Top 100 Contractors in PSC R604: Mailing and Distribution Services, FY2021

Name: Top 100 Contractors in PSC R604: Mailing and Distribution Services, FY2021
Creator: GovTribe

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

The top 10 won 94% of FY2021 PSC R604 contract dollars

Contract obligations: $1,972,036,340 Net of deobligations, by contracts coded PSC R604
Contractors: 168 Parent companies with an obligation
Largest contractor: Mckesson Corporation $1.49 billion, 74.3% 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	Mckesson Corporation Through Mckesson Specialty Distribution LLC Top agencies HHS (Department of Health and Human Services)	$1,494,718,093	74.3%	Rank history: #1 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
2	Fedex Corp 7 awardees, including Fedex Supply Chain Distribution System, Inc., Federal Express Corporation and Fedex Freight East, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) USAF (Department of the Air Force)	$264,990,533	13.2%	Rank history: #2 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
3	Teamstaff Inc. Through DLH Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$50,910,865	2.5%	Rank history: #3 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 2 since FY2020.
4	Servicesource Inc. 2 awardees Top agencies Treasury (Department of the Treasury) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$36,297,956	1.8%	Rank history: #4 in FY2022, #4 in FY2023, #4 in FY2024 and #5 in FY2025; unchanged since FY2020.
5	United Parcel Service Inc. 4 awardees Top agencies VA (Department of Veterans Affairs) HUD (Department of Housing and Urban Development) DHS (Department of Homeland Security)	$16,797,184	0.8%	Rank history: #5 in FY2022, #3 in FY2023, #3 in FY2024 and #4 in FY2025; up 5 since FY2020.
6	Ipsos Public Affairs, LLC Top agencies VA (Department of Veterans Affairs)	$15,699,672	0.8%	Rank history: #9 in FY2022, #8 in FY2023, #8 in FY2024 and #11 in FY2025; up 1 since FY2020.
7	Intellectus, LLC Top agencies DHS (Department of Homeland Security)	$6,901,437	0.3%	Rank history: #13 in FY2022, #6 in FY2023, not on the FY2024 list and #9 in FY2025; up 10 since FY2020.
8	Didlake Inc. Top agencies DOJ (Department of Justice) Peace Corps HUD (Department of Housing and Urban Development)	$4,720,132	0.2%	Rank history: #21 in FY2022, #14 in FY2023, #11 in FY2024 and #15 in FY2025; up 20 since FY2020.
9	Pitney Bowes Inc. 5 awardees, including The Pitney Bowes Bank. Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$4,706,150	0.2%	Rank history: #10 in FY2022, #12 in FY2023, #7 in FY2024 and #8 in FY2025; up 12 since FY2020.
10	Specpro Management Services, LLC Top agencies DOJ (Department of Justice)	$4,659,602	0.2%	Rank history: #11 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
11	Versability Resources, Inc. Top agencies USAF (Department of the Air Force)	$4,643,385	0.2%	Rank history: #7 in FY2022, #10 in FY2023, #5 in FY2024 and #6 in FY2025; up 5 since FY2020.
12	Extend Your Reach, Inc. Top agencies SBA (Small Business Administration)	$4,563,570	0.2%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
13	United Systems of Arkansas, Inc. Top agencies HHS (Department of Health and Human Services)	$3,893,463	0.2%	Rank history: #8 in FY2022, #11 in FY2023, #9 in FY2024 and #24 in FY2025; unchanged since FY2020.
14	Anthony Wayne Rehabilitation Center for Handicapped & Blind Inc. Top agencies NASA (National Aeronautics and Space Administration) DFAS (Defense Finance and Accounting Service) USAF (Department of the Air Force)	$3,378,185	0.2%	Rank history: #14 in FY2022, #9 in FY2023, #15 in FY2024 and #16 in FY2025; unchanged since FY2020.
15	Kapsuun Group, LLC Top agencies DOS (Department of State)	$2,823,134	0.1%	Rank history: #17 in FY2022, #17 in FY2023, #10 in FY2024 and #47 in FY2025; down 4 since FY2020.
16	Deutsche Post AG 3 awardees, including DHL International B.s.c., DHL Express (Usa), Inc. and DHL Express Argentina SA Top agencies Navy (Department of the Navy) Army (Department of the Army) DOS (Department of State)	$2,443,705	0.1%	Rank history: #24 in FY2022, #22 in FY2023, #48 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
17	Nobis Enterprises, Inc. Top agencies HUD (Department of Housing and Urban Development) EPA (Environmental Protection Agency) SSA (Social Security Administration)	$2,409,973	0.1%	Rank history: #15 in FY2022, #15 in FY2023, #12 in FY2024 and #13 in FY2025; up 3 since FY2020.
18	Chickasaw Business Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$2,366,111	0.1%	Rank history: #18 in FY2022, #19 in FY2023, #19 in FY2024 and #18 in FY2025; new, not ranked in FY2020.
19	Chickasaw Health Consulting, LLC Top agencies HHS (Department of Health and Human Services)	$1,738,879	0.1%	Rank history: #19 in FY2022, #23 in FY2023, #20 in FY2024 and not on the FY2025 list; up 12 since FY2020.
20	Industries for the Blind and Visually Impaired, Inc. Top agencies DHS (Department of Homeland Security)	$1,684,327	0.1%	Rank history: not on the FY2022 list, #20 in FY2023, #18 in FY2024 and #61 in FY2025; up 3 since FY2020.
21	Huntsville Rehabilitation Foundation Top agencies MDA (DOD Missile Defense Agency)	$1,460,012	0.1%	Rank history: #29 in FY2022, #25 in FY2023, #22 in FY2024 and #25 in FY2025; up 13 since FY2020.
22	Strativia LLC Top agencies Commerce (Department of Commerce) EXIM (Export Import Bank of the US)	$1,405,304	0.1%	Rank history: #20 in FY2022, #21 in FY2023, #17 in FY2024 and #23 in FY2025; up 20 since FY2020.
23	Inspiritec Inc. Top agencies Army (Department of the Army)	$1,370,068	0.1%	Rank history: #6 in FY2022, #7 in FY2023, #6 in FY2024 and #7 in FY2025; down 14 since FY2020.
24	Anchor Mental Health Association Inc. Top agencies DOI (Department of the Interior)	$1,351,904	0.1%	Rank history: #31 in FY2022, #28 in FY2023, #27 in FY2024 and #26 in FY2025; up 8 since FY2020.
25	Falon Sourcing Solutions LLC Top agencies SSA (Social Security Administration) Commerce (Department of Commerce) DHS (Department of Homeland Security)	$1,345,658	0.1%	Rank history: #25 in FY2022, #51 in FY2023, #61 in FY2024 and #63 in FY2025; down 1 since FY2020.
26	ILM Corporation of Virginia Inc. Top agencies DHS (Department of Homeland Security)	$1,316,543	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	Melwood Horticultural Training Center, Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) Treasury (Department of the Treasury)	$1,311,703	0.1%	Rank history: #16 in FY2022, #18 in FY2023, #14 in FY2024 and #20 in FY2025; up 2 since FY2020.
28	Riva Solutions Inc. Top agencies DOT (Department of Transportation) USITC (International Trade Commission)	$1,268,173	0.1%	Rank history: #22 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
29	Syscom, Inc. Top agencies DOJ (Department of Justice)	$1,085,572	0.1%	Rank history: #75 in FY2022, #30 in FY2023, #30 in FY2024 and #17 in FY2025; up 6 since FY2020.
30	Data Federal Corporation Top agencies HHS (Department of Health and Human Services)	$1,010,308	0.1%	Rank history: #71 in FY2022, not on the FY2023 list, #98 in FY2024 and not on the FY2025 list; down 3 since FY2020.
31	Newview Oklahoma, Inc. Top agencies CFPB (Consumer Financial Protection Bureau) Army (Department of the Army)	$993,268	<0.1%	Rank history: #32 in FY2022, #37 in FY2023, #29 in FY2024 and #46 in FY2025; up 56 since FY2020.
32	Mckesson Specialty Distribution LLC Top agencies HHS (Department of Health and Human Services)	$875,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Brightkey, Inc. Top agencies FCC (Federal Communications Commission)	$823,121	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
34	Linden Resources, Inc. Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$811,040	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
35	Allison Payment Systems LLC Top agencies DHS (Department of Homeland Security)	$807,067	<0.1%	Rank history: #63 in FY2022, #24 in FY2023, #16 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
36	Metro Techies LLC Top agencies ED (Department of Education)	$803,841	<0.1%	Rank history: #35 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; unchanged since FY2020.
37	Legacy Management Solutions LLC Top agencies Army (Department of the Army)	$800,698	<0.1%	Rank history: #34 in FY2022, not on the FY2023 list, #36 in FY2024 and #52 in FY2025; up 18 since FY2020.
38	Stamps.COM Inc. 2 awardees, including Auctane, Inc. and P.s.i. Systems, Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) DOL (Department of Labor)	$789,283	<0.1%	Rank history: #30 in FY2022, #57 in FY2023, #47 in FY2024 and #54 in FY2025; down 8 since FY2020.
39	Odrg CSI JV, LLC Top agencies USAID (US Agency for International Development)	$788,290	<0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
40	Postal Strategy Consulting LLC Top agencies VA (Department of Veterans Affairs)	$783,594	<0.1%	Rank history: #33 in FY2022, #31 in FY2023, #28 in FY2024 and #30 in FY2025; new, not ranked in FY2020.
41	JYG Innovations LLC Top agencies EPA (Environmental Protection Agency)	$680,000	<0.1%	Rank history: #37 in FY2022, #36 in FY2023, #41 in FY2024 and not on the FY2025 list; up 29 since FY2020.
42	Corporate Mailing Services, Inc. Top agencies OPM (Office of Personnel Management)	$630,139	<0.1%	Rank history: #36 in FY2022, #32 in FY2023, #23 in FY2024 and #12 in FY2025; up 100 since FY2020.
43	Integrative Sciences LLC Top agencies DOL (Department of Labor)	$590,030	<0.1%	Rank history: #48 in FY2022, #38 in FY2023, #35 in FY2024 and #37 in FY2025; up 8 since FY2020.
44	Bloomsburie LLC Top agencies Navy (Department of the Navy)	$568,684	<0.1%	Rank history: #39 in FY2022, #39 in FY2023, #34 in FY2024 and #34 in FY2025; up 5 since FY2020.
45	Pacific Coast Community Services Top agencies HUD (Department of Housing and Urban Development)	$566,951	<0.1%	Rank history: #42 in FY2022, #65 in FY2023, #46 in FY2024 and #44 in FY2025; up 1 since FY2020.
46	United States Postal Service 4 awardees Top agencies HHS (Department of Health and Human Services) OPM (Office of Personnel Management) VA (Department of Veterans Affairs)	$542,535	<0.1%	Rank history: #83 in FY2022, not on the FY2023 list, #78 in FY2024 and not on the FY2025 list; down 3 since FY2020.
47	CES Mail Communications Inc. Top agencies VA (Department of Veterans Affairs)	$526,180	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Palmetto Goodwill Top agencies USAF (Department of the Air Force)	$510,685	<0.1%	Rank history: #40 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
49	Global Connections To Employment, Inc. Top agencies USAF (Department of the Air Force)	$503,532	<0.1%	Rank history: #28 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	T47 International, Inc. Top agencies Navy (Department of the Navy)	$488,542	<0.1%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
51	OE Enterprises Inc. Top agencies HHS (Department of Health and Human Services)	$484,302	<0.1%	Rank history: #45 in FY2022, #43 in FY2023, #42 in FY2024 and #56 in FY2025; down 1 since FY2020.
52	Mail Management Services, LLC Top agencies VA (Department of Veterans Affairs)	$461,916	<0.1%	Rank history: #46 in FY2022, #35 in FY2023, #57 in FY2024 and #39 in FY2025; new, not ranked in FY2020.
53	Warren County Association for Retarded Citizens, Inc. Top agencies Army (Department of the Army)	$439,264	<0.1%	Rank history: #77 in FY2022, #44 in FY2023, #44 in FY2024 and #42 in FY2025; up 1 since FY2020.
54	Management Support Technology, Incorporated Top agencies USSOCOM (United States Special Operations Command) VA (Department of Veterans Affairs)	$413,657	<0.1%	Rank history: #50 in FY2022, #48 in FY2023, #64 in FY2024 and #60 in FY2025; up 3 since FY2020.
55	Xerox Holdings Corp Through Xerox Corporation Top agencies VA (Department of Veterans Affairs)	$409,472	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	Clancyjg International Top agencies USAF (Department of the Air Force)	$403,126	<0.1%	Rank history: #51 in FY2022, #49 in FY2023, #63 in FY2024 and not on the FY2025 list; up 5 since FY2020.
57	Goodwill Industries of South Mississippi, Inc. Through Mississippi Goodworks Inc. Top agencies USAF (Department of the Air Force)	$394,065	<0.1%	Rank history: #49 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
58	24 / 7 Enterprises, LLC Top agencies USAF (Department of the Air Force)	$391,090	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
59	Crawford Technologies USA Inc. Top agencies HHS (Department of Health and Human Services)	$377,106	<0.1%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
60	Bobby Dodd Institute, Inc. Top agencies DOT (Department of Transportation)	$373,378	<0.1%	Rank history: #61 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
61	Immediate Mailing Services, Inc. Top agencies SSA (Social Security Administration)	$372,750	<0.1%	Rank history: #53 in FY2022, #63 in FY2023, #92 in FY2024 and not on the FY2025 list; down 23 since FY2020.
62	Hagerstown Goodwill Industries, Inc. Top agencies Treasury (Department of the Treasury)	$365,485	<0.1%	Rank history: #57 in FY2022, #54 in FY2023, #52 in FY2024 and #33 in FY2025; down 14 since FY2020.
63	Government Support Services JV, LLC Top agencies Army (Department of the Army)	$356,922	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Nextrinsic Corp Top agencies Army (Department of the Army)	$331,722	<0.1%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; up 36 since FY2020.
65	Sunplus Data Group, Inc. Top agencies SEC (Securities and Exchange Commission) GAO (Government Accountability Office)	$331,472	<0.1%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 24 since FY2020.
66	GW Commercial Services Inc. Top agencies DHS (Department of Homeland Security)	$325,270	<0.1%	Rank history: #62 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
67	MEI Mail Services Inc. Top agencies DHS (Department of Homeland Security) DOT (Department of Transportation)	$308,666	<0.1%	Rank history: not on the FY2022–FY2023 lists, #91 in FY2024 and #93 in FY2025; up 7 since FY2020.
68	Fora Pathways, Inc. Top agencies DHS (Department of Homeland Security)	$308,472	<0.1%	Rank history: #27 in FY2022, #29 in FY2023, #25 in FY2024 and #29 in FY2025; up 7 since FY2020.
69	The Arc of the District of Columbia Inc. Top agencies USDA (Department of Agriculture)	$308,153	<0.1%	Rank history: #66 in FY2022, #61 in FY2023, #58 in FY2024 and not on the FY2025 list; down 2 since FY2020.
70	Neopost SA 3 awardees, including Quadient, Inc., Quadient Finance USA Inc. and Mailfinance Inc. Top agencies VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$308,028	<0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
71	Wilson Technologies, Inc. Top agencies CFPB (Consumer Financial Protection Bureau) SSA (Social Security Administration)	$303,290	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
72	Federal Express Corporation 2 awardees Top agencies DOT (Department of Transportation) DOJ (Department of Justice) Commerce (Department of Commerce)	$282,146	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 46 since FY2020.
73	Vital Management and Engineering Inc. Top agencies HHS (Department of Health and Human Services)	$278,186	<0.1%	Rank history: #26 in FY2022, #27 in FY2023, #33 in FY2024 and #50 in FY2025; new, not ranked in FY2020.
74	Work Inc. Top agencies EPA (Environmental Protection Agency)	$270,229	<0.1%	Rank history: #60 in FY2022, #52 in FY2023, #62 in FY2024 and #48 in FY2025; down 30 since FY2020.
75	Certified Mailing Solutions Inc. Top agencies HUD (Department of Housing and Urban Development)	$260,000	<0.1%	Rank history: #68 in FY2022, #77 in FY2023, #89 in FY2024 and #91 in FY2025; up 2 since FY2020.
76	Employment Source Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$258,559	<0.1%	Rank history: #43 in FY2022, #42 in FY2023, #39 in FY2024 and #64 in FY2025; new, not ranked in FY2020.
77	CTR Management Group LLC Top agencies USDA (Department of Agriculture)	$250,127	<0.1%	Rank history: #72 in FY2022, #71 in FY2023, #65 in FY2024 and #65 in FY2025; up 6 since FY2020.
78	Assets Inc. Top agencies USAF (Department of the Air Force)	$247,622	<0.1%	Rank history: #65 in FY2022, #66 in FY2023, #59 in FY2024 and #58 in FY2025; up 3 since FY2020.
79	Pillow Express Delivery, Inc. Top agencies AFRH (Armed Forces Retirement Home) Treasury (Department of the Treasury)	$245,694	<0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
80	Saints Transport Limited Top agencies USAF (Department of the Air Force)	$241,598	<0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
81	Shipping, Receiving, Fulfillment Services, Inc. Top agencies HHS (Department of Health and Human Services)	$229,307	<0.1%	Rank history: #76 in FY2022, #67 in FY2023, #56 in FY2024 and #67 in FY2025; up 9 since FY2020.
82	Allied Services Foundation Through Burnley Workshop of Poconos Inc. Top agencies Army (Department of the Army)	$219,812	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Goodworks, Inc. Top agencies Army (Department of the Army)	$214,038	<0.1%	Rank history: #85 in FY2022, #75 in FY2023, #66 in FY2024 and #71 in FY2025; up 3 since FY2020.
84	Nysarc Inc. Top agencies VA (Department of Veterans Affairs)	$199,633	<0.1%	Rank history: #86 in FY2022, #74 in FY2023, #71 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
85	The Arc of the Quad Cities Area Top agencies Army (Department of the Army)	$199,455	<0.1%	Rank history: #79 in FY2022, #73 in FY2023, #55 in FY2024 and #92 in FY2025; up 19 since FY2020.
86	Lakeview Center Inc. Top agencies USAF (Department of the Air Force)	$193,549	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
87	Express Business Systems Inc. Top agencies SSA (Social Security Administration)	$193,516	<0.1%	Rank history: #67 in FY2022, #85 in FY2023, #53 in FY2024 and #51 in FY2025; down 11 since FY2020.
88	E-9 Enterprises, LLC Top agencies USAF (Department of the Air Force)	$188,220	<0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
89	Tasks Unlimited Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$171,196	<0.1%	Rank history: #90 in FY2022, #86 in FY2023, not on the FY2024 list and #86 in FY2025; up 5 since FY2020.
90	Fedcap Rehabilitation Services, Inc. Through Community Workshops, Inc. Top agencies Army (Department of the Army)	$164,569	<0.1%	Rank history: #99 in FY2022, not on the FY2023 list, #82 in FY2024 and not on the FY2025 list; up 33 since FY2020.
91	Infinisource Consulting Solutions, Inc. Top agencies Army (Department of the Army)	$162,715	<0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
92	Easterseals Capital Region & Eastern Connecticut, Inc. Top agencies DHS (Department of Homeland Security)	$159,464	<0.1%	Rank history: not on the FY2022 list, #89 in FY2023, #49 in FY2024 and #66 in FY2025; up 5 since FY2020.
93	Minot Vocational Adjustment Workshop 2 awardees, including MVW Services Inc. Top agencies USAF (Department of the Air Force)	$155,139	<0.1%	Rank history: #92 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
94	Ebits Corp Top agencies HUD (Department of Housing and Urban Development)	$155,108	<0.1%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
95	ADA S. Mckinley Community Services, Inc. Top agencies HUD (Department of Housing and Urban Development)	$154,000	<0.1%	Rank history: #97 in FY2022, #87 in FY2023, #76 in FY2024 and #76 in FY2025; up 3 since FY2020.
96	Professional Management Consulting Services LLC Top agencies NRC (Nuclear Regulatory Commission)	$153,649	<0.1%	Rank history: #52 in FY2022, #47 in FY2023, #45 in FY2024 and #53 in FY2025; down 49 since FY2020.
97	Synergy America, Inc. Top agencies USAF (Department of the Air Force)	$149,722	<0.1%	Rank history: #93 in FY2022, #84 in FY2023, #79 in FY2024 and #79 in FY2025; up 6 since FY2020.
98	Atlas Air Worldwide Holdings Inc. Through Polar Air Cargo Worldwide, Inc. Top agencies DOS (Department of State) Commerce (Department of Commerce) GSA (General Services Administration)	$148,895	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 56 since FY2020.
99	Bankers Business Management Services, Inc. Top agencies USDA (Department of Agriculture) GAO (Government Accountability Office)	$132,354	<0.1%	Rank history: #95 in FY2022, #82 in FY2023, #75 in FY2024 and #21 in FY2025; up 56 since FY2020.
100	Ycona SRL Top agencies Army (Department of the Army)	$129,650	<0.1%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.

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100 of 168 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 $2.01 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 R604 contractors in FY2021?

1. Mckesson Corporation ($1.49B), 2. Fedex Corp ($265M), 3. Teamstaff Inc. ($50.9M), 4. Servicesource Inc. ($36.3M), 5. United Parcel Service Inc. ($16.8M), 6. Ipsos Public Affairs, LLC ($15.7M), 7. Intellectus, LLC ($6.9M), 8. Didlake Inc. ($4.72M), 9. Pitney Bowes Inc. ($4.71M), 10. Specpro Management Services, LLC ($4.66M).

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