Top 100 Contractors in NAICS 334517: Irradiation Apparatus Manufacturing, FY2023

Name: Top 100 Contractors in NAICS 334517: Irradiation Apparatus Manufacturing, FY2023
Creator: GovTribe

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

The top 10 won 86% of FY2023 NAICS 334517 contract dollars

Contract obligations: $772,456,419 Net of deobligations, by contracts coded NAICS 334517
Contractors: 128 Parent companies with an obligation
Largest contractor: Siemens Aktiengesellschaft $229 million, 28.1% 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	Siemens Aktiengesellschaft 2 awardees, including Siemens Medical Solutions Usa, Inc. and Varian Medical Systems, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$228,760,323	28.1%	Rank history: #2 in FY2021, #1 in FY2022, #7 in FY2024 and not on the FY2025 list; unchanged since FY2022.
2	General Electric Company 5 awardees, including GE Precision Healthcare LLC, OEC Medical Systems, Inc. and GE Healthcare Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) DOJ (Department of Justice)	$181,842,709	22.3%	Rank history: #4 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Koninklijke Philips N.V. 3 awardees, including Philips North America LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Army (Department of the Army)	$108,937,960	13.4%	Rank history: #5 in FY2021, #3 in FY2022, #5 in FY2024 and #46 in FY2025; unchanged since FY2022.
4	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. and Leidos Security Detection & Automation, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$53,096,207	6.5%	Rank history: #3 in FY2021, #9 in FY2022, not on the FY2024 list and #6 in FY2025; up 5 since FY2022.
5	Smiths Detection Inc Top agencies DHS (Department of Homeland Security)	$28,590,026	3.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	OSI Systems Inc. 2 awardees, including Rapiscan Systems Inc. and American Science & Engineering Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$27,648,169	3.4%	Rank history: #1 in FY2021, #8 in FY2022, #20 in FY2024 and not on the FY2025 list; up 2 since FY2022.
7	Smiths Group PLC 2 awardees, including Smiths Detection Inc. Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture) DOJ (Department of Justice)	$26,199,853	3.2%	Rank history: #7 in FY2021, #4 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
8	Hologic, Inc. 2 awardees, including Hologic Sales and Service, LLC Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency) DHA (Defense Health Agency)	$21,775,834	2.7%	Rank history: #9 in FY2021, #5 in FY2022, #24 in FY2024 and #91 in FY2025; down 3 since FY2022.
9	Westinghouse Electric Company LLC Through Westinghouse Government Services LLC Top agencies DOE (Department of Energy)	$15,568,775	1.9%	Rank history: #8 in FY2021, #6 in FY2022, #13 in FY2024 and not on the FY2025 list; down 3 since FY2022.
10	Viewray, Inc. Top agencies VA (Department of Veterans Affairs)	$8,890,846	1.1%	Rank history: not on the FY2021 list, #7 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
11	Illinois Tool Works Inc. 2 awardees, including North Star Imaging Incorporated and QSA Global Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$5,009,576	0.6%	Rank history: #54 in FY2021, #24 in FY2022, #22 in FY2024 and #18 in FY2025; up 13 since FY2022.
12	The Kretchmer Corporation Through Minxray Inc. Top agencies DLA (Defense Logistics Agency) Smithsonian (Smithsonian Institution)	$4,886,049	0.6%	Rank history: not on the FY2021 list, #91 in FY2022, #77 in FY2024 and not on the FY2025 list; up 79 since FY2022.
13	Riverain Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$4,491,032	0.6%	Rank history: #20 in FY2021, #78 in FY2022, #28 in FY2024 and #22 in FY2025; up 65 since FY2022.
14	Analogic Corporation Through BK Medical Holding Company, Inc. Top agencies VA (Department of Veterans Affairs)	$4,251,459	0.5%	Rank history: #12 in FY2021, #10 in FY2022, #16 in FY2024 and not on the FY2025 list; down 4 since FY2022.
15	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies USAF (Department of the Air Force)	$4,201,995	0.5%	Rank history: not on the FY2021 list, #54 in FY2022 and not on the FY2024–FY2025 lists; up 39 since FY2022.
16	V.j. Technologies, Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$4,015,872	0.5%	Rank history: #24 in FY2021, #16 in FY2022, #29 in FY2024 and #15 in FY2025; unchanged since FY2022.
17	Biosensors International Group Ltd. Through Spectrum Dynamics Medical, Inc. Top agencies VA (Department of Veterans Affairs) DLA (Defense Logistics Agency)	$3,607,583	0.4%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2024 and #20 in FY2025; new.
18	Novo DR Inc. Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$3,060,176	0.4%	Rank history: not on the FY2021 list, #28 in FY2022, not on the FY2024 list and #80 in FY2025; up 10 since FY2022.
19	Astrophysics Inc. Top agencies DHS (Department of Homeland Security) Treasury (Department of the Treasury) DOJ (Department of Justice)	$3,000,080	0.4%	Rank history: #6 in FY2021, #65 in FY2022, #12 in FY2024 and #8 in FY2025; up 46 since FY2022.
20	Shimadzu Corporation 2 awardees, including Shimadzu Precision Instruments, Inc. Top agencies VA (Department of Veterans Affairs)	$2,585,614	0.3%	Rank history: #22 in FY2021, #38 in FY2022, #44 in FY2024 and not on the FY2025 list; up 18 since FY2022.
21	Fuji Photo Film Company Limited (0000) Through Fujifilm Healthcare Americas Corp Top agencies VA (Department of Veterans Affairs)	$2,359,623	0.3%	Rank history: #28 in FY2021, #18 in FY2022, #70 in FY2024 and not on the FY2025 list; down 3 since FY2022.
22	Dornier Medtech America Inc. Top agencies DLA (Defense Logistics Agency)	$2,173,371	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
23	BNC Corp. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$1,573,240	0.2%	Rank history: #18 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
24	L3Harris Technologies, Inc. Through Fisica Applied Technologies, Inc. Top agencies WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$1,454,234	0.2%	Rank history: #23 in FY2021, #31 in FY2022, #17 in FY2024 and #24 in FY2025; up 7 since FY2022.
25	J.L Shepherd and Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$1,414,910	0.2%	Rank history: #16 in FY2021, #17 in FY2022, #76 in FY2024 and #35 in FY2025; down 8 since FY2022.
26	Mediso Usa, LLC Top agencies USUHS (DOD Uniformed Services University of the Health Sciences)	$1,317,392	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Alko Enterprises Inc. Top agencies HHS (Department of Health and Human Services)	$1,306,893	0.2%	Rank history: not on the FY2021 list, #72 in FY2022, #18 in FY2024 and #48 in FY2025; up 45 since FY2022.
28	DEL Medical Inc. Top agencies DLA (Defense Logistics Agency)	$1,279,361	0.2%	Rank history: not on the FY2021 list, #44 in FY2022, #36 in FY2024 and not on the FY2025 list; up 16 since FY2022.
29	Marietta Nondestructive Testing LLC Top agencies Navy (Department of the Navy)	$1,112,000	0.1%	Rank history: #52 in FY2021, not on the FY2022 list, not on the FY2024 list and #13 in FY2025; returned.
30	Hopewell Designs, Inc. Top agencies Navy (Department of the Navy)	$1,106,258	0.1%	Rank history: #14 in FY2021, #15 in FY2022, #23 in FY2024 and #28 in FY2025; down 15 since FY2022.
31	Varex Imaging Corp 2 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$1,092,573	0.1%	Rank history: #39 in FY2021, #40 in FY2022, #37 in FY2024 and #42 in FY2025; up 9 since FY2022.
32	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$1,060,056	0.1%	Rank history: #36 in FY2021, #32 in FY2022, #73 in FY2024 and #44 in FY2025; unchanged since FY2022.
33	Accuray Incorporated Top agencies VA (Department of Veterans Affairs)	$1,042,945	0.1%	Rank history: #40 in FY2021, #37 in FY2022, #38 in FY2024 and #17 in FY2025; up 4 since FY2022.
34	Red Heritage Medical LLC Top agencies HHS (Department of Health and Human Services)	$979,011	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #57 in FY2025; new.
35	Foss Therapy Services, Inc. Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$894,178	0.1%	Rank history: not on the FY2021 list, #20 in FY2022, #46 in FY2024 and #66 in FY2025; down 15 since FY2022.
36	Varian Medical Systems, Inc. Top agencies DHA (Defense Health Agency)	$869,116	0.1%	Rank history: #10 in FY2021, #55 in FY2022, #25 in FY2024 and #27 in FY2025; up 19 since FY2022.
37	MPM Products, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$765,172	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
38	DGA Medical LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$671,270	0.1%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2024 and #75 in FY2025; new.
39	Pen-Link, Ltd Top agencies DHS (Department of Homeland Security)	$650,427	0.1%	Rank history: not on the FY2021–FY2022 lists, #33 in FY2024 and not on the FY2025 list; new.
40	Sirtex Medical Inc. Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$543,055	0.1%	Rank history: #33 in FY2021, #56 in FY2022, #39 in FY2024 and not on the FY2025 list; up 16 since FY2022.
41	Native Diagnostic Imaging LLC Top agencies HHS (Department of Health and Human Services)	$477,698	0.1%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and not on the FY2025 list; new.
42	B2H Consulting Group LLC Top agencies VA (Department of Veterans Affairs)	$431,400	0.1%	Rank history: #66 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
43	Brainlab AG Top agencies VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$413,759	0.1%	Rank history: #31 in FY2021, #19 in FY2022, #34 in FY2024 and #25 in FY2025; down 24 since FY2022.
44	Airbus DS Military Aircraft Inc. Through Dornier Medtech America, Inc. Top agencies VA (Department of Veterans Affairs)	$395,548	<0.1%	Rank history: not on the FY2021–FY2022 lists, #30 in FY2024 and #26 in FY2025; new.
45	BK Medical Holding Company, Inc. Top agencies VA (Department of Veterans Affairs)	$369,422	<0.1%	Rank history: not on the FY2021 list, #14 in FY2022, #26 in FY2024 and #14 in FY2025; down 31 since FY2022.
46	Nanovea, Inc. Through Micro Photonics Inc. Top agencies Commerce (Department of Commerce)	$365,000	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
47	KUB Technologies Inc. Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$356,410	<0.1%	Rank history: #84 in FY2021, #27 in FY2022, #47 in FY2024 and #47 in FY2025; down 20 since FY2022.
48	Mirion Technologies (CANBERRA) Inc. 2 awardees, including Sun Nuclear Corp. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$346,032	<0.1%	Rank history: not on the FY2021 list, #30 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
49	L1 Enterprises Incorporated Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$345,357	<0.1%	Rank history: not on the FY2021 list, #75 in FY2022, not on the FY2024 list and #38 in FY2025; up 26 since FY2022.
50	Agfa Healthcare Corporation 2 awardees, including Agfa US Corp Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) GSA (General Services Administration)	$316,726	<0.1%	Rank history: #44 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
51	GEO-MED LLC Top agencies VA (Department of Veterans Affairs)	$263,431	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
52	Best Theratronics Inc. Top agencies DHA (Defense Health Agency)	$242,637	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	Newco Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$224,050	<0.1%	Rank history: #51 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 58 since FY2022.
54	Roper Technologies, Inc. 2 awardees, including Medtec LLC and Verathon Inc. Top agencies VA (Department of Veterans Affairs)	$215,684	<0.1%	Rank history: not on the FY2021 list, #100 in FY2022 and not on the FY2024–FY2025 lists; up 46 since FY2022.
55	Point Security Inc. Top agencies DOJ (Department of Justice) DOT (Department of Transportation)	$213,053	<0.1%	Rank history: #71 in FY2021, not on the FY2022 list, #31 in FY2024 and #58 in FY2025; up 53 since FY2022.
56	Videray Technologies Inc Top agencies DHS (Department of Homeland Security) DOE (Department of Energy)	$206,350	<0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2024 and not on the FY2025 list; new.
57	Marathon Medical Corporation Top agencies VA (Department of Veterans Affairs)	$202,201	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
58	Foresight Imaging LLC Top agencies VA (Department of Veterans Affairs)	$201,800	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
59	Elekta AB (PUBL) 2 awardees, including Elekta Inc. Top agencies VA (Department of Veterans Affairs)	$197,757	<0.1%	Rank history: #85 in FY2021, #41 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
60	Alliant Enterprises, LLC Top agencies VA (Department of Veterans Affairs)	$174,960	<0.1%	Rank history: not on the FY2021 list, #22 in FY2022, #45 in FY2024 and #43 in FY2025; down 38 since FY2022.
61	Meak Solutions Llc. Top agencies VA (Department of Veterans Affairs)	$168,510	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
62	Raysearch Americas Inc. Top agencies VA (Department of Veterans Affairs)	$163,242	<0.1%	Rank history: #38 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
63	Spectrum Dynamics Medical Inc Top agencies VA (Department of Veterans Affairs)	$162,160	<0.1%	Rank history: #19 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 50 since FY2022.
64	Creative Electron Inc. Top agencies USAF (Department of the Air Force)	$151,400	<0.1%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2024 and not on the FY2025 list; new.
65	Scintica Inc. Top agencies VA (Department of Veterans Affairs)	$146,500	<0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2024 and not on the FY2025 list; new.
66	Avenue Home Care Inc Top agencies VA (Department of Veterans Affairs)	$140,690	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Viken Detection Corporation Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$139,166	<0.1%	Rank history: #11 in FY2021, #71 in FY2022, #67 in FY2024 and #21 in FY2025; up 4 since FY2022.
68	Onex Corporation Through Carestream Health, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$132,318	<0.1%	Rank history: #37 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
69	Excel Imaging Solutions, LLC Top agencies VA (Department of Veterans Affairs)	$126,050	<0.1%	Rank history: #78 in FY2021, #62 in FY2022, #59 in FY2024 and #64 in FY2025; down 7 since FY2022.
70	Proto Manufacturing, Inc. Top agencies Navy (Department of the Navy)	$123,450	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Canon Inc. Through Canon Medical Systems Usa, Inc. Top agencies VA (Department of Veterans Affairs)	$122,747	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	US Testing Equipment Ltd Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$121,154	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	Golden Engineering, Inc. Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$115,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2024 and #62 in FY2025; new.
74	Triton Light Medical LLC Top agencies VA (Department of Veterans Affairs)	$111,098	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Glomax, Inc. Top agencies VA (Department of Veterans Affairs)	$105,546	<0.1%	Rank history: not on the FY2021 list, #74 in FY2022, #74 in FY2024 and #68 in FY2025; down 1 since FY2022.
76	JTM Enterprises LLC Top agencies DOI (Department of the Interior)	$102,300	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Atec Inc. Top agencies Navy (Department of the Navy)	$101,267	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
78	1ST American Medical Distributors, Inc. Top agencies VA (Department of Veterans Affairs)	$90,720	<0.1%	Rank history: #32 in FY2021, #34 in FY2022, not on the FY2024 list and #76 in FY2025; down 44 since FY2022.
79	Rad Source Technologies, Inc. Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$85,975	<0.1%	Rank history: #35 in FY2021, #96 in FY2022 and not on the FY2024–FY2025 lists; up 17 since FY2022.
80	IBA Dosimetry America Inc. Top agencies VA (Department of Veterans Affairs)	$85,546	<0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2024 and #87 in FY2025; new.
81	Planmeca U.S.a. Inc Top agencies VA (Department of Veterans Affairs)	$84,495	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	Redhawk Group International, LLC Top agencies VA (Department of Veterans Affairs)	$76,168	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Z & Z Medical, Inc. Top agencies VA (Department of Veterans Affairs)	$73,706	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #72 in FY2025; new.
84	Flint Machine Tools, Inc. Top agencies Army (Department of the Army)	$71,667	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	Glenbrook Technologies Inc. Top agencies VA (Department of Veterans Affairs)	$68,000	<0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2024 and not on the FY2025 list; new.
86	Anholt Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$67,485	<0.1%	Rank history: #80 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 15 since FY2022.
87	Autoclear LLC Top agencies Army (Department of the Army)	$65,354	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 23 since FY2022.
88	Sustainment Technologies, LLC Top agencies VA (Department of Veterans Affairs)	$62,489	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	Televere Systems, LLC Top agencies USAF (Department of the Air Force)	$55,250	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
90	Gamma Products Inc. Top agencies Army (Department of the Army)	$50,300	<0.1%	Rank history: #82 in FY2021, #86 in FY2022, #53 in FY2024 and #69 in FY2025; down 4 since FY2022.
91	Global Solutions SRL Top agencies DOS (Department of State)	$46,308	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Spurs Marine Manufacturing Inc. Top agencies Navy (Department of the Navy)	$44,736	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Bayer Corporation Through Bayer Healthcare LLC Top agencies VA (Department of Veterans Affairs)	$44,719	<0.1%	Rank history: #75 in FY2021, #87 in FY2022, #86 in FY2024 and not on the FY2025 list; down 6 since FY2022.
94	Ah & Associates L.l.c Top agencies VA (Department of Veterans Affairs)	$40,081	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	Bravo Inc Top agencies VA (Department of Veterans Affairs)	$37,455	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Veterans Healthcare Supply Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$33,871	<0.1%	Rank history: #45 in FY2021, not on the FY2022 list, #83 in FY2024 and not on the FY2025 list; returned.
97	Spec150, LLC Top agencies NRC (Nuclear Regulatory Commission)	$30,500	<0.1%	Rank history: #89 in FY2021, #80 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
98	Kodex, Inc. Top agencies DHS (Department of Homeland Security)	$29,685	<0.1%	Rank history: #43 in FY2021, #53 in FY2022, not on the FY2024 list and #37 in FY2025; down 45 since FY2022.
99	Wisecom Technologies Inc. Top agencies DHS (Department of Homeland Security)	$28,134	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	Hokte LLC Top agencies HHS (Department of Health and Human Services)	$25,540	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 128 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 $815 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 NAICS 334517 contractors in FY2023?

1. Siemens Aktiengesellschaft ($229M), 2. General Electric Company ($182M), 3. Koninklijke Philips N.V. ($109M), 4. Leidos Holdings, Inc. ($53.1M), 5. Smiths Detection Inc ($28.6M), 6. OSI Systems Inc. ($27.6M), 7. Smiths Group PLC ($26.2M), 8. Hologic, Inc. ($21.8M), 9. Westinghouse Electric Company LLC ($15.6M), 10. Viewray, Inc. ($8.89M).

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