Top 100 Nuclear Regulatory Commission Contractors, FY2023

Name: Top 100 Nuclear Regulatory Commission 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 47% of FY2023 Nuclear Regulatory Commission contract dollars

Contract obligations: $184,895,943 Net of deobligations, by the Nuclear Regulatory Commission and its offices
Contractors: 293 Parent companies with an obligation
Largest contractor: Teksynap Corporation $27.9 million, 14.5% 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	Teksynap Corporation Top NAICS codes 541512 Computer Systems Design Services	$27,852,846	14.5%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Leidos Holdings, Inc. Through Leidos, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$17,372,445	9.1%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Oasis Systems, LLC Top NAICS codes 541519 Other Computer Related Services	$10,382,289	5.4%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2024 and #3 in FY2025; up 1 since FY2022.
4	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top NAICS codes 541519 Other Computer Related Services	$9,474,215	4.9%	Rank history: #3 in FY2021, #3 in FY2022, #24 in FY2024 and not on the FY2025 list; down 1 since FY2022.
5	Northramp LLC 2 awardees Top NAICS codes 541511 Custom Computer Programming Services	$4,668,167	2.4%	Rank history: #5 in FY2021, #9 in FY2022, #10 in FY2024 and #8 in FY2025; up 4 since FY2022.
6	Southwest Research Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 562211 Hazardous Waste Treatment and Disposal	$4,586,071	2.4%	Rank history: #8 in FY2021, #11 in FY2022, #7 in FY2024 and #21 in FY2025; up 5 since FY2022.
7	Dell Federal Systems L.P. 2 awardees, including Dell Marketing L.P. Top NAICS codes 511210 Software Publishers	$4,255,445	2.2%	Rank history: #7 in FY2021, #6 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
8	Nve, Inc. Top NAICS codes 561210 Facilities Support Services	$3,999,000	2.1%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and #12 in FY2025; new.
9	Advanced Systems Technology & Management Inc. Top NAICS codes 541330 Engineering Services	$3,972,103	2.1%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2024 and #44 in FY2025; new.
10	Aegis.net, Inc. Top NAICS codes 541519 Other Computer Related Services	$3,314,400	1.7%	Rank history: #6 in FY2021, #10 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
11	Information Systems Laboratories Inc. 2 awardees Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541330 Engineering Services 513199 All Other Publishers	$3,113,616	1.6%	Rank history: #17 in FY2021, #19 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
12	Blue TECH Inc. Top NAICS codes 541519 Other Computer Related Services	$3,042,563	1.6%	Rank history: not on the FY2021 list, #23 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
13	Exelon Corporation Through Potomac Electric Power Co Top NAICS codes 221122 Electric Power Distribution	$2,965,621	1.5%	Rank history: not on the FY2021 list, #22 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
14	MCP Computer Products Inc. Top NAICS codes 334111 Electronic Computer Manufacturing 443120 Computer and Software Stores	$2,776,880	1.4%	Rank history: #14 in FY2021, #7 in FY2022, #13 in FY2024 and #17 in FY2025; down 7 since FY2022.
15	Koniag Management Solutions LLC Top NAICS codes 541519 Other Computer Related Services	$2,760,811	1.4%	Rank history: #26 in FY2021, #13 in FY2022, #26 in FY2024 and #57 in FY2025; down 2 since FY2022.
16	Disys Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$2,535,577	1.3%	Rank history: not on the FY2021 list, #21 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
17	Gcr-Dean LLC Top NAICS codes 561210 Facilities Support Services	$2,239,500	1.2%	Rank history: not on the FY2021 list, #18 in FY2022, #21 in FY2024 and #19 in FY2025; up 1 since FY2022.
18	Tower Facility Management, LLC Top NAICS codes 561210 Facilities Support Services	$2,084,774	1.1%	Rank history: #12 in FY2021, #14 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
19	Huron Consulting Group Incorporated Through Huron Consulting Services LLC Top NAICS codes 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$2,056,300	1.1%	Rank history: #25 in FY2021, #15 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
20	Verizon Communications Inc. 6 awardees, including Verizon Business Network Services LLC, Cellco Partnership and Verizon Pennsylvania LLC Top NAICS codes 517110 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers (except Satellite) 517111 Wired Telecommunications Carriers	$2,038,799	1.1%	Rank history: #9 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
21	ATP Gov, LLC Top NAICS codes 541519 Other Computer Related Services	$1,903,905	1.0%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #24 in FY2025; new.
22	Immersive Concepts L.L.C. Top NAICS codes 541519 Other Computer Related Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$1,895,865	1.0%	Rank history: #21 in FY2021, #16 in FY2022, #16 in FY2024 and #9 in FY2025; down 6 since FY2022.
23	CTG Federal, LLC Top NAICS codes 541519 Other Computer Related Services	$1,798,304	0.9%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and #16 in FY2025; new.
24	Four LLC Top NAICS codes 541519 Other Computer Related Services	$1,741,056	0.9%	Rank history: #20 in FY2021, #29 in FY2022, #5 in FY2024 and #10 in FY2025; up 5 since FY2022.
25	R I Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$1,524,610	0.8%	Rank history: not on the FY2021 list, #40 in FY2022, #17 in FY2024 and #32 in FY2025; up 15 since FY2022.
26	Thomas Scientific LLC Through Unison Software Inc. Top NAICS codes 511210 Software Publishers	$1,321,329	0.7%	Rank history: #15 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
27	Gunnison Consulting Group Inc. Through G2Sf LLC Top NAICS codes 541513 Computer Facilities Management Services	$1,320,040	0.7%	Rank history: not on the FY2021 list, #68 in FY2022, #72 in FY2024 and not on the FY2025 list; up 41 since FY2022.
28	Energy Research Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541330 Engineering Services	$1,179,595	0.6%	Rank history: not on the FY2021 list, #66 in FY2022, #34 in FY2024 and #98 in FY2025; up 38 since FY2022.
29	Business Management Associates Inc. Top NAICS codes 541612 Human Resources Consulting Services	$1,140,000	0.6%	Rank history: #32 in FY2021, #30 in FY2022, #87 in FY2024 and #36 in FY2025; up 1 since FY2022.
30	Eagle Integrated Services, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,139,574	0.6%	Rank history: #46 in FY2021, #25 in FY2022, #39 in FY2024 and #56 in FY2025; down 5 since FY2022.
31	Numark Associates, Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$1,122,831	0.6%	Rank history: #56 in FY2021, #75 in FY2022, #51 in FY2024 and #60 in FY2025; up 44 since FY2022.
32	Mythics, LLC Through Emergent, LLC Top NAICS codes 541519 Other Computer Related Services	$1,112,402	0.6%	Rank history: #16 in FY2021, #20 in FY2022, #35 in FY2024 and #26 in FY2025; down 12 since FY2022.
33	SD Solutions LLC Top NAICS codes 541618 Other Management Consulting Services	$1,110,191	0.6%	Rank history: #39 in FY2021, #81 in FY2022, #46 in FY2024 and #40 in FY2025; up 48 since FY2022.
34	Infinetix Inc. Top NAICS codes 541519 Other Computer Related Services	$1,101,150	0.6%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2024 and #52 in FY2025; new.
35	Code Plus, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$1,056,743	0.6%	Rank history: #48 in FY2021, #32 in FY2022, #41 in FY2024 and #72 in FY2025; down 3 since FY2022.
36	Software Information Resource Corp Top NAICS codes 541519 Other Computer Related Services	$1,023,959	0.5%	Rank history: not on the FY2021 list, #43 in FY2022, #80 in FY2024 and #39 in FY2025; up 7 since FY2022.
37	Oak Ridge Associated Universities, Incorporated Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,023,403	0.5%	Rank history: #36 in FY2021, #28 in FY2022, #22 in FY2024 and #34 in FY2025; down 9 since FY2022.
38	Data Systems Analysts Inc. Through Project Performance Company, LLC Top NAICS codes 541511 Custom Computer Programming Services	$1,010,759	0.5%	Rank history: #42 in FY2021, #33 in FY2022, #99 in FY2024 and not on the FY2025 list; down 5 since FY2022.
39	Clark Baty Associates Inc. Top NAICS codes 541519 Other Computer Related Services	$989,136	0.5%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and #41 in FY2025; new.
40	Cliftonlarsonallen LLP Top NAICS codes 541219 Other Accounting Services	$979,205	0.5%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and not on the FY2025 list; new.
41	The Building People LLC Top NAICS codes 541310 Architectural Services 541511 Custom Computer Programming Services	$954,262	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Thundercat Technology LLC Top NAICS codes 541519 Other Computer Related Services	$926,914	0.5%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2024 and #43 in FY2025; up 114 since FY2022.
43	ICF International, Inc. Through ICF Incorporated, L.L.C. Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541611 Administrative Management and General Management Consulting Services	$899,765	0.5%	Rank history: #33 in FY2021, #31 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
44	Bahfed Corp Top NAICS codes 541519 Other Computer Related Services	$859,002	0.4%	Rank history: #44 in FY2021, not on the FY2022 list, #31 in FY2024 and #48 in FY2025; up 167 since FY2022.
45	Kikiktagruk Inupiat Corp Through Midnight Sun Technologies LLC Top NAICS codes 561110 Office Administrative Services 541611 Administrative Management and General Management Consulting Services	$840,000	0.4%	Rank history: #64 in FY2021, #48 in FY2022, not on the FY2024 list and #49 in FY2025; up 3 since FY2022.
46	Renaissance Code Development LLC Top NAICS codes 541511 Custom Computer Programming Services	$829,260	0.4%	Rank history: #82 in FY2021, #82 in FY2022, #79 in FY2024 and #42 in FY2025; up 36 since FY2022.
47	Asrc Federal Data Networx, LLC Top NAICS codes 517919 All Other Telecommunications	$820,000	0.4%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
48	Carahsoft Technology Corp Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541519 Other Computer Related Services	$809,905	0.4%	Rank history: #54 in FY2021, #46 in FY2022, #37 in FY2024 and #51 in FY2025; down 2 since FY2022.
49	Puyenpa Services, LLC Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$806,000	0.4%	Rank history: not on the FY2021 list, #17 in FY2022, #20 in FY2024 and not on the FY2025 list; down 32 since FY2022.
50	Translation Excellence Inc. Top NAICS codes 541930 Translation and Interpretation Services	$800,000	0.4%	Rank history: #99 in FY2021, #45 in FY2022, #40 in FY2024 and #29 in FY2025; down 5 since FY2022.
51	The Chenega Corporation 3 awardees, including Chenega Healthcare Services LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$783,954	0.4%	Rank history: #19 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
52	4 Star Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$781,824	0.4%	Rank history: #63 in FY2021, #52 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
53	Enterprise Technology Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$701,356	0.4%	Rank history: #49 in FY2021, #50 in FY2022, #94 in FY2024 and #91 in FY2025; down 3 since FY2022.
54	At&T Inc. 3 awardees, including At&T Enterprises, LLC, Pacific Bell Telephone Company and Att Mobility LLC Top NAICS codes 517110 Wired Telecommunications Carriers 517311 Wired Telecommunications Carriers 517312 Wireless Telecommunications Carriers (except Satellite)	$689,963	0.4%	Rank history: not on the FY2021 list, #61 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
55	Cube Root Corporation Top NAICS codes 541513 Computer Facilities Management Services	$654,180	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	Pacific Research & Evaluation LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$648,428	0.3%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; new.
57	Red Heritage Media LLC Top NAICS codes 561410 Document Preparation Services 611430 Professional and Management Development Training	$605,000	0.3%	Rank history: #57 in FY2021, #85 in FY2022, not on the FY2024 list and #97 in FY2025; up 28 since FY2022.
58	V3Gate, LLC Top NAICS codes 541519 Other Computer Related Services	$601,477	0.3%	Rank history: not on the FY2021 list, #73 in FY2022, #47 in FY2024 and #47 in FY2025; up 15 since FY2022.
59	Integration Technologies Group, Inc. Top NAICS codes 541519 Other Computer Related Services	$591,106	0.3%	Rank history: #62 in FY2021, #55 in FY2022, #63 in FY2024 and not on the FY2025 list; down 4 since FY2022.
60	Eagle Health, LLC Top NAICS codes 621498 All Other Outpatient Care Centers	$581,000	0.3%	Rank history: not on the FY2021 list, #34 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
61	Beckman & Associates Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$569,676	0.3%	Rank history: #74 in FY2021, #35 in FY2022, #68 in FY2024 and #65 in FY2025; down 26 since FY2022.
62	Redhawk It Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$563,282	0.3%	Rank history: not on the FY2021 list, #64 in FY2022, #89 in FY2024 and not on the FY2025 list; up 2 since FY2022.
63	CJW Contractors, Inc. Top NAICS codes 236220 Commercial and Institutional Building Construction	$552,151	0.3%	Rank history: not on the FY2021 list, #5 in FY2022, #6 in FY2024 and not on the FY2025 list; down 58 since FY2022.
64	Neal R. Gross and Company, Inc. Top NAICS codes 561492 Court Reporting and Stenotype Services	$550,000	0.3%	Rank history: #53 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
65	JBS Financial Services, Inc. Top NAICS codes 541519 Other Computer Related Services	$548,223	0.3%	Rank history: not on the FY2021 list, #57 in FY2022, #70 in FY2024 and not on the FY2025 list; down 8 since FY2022.
66	Mcgraw Hill Financial Inc. Through S&P Global Inc. Top NAICS codes 513120 Periodical Publishers	$547,203	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 36 since FY2022.
67	Sterling Computers Corporation Top NAICS codes 334111 Electronic Computer Manufacturing	$545,976	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 153 since FY2022.
68	Engineering Mechanics Corporation of Columbus Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$540,000	0.3%	Rank history: #41 in FY2021, #41 in FY2022, #48 in FY2024 and #67 in FY2025; down 27 since FY2022.
69	Price Modern LLC Top NAICS codes 337214 Office Furniture (except Wood) Manufacturing	$515,417	0.3%	Rank history: #22 in FY2021, #44 in FY2022, #60 in FY2024 and not on the FY2025 list; down 25 since FY2022.
70	Exitech Corporation Top NAICS codes 541519 Other Computer Related Services	$510,360	0.3%	Rank history: #66 in FY2021, #79 in FY2022, #73 in FY2024 and #63 in FY2025; up 9 since FY2022.
71	VET Advisor LLC Through Three Wire Systems, LLC Top NAICS codes 541519 Other Computer Related Services	$506,451	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 84 since FY2022.
72	Pathfinder Consultants, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$500,132	0.3%	Rank history: #68 in FY2021, #76 in FY2022, #58 in FY2024 and #79 in FY2025; up 4 since FY2022.
73	Science Applications International Corporation Top NAICS codes 541519 Other Computer Related Services	$487,880	0.3%	Rank history: not on the FY2021–FY2022 lists, #45 in FY2024 and not on the FY2025 list; new.
74	NCC Group Inc. Through NCC Group Security Services, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541690 Other Scientific and Technical Consulting Services	$487,814	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Marcom Group, Inc. Top NAICS codes 541820 Public Relations Agencies	$470,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 41 since FY2022.
76	OCT Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$455,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2024 and #46 in FY2025; up 65 since FY2022.
77	The Pennsylvania State University Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$450,000	0.2%	Rank history: #65 in FY2021, #72 in FY2022, #53 in FY2024 and #73 in FY2025; down 5 since FY2022.
78	Baxter Hodell Donnelly Preston Inc. Top NAICS codes 541310 Architectural Services	$447,962	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Institute of Nuclear Power Operations, Inc. Top NAICS codes 541330 Engineering Services	$443,799	0.2%	Rank history: #73 in FY2021, #70 in FY2022, #50 in FY2024 and not on the FY2025 list; down 9 since FY2022.
80	Colossal Contracting LLC Top NAICS codes 541519 Other Computer Related Services	$414,375	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #84 in FY2025; up 57 since FY2022.
81	Green Powered Technology LLC Top NAICS codes 561410 Document Preparation Services	$397,850	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and #68 in FY2025; new.
82	Ratp DEV USA Inc. 3 awardees, including Corys Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$383,027	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 110 since FY2022.
83	Tyson Project Management Group LLC Top NAICS codes 561210 Facilities Support Services	$371,000	0.2%	Rank history: not on the FY2021 list, #86 in FY2022, #54 in FY2024 and #70 in FY2025; up 3 since FY2022.
84	Sharp Solutions Inc. Top NAICS codes 541512 Computer Systems Design Services	$363,000	0.2%	Rank history: not on the FY2021 list, #90 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
85	Ains, LLC Top NAICS codes 541519 Other Computer Related Services	$360,577	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 55 since FY2022.
86	Chainbridge Solutions Incorporated Top NAICS codes 541511 Custom Computer Programming Services	$359,941	0.2%	Rank history: #51 in FY2021, #59 in FY2022 and not on the FY2024–FY2025 lists; down 27 since FY2022.
87	Regents of the University of Michigan Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$350,412	0.2%	Rank history: #69 in FY2021, not on the FY2022 list, #97 in FY2024 and #100 in FY2025; up 19 since FY2022.
88	Archaeologic Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services	$349,887	0.2%	Rank history: #91 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
89	Competitive Innovations LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$349,186	0.2%	Rank history: #31 in FY2021, #65 in FY2022, #83 in FY2024 and not on the FY2025 list; down 24 since FY2022.
90	Equinix, Inc. Top NAICS codes 541519 Other Computer Related Services	$338,551	0.2%	Rank history: not on the FY2021 list, #84 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
91	Clason Point Partners Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$332,405	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #88 in FY2025; up 79 since FY2022.
92	Dynamic Business Group, Inc. Top NAICS codes 519190 All Other Information Services	$330,700	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #99 in FY2025; up 25 since FY2022.
93	Countertrade Products, Inc. Top NAICS codes 541519 Other Computer Related Services	$318,235	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #86 in FY2025; new.
94	Kaptivate LLC Top NAICS codes 541612 Human Resources Consulting Services	$311,600	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	August Schell Enterprises, Inc. Top NAICS codes 541519 Other Computer Related Services	$308,819	0.2%	Rank history: #87 in FY2021, not on the FY2022 list, #67 in FY2024 and #45 in FY2025; up 33 since FY2022.
96	Vantage Human Resource Services, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$307,630	0.2%	Rank history: #100 in FY2021, #95 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
97	Aqiwo, Inc. Top NAICS codes 541512 Computer Systems Design Services	$290,338	0.2%	Rank history: #78 in FY2021, #78 in FY2022 and not on the FY2024–FY2025 lists; down 19 since FY2022.
98	Turning Point Global Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$283,861	0.1%	Rank history: not on the FY2021 list, #92 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
99	New TECH Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$279,799	0.1%	Rank history: #79 in FY2021, #51 in FY2022, #33 in FY2024 and #30 in FY2025; down 48 since FY2022.
100	Aquila Fitness Consulting Systems Ltd Top NAICS codes 713940 Fitness and Recreational Sports Centers	$265,000	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #81 in FY2025; up 5 since FY2022.

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100 of 293 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 $192 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 Nuclear Regulatory Commission contractors in FY2023?

1. Teksynap Corporation ($27.9M), 2. Leidos Holdings, Inc. ($17.4M), 3. Oasis Systems, LLC ($10.4M), 4. CGI Technologies and Solutions Inc. ($9.47M), 5. Northramp LLC ($4.67M), 6. Southwest Research Institute ($4.59M), 7. Dell Federal Systems L.P. ($4.26M), 8. Nve, Inc. ($4M), 9. Advanced Systems Technology & Management Inc. ($3.97M), 10. Aegis.net, Inc. ($3.31M).

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