Top 100 Contractors in NAICS 54121: Accounting, Tax Preparation, Bookkeeping, and Payroll Services, FY2025

Name: Top 100 Contractors in NAICS 54121: Accounting, Tax Preparation, Bookkeeping, and Payroll Services, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 71% of FY2025 NAICS 54121 contract dollars

Contract obligations: $1,842,320,807 Net of deobligations, by contracts coded NAICS 54121 or a code under it
Contractors: 221 Parent companies with an obligation
Largest contractor: Ernst & Young LLP $386 million, 19.1% 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	Ernst & Young LLP 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) HUD (Department of Housing and Urban Development)	$386,199,946	19.1%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Kpmg LLP Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) Army (Department of the Army)	$369,222,701	18.3%	Rank history: #1 in FY2021, #2 in FY2022, #3 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Deloitte 2 awardees, including Deloitte & Touche LLP and Deloitte Consulting LLP Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$245,237,032	12.1%	Rank history: #3 in FY2021, #3 in FY2022, #2 in FY2023 and #3 in FY2024; unchanged since FY2024.
4	E.f. Kearney, Limited Through Kearney & Company, P.C. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$187,159,129	9.3%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; unchanged since FY2024.
5	Guidehouse Inc. 3 awardees Top agencies Navy (Department of the Navy) HUD (Department of Housing and Urban Development) USAF (Department of the Air Force)	$61,440,237	3.0%	Rank history: #10 in FY2021, #10 in FY2022, #5 in FY2023 and #5 in FY2024; unchanged since FY2024.
6	Integrated Finance and Accounting Solutions, Llc. Top agencies DOS (Department of State) Treasury (Department of the Treasury) DOT (Department of Transportation)	$52,965,795	2.6%	Rank history: not on the FY2021 list, #29 in FY2022, #8 in FY2023 and #9 in FY2024; up 3 since FY2024.
7	The CBE Group, Inc. Top agencies Treasury (Department of the Treasury)	$47,723,379	2.4%	Rank history: #8 in FY2021, #6 in FY2022, #6 in FY2023 and #7 in FY2024; unchanged since FY2024.
8	Research Triangle Institute Top agencies ED (Department of Education) DOL (Department of Labor) HHS (Department of Health and Human Services)	$33,869,767	1.7%	Rank history: #38 in FY2021, #8 in FY2022, #7 in FY2023 and #8 in FY2024; unchanged since FY2024.
9	Hamilton Enterprises, LLC Top agencies DHS (Department of Homeland Security) Treasury (Department of the Treasury) DHA (Defense Health Agency)	$31,395,721	1.6%	Rank history: #11 in FY2021, #13 in FY2022, #12 in FY2023 and #14 in FY2024; up 5 since FY2024.
10	Sikich CPA LLC Top agencies HUD (Department of Housing and Urban Development) USAF (Department of the Air Force) DSCA (Defense Security Cooperation Agency)	$29,446,367	1.5%	Rank history: #19 in FY2021, #19 in FY2022, #20 in FY2023 and #15 in FY2024; up 5 since FY2024.
11	Conrad LLP Top agencies HHS (Department of Health and Human Services)	$27,972,721	1.4%	Rank history: #18 in FY2021, #15 in FY2022, #11 in FY2023 and #12 in FY2024; up 1 since FY2024.
12	Williams, Adley & Company DC LLP Top agencies HUD (Department of Housing and Urban Development) SBA (Small Business Administration) DFAS (Defense Finance and Accounting Service)	$15,420,925	0.8%	Rank history: #15 in FY2021, #23 in FY2022, #17 in FY2023 and #11 in FY2024; down 1 since FY2024.
13	Myers and Stauffer LC Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$14,954,835	0.7%	Rank history: #7 in FY2021, #20 in FY2022, #19 in FY2023 and #61 in FY2024; up 48 since FY2024.
14	Iberia Advisory LLC Top agencies Navy (Department of the Navy)	$14,805,526	0.7%	Rank history: not on the FY2021–FY2024 lists; up 238 since FY2024.
15	Castro & Company, LLC Top agencies DCMA (Defense Contract Management Agency) NASA (National Aeronautics and Space Administration) PBGC (Pension Benefit Guaranty Corporation)	$14,691,679	0.7%	Rank history: #26 in FY2021, #25 in FY2022, #16 in FY2023 and #16 in FY2024; up 1 since FY2024.
16	FM Talent Source LLC Top agencies HHS (Department of Health and Human Services) ED (Department of Education) EAC (US Election Assistance Commission)	$13,562,199	0.7%	Rank history: #40 in FY2021, #48 in FY2022, #21 in FY2023 and #19 in FY2024; up 3 since FY2024.
17	American Institutes for Research In the Behavioral Sciences Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DOT (Department of Transportation)	$12,966,067	0.6%	Rank history: not on the FY2021 list, #76 in FY2022, #50 in FY2023 and #13 in FY2024; down 4 since FY2024.
18	Five Stones Intelligence Inc. Top agencies Treasury (Department of the Treasury) DOS (Department of State)	$11,805,738	0.6%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2024; up 4 since FY2024.
19	AOC Solutions, Inc. Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$11,565,510	0.6%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and #27 in FY2024; up 8 since FY2024.
20	Great Hill Solutions, LLC Top agencies DHA (Defense Health Agency)	$11,257,656	0.6%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and #25 in FY2024; up 5 since FY2024.
21	Avantus Federal LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$11,195,390	0.6%	Rank history: #5 in FY2021, #5 in FY2022, #9 in FY2023 and #46 in FY2024; up 25 since FY2024.
22	State Street Corporation Top agencies PBGC (Pension Benefit Guaranty Corporation)	$10,308,012	0.5%	Rank history: #22 in FY2021, #17 in FY2022, #27 in FY2023 and #26 in FY2024; up 4 since FY2024.
23	Lyceum Business Services, LLC Top agencies HHS (Department of Health and Human Services)	$10,052,938	0.5%	Rank history: #35 in FY2021, #70 in FY2022 and not on the FY2023–FY2024 lists; returned.
24	Sehlke Consulting LLC Top agencies Navy (Department of the Navy)	$9,647,735	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
25	Vintun LLC Top agencies Army (Department of the Army)	$8,752,256	0.4%	Rank history: #43 in FY2021, not on the FY2022 list, #48 in FY2023 and #10 in FY2024; down 15 since FY2024.
26	Lynch Consultants, LLC Top agencies DLA (Defense Logistics Agency) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$8,608,065	0.4%	Rank history: #14 in FY2021, #16 in FY2022, #18 in FY2023 and #20 in FY2024; down 6 since FY2024.
27	Federal Miracle TECH LLC Top agencies DHS (Department of Homeland Security) GSA (General Services Administration)	$7,918,292	0.4%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2024; up 10 since FY2024.
28	Tribility LLC Top agencies VA (Department of Veterans Affairs)	$7,567,617	0.4%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2024; up 2 since FY2024.
29	Saint George Consulting Inc. Top agencies VA (Department of Veterans Affairs) Treasury (Department of the Treasury)	$6,925,082	0.3%	Rank history: #32 in FY2021, #44 in FY2022, #33 in FY2023 and #34 in FY2024; up 5 since FY2024.
30	Receivia Inc Top agencies VA (Department of Veterans Affairs)	$6,905,810	0.3%	Rank history: not on the FY2021 list, #28 in FY2022, #37 in FY2023 and #33 in FY2024; up 3 since FY2024.
31	Westat, Inc. Top agencies DOT (Department of Transportation) ED (Department of Education)	$6,381,380	0.3%	Rank history: #20 in FY2021, #27 in FY2022, #35 in FY2023 and #17 in FY2024; down 14 since FY2024.
32	Semanticbits LLC Through ICF Incorporated, L.L.C. Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development)	$5,995,147	0.3%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; unchanged since FY2024.
33	Gentech Associates Inc. Top agencies VA (Department of Veterans Affairs) WHS (DOD Washington Headquarters Service) DHRA (Defense Human Resources Activity)	$5,847,052	0.3%	Rank history: not on the FY2021 list, #32 in FY2022, #39 in FY2023 and #38 in FY2024; up 5 since FY2024.
34	Chugach Dynamic Solutions LLC Top agencies USAID (US Agency for International Development)	$5,784,318	0.3%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and #57 in FY2024; up 23 since FY2024.
35	Integrated Management Strategies LLC Top agencies DHA (Defense Health Agency)	$5,635,952	0.3%	Rank history: not on the FY2021 list, #57 in FY2022, #36 in FY2023 and #52 in FY2024; up 17 since FY2024.
36	Cohnreznick LLP Top agencies DOE (Department of Energy) DHS (Department of Homeland Security)	$5,465,154	0.3%	Rank history: #33 in FY2021, #18 in FY2022, #15 in FY2023 and #21 in FY2024; down 15 since FY2024.
37	Reed & Associates, Cpas, Inc. Top agencies HHS (Department of Health and Human Services) NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$5,205,858	0.3%	Rank history: #37 in FY2021, #34 in FY2022, #47 in FY2023 and #44 in FY2024; up 7 since FY2024.
38	Federal Management Systems, Inc. Top agencies Treasury (Department of the Treasury) EOP (Executive Office of the President)	$5,140,133	0.3%	Rank history: #23 in FY2021, #33 in FY2022, #45 in FY2023 and #39 in FY2024; up 1 since FY2024.
39	ST. Michael's Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$4,608,798	0.2%	Rank history: #99 in FY2021, not on the FY2022 list, #40 in FY2023 and #79 in FY2024; up 40 since FY2024.
40	Chickasaw Strategic Pointe, LLC Top agencies USDA (Department of Agriculture)	$4,026,092	0.2%	Rank history: not on the FY2021 list, #42 in FY2022, #52 in FY2023 and #43 in FY2024; up 3 since FY2024.
41	Savalan LLC Top agencies HUD (Department of Housing and Urban Development) SBA (Small Business Administration) DOT (Department of Transportation)	$3,740,780	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; up 27 since FY2024.
42	BAE Systems Through BAE Systems Technology Solutions & Services Inc. Top agencies PBGC (Pension Benefit Guaranty Corporation)	$3,515,003	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
43	Morgan Business Consulting, LLC Top agencies Navy (Department of the Navy)	$3,440,920	0.2%	Rank history: not on the FY2021–FY2024 lists; up 205 since FY2024.
44	Redwood Strategy Group Inc. Top agencies DHRA (Defense Human Resources Activity) DCAA (Defense Contract Audit Agency) OSD (Office of the Secretary of Defense)	$3,431,560	0.2%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2024; up 14 since FY2024.
45	Muscogee Asset Protection, LLC Top agencies DHA (Defense Health Agency)	$3,208,072	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
46	Tuba Group, Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) DOJ (Department of Justice)	$2,906,107	0.1%	Rank history: #63 in FY2021, #72 in FY2022, not on the FY2023 list and #78 in FY2024; up 32 since FY2024.
47	David-James LLC Top agencies HHS (Department of Health and Human Services)	$2,897,493	0.1%	Rank history: #24 in FY2021, #24 in FY2022, #25 in FY2023 and #24 in FY2024; down 23 since FY2024.
48	Verato, Inc. Top agencies DHS (Department of Homeland Security) DCSA (Defense Counterintelligence and Security Agency) Treasury (Department of the Treasury)	$2,599,957	0.1%	Rank history: #9 in FY2021, #14 in FY2022, #13 in FY2023 and #40 in FY2024; down 8 since FY2024.
49	Bland & Associates PC Top agencies HHS (Department of Health and Human Services)	$2,546,922	0.1%	Rank history: #31 in FY2021, #41 in FY2022, #59 in FY2023 and #86 in FY2024; up 37 since FY2024.
50	Chickasaw Business Solutions, LLC Top agencies DOE (Department of Energy)	$2,542,413	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
51	Harper Rains Knight & Co Pa Top agencies SSA (Social Security Administration) DOL (Department of Labor) EEOC (Equal Employment Opportunity Commission)	$2,525,599	0.1%	Rank history: #64 in FY2021, #61 in FY2022, #61 in FY2023 and #54 in FY2024; up 3 since FY2024.
52	Blake Willson Group LLC Top agencies NSF (National Science Foundation) HHS (Department of Health and Human Services)	$2,518,341	0.1%	Rank history: not on the FY2021 list, #84 in FY2022, #87 in FY2023 and #59 in FY2024; up 7 since FY2024.
53	ITC Federal, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$2,517,441	0.1%	Rank history: #66 in FY2021, #45 in FY2022, #53 in FY2023 and #60 in FY2024; up 7 since FY2024.
54	Davis Farr LLP Top agencies HHS (Department of Health and Human Services) DCAA (Defense Contract Audit Agency) DOT (Department of Transportation)	$2,514,079	0.1%	Rank history: #51 in FY2021, #39 in FY2022, #43 in FY2023 and #45 in FY2024; down 9 since FY2024.
55	RP Solutions LLC Top agencies DOT (Department of Transportation)	$2,509,877	0.1%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 28 since FY2024.
56	FMR Consulting Inc. Top agencies ED (Department of Education)	$2,478,381	0.1%	Rank history: #60 in FY2021, #59 in FY2022 and not on the FY2023–FY2024 lists; returned.
57	TFC Consulting Inc. Top agencies DSCA (Defense Security Cooperation Agency) DHS (Department of Homeland Security) DOT (Department of Transportation)	$2,441,271	0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2024; up 24 since FY2024.
58	Fedsync BEI LLC Top agencies HHS (Department of Health and Human Services)	$2,348,872	0.1%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 5 since FY2024.
59	FI Consulting, Inc. Top agencies DHS (Department of Homeland Security)	$2,315,595	0.1%	Rank history: #54 in FY2021, #71 in FY2022, #38 in FY2023 and #35 in FY2024; down 24 since FY2024.
60	Teya Support Services LLC Top agencies DOJ (Department of Justice)	$2,262,607	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Accenture Federal Services LLC Top agencies Army (Department of the Army)	$2,259,997	0.1%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; up 19 since FY2024.
62	Futrend Technology Inc. Top agencies HHS (Department of Health and Human Services)	$2,203,968	0.1%	Rank history: #59 in FY2021, #62 in FY2022, #55 in FY2023 and #76 in FY2024; up 14 since FY2024.
63	Holmes & Company, L.L.C. Top agencies DOT (Department of Transportation) USDA (Department of Agriculture) GSA (General Services Administration)	$2,197,595	0.1%	Rank history: not on the FY2021–FY2024 lists; up 98 since FY2024.
64	Crisis1, LLC Top agencies DHS (Department of Homeland Security)	$2,151,107	0.1%	Rank history: #86 in FY2021, #85 in FY2022, #76 in FY2023 and #74 in FY2024; up 10 since FY2024.
65	The Joachim Group, Cpa's & Consultants, LLC Top agencies DHRA (Defense Human Resources Activity) HUD (Department of Housing and Urban Development)	$2,113,400	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2024; up 12 since FY2024.
66	Saggar & Rosenberg, P.C. Top agencies CNCS (Corporation for National and Community Service) Treasury (Department of the Treasury) PBGC (Pension Benefit Guaranty Corporation)	$1,866,570	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2023 and not on the FY2024 list; up 46 since FY2024.
67	Horus Technology Solutions Inc. Top agencies HHS (Department of Health and Human Services)	$1,858,836	0.1%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2024; down 31 since FY2024.
68	Douglas, Sheets, and Stremcha, Cpas, LLC Top agencies HHS (Department of Health and Human Services)	$1,730,128	0.1%	Rank history: #79 in FY2021, #77 in FY2022, not on the FY2023 list and #55 in FY2024; down 13 since FY2024.
69	Cotiviti GOV Services, LLC Top agencies HHS (Department of Health and Human Services)	$1,688,040	0.1%	Rank history: not on the FY2021 list, #79 in FY2022, not on the FY2023 list and #31 in FY2024; down 38 since FY2024.
70	Dynamo Technologies LLC Through Credence Dynamo Technologies LLC Top agencies DHS (Department of Homeland Security)	$1,655,716	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
71	Tichenor & Associates, LLP Top agencies DCAA (Defense Contract Audit Agency) NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs)	$1,594,223	0.1%	Rank history: #57 in FY2021, not on the FY2022 list, #85 in FY2023 and #53 in FY2024; down 18 since FY2024.
72	Immersion Consulting LLC Top agencies DHS (Department of Homeland Security)	$1,417,514	0.1%	Rank history: #94 in FY2021, not on the FY2022 list, #66 in FY2023 and #91 in FY2024; up 19 since FY2024.
73	Michael Shannon Consulting LLC Top agencies Navy (Department of the Navy)	$1,408,803	0.1%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; down 6 since FY2024.
74	Goldbelt Integrated Logistics Services, LLC Top agencies DHS (Department of Homeland Security)	$1,359,984	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
75	Viridis Point, LLC Top agencies HHS (Department of Health and Human Services)	$1,210,445	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
76	Allmond & Co, LLC Top agencies HHS (Department of Health and Human Services) EAC (US Election Assistance Commission) DOT (Department of Transportation)	$1,191,908	0.1%	Rank history: #67 in FY2021, #58 in FY2022, #69 in FY2023 and #47 in FY2024; down 29 since FY2024.
77	Csci-Gentech II LLC Top agencies DMEA (Defense Microelectronics Activity)	$1,138,570	0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #90 in FY2024; up 13 since FY2024.
78	Computer Evidence Specialists, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) DOJ (Department of Justice)	$1,107,528	0.1%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; down 5 since FY2024.
79	Omni Consulting Solutions LLC Top agencies USAF (Department of the Air Force)	$1,103,541	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
80	RMA Associates LLC Top agencies DODIG (Department of Defense Inspector General) Treasury (Department of the Treasury) CFTC (Commodity Futures Trading Commission)	$1,062,696	0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
81	Eaccounting LLC Top agencies OSD (Office of the Secretary of Defense)	$1,035,741	0.1%	Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
82	Kroll, LLC Top agencies Army (Department of the Army)	$941,228	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Summit Fire Protection Co. Through Blackrock Institutional Trust Company National Association Top agencies PBGC (Pension Benefit Guaranty Corporation)	$900,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Elitebco LLC Top agencies HUD (Department of Housing and Urban Development)	$900,000	<0.1%	Rank history: #83 in FY2021, #64 in FY2022, not on the FY2023 list and #72 in FY2024; down 12 since FY2024.
85	County of Monroe Top agencies EOP (Executive Office of the President)	$886,722	<0.1%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 15 since FY2024.
86	Kingstonville-Mercadien JV LLC Top agencies SBA (Small Business Administration)	$858,893	<0.1%	Rank history: #50 in FY2021, #50 in FY2022, #54 in FY2023 and #62 in FY2024; down 24 since FY2024.
87	Mcbride, Lock & Associates, LLC Top agencies NSF (National Science Foundation) DOJ (Department of Justice) Commerce (Department of Commerce)	$851,492	<0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #98 in FY2024; up 11 since FY2024.
88	Davis Audrey Robinette Top agencies HUD (Department of Housing and Urban Development) USDA (Department of Agriculture) DCAA (Defense Contract Audit Agency)	$798,644	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 21 since FY2024.
89	Tinker Salome Chris Enterprise, LLC Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security) NSF (National Science Foundation)	$780,625	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 57 since FY2024.
90	The Kennedy Collective, Inc. Top agencies HUD (Department of Housing and Urban Development)	$774,387	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
91	ATA Services, Inc. Top agencies DOI (Department of the Interior)	$762,571	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
92	Ascella Technologies Inc. Top agencies SEC (Securities and Exchange Commission)	$761,102	<0.1%	Rank history: not on the FY2021 list, #74 in FY2022, #80 in FY2023 and #94 in FY2024; up 2 since FY2024.
93	Keystone Advisors LLC Top agencies DOJ (Department of Justice)	$740,349	<0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and #66 in FY2024; down 27 since FY2024.
94	Lani EKO & Company Cpas PLLC Top agencies DOJ (Department of Justice)	$703,026	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 8 since FY2024.
95	Infopact, Inc. Top agencies HHS (Department of Health and Human Services)	$678,586	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 15 since FY2024.
96	Escience & Technology Solutions, Inc. Top agencies DOS (Department of State)	$674,220	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 7 since FY2024.
97	Looper Consulting LLC Top agencies Commerce (Department of Commerce)	$649,720	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	Axiom Corporation Top agencies VA (Department of Veterans Affairs)	$640,801	<0.1%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2024; up 1 since FY2024.
99	RM Advisory Services, LLC Top agencies DOS (Department of State) Commerce (Department of Commerce)	$631,468	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
100	J29, Inc. Top agencies HHS (Department of Health and Human Services) DOL (Department of Labor)	$629,152	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 17 since FY2024.

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100 of 221 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 54121

Code	Net obligations	Largest contractor
541211 Offices of Certified Public Accountants	$1,048,611,331	Ernst & Young LLP
541219 Other Accounting Services	$768,238,464	Deloitte

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 $2.02 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 54121 contractors in FY2025?

1. Ernst & Young LLP ($386M), 2. Kpmg LLP ($369M), 3. Deloitte ($245M), 4. E.f. Kearney, Limited ($187M), 5. Guidehouse Inc. ($61.4M), 6. Integrated Finance and Accounting Solutions, Llc. ($53M), 7. The CBE Group, Inc. ($47.7M), 8. Research Triangle Institute ($33.9M), 9. Hamilton Enterprises, LLC ($31.4M), 10. Sikich CPA LLC ($29.4M).

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