Top 100 Government Accountability Office Contractors, FY2023

Name: Top 100 Government Accountability Office Contractors, FY2023
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Agency page on GovTribe

The top 10 won 67% of FY2023 Government Accountability Office contract dollars

Contract obligations: $137,788,024 Net of deobligations, by the Government Accountability Office and its offices
Contractors: 135 Parent companies with an obligation
Largest contractor: Advanced Technology Systems Inc. $31 million, 21.9% 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. Top NAICS codes 541512 Computer Systems Design Services	$30,957,985	21.9%	Rank history: #2 in FY2021, #7 in FY2022, #1 in FY2024 and not on the FY2025 list; up 6 since FY2022.
2	Emcor Group Inc. Through Emcor Government Services, Inc. Top NAICS codes 561210 Facilities Support Services	$14,178,050	10.1%	Rank history: #1 in FY2021, #2 in FY2022, #2 in FY2024 and #3 in FY2025; unchanged since FY2022.
3	Four Points Technology, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$12,901,712	9.1%	Rank history: #32 in FY2021, #6 in FY2022, #3 in FY2024 and #1 in FY2025; up 3 since FY2022.
4	Lumen Technologies, Inc. 2 awardees, including Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers	$10,691,301	7.6%	Rank history: #10 in FY2021, #10 in FY2022, #5 in FY2024 and not on the FY2025 list; up 6 since FY2022.
5	Securamerica, LLC Through American Security Programs Inc. Top NAICS codes 561612 Security Guards and Patrol Services	$7,838,251	5.6%	Rank history: #3 in FY2021, not on the FY2022 list, #6 in FY2024 and not on the FY2025 list; returned.
6	Buchanan & Edwards, Inc. Top NAICS codes 541512 Computer Systems Design Services	$6,766,260	4.8%	Rank history: #6 in FY2021, #3 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
7	Insight Public Sector Inc. 2 awardees Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services	$4,092,905	2.9%	Rank history: #5 in FY2021, #5 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
8	Serco North America (Holdings) Inc 2 awardees, including Serco Inc. Top NAICS codes 611710 Educational Support Services	$2,882,185	2.0%	Rank history: #8 in FY2021, #12 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
9	Jacobs Engineering Group Inc. Top NAICS codes 541330 Engineering Services	$2,510,087	1.8%	Rank history: #14 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
10	James G Davis Construction Corp Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,986,968	1.4%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2024 and #14 in FY2025; new.
11	New TECH Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$1,970,102	1.4%	Rank history: #9 in FY2021, #8 in FY2022, #13 in FY2024 and #37 in FY2025; down 3 since FY2022.
12	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top NAICS codes 519190 All Other Information Services	$1,949,578	1.4%	Rank history: not on the FY2021 list, #11 in FY2022, #11 in FY2024 and not on the FY2025 list; down 1 since FY2022.
13	Four LLC Top NAICS codes 541519 Other Computer Related Services	$1,866,880	1.3%	Rank history: #19 in FY2021, #34 in FY2022, #12 in FY2024 and #16 in FY2025; up 21 since FY2022.
14	Versar Inc. Through Versar Security Systems, LLC Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$1,853,638	1.3%	Rank history: #21 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
15	The Building People LLC Top NAICS codes 561210 Facilities Support Services 541614 Process, Physical Distribution, and Logistics Consulting Services	$1,745,785	1.2%	Rank history: #22 in FY2021, #23 in FY2022, #20 in FY2024 and #28 in FY2025; up 8 since FY2022.
16	Govsmart, Inc. Top NAICS codes 541519 Other Computer Related Services	$1,716,340	1.2%	Rank history: #12 in FY2021, #15 in FY2022, #10 in FY2024 and #15 in FY2025; down 1 since FY2022.
17	Hamilton Pacific Chamberlain LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,594,443	1.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
18	Meltech Corporation, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$1,434,216	1.0%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2024 and not on the FY2025 list; new.
19	Arcadis N.V. Top NAICS codes 541330 Engineering Services	$1,403,440	1.0%	Rank history: #11 in FY2021, #17 in FY2022, #22 in FY2024 and not on the FY2025 list; down 2 since FY2022.
20	August Schell Enterprises, Inc. Top NAICS codes 541519 Other Computer Related Services	$1,295,584	0.9%	Rank history: #15 in FY2021, #14 in FY2022, #26 in FY2024 and #11 in FY2025; down 6 since FY2022.
21	Software Information Resource Corp. 2 awardees Top NAICS codes 541519 Other Computer Related Services	$1,255,323	0.9%	Rank history: #23 in FY2021, not on the FY2022 list, #77 in FY2024 and #44 in FY2025; returned.
22	Sikich CPA LLC Top NAICS codes 541211 Offices of Certified Public Accountants	$1,185,306	0.8%	Rank history: #7 in FY2021, #25 in FY2022, #17 in FY2024 and #18 in FY2025; up 3 since FY2022.
23	Kpmg L.L.P. Top NAICS codes 541211 Offices of Certified Public Accountants	$1,084,704	0.8%	Rank history: not on the FY2021 list, #22 in FY2022, #23 in FY2024 and not on the FY2025 list; down 1 since FY2022.
24	Thomson Reuters (Tax & Accounting) Inc. 2 awardees, including West Publishing Corporation Top NAICS codes 519190 All Other Information Services	$1,068,121	0.8%	Rank history: #17 in FY2021, #18 in FY2022, #44 in FY2024 and #51 in FY2025; down 6 since FY2022.
25	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 334111 Electronic Computer Manufacturing	$1,015,068	0.7%	Rank history: #16 in FY2021, #21 in FY2022, #15 in FY2024 and #17 in FY2025; down 4 since FY2022.
26	Regan Technologies Corp Top NAICS codes 541519 Other Computer Related Services	$998,865	0.7%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and #22 in FY2025; new.
27	Scribedoc.com, Inc. Top NAICS codes 541512 Computer Systems Design Services	$926,838	0.7%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and not on the FY2025 list; new.
28	Lumen Technologies Government Solutions, Inc. Top NAICS codes 517110 Wired Telecommunications Carriers	$900,191	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
29	Verizon Communications Inc. 3 awardees, including Verizon Federal Inc. and Cellco Partnership Top NAICS codes 517919 All Other Telecommunications 517312 Wireless Telecommunications Carriers (except Satellite)	$846,342	0.6%	Rank history: #13 in FY2021, #24 in FY2022, #39 in FY2024 and not on the FY2025 list; down 5 since FY2022.
30	Mythics, LLC Through Emergent, LLC Top NAICS codes 541519 Other Computer Related Services	$704,970	0.5%	Rank history: #44 in FY2021, #19 in FY2022, #25 in FY2024 and #29 in FY2025; down 11 since FY2022.
31	Chickasaw Health Consulting, LLC Top NAICS codes 541612 Human Resources Consulting Services	$664,277	0.5%	Rank history: #20 in FY2021, #26 in FY2022, not on the FY2024 list and #56 in FY2025; down 5 since FY2022.
32	CDW Corporation Through CDW Government LLC Top NAICS codes 334111 Electronic Computer Manufacturing 541519 Other Computer Related Services	$633,888	0.4%	Rank history: #25 in FY2021, #58 in FY2022, #93 in FY2024 and not on the FY2025 list; up 26 since FY2022.
33	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$632,636	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
34	Proquest LLC Top NAICS codes 519190 All Other Information Services	$598,905	0.4%	Rank history: #24 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
35	Ebsco Industries Inc. 2 awardees Top NAICS codes 519190 All Other Information Services	$597,938	0.4%	Rank history: #26 in FY2021, #29 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
36	Diversified Sign Language Services, LLC Top NAICS codes 541930 Translation and Interpretation Services	$594,114	0.4%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and #32 in FY2025; new.
37	Karcher Group Incorporated Top NAICS codes 334290 Other Communications Equipment Manufacturing	$583,610	0.4%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2024 and #76 in FY2025; new.
38	Executive Information Systems, L.L.C. Top NAICS codes 541519 Other Computer Related Services	$519,841	0.4%	Rank history: #31 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
39	Skillsoft Corporation Through Skillsoft (Us) LLC Top NAICS codes 511210 Software Publishers	$494,055	0.4%	Rank history: #46 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
40	Goldman Edwards Inc. Top NAICS codes 541519 Other Computer Related Services	$482,080	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Leadership Connect, Inc. Top NAICS codes 511140 Directory and Mailing List Publishers 519190 All Other Information Services	$437,250	0.3%	Rank history: #39 in FY2021, #38 in FY2022, #43 in FY2024 and #36 in FY2025; down 3 since FY2022.
42	Black Knight Data & Analytics LLC Top NAICS codes 541910 Marketing Research and Public Opinion Polling	$435,000	0.3%	Rank history: #50 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
43	Disys Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$408,425	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 89 since FY2022.
44	Insi Cloud Inc Top NAICS codes 541511 Custom Computer Programming Services	$408,000	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
45	Fiscalnote, Inc. Through Cq-Roll Call, Inc. Top NAICS codes 519190 All Other Information Services	$407,988	0.3%	Rank history: #38 in FY2021, #41 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
46	Gartner, Inc. Top NAICS codes 519120 Libraries and Archives	$405,227	0.3%	Rank history: #33 in FY2021, #33 in FY2022, #34 in FY2024 and #46 in FY2025; down 13 since FY2022.
47	Washington Metropolitan Area Transit Authority Top NAICS codes 485111 Mixed Mode Transit Systems	$405,000	0.3%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2024 and #41 in FY2025; new.
48	Sterling Computers Corporation Top NAICS codes 541519 Other Computer Related Services	$375,974	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Converge Networks Corporation Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$370,598	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	Optiv Federal Inc. Top NAICS codes 541513 Computer Facilities Management Services	$368,293	0.3%	Rank history: #42 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
51	H.i.g. Capital Management Inc. Through Iron Bow Technologies, LLC Top NAICS codes 541519 Other Computer Related Services	$332,369	0.2%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
52	Factset Research Systems Inc. Top NAICS codes 519290 Web Search Portals and All Other Information Services	$330,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and not on the FY2025 list; new.
53	Fedex Corp Through Federal Express Corporation Top NAICS codes 492110 Couriers and Express Delivery Services	$312,000	0.2%	Rank history: #75 in FY2021, #64 in FY2022, #56 in FY2024 and #66 in FY2025; up 11 since FY2022.
54	Transource Services Corp Top NAICS codes 541519 Other Computer Related Services	$306,337	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
55	Calloway & Associates, Inc. Top NAICS codes 541519 Other Computer Related Services	$283,313	0.2%	Rank history: #48 in FY2021, #50 in FY2022, #65 in FY2024 and not on the FY2025 list; down 5 since FY2022.
56	National Academy of Sciences Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$279,130	0.2%	Rank history: #47 in FY2021, #30 in FY2022, #31 in FY2024 and not on the FY2025 list; down 26 since FY2022.
57	Tyler Technologies, Inc. Through Tyler Federal, LLC Top NAICS codes 511210 Software Publishers 541512 Computer Systems Design Services	$278,598	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #73 in FY2024 and #57 in FY2025; up 21 since FY2022.
58	Victory Global Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$273,684	0.2%	Rank history: not on the FY2021 list, #44 in FY2022, #48 in FY2024 and not on the FY2025 list; down 14 since FY2022.
59	Sinclair Broadcast Group Inc. Through Politico, LLC Top NAICS codes 519190 All Other Information Services 519130 Internet Publishing and Broadcasting and Web Search Portals	$270,832	0.2%	Rank history: #56 in FY2021, #52 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
60	Agilquest Corporation Top NAICS codes 541519 Other Computer Related Services	$266,076	0.2%	Rank history: #45 in FY2021, #51 in FY2022, #50 in FY2024 and #48 in FY2025; down 9 since FY2022.
61	Trigent Solutions Inc. Top NAICS codes 541430 Graphic Design Services	$233,686	0.2%	Rank history: #35 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
62	Red River Technology LLC 2 awardees, including Distributed Technology Group LLC Top NAICS codes 541519 Other Computer Related Services	$221,951	0.2%	Rank history: #51 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
63	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, #54 in FY2024 and #85 in FY2025; down 9 since FY2022.
64	Cliftonlarsonallen LLP Top NAICS codes 541219 Other Accounting Services	$193,817	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and not on the FY2025 list; new.
65	Sunplus Data Group Inc. Top NAICS codes 561320 Temporary Help Services	$165,048	0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and not on the FY2025 list; new.
66	Opencorporates Holding Ltd Through Opencorporates Ltd Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$164,531	0.1%	Rank history: not on the FY2021–FY2022 lists, #62 in FY2024 and #55 in FY2025; new.
67	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, #61 in FY2024 and #54 in FY2025; down 2 since FY2022.
68	Flywheel Data LLC Top NAICS codes 541519 Other Computer Related Services	$158,799	0.1%	Rank history: not on the FY2021 list, #53 in FY2022, #36 in FY2024 and #31 in FY2025; down 15 since FY2022.
69	Mcgraw Hill Financial Inc. Through S&P Global Market Intelligence LLC Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$152,475	0.1%	Rank history: #43 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 32 since FY2022.
70	Tvar Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$131,369	0.1%	Rank history: #67 in FY2021, #63 in FY2022, #68 in FY2024 and not on the FY2025 list; down 7 since FY2022.
71	Crest Craft Co Top NAICS codes 339999 All Other Miscellaneous Manufacturing	$119,137	0.1%	Rank history: not on the FY2021 list, #72 in FY2022, not on the FY2024 list and #71 in FY2025; up 1 since FY2022.
72	Vantage Human Resource Services, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$117,870	0.1%	Rank history: #63 in FY2021, #88 in FY2022 and not on the FY2024–FY2025 lists; up 16 since FY2022.
73	Bloomberg LP 2 awardees, including Bloomberg Finance LP and Bloomberg Industry Group, Inc. Top NAICS codes 519190 All Other Information Services	$115,588	0.1%	Rank history: #54 in FY2021, #57 in FY2022, #88 in FY2024 and #70 in FY2025; down 16 since FY2022.
74	JDG Associates Ltd Top NAICS codes 541612 Human Resources Consulting Services	$114,000	0.1%	Rank history: #58 in FY2021, #55 in FY2022, #53 in FY2024 and not on the FY2025 list; down 19 since FY2022.
75	Accelera Solutions Inc. Top NAICS codes 541519 Other Computer Related Services	$112,450	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Business Products Group Inc Top NAICS codes 541519 Other Computer Related Services	$101,182	0.1%	Rank history: not on the FY2021 list, #39 in FY2022, #37 in FY2024 and not on the FY2025 list; down 37 since FY2022.
77	Self Governance Communication & Education Tribal Consortium Inc 2 awardees Top NAICS codes 813920 Professional Organizations	$95,609	0.1%	Rank history: #78 in FY2021, #85 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
78	Relx Inc. 3 awardees, including Elsevier B.V. Top NAICS codes 519190 All Other Information Services	$93,974	0.1%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and #33 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 FY2024 and not on the FY2025 list; down 5 since FY2022.
80	Inside Washington Publishers LLC Top NAICS codes 519190 All Other Information Services	$86,000	0.1%	Rank history: #74 in FY2021, #75 in FY2022, #76 in FY2024 and #61 in FY2025; down 5 since FY2022.
81	Coley & Associates, Inc. Top NAICS codes 541519 Other Computer Related Services	$81,013	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #80 in FY2024 and #64 in FY2025; down 10 since FY2022.
82	Presidio Government Solutions LLC Top NAICS codes 541519 Other Computer Related Services	$75,962	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Stuart B. Consultants, Inc. Top NAICS codes 541930 Translation and Interpretation Services	$75,751	0.1%	Rank history: #30 in FY2021, #31 in FY2022 and not on the FY2024–FY2025 lists; down 52 since FY2022.
84	Wingswept, LLC Top NAICS codes 511210 Software Publishers	$73,697	0.1%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2024 and #78 in FY2025; new.
85	Ricoh Company,Ltd. Through Ricoh USA Inc. Top NAICS codes 333315 Photographic and Photocopying Equipment Manufacturing	$73,573	0.1%	Rank history: #36 in FY2021, #32 in FY2022, #74 in FY2024 and #69 in FY2025; down 53 since FY2022.
86	Tax Analysts Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$70,446	<0.1%	Rank history: #80 in FY2021, #79 in FY2022, #81 in FY2024 and #65 in FY2025; down 7 since FY2022.
87	ACG Systems, Inc. Top NAICS codes 334290 Other Communications Equipment Manufacturing	$67,160	<0.1%	Rank history: #79 in FY2021, #80 in FY2022, not on the FY2024 list and #58 in FY2025; down 7 since FY2022.
88	Burrelle's Information Services, LLC Top NAICS codes 519190 All Other Information Services	$66,555	<0.1%	Rank history: not on the FY2021 list, #81 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
89	DUN & Bradstreet Inc. Top NAICS codes 519190 All Other Information Services	$66,524	<0.1%	Rank history: #76 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
90	Cynuria Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$60,728	<0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #75 in FY2024 and not on the FY2025 list; down 4 since FY2022.
91	Wolters Kluwer N.V. Through CCH Incorporated Top NAICS codes 519130 Internet Publishing and Broadcasting and Web Search Portals	$55,797	<0.1%	Rank history: #87 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
92	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top NAICS codes 332999 All Other Miscellaneous Fabricated Metal Product Manufacturing	$47,811	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Heritage Reporting Corporation Top NAICS codes 561320 Temporary Help Services	$46,085	<0.1%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2024 and not on the FY2025 list; up 18 since FY2022.
94	National Institute of Transition Planning, Inc. Top NAICS codes 541612 Human Resources Consulting Services	$46,000	<0.1%	Rank history: #86 in FY2021, #92 in FY2022, not on the FY2024 list and #84 in FY2025; down 2 since FY2022.
95	Caseware USA Inc. Top NAICS codes 511210 Software Publishers	$43,073	<0.1%	Rank history: #95 in FY2021, #95 in FY2022, #92 in FY2024 and not on the FY2025 list; unchanged since FY2022.
96	Reed Elsevier Inc. Through Lnrs Data Services Inc. Top NAICS codes 488190 Other Support Activities for Air Transportation	$40,430	<0.1%	Rank history: #68 in FY2021, #70 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
97	Healthequity, Inc. Top NAICS codes 524292 Pharmacy Benefit Management and Other Third Party Administration of Insurance and Pension Funds	$40,118	<0.1%	Rank history: #85 in FY2021, #84 in FY2022, #91 in FY2024 and #94 in FY2025; down 13 since FY2022.
98	Unison Virtual Acquisition Office LLC Top NAICS codes 519190 All Other Information Services	$39,500	<0.1%	Rank history: #94 in FY2021, #97 in FY2022, #85 in FY2024 and #72 in FY2025; down 1 since FY2022.
99	Asterion LLC Top NAICS codes 213112 Support Activities for Oil and Gas Operations	$39,375	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	Goodwill Easter Seals Miami Valley Top NAICS codes 561720 Janitorial Services	$38,075	<0.1%	Rank history: #98 in FY2021, #98 in FY2022, #96 in FY2024 and not on the FY2025 list; down 2 since FY2022.

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100 of 135 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 $141 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 FY2023?

1. Advanced Technology Systems Inc. ($31M), 2. Emcor Group Inc. ($14.2M), 3. Four Points Technology, L.L.C. ($12.9M), 4. Lumen Technologies, Inc. ($10.7M), 5. Securamerica, LLC ($7.84M), 6. Buchanan & Edwards, Inc. ($6.77M), 7. Insight Public Sector Inc. ($4.09M), 8. Serco North America (Holdings) Inc ($2.88M), 9. Jacobs Engineering Group Inc. ($2.51M), 10. James G Davis Construction Corp ($1.99M).

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