Top 100 Contractors in NAICS 511199: All Other Publishers, FY2021

Name: Top 100 Contractors in NAICS 511199: All Other Publishers, FY2021
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 86% of FY2021 NAICS 511199 contract dollars

Contract obligations: $603,803,141 Net of deobligations, by contracts coded NAICS 511199
Contractors: 122 Parent companies with an obligation
Largest contractor: Fors Marsh Group LLC $207 million, 31.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Fors Marsh Group LLC Top agencies HHS (Department of Health and Human Services)	$206,740,236	31.7%	Rank history: #1 in FY2022, #2 in FY2023, #1 in FY2024 and #6 in FY2025; unchanged since FY2020.
2	Reed Elsevier Inc. 4 awardees, including Reed Technology and Information Services LLC, Elsevier B.V. and Relx Inc. Top agencies Commerce (Department of Commerce) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$175,618,620	26.9%	Rank history: #2 in FY2022, #1 in FY2023, #3 in FY2024 and not on the FY2025 list; unchanged since FY2020.
3	FSC Colorado Holdings Inc. Through FSC Edge Corp. Top agencies Commerce (Department of Commerce)	$56,959,928	8.7%	Rank history: #3 in FY2022, #5 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
4	IQ Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$50,070,279	7.7%	Rank history: #5 in FY2022, #3 in FY2023, #8 in FY2024 and #8 in FY2025; up 2 since FY2020.
5	Hager Sharp, Inc. Top agencies HHS (Department of Health and Human Services)	$19,991,130	3.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
6	Altarum Institute Through Palladian Partners, Inc. Top agencies HHS (Department of Health and Human Services)	$18,986,169	2.9%	Rank history: #4 in FY2022, #4 in FY2023, #7 in FY2024 and #16 in FY2025; down 1 since FY2020.
7	Variq Corporation Top agencies Treasury (Department of the Treasury)	$13,207,438	2.0%	Rank history: #7 in FY2022, #23 in FY2023, not on the FY2024 list and #5 in FY2025; up 3 since FY2020.
8	Betah Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$8,339,374	1.3%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
9	SOLE Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$6,462,100	1.0%	Rank history: #11 in FY2022, not on the FY2023 list, #11 in FY2024 and #7 in FY2025; unchanged since FY2020.
10	Iron Vine Security LLC Top agencies SEC (Securities and Exchange Commission) MCC (Millennium Challenge Corporation) DFC (International Development Finance Corporation)	$5,976,049	0.9%	Rank history: #12 in FY2022, not on the FY2023–FY2024 lists and #10 in FY2025; down 7 since FY2020.
11	Tygart Technology Inc. Top agencies DOJ (Department of Justice) FEC (Federal Election Commission)	$4,628,668	0.7%	Rank history: #6 in FY2022, #6 in FY2023, #6 in FY2024 and #4 in FY2025; down 4 since FY2020.
12	Scientific Consulting Group Inc. Top agencies HHS (Department of Health and Human Services)	$4,296,280	0.7%	Rank history: #10 in FY2022, #14 in FY2023, #12 in FY2024 and #13 in FY2025; unchanged since FY2020.
13	A+ Government Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$3,197,805	0.5%	Rank history: #8 in FY2022, #7 in FY2023, #9 in FY2024 and not on the FY2025 list; up 1 since FY2020.
14	The Change Companies Top agencies DOJ (Department of Justice)	$3,139,744	0.5%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 29 since FY2020.
15	Ginia Inc. Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture)	$3,013,739	0.5%	Rank history: #14 in FY2022, #16 in FY2023, #10 in FY2024 and #9 in FY2025; up 1 since FY2020.
16	Executech Strategic Consulting, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$2,627,365	0.4%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
17	Lumina Corps Inc. Top agencies HHS (Department of Health and Human Services)	$2,620,900	0.4%	Rank history: #13 in FY2022, #15 in FY2023, #19 in FY2024 and not on the FY2025 list; down 4 since FY2020.
18	Prenax Inc. Top agencies HHS (Department of Health and Human Services) DLA (Defense Logistics Agency)	$2,390,611	0.4%	Rank history: #91 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
19	Accenture Federal Services LLC Through Phase One Consulting Group, LLC Top agencies DOS (Department of State) SSA (Social Security Administration)	$2,295,391	0.4%	Rank history: not on the FY2022–FY2025 lists; down 11 since FY2020.
20	Coggins International Corp Top agencies DLA (Defense Logistics Agency)	$1,501,016	0.2%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
21	Digital Science & Research Solutions Inc. 2 awardees, including Springer Nature Customer Service Center LLC and Biomed Central Limited Top agencies USDA (Department of Agriculture) Navy (Department of the Navy) DOE (Department of Energy)	$1,229,096	0.2%	Rank history: #15 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
22	Tansey Timothy N Top agencies DOJ (Department of Justice)	$1,055,000	0.2%	Rank history: #29 in FY2022, not on the FY2023 list, #22 in FY2024 and #20 in FY2025; new, not ranked in FY2020.
23	Scholastic Corporation Top agencies HHS (Department of Health and Human Services)	$767,846	0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
24	Hendall Inc. Top agencies HHS (Department of Health and Human Services)	$666,406	0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
25	Thomson Reuters (Tax & Accounting) Inc. Through West Publishing Corporation Top agencies FMSHRC (Federal Mine Safety and Health Review Commission) SEC (Securities and Exchange Commission) MSPB (Merit Systems Protection Board)	$451,199	0.1%	Rank history: #22 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2020.
26	The Canton Group Limited Liability Company Top agencies DOT (Department of Transportation)	$448,594	0.1%	Rank history: #33 in FY2022, #30 in FY2023, #23 in FY2024 and #18 in FY2025; new, not ranked in FY2020.
27	Aquitas Solutions, LLC Top agencies Navy (Department of the Navy)	$430,239	0.1%	Rank history: not on the FY2022 list, #20 in FY2023, #13 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
28	Cox Subscriptions, Inc. Top agencies HHS (Department of Health and Human Services) EPA (Environmental Protection Agency)	$429,810	0.1%	Rank history: #19 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
29	Wolters Kluwer N.V. 2 awardees, including CCH Incorporated and Ovid Technologies, Inc. Top agencies SEC (Securities and Exchange Commission) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$419,077	0.1%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
30	Bloomberg LP Through Bloomberg Industry Group, Inc. Top agencies EEOC (Equal Employment Opportunity Commission) NASA (National Aeronautics and Space Administration)	$388,731	0.1%	Rank history: not on the FY2022–FY2025 lists; down 2 since FY2020.
31	Yak-Tat Kwaan Incorporated Through Tecport Solutions Inc. Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$306,858	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
32	New River Systems Corporation Top agencies DOE (Department of Energy) DOS (Department of State)	$291,579	<0.1%	Rank history: #23 in FY2022, #21 in FY2023, #16 in FY2024 and #15 in FY2025; down 6 since FY2020.
33	Intel 471 Inc. Top agencies DHS (Department of Homeland Security)	$275,000	<0.1%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
34	Ti Training Corp Top agencies DOL (Department of Labor) DHS (Department of Homeland Security)	$248,653	<0.1%	Rank history: #45 in FY2022, #34 in FY2023, #26 in FY2024 and #21 in FY2025; up 7 since FY2020.
35	Schatz Publishing Group, LLC Top agencies Army (Department of the Army)	$239,503	<0.1%	Rank history: #30 in FY2022, #27 in FY2023, #20 in FY2024 and not on the FY2025 list; up 1 since FY2020.
36	Association of Schools and Programs of Public Health, Inc. Top agencies HHS (Department of Health and Human Services)	$229,600	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 66 since FY2020.
37	The Hearst Corporation 3 awardees, including Fitch Solutions, Inc. and First Databank, Inc. Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services) DOL (Department of Labor)	$211,828	<0.1%	Rank history: #44 in FY2022, #35 in FY2023, #47 in FY2024 and not on the FY2025 list; down 5 since FY2020.
38	Turn-Key Operations, Incorporated Top agencies DOS (Department of State)	$162,220	<0.1%	Rank history: #58 in FY2022, #36 in FY2023, #36 in FY2024 and #26 in FY2025; up 1 since FY2020.
39	T-System Inc. 2 awardees Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) HHS (Department of Health and Human Services)	$157,184	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
40	Ohm Systems Inc. Top agencies DOJ (Department of Justice)	$155,600	<0.1%	Rank history: #28 in FY2022, #24 in FY2023, #30 in FY2024 and not on the FY2025 list; up 11 since FY2020.
41	BLN LLC Top agencies HHS (Department of Health and Human Services)	$137,875	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Ebsco Industries Inc. Top agencies HHS (Department of Health and Human Services)	$129,495	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 11 since FY2020.
43	Java Productions, Inc. Top agencies GSA (General Services Administration)	$128,448	<0.1%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; down 24 since FY2020.
44	Mcgraw Hill LLC Top agencies DHA (Defense Health Agency)	$126,008	<0.1%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
45	First Databank, Inc. Top agencies HHS (Department of Health and Human Services)	$122,790	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
46	American Society of Health-System Pharmacists Inc. Top agencies HHS (Department of Health and Human Services)	$117,747	<0.1%	Rank history: #35 in FY2022, #32 in FY2023, #24 in FY2024 and #19 in FY2025; down 1 since FY2020.
47	Table Mountain Consulting Group PLLC Top agencies USSOCOM (United States Special Operations Command)	$106,106	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Ability Network Inc. Through Inovalon Provider, Inc. Top agencies HHS (Department of Health and Human Services)	$97,943	<0.1%	Rank history: #47 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
49	General Dynamics Corporation Through Gulfstream Aerospace Corporation Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$97,458	<0.1%	Rank history: #40 in FY2022, #38 in FY2023, #31 in FY2024 and #24 in FY2025; down 1 since FY2020.
50	Oil Price Information Service LLC 2 awardees, including OAG Aviation Worldwide LLC and IHS Global Inc. Top agencies DHS (Department of Homeland Security) EPA (Environmental Protection Agency) DOS (Department of State)	$95,945	<0.1%	Rank history: #38 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
51	Mary ANN Liebert Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy)	$93,945	<0.1%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
52	Scot-Med LLC Top agencies Army (Department of the Army)	$88,822	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Telemedia,Llc Top agencies DOJ (Department of Justice)	$82,115	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Professional Sports Publications Inc. Top agencies HHS (Department of Health and Human Services)	$75,000	<0.1%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
55	Fostersoft Inc. Top agencies FTC (Federal Trade Commission)	$73,207	<0.1%	Rank history: #46 in FY2022, not on the FY2023 list, #29 in FY2024 and #31 in FY2025; down 11 since FY2020.
56	Veryon Top agencies DOI (Department of the Interior)	$68,258	<0.1%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
57	American Psychiatric Association Top agencies SSA (Social Security Administration)	$63,935	<0.1%	Rank history: #48 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
58	Lumen Technologies, Inc. Through Level 3 Communications, LLC Top agencies DOJ (Department of Justice)	$63,320	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 74 since FY2020.
59	The Associated Press Top agencies DOS (Department of State)	$56,881	<0.1%	Rank history: #80 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
60	Markets and Markets Research Private Limited Top agencies Commerce (Department of Commerce)	$56,250	<0.1%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
61	The Economist Newspaper Ltd Through The Economist Intelligence Unit, NA, Incorporated Top agencies MCC (Millennium Challenge Corporation)	$56,084	<0.1%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; down 8 since FY2020.
62	Davis, Sidney A Top agencies Navy (Department of the Navy)	$56,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Watch Systems LLC Top agencies DHS (Department of Homeland Security)	$52,531	<0.1%	Rank history: #53 in FY2022, #42 in FY2023, #32 in FY2024 and #23 in FY2025; up 1 since FY2020.
64	Psychological Assessment Resources, Inc. Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$51,312	<0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 60 since FY2020.
65	Southwest Distribution Inc. Top agencies EXIM (Export Import Bank of the US)	$50,608	<0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
66	Mcgraw Hill Financial Inc. Through S&P Global Market Intelligence LLC Top agencies Navy (Department of the Navy)	$48,870	<0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
67	Copyright Clearance Center, Inc. Top agencies Army (Department of the Army)	$47,670	<0.1%	Rank history: #57 in FY2022, #45 in FY2023, #38 in FY2024 and #27 in FY2025; new, not ranked in FY2020.
68	National Fire Protection Association, Inc. Top agencies Navy (Department of the Navy)	$47,250	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 65 since FY2020.
69	RJA Accounting Services, Inc. Top agencies Navy (Department of the Navy)	$42,660	<0.1%	Rank history: not on the FY2022 list, #44 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2020.
70	Cambridge Information Group Inc. Through Proquest LLC Top agencies NASA (National Aeronautics and Space Administration)	$41,693	<0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
71	Global Knowledge Solutions LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$40,965	<0.1%	Rank history: #95 in FY2022, #61 in FY2023, #48 in FY2024 and #35 in FY2025; new, not ranked in FY2020.
72	Ithaka Harbors Inc. Top agencies Army (Department of the Army) FCC (Federal Communications Commission) Treasury (Department of the Treasury)	$40,811	<0.1%	Rank history: #61 in FY2022, #49 in FY2023, #39 in FY2024 and #33 in FY2025; up 12 since FY2020.
73	Alliance for Automotive Innovation Top agencies EPA (Environmental Protection Agency)	$40,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 25 since FY2020.
74	BLH Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$39,804	<0.1%	Rank history: #25 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
75	Emergency University, Inc. Top agencies DOI (Department of the Interior) GSA (General Services Administration)	$39,037	<0.1%	Rank history: #59 in FY2022, #39 in FY2023, #21 in FY2024 and #29 in FY2025; down 6 since FY2020.
76	New TECH Solutions, Inc. Top agencies Commerce (Department of Commerce)	$37,572	<0.1%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
77	Camnet Inc. Top agencies HHS (Department of Health and Human Services)	$36,764	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
78	Stratcomm, Inc. Top agencies DOS (Department of State)	$35,333	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Sigma Assessment Systems Inc. Top agencies USSOCOM (United States Special Operations Command)	$33,356	<0.1%	Rank history: #93 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
80	Multi-Health Systems Inc. Top agencies DCAA (Defense Contract Audit Agency) DHA (Defense Health Agency) Navy (Department of the Navy)	$32,361	<0.1%	Rank history: #55 in FY2022, #52 in FY2023, #46 in FY2024 and #32 in FY2025; down 33 since FY2020.
81	Korn / Ferry International Through Sensa Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$32,300	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
82	Achieve3000 Inc. Top agencies DOI (Department of the Interior)	$31,670	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
83	Radiation Research Society Top agencies HHS (Department of Health and Human Services)	$30,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Potomacwave, Inc. Top agencies SEC (Securities and Exchange Commission)	$30,000	<0.1%	Rank history: not on the FY2022–FY2024 lists and #25 in FY2025; down 1 since FY2020.
85	Sirsi Corporation Top agencies USAF (Department of the Air Force)	$30,000	<0.1%	Rank history: not on the FY2022 list, #48 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
86	LM Information Delivery Inc. Top agencies HHS (Department of Health and Human Services)	$28,833	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 57 since FY2020.
87	Sinclair Broadcast Group Inc. Through Politico, LLC Top agencies DOT (Department of Transportation) EPA (Environmental Protection Agency)	$27,339	<0.1%	Rank history: #41 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
88	American National Standards Institute Incorporated Top agencies USAF (Department of the Air Force)	$26,467	<0.1%	Rank history: #67 in FY2022, #51 in FY2023, #40 in FY2024 and not on the FY2025 list; down 2 since FY2020.
89	M.d. Buyline, Inc. Top agencies VA (Department of Veterans Affairs)	$25,978	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
90	Fergus Mitchell Enterprises, Ltd. Top agencies Army (Department of the Army)	$25,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	National Institute of Building Sciences Top agencies Army (Department of the Army)	$24,838	<0.1%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
92	The Myers-Briggs Company Top agencies Navy (Department of the Navy)	$24,446	<0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
93	Marlin Software, LLC Top agencies VA (Department of Veterans Affairs)	$22,572	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 30 since FY2020.
94	Adorama Inc. Top agencies Navy (Department of the Navy)	$18,943	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Skillsoft Corporation Through Skillsoft (Us) LLC Top agencies NEA (National Endowment for the Arts)	$16,884	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
96	National Safety Council Top agencies Navy (Department of the Navy)	$15,088	<0.1%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
97	The American Society of Mechanical Engineers Top agencies DHS (Department of Homeland Security)	$14,279	<0.1%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
98	Aerva Inc. Top agencies Navy (Department of the Navy)	$13,856	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	East View Information Services, Inc. Top agencies DOI (Department of the Interior)	$13,199	<0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
100	QT Company the Top agencies Navy (Department of the Navy)	$13,125	<0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.

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100 of 122 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 $652 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 511199 contractors in FY2021?

1. Fors Marsh Group LLC ($207M), 2. Reed Elsevier Inc. ($176M), 3. FSC Colorado Holdings Inc. ($57M), 4. IQ Solutions, Inc. ($50.1M), 5. Hager Sharp, Inc. ($20M), 6. Altarum Institute ($19M), 7. Variq Corporation ($13.2M), 8. Betah Associates, Inc. ($8.34M), 9. SOLE Solutions Inc. ($6.46M), 10. Iron Vine Security LLC ($5.98M).

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