Top 100 Contractors in PSC X: Lease/Rent Facilities, FY2021

Name: Top 100 Contractors in PSC X: Lease/Rent Facilities, FY2021
Creator: GovTribe

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

The top 10 won 34% of FY2021 PSC X contract dollars

Contract obligations: $340,170,861 Net of deobligations, by contracts coded PSC X or a code under it
Contractors: 1,252 Parent companies with an obligation
Largest contractor: NIH Bayview Acquisition LLC $25.3 million, 6.9% 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	NIH Bayview Acquisition LLC Top agencies HHS (Department of Health and Human Services)	$25,318,208	6.9%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
2	Buckeye Terminals LLC Top agencies DOE (Department of Energy)	$19,518,980	5.3%	Rank history: #3 in FY2022, #6 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
3	N.s.p. Ventures Corp. Top agencies Treasury (Department of the Treasury)	$16,521,698	4.5%	Rank history: #5 in FY2022, #8 in FY2023, #8 in FY2024 and #6 in FY2025; down 1 since FY2020.
4	Fitzhenry-Guptill Holding Company Inc 2 awardees, including Delaware Storage and Pipeline Company Top agencies DLA (Defense Logistics Agency)	$14,107,282	3.8%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; up 247 since FY2020.
5	GI TC Montgomery LLC Top agencies HHS (Department of Health and Human Services)	$11,211,550	3.1%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
6	Luhr Bros., Inc. Top agencies Army (Department of the Army)	$10,361,802	2.8%	Rank history: #6 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
7	Mosswood Property Development LLC Top agencies DHS (Department of Homeland Security)	$7,941,377	2.2%	Rank history: #9 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
8	Franklin Court Inc. Top agencies MCC (Millennium Challenge Corporation)	$7,247,759	2.0%	Rank history: #11 in FY2022, #10 in FY2023, not on the FY2024 list and #13 in FY2025; up 3 since FY2020.
9	Healthcare Trust of America Inc. Through HTA - Triad, LLC Top agencies HHS (Department of Health and Human Services)	$6,998,895	1.9%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; up 28 since FY2020.
10	Global Partners LP Through Global Companies LLC Top agencies DOE (Department of Energy)	$5,784,290	1.6%	Rank history: #20 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
11	Norfolk Dredging Company Top agencies Army (Department of the Army)	$5,600,896	1.5%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
12	Jbg/ BC Fishers 1, LP Top agencies HHS (Department of Health and Human Services)	$5,389,921	1.5%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
13	Pacific Layberthing South, LLC Top agencies DOT (Department of Transportation)	$5,219,079	1.4%	Rank history: #70 in FY2022, #24 in FY2023, #20 in FY2024 and #14 in FY2025; up 53 since FY2020.
14	WSC / 6001 LLC Top agencies HHS (Department of Health and Human Services)	$5,020,637	1.4%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
15	Primoris Services Corporation Through TRC Government Services, LLC Top agencies DLA (Defense Logistics Agency)	$4,738,755	1.3%	Rank history: not on the FY2022–FY2025 lists; up 21 since FY2020.
16	Carnival Corporation Top agencies DHS (Department of Homeland Security)	$4,700,000	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	5600 Fishers Lane LLC Top agencies HHS (Department of Health and Human Services)	$4,068,078	1.1%	Rank history: #18 in FY2022, #14 in FY2023, #19 in FY2024 and #19 in FY2025; up 3 since FY2020.
18	Ma-Chis International Services, Inc. Top agencies USAF (Department of the Air Force)	$3,920,179	1.1%	Rank history: #12 in FY2022, #11 in FY2023, #24 in FY2024 and #26 in FY2025; new, not ranked in FY2020.
19	The Bank of New York Mellon Corporation Top agencies VA (Department of Veterans Affairs)	$3,826,905	1.0%	Rank history: #8 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
20	Qinetiq Group PLC Through Qinetiq Limited Top agencies USAF (Department of the Air Force)	$3,589,900	1.0%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; up 81 since FY2020.
21	Usgbf Nci, LLC Top agencies HHS (Department of Health and Human Services)	$3,290,890	0.9%	Rank history: #22 in FY2022, #18 in FY2023, #21 in FY2024 and #24 in FY2025; new, not ranked in FY2020.
22	Integrated Modular Solutions, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$3,194,909	0.9%	Rank history: #31 in FY2022 and not on the FY2023–FY2025 lists; down 14 since FY2020.
23	Standard Parking Corporation 2 awardees, including SP Plus Corporation and Central Parking Corporation Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice) DHS (Department of Homeland Security)	$2,771,008	0.8%	Rank history: #17 in FY2022, #19 in FY2023, #36 in FY2024 and #18 in FY2025; up 5 since FY2020.
24	Forge Company Through Colonial Parking, Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) USITC (International Trade Commission)	$2,625,837	0.7%	Rank history: #24 in FY2022, #17 in FY2023, #17 in FY2024 and #20 in FY2025; up 11 since FY2020.
25	Oxford Vista LLC Top agencies CNCS (Corporation for National and Community Service)	$2,450,076	0.7%	Rank history: #33 in FY2022, #25 in FY2023, #33 in FY2024 and #21 in FY2025; up 20 since FY2020.
26	The Pasha Group Through Pasha Hawaii Holdings LLC Top agencies DOT (Department of Transportation)	$2,413,884	0.7%	Rank history: #26 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
27	Mcclellan Business Park LLC Top agencies CNCS (Corporation for National and Community Service) USDA (Department of Agriculture)	$2,398,387	0.7%	Rank history: #42 in FY2022, #28 in FY2023, #28 in FY2024 and #31 in FY2025; up 4 since FY2020.
28	Oxford Bit Gallery Place Property Owner LLC	$2,326,836	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	C W Worldwide Meetings Inc. Top agencies DOS (Department of State) Navy (Department of the Navy)	$2,323,919	0.6%	Rank history: not on the FY2022–FY2025 lists; up 367 since FY2020.
30	General Dynamics Corporation Through Metro Machine Corp. Top agencies DOT (Department of Transportation)	$2,214,750	0.6%	Rank history: #32 in FY2022, #31 in FY2023, #29 in FY2024 and #22 in FY2025; up 214 since FY2020.
31	All Saints Episcopal School Top agencies CNCS (Corporation for National and Community Service)	$2,214,125	0.6%	Rank history: #48 in FY2022, #37 in FY2023, #45 in FY2024 and #48 in FY2025; up 17 since FY2020.
32	Maryland Maritime, Inc. Top agencies DOT (Department of Transportation)	$2,140,940	0.6%	Rank history: #34 in FY2022, #29 in FY2023, #55 in FY2024 and #16 in FY2025; up 1 since FY2020.
33	Life Safety Group, LLC Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$2,047,768	0.6%	Rank history: #65 in FY2022, #45 in FY2023, #56 in FY2024 and #36 in FY2025; up 14 since FY2020.
34	Sustainable Modular Management, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOI (Department of the Interior)	$2,039,205	0.6%	Rank history: #21 in FY2022, #48 in FY2023, not on the FY2024 list and #74 in FY2025; up 5 since FY2020.
35	Port of Moses Lake Top agencies USAF (Department of the Air Force)	$2,023,183	0.6%	Rank history: #35 in FY2022, #30 in FY2023, #34 in FY2024 and #30 in FY2025; up 3 since FY2020.
36	Keystone 530 TT, LLC Top agencies HHS (Department of Health and Human Services)	$1,988,822	0.5%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
37	A C Blount Concrete Service Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,866,130	0.5%	Rank history: #62 in FY2022, #55 in FY2023, #91 in FY2024 and #88 in FY2025; up 44 since FY2020.
38	American Tower Corporation 21 awardees, including American Towers LLC, Spectrasite Communications, LLC and American Tower Management LLC Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) Treasury (Department of the Treasury)	$1,809,834	0.5%	Rank history: #43 in FY2022, #46 in FY2023, #70 in FY2024 and not on the FY2025 list; up 60 since FY2020.
39	Silverdoor Americas LLC Top agencies DHS (Department of Homeland Security)	$1,808,524	0.5%	Rank history: #40 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
40	Reasor Building Group LLC Top agencies USAF (Department of the Air Force)	$1,753,191	0.5%	Rank history: #23 in FY2022, #36 in FY2023, #26 in FY2024 and #60 in FY2025; down 31 since FY2020.
41	Dawson Enterprises, Inc. Top agencies Navy (Department of the Navy)	$1,733,785	0.5%	Rank history: #84 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
42	Bluewater Management Group LLC Top agencies DHS (Department of Homeland Security)	$1,594,440	0.4%	Rank history: #99 in FY2022, not on the FY2023 list, #27 in FY2024 and #23 in FY2025; up 73 since FY2020.
43	Dsjs Management, LLC Top agencies DHS (Department of Homeland Security)	$1,560,447	0.4%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
44	Swan Contracting LLC Top agencies USAF (Department of the Air Force)	$1,537,749	0.4%	Rank history: not on the FY2022–FY2025 lists; up 20 since FY2020.
45	Kekolu Contracting LLC 2 awardees, including Honu'apo I, LLC Top agencies Navy (Department of the Navy)	$1,462,427	0.4%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
46	WFI Stadium LLC Top agencies Army (Department of the Army)	$1,438,007	0.4%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
47	Environmental, Safety & Health Consulting Services, Inc. Top agencies DHS (Department of Homeland Security)	$1,414,039	0.4%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
48	Coin Wrap Inc. Top agencies Treasury (Department of the Treasury)	$1,369,735	0.4%	Rank history: #53 in FY2022, not on the FY2023 list, #18 in FY2024 and #37 in FY2025; new, not ranked in FY2020.
49	Lockheed Martin Corporation Top agencies Army (Department of the Army)	$1,357,770	0.4%	Rank history: #29 in FY2022, #41 in FY2023, #43 in FY2024 and #84 in FY2025; up 13 since FY2020.
50	Diversity Resources Group LLC Top agencies USAF (Department of the Air Force)	$1,356,531	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Gulf Oil Limited Partnership Through Pike Fuels Limited Partnership Top agencies DOE (Department of Energy)	$1,320,000	0.4%	Rank history: #55 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
52	City of Vinton Top agencies CNCS (Corporation for National and Community Service)	$1,300,387	0.4%	Rank history: #49 in FY2022, #34 in FY2023, #40 in FY2024 and #45 in FY2025; up 13 since FY2020.
53	Savills Inc. Top agencies Treasury (Department of the Treasury)	$1,239,144	0.3%	Rank history: not on the FY2022–FY2025 lists; up 159 since FY2020.
54	Dominion Federal Corporation Top agencies USAF (Department of the Air Force)	$1,223,400	0.3%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
55	Usgbf NSF LLC Top agencies NSF (National Science Foundation)	$1,200,000	0.3%	Rank history: #83 in FY2022, #77 in FY2023, #73 in FY2024 and not on the FY2025 list; up 25 since FY2020.
56	Basic Technologies Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$1,191,161	0.3%	Rank history: not on the FY2022–FY2025 lists; up 83 since FY2020.
57	Crown Castle Fiber LLC 4 awardees, including Pinnacle Towers LLC, Crown Communication Llc. and Crown Castle USA Inc. Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury) DHS (Department of Homeland Security)	$1,144,119	0.3%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
58	State of California Controllers Office 7 awardees, including Regents of the University of California, College of the Law San Francisco and California Department of Food & Agriculture Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) DOJ (Department of Justice)	$1,118,327	0.3%	Rank history: #77 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
59	NCC PS Enterprises, LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,114,649	0.3%	Rank history: not on the FY2022 list, #74 in FY2023, #63 in FY2024 and #58 in FY2025; up 120 since FY2020.
60	6100 Executive LLC Top agencies HHS (Department of Health and Human Services)	$1,002,975	0.3%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
61	Vectrus Systems Corporation Through V2X Systems LLC Top agencies Navy (Department of the Navy)	$916,934	0.3%	Rank history: #63 in FY2022, #67 in FY2023, #31 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
62	Modular Concepts, Inc. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$905,996	0.2%	Rank history: #95 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; down 45 since FY2020.
63	Halcyon Associates, LLC Top agencies HHS (Department of Health and Human Services)	$897,736	0.2%	Rank history: not on the FY2022–FY2025 lists; down 20 since FY2020.
64	Potomac Center North Inc. Top agencies DHS (Department of Homeland Security)	$888,418	0.2%	Rank history: #50 in FY2022, #57 in FY2023, #46 in FY2024 and #53 in FY2025; down 7 since FY2020.
65	Stripes Global, Inc. Top agencies VA (Department of Veterans Affairs)	$872,634	0.2%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
66	Parking Management Inc. Top agencies DOJ (Department of Justice) HHS (Department of Health and Human Services) MSPB (Merit Systems Protection Board)	$864,817	0.2%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
67	Alexandria Real Estate Equities, Inc. Through Are-Maryland No 24 LLC Top agencies HHS (Department of Health and Human Services)	$860,812	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Colonial Parking, Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$859,996	0.2%	Rank history: not on the FY2022–FY2025 lists; down 15 since FY2020.
69	Jemals Springworks LLC	$835,101	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Microhealth LLC Top agencies DOS (Department of State)	$823,717	0.2%	Rank history: #27 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
71	Mittarfeqarfiit A / S Top agencies USAF (Department of the Air Force)	$813,801	0.2%	Rank history: #76 in FY2022, #66 in FY2023, #71 in FY2024 and #73 in FY2025; up 67 since FY2020.
72	Imperial Parking (U.S.) LLC 4 awardees, including City Center Parking and Republic Parking System, LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State) Treasury (Department of the Treasury)	$805,139	0.2%	Rank history: #71 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
73	GRP Silo LLC Top agencies DOT (Department of Transportation)	$796,513	0.2%	Rank history: #58 in FY2022, #76 in FY2023, #80 in FY2024 and not on the FY2025 list; up 73 since FY2020.
74	Premier Parking LLC Top agencies Army (Department of the Army) DOJ (Department of Justice) HHS (Department of Health and Human Services)	$783,028	0.2%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; up 11 since FY2020.
75	Wadsworth Chapel Heritage Partners Top agencies VA (Department of Veterans Affairs)	$782,330	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Asrc Prime Constructors, LLC Top agencies Army (Department of the Army)	$753,883	0.2%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
77	Penn Parking Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) MCC (Millennium Challenge Corporation) DHS (Department of Homeland Security)	$720,272	0.2%	Rank history: #44 in FY2022, #80 in FY2023, #59 in FY2024 and #66 in FY2025; up 5 since FY2020.
78	Datasavers of Jacksonville, Inc. Top agencies Treasury (Department of the Treasury)	$713,873	0.2%	Rank history: not on the FY2022–FY2025 lists; up 28 since FY2020.
79	Cross Rivers LLC Top agencies DHS (Department of Homeland Security)	$706,168	0.2%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
80	Ecology Mir Group LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) DOI (Department of the Interior)	$688,959	0.2%	Rank history: #78 in FY2022, #91 in FY2023, #54 in FY2024 and #90 in FY2025; up 89 since FY2020.
81	Miami Nation Enterpeises Through Miami Wiipica, LLC Top agencies USAF (Department of the Air Force)	$682,245	0.2%	Rank history: #30 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; down 76 since FY2020.
82	Government of the United States 9 awardees, including Fa4877 355 Cons PK, United States Department of the Air Force and Army United States Department of The Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$675,327	0.2%	Rank history: #66 in FY2022, #5 in FY2023, #6 in FY2024 and not on the FY2025 list; up 159 since FY2020.
83	Washington DC IV Fgf, LLC Top agencies Peace Corps	$668,928	0.2%	Rank history: not on the FY2022–FY2025 lists; up 60 since FY2020.
84	Kallman Worldwide Inc. Top agencies DSCA (Defense Security Cooperation Agency)	$667,766	0.2%	Rank history: #81 in FY2022, #43 in FY2023, not on the FY2024 list and #65 in FY2025; new, not ranked in FY2020.
85	Shandy Acres LLC Top agencies DHS (Department of Homeland Security)	$667,200	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Id Fort LLC Top agencies DOJ (Department of Justice)	$643,200	0.2%	Rank history: #64 in FY2022, #84 in FY2023, #68 in FY2024 and #70 in FY2025; up 2 since FY2020.
87	Heritage Interiors LLC Top agencies HHS (Department of Health and Human Services)	$642,133	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	SKE Technical Services GMBH Through SKE SRL Top agencies USAF (Department of the Air Force)	$640,684	0.2%	Rank history: not on the FY2022 list, #94 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
89	Defense Base Services, LLC Top agencies Navy (Department of the Navy)	$632,184	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Michigan State University Top agencies Army (Department of the Army)	$619,590	0.2%	Rank history: not on the FY2022–FY2025 lists; up 40 since FY2020.
91	JBG BC 5640 LP Top agencies HHS (Department of Health and Human Services)	$615,929	0.2%	Rank history: not on the FY2022–FY2025 lists; down 62 since FY2020.
92	Maplewood Place Park, LLC Top agencies DHS (Department of Homeland Security)	$612,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Go & Zalez Inc. Top agencies DHS (Department of Homeland Security)	$605,460	0.2%	Rank history: not on the FY2022–FY2025 lists; up 60 since FY2020.
94	VSS Logistics LLC Top agencies VA (Department of Veterans Affairs)	$605,289	0.2%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
95	Diversified Group L. L. C. Through Dixie Marine Inc. Top agencies DOT (Department of Transportation)	$600,800	0.2%	Rank history: #89 in FY2022, not on the FY2023 list, #78 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
96	1 -800-Agentmatch.com, LLC Top agencies DHS (Department of Homeland Security)	$595,062	0.2%	Rank history: #56 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 92 since FY2020.
97	Williams Scotsman Inc. 3 awardees, including Mobile Mini, Inc. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$593,031	0.2%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
98	Vallandor Properties No 3 LLC Top agencies DHS (Department of Homeland Security)	$591,300	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	LAZ Parking Ltd, LLC Top agencies EOP (Executive Office of the President) DOJ (Department of Justice)	$576,360	0.2%	Rank history: not on the FY2022–FY2024 lists and #82 in FY2025; down 25 since FY2020.
100	Express Transports SA Top agencies DOS (Department of State)	$572,929	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 1,252 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC X

Code	Net obligations	Largest contractor
X1 Lease/Rental of Buildings	$340,204,515	NIH Bayview Acquisition LLC

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 $367 million 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 X contractors in FY2021?

1. NIH Bayview Acquisition LLC ($25.3M), 2. Buckeye Terminals LLC ($19.5M), 3. N.s.p. Ventures Corp. ($16.5M), 4. Fitzhenry-Guptill Holding Company Inc ($14.1M), 5. GI TC Montgomery LLC ($11.2M), 6. Luhr Bros., Inc. ($10.4M), 7. Mosswood Property Development LLC ($7.94M), 8. Franklin Court Inc. ($7.25M), 9. Healthcare Trust of America Inc. ($7M), 10. Global Partners LP ($5.78M).

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