through Motorola Solutions, Inc. Top agencies DOJ (Department of Justice)	$5,751,046	0.4%	Rank history: not on the FY2021 list, #40 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
48	Aquarian Systems LLC Top agencies DOS (Department of State)	$5,746,581	0.4%	Rank history: #48 in FY2021, #70 in FY2022, #47 in FY2024 and #58 in FY2025; up 22 since FY2022.
49	Insignia Technology Services, LLC Top agencies VA (Department of Veterans Affairs)	$5,456,640	0.3%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and #54 in FY2025; new.
50	Omni Fed LLC Top agencies Army (Department of the Army)	$5,372,113	0.3%	Rank history: #42 in FY2021, #46 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
51	Tacg, LLC Top agencies HHS (Department of Health and Human Services)	$5,339,043	0.3%	Rank history: #32 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
52	EDC Consulting LLC Through Mclane Advanced Technologies LLC Top agencies DOE (Department of Energy)	$5,288,686	0.3%	Rank history: #29 in FY2021, #42 in FY2022, #55 in FY2024 and #55 in FY2025; down 10 since FY2022.
53	Cybernamic LLC Top agencies DHS (Department of Homeland Security)	$5,160,168	0.3%	Rank history: not on the FY2021 list, #22 in FY2022, #64 in FY2024 and #79 in FY2025; down 31 since FY2022.
54	Horizon Industries, Limited Top agencies DLA (Defense Logistics Agency)	$4,862,110	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #29 in FY2024 and #38 in FY2025; down 1 since FY2022.
55	Criterion Systems, L.L.C. Top agencies DOT (Department of Transportation)	$4,427,058	0.3%	Rank history: #63 in FY2021, #75 in FY2022, #87 in FY2024 and #86 in FY2025; up 20 since FY2022.
56	Integrated Security Technologies, Inc. Top agencies DOE (Department of Energy)	$4,411,984	0.3%	Rank history: #64 in FY2021, #52 in FY2022, #38 in FY2024 and #39 in FY2025; down 4 since FY2022.
57	Asrc Federal Data Networx, LLC Top agencies Commerce (Department of Commerce)	$4,321,329	0.3%	Rank history: #33 in FY2021, #57 in FY2022, #66 in FY2024 and not on the FY2025 list; unchanged since FY2022.
58	Accelgov LLC Top agencies Navy (Department of the Navy) DFC (International Development Finance Corporation)	$4,227,226	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #37 in FY2025; new.
59	World Wide Technology LLC Top agencies DOE (Department of Energy)	$4,138,487	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
60	Coalfire Systems, Inc. Through Veris Group, LLC Top agencies HHS (Department of Health and Human Services)	$3,828,190	0.2%	Rank history: #67 in FY2021, #92 in FY2022 and not on the FY2024–FY2025 lists; up 32 since FY2022.
61	Reli Group Inc Top agencies HHS (Department of Health and Human Services)	$3,704,999	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2024 and not on the FY2025 list; new.
62	Chevo LLC Top agencies DHS (Department of Homeland Security)	$3,694,898	0.2%	Rank history: not on the FY2021 list, #47 in FY2022, #80 in FY2024 and #73 in FY2025; down 15 since FY2022.
63	Solutions By Design II, LLC Top agencies DHS (Department of Homeland Security)	$3,586,427	0.2%	Rank history: not on the FY2021 list, #15 in FY2022 and not on the FY2024–FY2025 lists; down 48 since FY2022.
64	Nippon Telegraph and Telephone Corporation Through NTT Data Federal Services, Inc. Top agencies DOJ (Department of Justice)	$3,522,356	0.2%	Rank history: #13 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; down 47 since FY2022.
65	H.i.g. Capital Management Inc. Through Empower AI, Inc. Top agencies Army (Department of the Army)	$3,273,936	0.2%	Rank history: not on the FY2021 list, #62 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
66	Strategic Data Systems, Inc. Top agencies Navy (Department of the Navy)	$3,167,935	0.2%	Rank history: #37 in FY2021, #63 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
67	Kingfisher Systems, Inc. Top agencies DOT (Department of Transportation)	$3,086,659	0.2%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2024 and not on the FY2025 list; new.
68	Martinfederal Consulting LLC Top agencies DOJ (Department of Justice)	$3,064,349	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
69	Xgility LLC Top agencies OPM (Office of Personnel Management)	$3,060,985	0.2%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2024 and not on the FY2025 list; new.
70	Zero Trust LLC Top agencies HHS (Department of Health and Human Services)	$2,987,472	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Synergist JV LLC Top agencies DHS (Department of Homeland Security)	$2,983,166	0.2%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and #14 in FY2025; up 37 since FY2022.
72	AA Consulting Top agencies FCC (Federal Communications Commission)	$2,828,285	0.2%	Rank history: not on the FY2021 list, #64 in FY2022, #83 in FY2024 and not on the FY2025 list; down 8 since FY2022.
73	Linktec LLC Top agencies DHS (Department of Homeland Security)	$2,773,612	0.2%	Rank history: not on the FY2021 list, #27 in FY2022 and not on the FY2024–FY2025 lists; down 46 since FY2022.
74	Global Solutions Group Inc. Top agencies DOI (Department of the Interior)	$2,722,088	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and not on the FY2025 list; new.
75	VMD Systems Integrators, LLC Top agencies DHS (Department of Homeland Security)	$2,718,216	0.2%	Rank history: #56 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
76	Intellect Solutions, LLC Top agencies Treasury (Department of the Treasury)	$2,605,942	0.2%	Rank history: not on the FY2021 list, #69 in FY2022, #90 in FY2024 and not on the FY2025 list; down 7 since FY2022.
77	Axiom Consultants, Inc. Top agencies Navy (Department of the Navy) DISA (Defense Information Systems Agency)	$2,575,260	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and not on the FY2025 list; new.
78	Zeneth Technology Partners LLC Top agencies SBA (Small Business Administration)	$2,549,362	0.2%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2024 and not on the FY2025 list; new.
79	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies HHS (Department of Health and Human Services)	$2,526,898	0.2%	Rank history: #35 in FY2021, #71 in FY2022, not on the FY2024 list and #83 in FY2025; down 8 since FY2022.
80	Easy Dynamics Corporation Top agencies DHS (Department of Homeland Security)	$2,410,381	0.2%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2024 and #76 in FY2025; new.
81	Hana Technologies & Systems, Inc. Top agencies Navy (Department of the Navy)	$2,304,136	0.1%	Rank history: #44 in FY2021, #83 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
82	New Directions Technologies, Inc. Top agencies Navy (Department of the Navy)	$2,298,914	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Agile Defense, LLC Top agencies Army (Department of the Army)	$2,279,203	0.1%	Rank history: #72 in FY2021, #77 in FY2022, not on the FY2024 list and #95 in FY2025; down 6 since FY2022.
84	Compass Point LLC Top agencies DOJ (Department of Justice)	$2,261,981	0.1%	Rank history: not on the FY2021 list, #90 in FY2022, #65 in FY2024 and #81 in FY2025; up 6 since FY2022.
85	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies SSA (Social Security Administration)	$2,250,139	0.1%	Rank history: #40 in FY2021, #78 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
86	Information Technology Company, L.L.C. Top agencies DHS (Department of Homeland Security)	$2,227,103	0.1%	Rank history: #41 in FY2021, #80 in FY2022, not on the FY2024 list and #100 in FY2025; down 6 since FY2022.
87	Discover Technologies LLC Top agencies HHS (Department of Health and Human Services)	$2,214,873	0.1%	Rank history: #22 in FY2021, #54 in FY2022 and not on the FY2024–FY2025 lists; down 33 since FY2022.
88	Subsystem Technologies Inc. Through KMS Solutions, LLC Top agencies Navy (Department of the Navy)	$2,203,081	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 14 since FY2022.
89	APF Technology LLC Top agencies DHS (Department of Homeland Security)	$2,119,741	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
90	RPI Group, Inc. Top agencies Navy (Department of the Navy)	$2,099,611	0.1%	Rank history: not on the FY2021 list, #81 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
91	Ernst & Young LLP Top agencies DOT (Department of Transportation)	$2,099,335	0.1%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
92	Koniag Data Solutions LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy)	$1,968,369	0.1%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2024 and #48 in FY2025; new.
93	Dignari, LLC Top agencies DHS (Department of Homeland Security)	$1,889,908	0.1%	Rank history: not on the FY2021 list, #89 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
94	Chainbridge Solutions Incorporated Top agencies EPA (Environmental Protection Agency)	$1,886,987	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 63 since FY2022.
95	Sienna Systems Corp Top agencies DOS (Department of State)	$1,878,348	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	I - Assure, L.l.c Top agencies Navy (Department of the Navy)	$1,857,000	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #92 in FY2025; new.
97	Innovative Management Concepts, Inc. Top agencies DHS (Department of Homeland Security)	$1,856,511	0.1%	Rank history: #61 in FY2021, #85 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
98	Netizen Corporation Top agencies Army (Department of the Army)	$1,830,818	0.1%	Rank history: not on the FY2021 list, #97 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
99	Halvik LLC Top agencies Commerce (Department of Commerce) Treasury (Department of the Treasury) USSOCOM (United States Special Operations Command)	$1,799,056	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and not on the FY2025 list; up 13 since FY2022.
100	Neevsys Inc Top agencies Treasury (Department of the Treasury)	$1,798,830	0.1%	Rank history: not on the FY2021 list, #66 in FY2022 and not on the FY2024–FY2025 lists; down 34 since FY2022.

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 $1.61 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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