Top 100 Contractors in NAICS 5311: Lessors of Real Estate, FY2021

Name: Top 100 Contractors in NAICS 5311: Lessors of Real Estate, FY2021
Creator: GovTribe

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

The top 10 won 41% of FY2021 NAICS 5311 contract dollars

Contract obligations: $217,052,089 Net of deobligations, by contracts coded NAICS 5311 or a code under it
Contractors: 627 Parent companies with an obligation
Largest contractor: NIH Bayview Acquisition LLC $25.3 million, 10.6% 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	10.6%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
2	N.s.p. Ventures Corp. Top agencies Treasury (Department of the Treasury)	$16,414,479	6.9%	Rank history: #3 in FY2022, #4 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
3	GI TC Montgomery LLC Top agencies HHS (Department of Health and Human Services)	$11,211,550	4.7%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
4	DMC Management Services, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$10,870,207	4.5%	Rank history: #4 in FY2022, #7 in FY2023, #5 in FY2024 and #5 in FY2025; up 5 since FY2020.
5	Franklin Court Inc. Top agencies MCC (Millennium Challenge Corporation)	$7,247,759	3.0%	Rank history: #10 in FY2022, #10 in FY2023, not on the FY2024 list and #12 in FY2025; up 7 since FY2020.
6	Healthcare Trust of America Inc. Through HTA - Triad, LLC Top agencies HHS (Department of Health and Human Services)	$6,998,895	2.9%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
7	Ma-Chis International Services, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$5,414,774	2.3%	Rank history: #6 in FY2022, #8 in FY2023, #4 in FY2024 and #6 in FY2025; up 44 since FY2020.
8	Jbg/ BC Fishers 1, LP Top agencies HHS (Department of Health and Human Services)	$5,389,921	2.3%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
9	Empire Hospitality LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$5,151,324	2.2%	Rank history: #5 in FY2022, #19 in FY2023, #49 in FY2024 and not on the FY2025 list; up 18 since FY2020.
10	WSC / 6001 LLC Top agencies HHS (Department of Health and Human Services)	$5,020,637	2.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
11	Active Deployment Systems, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$4,822,774	2.0%	Rank history: #12 in FY2022, #5 in FY2023, #9 in FY2024 and not on the FY2025 list; unchanged since FY2020.
12	Mcgrath Rentcorp 2 awardees, including Design Space Modular Buildings Pnw, LP Top agencies DOI (Department of the Interior) DHS (Department of Homeland Security) USDA (Department of Agriculture)	$4,539,670	1.9%	Rank history: #45 in FY2022, #38 in FY2023, #38 in FY2024 and #63 in FY2025; up 38 since FY2020.
13	PCI Support Services LLC Top agencies Navy (Department of the Navy)	$4,421,770	1.8%	Rank history: #11 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
14	5600 Fishers Lane LLC Top agencies HHS (Department of Health and Human Services)	$4,205,836	1.8%	Rank history: #15 in FY2022, #13 in FY2023, #11 in FY2024 and #17 in FY2025; up 3 since FY2020.
15	Environmental Chemical Corporation Top agencies Navy (Department of the Navy)	$4,026,085	1.7%	Rank history: #13 in FY2022, #14 in FY2023, #15 in FY2024 and #21 in FY2025; up 3 since FY2020.
16	Hunter Saak Investments, LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$3,915,857	1.6%	Rank history: #26 in FY2022, #39 in FY2023, #53 in FY2024 and #75 in FY2025; up 19 since FY2020.
17	Usgbf Nci, LLC Top agencies HHS (Department of Health and Human Services)	$3,290,890	1.4%	Rank history: #18 in FY2022, #17 in FY2023, #13 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
18	Aktio Corporation Top agencies Navy (Department of the Navy)	$2,828,494	1.2%	Rank history: #28 in FY2022, #59 in FY2023, #28 in FY2024 and #25 in FY2025; up 53 since FY2020.
19	Ecology Mir Group LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,826,035	1.2%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 201 since FY2020.
20	Swan Contracting LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,608,352	1.1%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
21	DFW Lakes Hotel Opco, LLC Top agencies DHS (Department of Homeland Security)	$2,591,392	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	Oxford Vista LLC Top agencies CNCS (Corporation for National and Community Service)	$2,450,076	1.0%	Rank history: #23 in FY2022, #20 in FY2023, #21 in FY2024 and #13 in FY2025; up 16 since FY2020.
23	Integrated Modular Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) USSOCOM (United States Special Operations Command)	$2,383,688	1.0%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; down 15 since FY2020.
24	Mcclellan Business Park LLC Top agencies CNCS (Corporation for National and Community Service)	$2,339,155	1.0%	Rank history: #30 in FY2022, #26 in FY2023, #19 in FY2024 and #23 in FY2025; up 4 since FY2020.
25	Oxford Bit Gallery Place Property Owner LLC	$2,326,836	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	All Saints Episcopal School Top agencies CNCS (Corporation for National and Community Service)	$2,214,125	0.9%	Rank history: #36 in FY2022, #30 in FY2023, #31 in FY2024 and #31 in FY2025; up 14 since FY2020.
27	Reasor Building Group LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,149,019	0.9%	Rank history: #17 in FY2022, #28 in FY2023, #18 in FY2024 and #39 in FY2025; down 21 since FY2020.
28	Oregon Premier Locations, LLC Top agencies USAF (Department of the Air Force) USUHS (DOD Uniformed Services University of the Health Sciences) VA (Department of Veterans Affairs)	$2,125,995	0.9%	Rank history: #19 in FY2022, #18 in FY2023, #16 in FY2024 and #26 in FY2025; up 26 since FY2020.
29	Creative It Solutions LLC Top agencies Navy (Department of the Navy)	$2,014,983	0.8%	Rank history: #24 in FY2022, #32 in FY2023, #8 in FY2024 and #72 in FY2025; down 5 since FY2020.
30	Keystone 530 TT, LLC Top agencies HHS (Department of Health and Human Services)	$1,988,822	0.8%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
31	Modular Concepts, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,906,860	0.8%	Rank history: #31 in FY2022, #37 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
32	Madison Hospitality Services, LLC Top agencies DHS (Department of Homeland Security) Commerce (Department of Commerce) USUHS (DOD Uniformed Services University of the Health Sciences)	$1,549,129	0.6%	Rank history: #40 in FY2022, #11 in FY2023, #12 in FY2024 and #9 in FY2025; up 2 since FY2020.
33	A C Blount Concrete Service Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,488,804	0.6%	Rank history: #54 in FY2022, #36 in FY2023, #59 in FY2024 and #57 in FY2025; down 3 since FY2020.
34	Kekolu Contracting LLC 2 awardees, including Honu'apo I, LLC Top agencies Navy (Department of the Navy)	$1,462,427	0.6%	Rank history: #35 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
35	Diversity Resources Group LLC Top agencies USAF (Department of the Air Force)	$1,356,531	0.6%	Rank history: not on the FY2022 list, #90 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
36	City of Vinton Top agencies CNCS (Corporation for National and Community Service)	$1,300,387	0.5%	Rank history: #37 in FY2022, #27 in FY2023, #25 in FY2024 and #30 in FY2025; up 11 since FY2020.
37	Dominion Federal Corporation Top agencies USAF (Department of the Air Force)	$1,223,400	0.5%	Rank history: #27 in FY2022, #22 in FY2023, #27 in FY2024 and #29 in FY2025; up 6 since FY2020.
38	Progressive Innovative Concepts, Inc (Picinc) Top agencies Navy (Department of the Navy)	$1,076,320	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	6100 Executive LLC Top agencies HHS (Department of Health and Human Services)	$1,002,975	0.4%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
40	Cuna Supply LLC Top agencies VA (Department of Veterans Affairs)	$967,343	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Halcyon Associates, LLC Top agencies HHS (Department of Health and Human Services)	$897,736	0.4%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
42	Kwikspace Guam Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$894,984	0.4%	Rank history: #57 in FY2022, #24 in FY2023, #17 in FY2024 and #18 in FY2025; unchanged since FY2020.
43	New London Hospitality, LLC Top agencies Navy (Department of the Navy)	$885,913	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	Usgbf NSF LLC Top agencies NSF (National Science Foundation)	$867,874	0.4%	Rank history: #51 in FY2022, #50 in FY2023, #42 in FY2024 and not on the FY2025 list; up 4 since FY2020.
45	Sterling Park Parcel 12 LLC Top agencies DOJ (Department of Justice)	$865,375	0.4%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 27 since FY2020.
46	Alexandria Real Estate Equities, Inc. Through Are-Maryland No 24 LLC Top agencies HHS (Department of Health and Human Services)	$860,812	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Jemals Springworks LLC	$835,101	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	JEL Management LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture) USAF (Department of the Air Force)	$793,158	0.3%	Rank history: #43 in FY2022, #77 in FY2023, #80 in FY2024 and #81 in FY2025; down 16 since FY2020.
49	Bluewater Management Group LLC Top agencies VA (Department of Veterans Affairs)	$757,515	0.3%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
50	Crewfacilities.com, LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$727,582	0.3%	Rank history: #50 in FY2022, #60 in FY2023, #30 in FY2024 and #27 in FY2025; new, not ranked in FY2020.
51	American Tower Corporation 15 awardees, including American Towers LLC, American Tower Management LLC and GTP Acquisition Partners II, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) DOJ (Department of Justice)	$713,107	0.3%	Rank history: #60 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
52	Design Space Modular Buildings Pnw, LP Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) USDA (Department of Agriculture)	$689,155	0.3%	Rank history: not on the FY2022–FY2025 lists; down 33 since FY2020.
53	Miami Nation Enterpeises Through Miami Wiipica, LLC Top agencies USAF (Department of the Air Force)	$682,245	0.3%	Rank history: #22 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; down 50 since FY2020.
54	Shandy Acres LLC Top agencies DHS (Department of Homeland Security)	$667,200	0.3%	Rank history: #99 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Two Independence Hana OW, LLC Top agencies NASA (National Aeronautics and Space Administration)	$645,360	0.3%	Rank history: #52 in FY2022, #40 in FY2023, #23 in FY2024 and #82 in FY2025; down 6 since FY2020.
56	SKE Technical Services GMBH Through SKE SRL Top agencies USAF (Department of the Air Force)	$640,684	0.3%	Rank history: #77 in FY2022, #55 in FY2023, #84 in FY2024 and not on the FY2025 list; up 219 since FY2020.
57	Metro Office Management, Inc. Top agencies VA (Department of Veterans Affairs)	$622,685	0.3%	Rank history: not on the FY2022–FY2025 lists; down 37 since FY2020.
58	Michigan State University Top agencies Army (Department of the Army)	$619,590	0.3%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
59	Sustainable Modular Management, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOI (Department of the Interior)	$619,480	0.3%	Rank history: #21 in FY2022, #42 in FY2023, not on the FY2024 list and #67 in FY2025; up 9 since FY2020.
60	JBG BC 5640 LP Top agencies HHS (Department of Health and Human Services)	$615,929	0.3%	Rank history: not on the FY2022–FY2025 lists; down 34 since FY2020.
61	Candi Thomas Top agencies Navy (Department of the Navy)	$552,348	0.2%	Rank history: not on the FY2022–FY2023 lists, #71 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
62	Reilly Construction Inc. Top agencies Navy (Department of the Navy)	$528,414	0.2%	Rank history: #63 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
63	Belt Built Contracting, LLC Top agencies Navy (Department of the Navy)	$519,535	0.2%	Rank history: #62 in FY2022, #89 in FY2023 and not on the FY2024–FY2025 lists; down 24 since FY2020.
64	Gonre LLC Top agencies DHS (Department of Homeland Security)	$490,800	0.2%	Rank history: #56 in FY2022, #73 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
65	AL Othman Agricultural Products Andprocessing Co Top agencies Army (Department of the Army)	$462,373	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	White Star 9Th, LLC	$432,130	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Abdullah Rasheed Al Rushaid Real Estate Investment Company Top agencies Army (Department of the Army)	$431,550	0.2%	Rank history: #69 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; down 15 since FY2020.
68	Namsi, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$412,830	0.2%	Rank history: #68 in FY2022, not on the FY2023 list, #70 in FY2024 and #73 in FY2025; up 2 since FY2020.
69	Arabian Homes Co. Ltd. Top agencies Army (Department of the Army)	$392,935	0.2%	Rank history: not on the FY2022 list, #44 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
70	Williams Scotsman Inc. 4 awardees, including Mobile Mini, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$389,492	0.2%	Rank history: #58 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
71	Natives of Kodiak, Incorporated Through Koman Construction, LLC Top agencies USAF (Department of the Air Force)	$381,869	0.2%	Rank history: #33 in FY2022, #47 in FY2023, #67 in FY2024 and not on the FY2025 list; down 58 since FY2020.
72	Boyd Bethesda GSA LLC Top agencies HHS (Department of Health and Human Services)	$367,494	0.2%	Rank history: #73 in FY2022, #76 in FY2023, #77 in FY2024 and not on the FY2025 list; up 6 since FY2020.
73	Pin Oak Community, L.l.c Top agencies DHS (Department of Homeland Security)	$350,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Stratton Securities Inc. Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force)	$350,329	0.1%	Rank history: #14 in FY2022, #12 in FY2023 and not on the FY2024–FY2025 lists; up 129 since FY2020.
75	Nika Corporate Housing LLC Top agencies Navy (Department of the Navy)	$348,381	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	NGP V Parklawn MD LLC Top agencies HHS (Department of Health and Human Services)	$344,102	0.1%	Rank history: #75 in FY2022, #80 in FY2023, #98 in FY2024 and #94 in FY2025; up 4 since FY2020.
77	Realty Income Corporation 2 awardees, including Tau Ny-Nj, LLC and Tau Central, LLC Top agencies GSA (General Services Administration) DOJ (Department of Justice)	$341,619	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	RV Travel World of Sacramento Top agencies DHS (Department of Homeland Security)	$333,268	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Auburn University Top agencies USDA (Department of Agriculture)	$325,912	0.1%	Rank history: not on the FY2022 list, #35 in FY2023, #57 in FY2024 and #66 in FY2025; down 6 since FY2020.
80	The Atchison Group, Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$319,985	0.1%	Rank history: #44 in FY2022, #49 in FY2023, #63 in FY2024 and not on the FY2025 list; up 14 since FY2020.
81	Port Authority of New York & New Jersey Top agencies DOS (Department of State)	$315,207	0.1%	Rank history: not on the FY2022–FY2025 lists; up 148 since FY2020.
82	Battle Creek Construction LLC Top agencies Navy (Department of the Navy)	$294,214	0.1%	Rank history: #78 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
83	Bethesda Place Limited Partnership Top agencies HHS (Department of Health and Human Services)	$281,076	0.1%	Rank history: not on the FY2022–FY2025 lists; up 150 since FY2020.
84	College of Southern Maryland Top agencies Navy (Department of the Navy)	$279,855	0.1%	Rank history: #72 in FY2022, not on the FY2023 list, #73 in FY2024 and #95 in FY2025; new, not ranked in FY2020.
85	Bernstein Management Corporation	$278,707	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Jemal's Ballpark, LLC	$273,384	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Exclusive Tent Rentals, Inc. Top agencies Army (Department of the Army)	$270,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Blue Trident - Newton JV Top agencies Navy (Department of the Navy)	$266,618	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
89	Are-Maryland No 24 LLC Top agencies HHS (Department of Health and Human Services)	$262,403	0.1%	Rank history: not on the FY2022–FY2025 lists; down 45 since FY2020.
90	Nambe Pueblo Healthcare Services, LLC Top agencies USAF (Department of the Air Force)	$260,916	0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
91	SBA Communications Corporation 8 awardees, including SBA Structures, LLC, SBA Towers LLC and SBA Towers II LLC Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) Treasury (Department of the Treasury)	$256,155	0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 70 since FY2020.
92	Cross Rivers LLC Top agencies DHS (Department of Homeland Security)	$252,928	0.1%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
93	Jamco Ventures LLC Top agencies Army (Department of the Army)	$252,418	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Guardian Centers of Georgia, LLC Top agencies DHS (Department of Homeland Security)	$247,722	0.1%	Rank history: #70 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; down 8 since FY2020.
95	Royal Restrooms of California Inc. Top agencies DHS (Department of Homeland Security)	$246,760	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
96	Landscape Management Systems, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$245,462	0.1%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
97	BSE Performance, LLC Top agencies USAF (Department of the Air Force)	$245,343	0.1%	Rank history: not on the FY2022–FY2025 lists; up 49 since FY2020.
98	Aviam Corporate Housing, Ltd. Top agencies DHS (Department of Homeland Security)	$244,678	0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
99	Hawaiian Native Corporation Through Dawson Federal, Inc. Top agencies Navy (Department of the Navy)	$242,787	0.1%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
100	Folsom, LLC Top agencies USAF (Department of the Air Force)	$241,376	0.1%	Rank history: #85 in FY2022, #100 in FY2023, #75 in FY2024 and #89 in FY2025; down 59 since FY2020.

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100 of 627 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 5311

Code	Net obligations	Largest contractor
53112 Lessors of Nonresidential Buildings (except Miniwarehouses)	$150,431,036	NIH Bayview Acquisition LLC
53111 Lessors of Residential Buildings and Dwellings	$34,234,249	DMC Management Services, LLC
53119 Lessors of Other Real Estate Property	$30,240,695	N.s.p. Ventures Corp.
53113 Lessors of Miniwarehouses and Self-Storage Units	$2,146,109	Cuna Supply 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 $239 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 NAICS 5311 contractors in FY2021?

1. NIH Bayview Acquisition LLC ($25.3M), 2. N.s.p. Ventures Corp. ($16.4M), 3. GI TC Montgomery LLC ($11.2M), 4. DMC Management Services, LLC ($10.9M), 5. Franklin Court Inc. ($7.25M), 6. Healthcare Trust of America Inc. ($7M), 7. Ma-Chis International Services, Inc. ($5.41M), 8. Jbg/ BC Fishers 1, LP ($5.39M), 9. Empire Hospitality LLC ($5.15M), 10. WSC / 6001 LLC ($5.02M).

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