Top 100 Government Accountability Office Contractors, FY2024

Name: Top 100 Government Accountability Office Contractors, FY2024
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Agency page on GovTribe

The top 10 won 69% of FY2024 Government Accountability Office contract dollars

Contract obligations: $126,018,654 Net of deobligations, by the Government Accountability Office and its offices
Contractors: 141 Parent companies with an obligation
Largest contractor: Advanced Technology Systems Inc. $28.3 million, 20.5% 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	Advanced Technology Systems Inc. 2 awardees Top NAICS codes 541512 Computer Systems Design Services	$28,287,355	20.5%	Rank history: #2 in FY2021, #7 in FY2022, #1 in FY2023 and not on the FY2025 list; unchanged since FY2023.
2	Emcor Group Inc. Through Emcor Government Services, Inc. Top NAICS codes 561210 Facilities Support Services	$16,581,116	12.0%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2023 and #3 in FY2025; unchanged since FY2023.
3	Four Points Technology, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$12,767,433	9.3%	Rank history: #32 in FY2021, #6 in FY2022, #3 in FY2023 and #1 in FY2025; unchanged since FY2023.
4	James G Davis Construction Corp Top NAICS codes 236220 Commercial and Institutional Building Construction	$8,520,881	6.2%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023 and #14 in FY2025; up 6 since FY2023.
5	Lumen Technologies, Inc. 2 awardees, including Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers	$8,183,111	5.9%	Rank history: #10 in FY2021, #10 in FY2022, #4 in FY2023 and not on the FY2025 list; down 1 since FY2023.
6	Securamerica, LLC Through American Security Programs Inc. Top NAICS codes 561612 Security Guards and Patrol Services	$8,099,839	5.9%	Rank history: #3 in FY2021, not on the FY2022 list, #5 in FY2023 and not on the FY2025 list; down 1 since FY2023.
7	Insight Public Sector, Inc. Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services	$4,448,806	3.2%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
8	Meltech Corporation, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$3,790,879	2.7%	Rank history: not on the FY2021–FY2022 lists, #18 in FY2023 and not on the FY2025 list; up 10 since FY2023.
9	Serco Inc 2 awardees Top NAICS codes 611710 Educational Support Services	$2,385,784	1.7%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
10	Govsmart, Inc. Top NAICS codes 541519 Other Computer Related Services	$2,135,952	1.5%	Rank history: #12 in FY2021, #15 in FY2022, #16 in FY2023 and #15 in FY2025; up 6 since FY2023.
11	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top NAICS codes 519190 All Other Information Services	$1,993,058	1.4%	Rank history: not on the FY2021 list, #11 in FY2022, #12 in FY2023 and not on the FY2025 list; up 1 since FY2023.
12	Four LLC Top NAICS codes 541519 Other Computer Related Services	$1,663,364	1.2%	Rank history: #19 in FY2021, #34 in FY2022, #13 in FY2023 and #16 in FY2025; up 1 since FY2023.
13	New TECH Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$1,564,325	1.1%	Rank history: #9 in FY2021, #8 in FY2022, #11 in FY2023 and #37 in FY2025; down 2 since FY2023.
14	Immersive Concepts L.L.C. Top NAICS codes 561611 Investigation and Personal Background Check Services 561210 Facilities Support Services	$1,389,043	1.0%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2025; new.
15	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$1,247,111	0.9%	Rank history: #16 in FY2021, #21 in FY2022, #25 in FY2023 and #17 in FY2025; up 10 since FY2023.
16	Dell Technologies Inc. Through Dell Federal Systems L.P Top NAICS codes 541519 Other Computer Related Services	$1,237,660	0.9%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2025; new.
17	Sikich CPA LLC Top NAICS codes 541211 Offices of Certified Public Accountants	$1,216,408	0.9%	Rank history: #7 in FY2021, #25 in FY2022, #22 in FY2023 and #18 in FY2025; up 5 since FY2023.
18	Versar Security Systems, LLC Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$1,133,814	0.8%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
19	Regan Technologies Corp Top NAICS codes 541519 Other Computer Related Services	$1,103,082	0.8%	Rank history: not on the FY2021–FY2022 lists, #26 in FY2023 and #22 in FY2025; up 7 since FY2023.
20	The Building People LLC Top NAICS codes 541614 Process, Physical Distribution, and Logistics Consulting Services 561210 Facilities Support Services	$1,101,219	0.8%	Rank history: #22 in FY2021, #23 in FY2022, #15 in FY2023 and #28 in FY2025; down 5 since FY2023.
21	End to End Computing LLC Through End To End Enterprise Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$998,999	0.7%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
22	Arcadis N.V. Top NAICS codes 541330 Engineering Services	$969,987	0.7%	Rank history: #11 in FY2021, #17 in FY2022, #19 in FY2023 and not on the FY2025 list; down 3 since FY2023.
23	Kpmg L.L.P. Top NAICS codes 541211 Offices of Certified Public Accountants	$889,437	0.6%	Rank history: not on the FY2021 list, #22 in FY2022, #23 in FY2023 and not on the FY2025 list; unchanged since FY2023.
24	Scribedoc.com, Inc. Top NAICS codes 541512 Computer Systems Design Services	$749,563	0.5%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and not on the FY2025 list; up 3 since FY2023.
25	Mythics, LLC 2 awardees, including Emergent, LLC Top NAICS codes 541519 Other Computer Related Services	$727,275	0.5%	Rank history: #44 in FY2021, #19 in FY2022, #30 in FY2023 and #29 in FY2025; up 5 since FY2023.
26	August Schell Enterprises, Inc. Top NAICS codes 541519 Other Computer Related Services	$677,291	0.5%	Rank history: #15 in FY2021, #14 in FY2022, #20 in FY2023 and #11 in FY2025; down 6 since FY2023.
27	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services	$613,832	0.4%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
28	Relx Inc 4 awardees, including Elsevier Inc. and Lnrs Data Services Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services 488190 Other Support Activities for Air Transportation	$553,886	0.4%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and #33 in FY2025; up 50 since FY2023.
29	Whitman Requardt & Associates LLP Top NAICS codes 541330 Engineering Services	$544,605	0.4%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2023 list and #73 in FY2025; returned.
30	Jacobs Government Services Company Through Jacobs Engineering Group Inc. Top NAICS codes 541330 Engineering Services	$509,444	0.4%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2025; new.
31	National Academy of Sciences Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$504,616	0.4%	Rank history: #47 in FY2021, #30 in FY2022, #56 in FY2023 and not on the FY2025 list; up 25 since FY2023.
32	Black Knight Data & Analytics LLC Top NAICS codes 541910 Marketing Research and Public Opinion Polling	$435,000	0.3%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2025; new.
33	CQ-Roll Call Inc. Top NAICS codes 519190 All Other Information Services	$416,147	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
34	Gartner, Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services 519120 Libraries and Archives	$410,752	0.3%	Rank history: #33 in FY2021, #33 in FY2022, #46 in FY2023 and #46 in FY2025; up 12 since FY2023.
35	Skillsoft (Us) LLC Top NAICS codes 511210 Software Publishers	$408,348	0.3%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
36	Flywheel Data LLC Top NAICS codes 541519 Other Computer Related Services	$393,157	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #68 in FY2023 and #31 in FY2025; up 32 since FY2023.
37	Business Products Group Inc Top NAICS codes 541519 Other Computer Related Services	$381,532	0.3%	Rank history: not on the FY2021 list, #39 in FY2022, #76 in FY2023 and not on the FY2025 list; up 39 since FY2023.
38	Cambridge Information Group Inc. Through Proquest LLC Top NAICS codes 519290 Web Search Portals and All Other Information Services	$369,729	0.3%	Rank history: not on the FY2021 list, #28 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
39	Verizon Communications Inc. Through Verizon Federal Inc. Top NAICS codes 517919 All Other Telecommunications	$366,569	0.3%	Rank history: #13 in FY2021, #24 in FY2022, #29 in FY2023 and not on the FY2025 list; down 10 since FY2023.
40	Bloomberg Finance LP Top NAICS codes 519290 Web Search Portals and All Other Information Services	$355,503	0.3%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2025; new.
41	Factset Research Systems Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services	$346,500	0.3%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2023 and not on the FY2025 list; up 11 since FY2023.
42	Diversified Sign Language Services, LLC Top NAICS codes 541930 Translation and Interpretation Services	$340,984	0.2%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and #32 in FY2025; down 6 since FY2023.
43	Leadership Connect, Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services 511140 Directory and Mailing List Publishers	$337,500	0.2%	Rank history: #39 in FY2021, #38 in FY2022, #41 in FY2023 and #36 in FY2025; down 2 since FY2023.
44	Thomson Reuters (Tax & Accounting), Inc. 2 awardees, including West Publishing Corporation Top NAICS codes 519190 All Other Information Services 519290 Web Search Portals and All Other Information Services	$330,653	0.2%	Rank history: #17 in FY2021, #18 in FY2022, #24 in FY2023 and #51 in FY2025; down 20 since FY2023.
45	Cellco Partnership Top NAICS codes 517312 Wireless Telecommunications Carriers (except Satellite)	$308,765	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	CTG Federal, LLC Top NAICS codes 541519 Other Computer Related Services	$295,232	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2025; new.
47	Politico, LLC Top NAICS codes 519290 Web Search Portals and All Other Information Services 519130 Internet Publishing and Broadcasting and Web Search Portals	$286,040	0.2%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2025; new.
48	Victory Global Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$278,434	0.2%	Rank history: not on the FY2021 list, #44 in FY2022, #58 in FY2023 and not on the FY2025 list; up 10 since FY2023.
49	EBL Engineers, LLC Top NAICS codes 541330 Engineering Services	$275,607	0.2%	Rank history: #37 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
50	Agilquest Corporation Top NAICS codes 541519 Other Computer Related Services	$266,076	0.2%	Rank history: #45 in FY2021, #51 in FY2022, #60 in FY2023 and #48 in FY2025; up 10 since FY2023.
51	Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers	$252,969	0.2%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2025; new.
52	Precise Systems Inc. Top NAICS codes 541430 Graphic Design Services	$245,762	0.2%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
53	JDG Associates Ltd Top NAICS codes 541612 Human Resources Consulting Services	$228,000	0.2%	Rank history: #58 in FY2021, #55 in FY2022, #74 in FY2023 and not on the FY2025 list; up 21 since FY2023.
54	RHG Group, Inc. Top NAICS codes 485999 All Other Transit and Ground Passenger Transportation	$221,210	0.2%	Rank history: #52 in FY2021, #54 in FY2022, #63 in FY2023 and #85 in FY2025; up 9 since FY2023.
55	Distributed Technology Group LLC Top NAICS codes 541519 Other Computer Related Services	$211,495	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
56	Fedex Corp Through Federal Express Corporation Top NAICS codes 492110 Couriers and Express Delivery Services	$200,000	0.1%	Rank history: #75 in FY2021, #64 in FY2022, #53 in FY2023 and #66 in FY2025; down 3 since FY2023.
57	Cliftonlarsonallen LLP Top NAICS codes 541219 Other Accounting Services	$199,632	0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and not on the FY2025 list; up 7 since FY2023.
58	Autoflex, Inc. Top NAICS codes 532112 Passenger Car Leasing	$172,124	0.1%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2025; new.
59	Sunplus Data Group Inc. Top NAICS codes 561320 Temporary Help Services	$165,048	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and not on the FY2025 list; up 6 since FY2023.
60	S&P Global Market Intelligence LLC Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$163,150	0.1%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2025; new.
61	Omni Business Systems, Inc. Top NAICS codes 532420 Office Machinery and Equipment Rental and Leasing	$160,920	0.1%	Rank history: #55 in FY2021, #65 in FY2022, #67 in FY2023 and #54 in FY2025; up 6 since FY2023.
62	Opencorporates Holding Ltd Through Opencorporates Ltd Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$160,313	0.1%	Rank history: not on the FY2021–FY2022 lists, #66 in FY2023 and #55 in FY2025; up 4 since FY2023.
63	Washington Metropolitan Area Transit Authority Top NAICS codes 485111 Mixed Mode Transit Systems	$149,999	0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2023 and #41 in FY2025; down 16 since FY2023.
64	Computer Technologies Consultants Inc. Top NAICS codes 541511 Custom Computer Programming Services	$149,186	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
65	Calloway & Associates, Inc. Top NAICS codes 541519 Other Computer Related Services	$141,679	0.1%	Rank history: #48 in FY2021, #50 in FY2022, #55 in FY2023 and not on the FY2025 list; down 10 since FY2023.
66	Dbisp LLC Top NAICS codes 334310 Audio and Video Equipment Manufacturing	$132,293	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
67	Tyler Federal, LLC Top NAICS codes 541511 Custom Computer Programming Services 511210 Software Publishers	$131,372	0.1%	Rank history: #34 in FY2021, #93 in FY2022, not on the FY2023 list and not on the FY2025 list; returned.
68	Tvar Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$131,369	0.1%	Rank history: #67 in FY2021, #63 in FY2022, #70 in FY2023 and not on the FY2025 list; up 2 since FY2023.
69	Architechture Solutions LLC Top NAICS codes 541519 Other Computer Related Services	$121,538	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
70	Buchanan & Edwards Inc. Top NAICS codes 541512 Computer Systems Design Services	$110,948	0.1%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2025; new.
71	Karcher Group Incorporated Top NAICS codes 334290 Other Communications Equipment Manufacturing	$101,301	0.1%	Rank history: not on the FY2021–FY2022 lists, #37 in FY2023 and #76 in FY2025; down 34 since FY2023.
72	Komodo Health, Inc. Top NAICS codes 541519 Other Computer Related Services	$100,000	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
73	Tyler Technologies, Inc. Through Tyler Federal, LLC Top NAICS codes 511210 Software Publishers	$96,414	0.1%	Rank history: not on the FY2021 list, #78 in FY2022, #57 in FY2023 and #57 in FY2025; down 16 since FY2023.
74	Ricoh Company,Ltd. Through Ricoh USA Inc. Top NAICS codes 333315 Photographic and Photocopying Equipment Manufacturing	$95,544	0.1%	Rank history: #36 in FY2021, #32 in FY2022, #85 in FY2023 and #69 in FY2025; up 11 since FY2023.
75	Cynuria Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$92,004	0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #90 in FY2023 and not on the FY2025 list; up 15 since FY2023.
76	Inside Washington Publishers LLC Top NAICS codes 519290 Web Search Portals and All Other Information Services	$91,000	0.1%	Rank history: #74 in FY2021, #75 in FY2022, #80 in FY2023 and #61 in FY2025; up 4 since FY2023.
77	Software Information Resource Corp Top NAICS codes 541519 Other Computer Related Services	$90,729	0.1%	Rank history: #23 in FY2021, not on the FY2022 list, #21 in FY2023 and #44 in FY2025; down 56 since FY2023.
78	Ebsco Information Services, LLC Top NAICS codes 519290 Web Search Portals and All Other Information Services	$87,079	0.1%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2025; new.
79	Info-Tech Research Group Inc. Top NAICS codes 541519 Other Computer Related Services	$86,112	0.1%	Rank history: #73 in FY2021, #74 in FY2022, #79 in FY2023 and not on the FY2025 list; unchanged since FY2023.
80	Coley & Associates, Inc. Top NAICS codes 541519 Other Computer Related Services	$83,255	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #81 in FY2023 and #64 in FY2025; up 1 since FY2023.
81	Tax Analysts Top NAICS codes 519290 Web Search Portals and All Other Information Services	$77,513	0.1%	Rank history: #80 in FY2021, #79 in FY2022, #86 in FY2023 and #65 in FY2025; up 5 since FY2023.
82	Nielsen Consumer LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$74,393	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
83	Strategic Communications LLC Top NAICS codes 541519 Other Computer Related Services	$66,573	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
84	Transource Services Corp. Top NAICS codes 541519 Other Computer Related Services	$62,541	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Unison Virtual Acquisition Office LLC Top NAICS codes 511210 Software Publishers	$57,044	<0.1%	Rank history: #94 in FY2021, #97 in FY2022, #98 in FY2023 and #72 in FY2025; up 13 since FY2023.
86	Exemplis LLC Top NAICS codes 337214 Office Furniture (except Wood) Manufacturing	$54,630	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
87	Alden Law Group PLLC Top NAICS codes 541199 All Other Legal Services	$51,700	<0.1%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; new.
88	Bloomberg L.P. Through Bloomberg Industry Group, Inc. Top NAICS codes 519190 All Other Information Services	$50,868	<0.1%	Rank history: #54 in FY2021, #57 in FY2022, #73 in FY2023 and not on the FY2025 list; down 15 since FY2023.
89	Wolters Kluwer United States Inc. Through CCH Incorporated Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$50,225	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
90	Alvarez LLC Top NAICS codes 541519 Other Computer Related Services	$46,754	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	Healthequity, Inc. Top NAICS codes 524292 Pharmacy Benefit Management and Other Third Party Administration of Insurance and Pension Funds	$45,656	<0.1%	Rank history: #85 in FY2021, #84 in FY2022, #97 in FY2023 and #94 in FY2025; up 6 since FY2023.
92	Caseware USA Inc. Top NAICS codes 511210 Software Publishers	$45,227	<0.1%	Rank history: #95 in FY2021, #95 in FY2022, #95 in FY2023 and not on the FY2025 list; up 3 since FY2023.
93	CDW Corporation Through CDW Government LLC Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services	$42,584	<0.1%	Rank history: #25 in FY2021, #58 in FY2022, #32 in FY2023 and not on the FY2025 list; down 61 since FY2023.
94	Wingswept, LLC Top NAICS codes 511210 Software Publishers	$41,240	<0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #78 in FY2025; down 10 since FY2023.
95	Govsolutions Inc. Top NAICS codes 561499 All Other Business Support Services	$41,112	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
96	Goodwill Easter Seals Miami Valley Top NAICS codes 561720 Janitorial Services	$39,731	<0.1%	Rank history: #98 in FY2021, #98 in FY2022, #100 in FY2023 and not on the FY2025 list; up 4 since FY2023.
97	Heritage Reporting Corporation Top NAICS codes 561320 Temporary Help Services	$39,528	<0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and not on the FY2025 list; down 4 since FY2023.
98	William S. Hein & Co., Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services	$37,600	<0.1%	Rank history: #99 in FY2021, #99 in FY2022, not on the FY2023 list and #82 in FY2025; up 4 since FY2023.
99	Clango, LLC Top NAICS codes 541519 Other Computer Related Services	$34,338	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 5 since FY2023.
100	ACE Federal Reporters, Inc. Top NAICS codes 561320 Temporary Help Services	$33,347	<0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 8 since FY2023.

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100 of 141 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 $138 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 Government Accountability Office contractors in FY2024?

1. Advanced Technology Systems Inc. ($28.3M), 2. Emcor Group Inc. ($16.6M), 3. Four Points Technology, L.L.C. ($12.8M), 4. James G Davis Construction Corp ($8.52M), 5. Lumen Technologies, Inc. ($8.18M), 6. Securamerica, LLC ($8.1M), 7. Insight Public Sector, Inc. ($4.45M), 8. Meltech Corporation, Inc. ($3.79M), 9. Serco Inc ($2.39M), 10. Govsmart, Inc. ($2.14M).

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