Top 100 Contractors in PSC R430: Support – Professional: Physical Security and Badging, FY2021

Name: Top 100 Contractors in PSC R430: Support – Professional: Physical Security and Badging, FY2021
Creator: GovTribe

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

The top 10 won 72% of FY2021 PSC R430 contract dollars

Contract obligations: $1,020,660,161 Net of deobligations, by contracts coded PSC R430
Contractors: 283 Parent companies with an obligation
Largest contractor: Aegis Defense Services, $154 million, 14.3% 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	Aegis Defense Services, 2 awardees, including Gardaworld Federal Services LLC Top agencies DOS (Department of State)	$153,846,786	14.3%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
2	Triple Canopy Inc. 5 awardees, including Centerra Group, LLC, Omniplex World Services Corporation and American K-9 Detection Services, LLC Top agencies DOS (Department of State) Commerce (Department of Commerce) CSOSA (Court Services and Offender Supervision Agency)	$144,527,760	13.5%	Rank history: #3 in FY2022, #8 in FY2023, #3 in FY2024 and #3 in FY2025; up 2 since FY2020.
3	The Day & Zimmermann Group, Inc. Through SOC LLC Top agencies DOS (Department of State)	$136,689,028	12.7%	Rank history: #1 in FY2022, #4 in FY2023, #13 in FY2024 and not on the FY2025 list; down 2 since FY2020.
4	Inter-Con Security Systems, Inc. Top agencies DOS (Department of State) USDA (Department of Agriculture)	$135,565,616	12.6%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #1 in FY2025; down 1 since FY2020.
5	EOD Technology Inc. Through Acuity - Janus Global, LLC Top agencies DOS (Department of State)	$56,880,570	5.3%	Rank history: #4 in FY2022, #6 in FY2023, #10 in FY2024 and not on the FY2025 list; up 1 since FY2020.
6	Securitas AB Through Paragon Systems Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) USSOCOM (United States Special Operations Command)	$54,049,777	5.0%	Rank history: #5 in FY2022, #5 in FY2023, #4 in FY2024 and not on the FY2025 list; up 25 since FY2020.
7	Diversified Protection Corp Top agencies WHS (DOD Washington Headquarters Service) DOL (Department of Labor) EPA (Environmental Protection Agency)	$37,251,850	3.5%	Rank history: #6 in FY2022, #9 in FY2023, #9 in FY2024 and #9 in FY2025; up 1 since FY2020.
8	PAE Government Services Inc. 3 awardees, including PAE Professional Services, LLC and Metis Solutions, LLC Top agencies Army (Department of the Army) DOS (Department of State) OSD (Office of the Secretary of Defense)	$23,273,739	2.2%	Rank history: #8 in FY2022, #12 in FY2023, #73 in FY2024 and not on the FY2025 list; up 11 since FY2020.
9	Afognak Native Corporation 3 awardees, including Alutiiq Advanced Security Solutions LLC, Alutiiq Pacific, LLC and Shields Point LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) DOD (Department of Defense)	$20,971,807	2.0%	Rank history: #9 in FY2022, #69 in FY2023, #26 in FY2024 and not on the FY2025 list; up 6 since FY2020.
10	Integrated Security Technologies, Inc. Top agencies DHS (Department of Homeland Security) GSA (General Services Administration)	$10,761,714	1.0%	Rank history: #21 in FY2022, #39 in FY2023, #68 in FY2024 and not on the FY2025 list; up 37 since FY2020.
11	Security Walls LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$10,222,923	1.0%	Rank history: #16 in FY2022, #45 in FY2023, #51 in FY2024 and #80 in FY2025; up 5 since FY2020.
12	Golden Svcs, LLC Top agencies DOE (Department of Energy)	$8,965,279	0.8%	Rank history: #14 in FY2022, #17 in FY2023, #24 in FY2024 and not on the FY2025 list; up 6 since FY2020.
13	Protection Strategies Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice) DOE (Department of Energy)	$8,661,024	0.8%	Rank history: #12 in FY2022, #16 in FY2023, #11 in FY2024 and #8 in FY2025; up 12 since FY2020.
14	Chenega Security International, LLC Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$8,096,000	0.8%	Rank history: #20 in FY2022, #70 in FY2023, #49 in FY2024 and not on the FY2025 list; up 29 since FY2020.
15	Securamerica, LLC Through American Security Programs Inc. Top agencies GAO (Government Accountability Office)	$7,112,438	0.7%	Rank history: not on the FY2022 list, #11 in FY2023, #15 in FY2024 and not on the FY2025 list; up 6 since FY2020.
16	Singularity Security Group LLC Top agencies Navy (Department of the Navy)	$6,572,969	0.6%	Rank history: #11 in FY2022, #13 in FY2023, #14 in FY2024 and #11 in FY2025; new, not ranked in FY2020.
17	1ST Class Security, Inc. Top agencies VA (Department of Veterans Affairs)	$6,450,840	0.6%	Rank history: not on the FY2022–FY2025 lists; up 28 since FY2020.
18	Nana Regional Corporation Inc 2 awardees, including Lockwood Hills Federal LLC and Rivertech LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$5,916,201	0.6%	Rank history: #22 in FY2022, #62 in FY2023, not on the FY2024 list and #83 in FY2025; up 6 since FY2020.
19	Aquate II, LLC Top agencies Navy (Department of the Navy)	$5,622,000	0.5%	Rank history: not on the FY2022 list, #81 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
20	Pond Security Service GMBH Top agencies DODEA (Department of Defense Education Activity)	$5,370,471	0.5%	Rank history: #37 in FY2022, #43 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
21	Bering Straits Native Corporation Through Bering Global Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$5,229,936	0.5%	Rank history: #24 in FY2022, #22 in FY2023, #66 in FY2024 and not on the FY2025 list; up 221 since FY2020.
22	Culpepper & Associates Security Services Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$4,270,895	0.4%	Rank history: #26 in FY2022, #21 in FY2023, #27 in FY2024 and #28 in FY2025; up 18 since FY2020.
23	Apsi-Centerra JV, LLC Top agencies DHS (Department of Homeland Security)	$4,023,583	0.4%	Rank history: not on the FY2022 list, #74 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
24	Michael Stapleton Associates, Ltd. Top agencies DOS (Department of State) GSA (General Services Administration) DOJ (Department of Justice)	$4,003,138	0.4%	Rank history: #28 in FY2022, #44 in FY2023, not on the FY2024 list and #99 in FY2025; up 5 since FY2020.
25	Markham Investigation & Protection LLC Top agencies USDA (Department of Agriculture)	$3,849,397	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	LS3 Inc. Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$3,789,435	0.4%	Rank history: #32 in FY2022, #46 in FY2023, #36 in FY2024 and #36 in FY2025; up 13 since FY2020.
27	Security Watch Inc. Top agencies DHS (Department of Homeland Security)	$3,655,198	0.3%	Rank history: #25 in FY2022, #29 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
28	Westmoreland Protection Agency, Inc. Top agencies VA (Department of Veterans Affairs)	$3,625,130	0.3%	Rank history: #46 in FY2022 and not on the FY2023–FY2025 lists; up 24 since FY2020.
29	Chenega Infinity, LLC Top agencies DOI (Department of the Interior) DARPA (Defense Advanced Research Projects Agency)	$3,581,099	0.3%	Rank history: #13 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; down 18 since FY2020.
30	Johnson Controls Security Solutions LLC 5 awardees, including Johnson Controls, Inc. and Johnson Controls Fire Protection LP Top agencies Treasury (Department of the Treasury) DOI (Department of the Interior) DOL (Department of Labor)	$3,443,137	0.3%	Rank history: #41 in FY2022, #55 in FY2023, #53 in FY2024 and #49 in FY2025; up 21 since FY2020.
31	Huntsville Rehabilitation Foundation Top agencies Army (Department of the Army)	$3,402,807	0.3%	Rank history: #42 in FY2022, #33 in FY2023, #45 in FY2024 and #43 in FY2025; up 4 since FY2020.
32	Next Generation Logistics, LLC Top agencies DHS (Department of Homeland Security)	$3,355,398	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	M.c. Dean, Inc. Top agencies WHS (DOD Washington Headquarters Service)	$3,298,059	0.3%	Rank history: not on the FY2022–FY2025 lists; up 33 since FY2020.
34	Excelsior Defense, Inc. Top agencies VA (Department of Veterans Affairs) PBGC (Pension Benefit Guaranty Corporation)	$3,021,300	0.3%	Rank history: #35 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
35	Hana Industries, Inc. Top agencies DOT (Department of Transportation)	$2,930,654	0.3%	Rank history: #29 in FY2022, #23 in FY2023, #35 in FY2024 and #31 in FY2025; new, not ranked in FY2020.
36	Chronos Systems Inc. Top agencies WHS (DOD Washington Headquarters Service)	$2,872,000	0.3%	Rank history: #34 in FY2022, #25 in FY2023, #47 in FY2024 and #39 in FY2025; up 2 since FY2020.
37	The Cogar Group. Ltd. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$2,807,401	0.3%	Rank history: #33 in FY2022, #19 in FY2023, #22 in FY2024 and #21 in FY2025; up 9 since FY2020.
38	Signet Technologies Inc. Through Convergint Technologies LLC Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$2,747,435	0.3%	Rank history: #39 in FY2022, #40 in FY2023, #55 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
39	Corporate Crime Control Protective Services, Inc. Top agencies DHS (Department of Homeland Security)	$2,729,478	0.3%	Rank history: #55 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
40	Oatridge Security Group, Inc. Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$2,728,583	0.3%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; up 48 since FY2020.
41	Sec-Ops, Inc. Top agencies DHS (Department of Homeland Security)	$2,320,200	0.2%	Rank history: #83 in FY2022, #61 in FY2023, #70 in FY2024 and #58 in FY2025; up 7 since FY2020.
42	Mclaughlin Research Corporation Top agencies Navy (Department of the Navy)	$2,319,326	0.2%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
43	Bruckedwards, Inc. Top agencies DOL (Department of Labor)	$2,299,431	0.2%	Rank history: #43 in FY2022, #41 in FY2023, #63 in FY2024 and #52 in FY2025; up 11 since FY2020.
44	Mid Atlantic Professionals Inc. Top agencies Navy (Department of the Navy)	$2,225,571	0.2%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
45	HUI O Hana Pono Through HBC Management Services, Inc. Top agencies DOT (Department of Transportation)	$2,164,845	0.2%	Rank history: not on the FY2022–FY2025 lists; up 18 since FY2020.
46	Risk and Strategic Management Corp. Top agencies USAID (US Agency for International Development)	$2,000,000	0.2%	Rank history: #78 in FY2022, #53 in FY2023, #75 in FY2024 and not on the FY2025 list; up 4 since FY2020.
47	Broadland Guarding Services Limited Top agencies DODEA (Department of Defense Education Activity)	$1,908,590	0.2%	Rank history: #62 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
48	Surveillance Security, Inc. Top agencies VA (Department of Veterans Affairs)	$1,907,899	0.2%	Rank history: not on the FY2022 list, #59 in FY2023, #40 in FY2024 and #41 in FY2025; up 51 since FY2020.
49	Inalab Consulting, Inc. Top agencies DOE (Department of Energy)	$1,885,000	0.2%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
50	SOC LLC Top agencies DOS (Department of State)	$1,840,958	0.2%	Rank history: not on the FY2022–FY2023 lists, #8 in FY2024 and not on the FY2025 list; down 38 since FY2020.
51	Caduceus Inc. Top agencies SBA (Small Business Administration)	$1,808,912	0.2%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
52	Advanced Resource Technologies, Inc. Top agencies DHS (Department of Homeland Security)	$1,750,825	0.2%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
53	Elliott Security Solutions LLC Top agencies DHS (Department of Homeland Security)	$1,746,000	0.2%	Rank history: #15 in FY2022, #20 in FY2023, #59 in FY2024 and #75 in FY2025; new, not ranked in FY2020.
54	Servexo Top agencies VA (Department of Veterans Affairs)	$1,706,348	0.2%	Rank history: #27 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 37 since FY2020.
55	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency)	$1,652,649	0.2%	Rank history: #52 in FY2022, #63 in FY2023, #80 in FY2024 and #68 in FY2025; up 13 since FY2020.
56	Puyenpa Services, LLC Top agencies HHS (Department of Health and Human Services)	$1,637,066	0.2%	Rank history: #40 in FY2022, #42 in FY2023, #97 in FY2024 and not on the FY2025 list; up 4 since FY2020.
57	Tenax Technologies LLC Top agencies Army (Department of the Army)	$1,579,890	0.1%	Rank history: #77 in FY2022, #68 in FY2023, #87 in FY2024 and #72 in FY2025; down 2 since FY2020.
58	Digitalspec, LLC Top agencies ED (Department of Education)	$1,566,575	0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
59	Govstrive LLC Top agencies USDA (Department of Agriculture)	$1,518,962	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
60	American Eagle Protective Services Corp Top agencies DHS (Department of Homeland Security) DOL (Department of Labor)	$1,514,995	0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 189 since FY2020.
61	The Chenega Corporation 2 awardees, including Chenega Global Protection, LLC Top agencies Treasury (Department of the Treasury)	$1,374,858	0.1%	Rank history: #45 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; down 48 since FY2020.
62	Starside Security & Investigation Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$1,348,647	0.1%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
63	Synergy Solutions, Incorporated Top agencies Army (Department of the Army)	$1,286,077	0.1%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
64	BAE Systems PLC Through BAE Systems Technology Solutions & Services Inc. Top agencies Navy (Department of the Navy)	$1,263,957	0.1%	Rank history: not on the FY2022–FY2025 lists; down 20 since FY2020.
65	System High Corporation Top agencies OSD (Office of the Secretary of Defense)	$1,156,521	0.1%	Rank history: #59 in FY2022, #73 in FY2023, #71 in FY2024 and #62 in FY2025; up 5 since FY2020.
66	Gardaworld North America Top agencies DOS (Department of State)	$1,152,232	0.1%	Rank history: #53 in FY2022, #76 in FY2023, #85 in FY2024 and not on the FY2025 list; up 5 since FY2020.
67	Connexus Hub Inc. Top agencies Navy (Department of the Navy)	$1,149,926	0.1%	Rank history: not on the FY2022–FY2023 lists, #76 in FY2024 and #69 in FY2025; up 17 since FY2020.
68	Mid Atlantic Security Agency, LLC Top agencies VA (Department of Veterans Affairs)	$1,125,028	0.1%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 35 since FY2020.
69	Cherokee Nation Through Cherokee Nation Strategic Programs, L.L.C. Top agencies Treasury (Department of the Treasury)	$1,067,140	0.1%	Rank history: #58 in FY2022, #56 in FY2023, #79 in FY2024 and not on the FY2025 list; up 48 since FY2020.
70	B O S Security, Inc. Top agencies Army (Department of the Army)	$1,058,853	0.1%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
71	Vectrus Systems LLC Top agencies NASA (National Aeronautics and Space Administration)	$1,046,436	0.1%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
72	W & W Protection LLC Top agencies VA (Department of Veterans Affairs)	$1,044,909	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
73	The Whitestone Group, Inc. Top agencies VA (Department of Veterans Affairs)	$998,621	0.1%	Rank history: #69 in FY2022, #31 in FY2023, #39 in FY2024 and #19 in FY2025; up 17 since FY2020.
74	Global Security Management Agency, Inc. Top agencies DMEA (Defense Microelectronics Activity)	$996,467	0.1%	Rank history: #63 in FY2022, #26 in FY2023, #31 in FY2024 and #27 in FY2025; up 7 since FY2020.
75	Firelake Construction Inc. Top agencies Army (Department of the Army)	$991,159	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; up 10 since FY2020.
76	Stratus Security Management Inc. Top agencies DMA (Defense Media Activity)	$976,772	0.1%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
77	Acuity - Janus Global, LLC Top agencies DOS (Department of State)	$965,771	0.1%	Rank history: not on the FY2022–FY2023 lists, #7 in FY2024 and #5 in FY2025; down 63 since FY2020.
78	California Security Services, Inc. Top agencies DHS (Department of Homeland Security)	$937,972	0.1%	Rank history: not on the FY2022–FY2025 lists; down 45 since FY2020.
79	Watermark Risk Management International, LLC Top agencies DOI (Department of the Interior)	$924,974	0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
80	Inner-Parish Security, Corp Top agencies DHS (Department of Homeland Security)	$894,303	0.1%	Rank history: not on the FY2022–FY2025 lists; up 24 since FY2020.
81	Tactical Solutions International Top agencies HHS (Department of Health and Human Services)	$851,249	0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
82	Advantage SCI LLC Top agencies DHS (Department of Homeland Security)	$844,639	0.1%	Rank history: #70 in FY2022, #52 in FY2023, not on the FY2024 list and #48 in FY2025; down 21 since FY2020.
83	TSO Armor and Training, Inc. Top agencies DHS (Department of Homeland Security)	$812,620	0.1%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
84	Cynergy Professional Systems LLC Top agencies MDA (DOD Missile Defense Agency)	$782,489	0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
85	DLT Solutions LLC Top agencies HHS (Department of Health and Human Services)	$772,439	0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
86	Veteran Security Services LLC Top agencies VA (Department of Veterans Affairs)	$762,545	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
87	Sanford Federal, Inc. Top agencies VA (Department of Veterans Affairs)	$758,380	0.1%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
88	Trust Consulting Services Inc. Top agencies FCC (Federal Communications Commission)	$735,282	0.1%	Rank history: #79 in FY2022, #96 in FY2023, not on the FY2024 list and #47 in FY2025; new, not ranked in FY2020.
89	Bowhead Mission Solutions, LLC Top agencies Army (Department of the Army)	$701,087	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Adventus Technologies Inc. Top agencies USDA (Department of Agriculture)	$695,437	0.1%	Rank history: not on the FY2022–FY2025 lists; up 31 since FY2020.
91	Quadra Control Services Limited. 2 awardees Top agencies DODEA (Department of Defense Education Activity)	$642,788	0.1%	Rank history: #36 in FY2022, #47 in FY2023, #95 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
92	T47 International, Inc. Top agencies DISA (Defense Information Systems Agency)	$642,695	0.1%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; down 56 since FY2020.
93	Cayuse Holdings LLC Through Cayuse Technologies, LLC Top agencies Navy (Department of the Navy)	$635,810	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Guard Force Inc. Top agencies VA (Department of Veterans Affairs)	$609,279	0.1%	Rank history: #71 in FY2022, #84 in FY2023, #100 in FY2024 and #82 in FY2025; down 18 since FY2020.
95	Jlgov LLC Top agencies Army (Department of the Army)	$601,206	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 24 since FY2020.
96	Oregon State of Through Oregon Department of Transportation Top agencies USDA (Department of Agriculture)	$596,686	0.1%	Rank history: not on the FY2022–FY2025 lists; up 106 since FY2020.
97	Mac Gc-Electric, Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico)	$539,186	0.1%	Rank history: not on the FY2022–FY2025 lists; up 67 since FY2020.
98	Contract Solutions, Inc. Top agencies Treasury (Department of the Treasury)	$526,264	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
99	Global Resource Solutions Inc. Top agencies DHS (Department of Homeland Security)	$487,979	<0.1%	Rank history: #81 in FY2022, #71 in FY2023, #50 in FY2024 and #37 in FY2025; up 7 since FY2020.
100	X Corp Solutions Inc. Top agencies USAF (Department of the Air Force)	$485,000	<0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.

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100 of 283 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 $1.07 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC R430 contractors in FY2021?

1. Aegis Defense Services, ($154M), 2. Triple Canopy Inc. ($145M), 3. The Day & Zimmermann Group, Inc. ($137M), 4. Inter-Con Security Systems, Inc. ($136M), 5. EOD Technology Inc. ($56.9M), 6. Securitas AB ($54M), 7. Diversified Protection Corp ($37.3M), 8. PAE Government Services Inc. ($23.3M), 9. Afognak Native Corporation ($21M), 10. Integrated Security Technologies, Inc. ($10.8M).

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