Top 100 Contractors in NAICS 334513: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables, FY2025

Name: Top 100 Contractors in NAICS 334513: Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 44% of FY2025 NAICS 334513 contract dollars

Contract obligations: $221,269,039 Net of deobligations, by contracts coded NAICS 334513
Contractors: 698 Parent companies with an obligation
Largest contractor: D-2 Incorporated $40.7 million, 18.0% of obligations
Data as of: Oct 23, 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	D-2 Incorporated Top agencies Army (Department of the Army)	$40,674,906	18.0%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; up 3 since FY2024.
2	L3Harris Technologies, Inc. 3 awardees, including L3Harris Maritime Services Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$12,084,854	5.3%	Rank history: #4 in FY2021, #7 in FY2022, #2 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	Optex Systems, Inc. Top agencies Army (Department of the Army)	$8,629,682	3.8%	Rank history: not on the FY2021–FY2024 lists; new.
4	OTT Hydromet Corp Top agencies DOI (Department of the Interior)	$7,632,530	3.4%	Rank history: not on the FY2021–FY2024 lists; new.
5	Nag, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$6,498,034	2.9%	Rank history: #8 in FY2021, #9 in FY2022, #12 in FY2023 and #38 in FY2024; up 33 since FY2024.
6	YSI Inc. 2 awardees Top agencies DOI (Department of the Interior) Army (Department of the Army) Commerce (Department of Commerce)	$5,529,256	2.4%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; up 6 since FY2024.
7	Undersea Sensor Systems Inc. Through Ultra Electronics Ice Inc. Top agencies Navy (Department of the Navy)	$5,449,500	2.4%	Rank history: not on the FY2021–FY2024 lists; new.
8	Onto Innovation Inc. Through Nanometrics Inc. Top agencies DOI (Department of the Interior)	$4,981,039	2.2%	Rank history: #12 in FY2021, #10 in FY2022, #10 in FY2023 and #11 in FY2024; up 3 since FY2024.
9	Howell Instruments, Inc. Top agencies USAF (Department of the Air Force)	$4,581,380	2.0%	Rank history: #9 in FY2021, #13 in FY2022, #28 in FY2023 and #27 in FY2024; up 18 since FY2024.
10	Keysight Technologies, Inc. 3 awardees, including Spirent Federal Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) Commerce (Department of Commerce)	$3,684,752	1.6%	Rank history: #45 in FY2021, not on the FY2022 list, #5 in FY2023 and #5 in FY2024; down 5 since FY2024.
11	Korry Electronics Co Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$3,518,725	1.6%	Rank history: not on the FY2021–FY2024 lists; new.
12	Mensor, LP. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$3,251,438	1.4%	Rank history: not on the FY2021–FY2024 lists; up 430 since FY2024.
13	Comperipherals Incorporated Top agencies DLA (Defense Logistics Agency)	$3,226,290	1.4%	Rank history: not on the FY2021–FY2023 lists and #91 in FY2024; up 78 since FY2024.
14	Campbell Scientific Inc. 2 awardees, including Meter Group Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Army (Department of the Army)	$3,047,607	1.3%	Rank history: #11 in FY2021, #12 in FY2022, #6 in FY2023 and #7 in FY2024; down 7 since FY2024.
15	Compuflow Solutions LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,939,233	1.3%	Rank history: #67 in FY2021 and not on the FY2022–FY2024 lists; up 92 since FY2024.
16	Teledyne Flir Unmanned Ground Systems Inc 5 awardees, including Teledyne Instruments, Inc., Teledyne Flir Commercial Systems Inc. and Teledyne Brown Engineering, Inc. Top agencies DOI (Department of the Interior) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,867,734	1.3%	Rank history: #25 in FY2021, #16 in FY2022, #7 in FY2023 and #44 in FY2024; up 28 since FY2024.
17	Emerson Electric Co 4 awardees, including Rosemount Specialty Products LLC, Micro Motion, Inc. and Emerson Process Management Power & Water Solutions, Inc. Top agencies DLA (Defense Logistics Agency) USDA (Department of Agriculture) DOE (Department of Energy)	$2,628,894	1.2%	Rank history: #32 in FY2021, #21 in FY2022, #95 in FY2023 and #10 in FY2024; down 7 since FY2024.
18	Kulite Semiconductor Products Inc. Top agencies DLA (Defense Logistics Agency)	$2,477,258	1.1%	Rank history: #22 in FY2021, #22 in FY2022, #63 in FY2023 and #14 in FY2024; down 4 since FY2024.
19	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$2,463,427	1.1%	Rank history: #38 in FY2021, #25 in FY2022, #18 in FY2023 and #19 in FY2024; unchanged since FY2024.
20	Marine Electric Systems Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$2,458,017	1.1%	Rank history: #36 in FY2021, #40 in FY2022, #46 in FY2023 and #29 in FY2024; up 9 since FY2024.
21	Uusi, LLC Top agencies DLA (Defense Logistics Agency)	$2,456,345	1.1%	Rank history: #42 in FY2021, #11 in FY2022, #31 in FY2023 and #30 in FY2024; up 9 since FY2024.
22	ABB Inc 2 awardees Top agencies USAF (Department of the Air Force)	$2,277,082	1.0%	Rank history: not on the FY2021–FY2024 lists; up 457 since FY2024.
23	Biomerieux Inc. Top agencies VA (Department of Veterans Affairs)	$2,259,179	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
24	Danaher Corporation 2 awardees, including Hach Company and Cepheid Top agencies DOI (Department of the Interior) HHS (Department of Health and Human Services) Army (Department of the Army)	$2,251,776	1.0%	Rank history: #5 in FY2021, #4 in FY2022, #1 in FY2023 and #8 in FY2024; down 16 since FY2024.
25	Lockheed Martin Corporation 2 awardees, including Lockheed Martin Sippican, Inc. Top agencies DLA (Defense Logistics Agency)	$2,134,844	0.9%	Rank history: #2 in FY2021, #1 in FY2022 and not on the FY2023–FY2024 lists; returned.
26	Gammon Technical Products Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$1,885,744	0.8%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2024; up 13 since FY2024.
27	BEI Precision Systems & Space Company, Inc. Top agencies DLA (Defense Logistics Agency)	$1,848,947	0.8%	Rank history: not on the FY2021–FY2024 lists; up 84 since FY2024.
28	Mason Electric Co. 3 awardees, including King Nutronics Corporation and Testvonics Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$1,684,459	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
29	Fortive Corporation 3 awardees, including Fluke Electronics Corp and Landauer, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Commerce (Department of Commerce)	$1,578,580	0.7%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; down 12 since FY2024.
30	Analytical Science and Technologies Group Inc. Top agencies DLA (Defense Logistics Agency)	$1,482,510	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
31	King Nutronics Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,460,582	0.6%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2023 and #9 in FY2024; down 22 since FY2024.
32	FTS Forest Technology Systems Ltd. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$1,403,121	0.6%	Rank history: #17 in FY2021, #17 in FY2022, #11 in FY2023 and #16 in FY2024; down 16 since FY2024.
33	In-Situ, Inc. Top agencies DOI (Department of the Interior)	$1,251,480	0.6%	Rank history: #31 in FY2021, #35 in FY2022, #9 in FY2023 and #43 in FY2024; up 10 since FY2024.
34	The Gordian Group, Inc. Through R.s. Means Company LLC Top agencies Army (Department of the Army)	$1,242,980	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
35	Standard Calibrations Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$1,242,360	0.5%	Rank history: not on the FY2021 list, #78 in FY2022, #52 in FY2023 and #32 in FY2024; down 3 since FY2024.
36	EOI Inc. Top agencies VA (Department of Veterans Affairs)	$1,220,227	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
37	Southwest Research Institute Top agencies DLA (Defense Logistics Agency)	$1,096,430	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
38	Cameron Energy Services Corp. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,069,360	0.5%	Rank history: not on the FY2021 list, #53 in FY2022, #16 in FY2023 and #97 in FY2024; up 59 since FY2024.
39	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$1,003,242	0.4%	Rank history: #50 in FY2021, #44 in FY2022, #45 in FY2023 and #74 in FY2024; up 35 since FY2024.
40	Ametek Inc. 7 awardees, including Faro Technologies Inc., Sunpower, Inc. and Atlas Material Testing Technology L.L.C. Top agencies Navy (Department of the Navy) DOJ (Department of Justice) DHS (Department of Homeland Security)	$973,578	0.4%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and not on the FY2024 list; up 100 since FY2024.
41	Chand, L.L.C. Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$877,013	0.4%	Rank history: not on the FY2021–FY2024 lists; up 107 since FY2024.
42	The Entwistle Company LLC Top agencies DLA (Defense Logistics Agency)	$844,480	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
43	Ruta Supplies Inc. Top agencies DLA (Defense Logistics Agency)	$827,716	0.4%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2024; down 1 since FY2024.
44	Vishay Precision Group, Inc. Through Pacific Instruments, Inc. Top agencies USAF (Department of the Air Force)	$793,951	0.4%	Rank history: not on the FY2021 list, #39 in FY2022, #26 in FY2023 and not on the FY2024 list; returned.
45	MMC Metrology Lab, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$780,385	0.3%	Rank history: #53 in FY2021, #73 in FY2022, #60 in FY2023 and #57 in FY2024; up 12 since FY2024.
46	Triman Industries Inc. 2 awardees, including Brighton Cromwell LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$771,048	0.3%	Rank history: #44 in FY2021, not on the FY2022 list, #87 in FY2023 and #13 in FY2024; down 33 since FY2024.
47	R P M Supply Corporation Top agencies DLA (Defense Logistics Agency)	$723,834	0.3%	Rank history: not on the FY2021–FY2024 lists; up 108 since FY2024.
48	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$718,235	0.3%	Rank history: #30 in FY2021, #80 in FY2022, #93 in FY2023 and #46 in FY2024; down 2 since FY2024.
49	Willrich Precision Instrument Company, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$714,947	0.3%	Rank history: not on the FY2021–FY2024 lists; up 144 since FY2024.
50	ECI Defense Group, Inc. Top agencies DLA (Defense Logistics Agency)	$704,475	0.3%	Rank history: not on the FY2021–FY2024 lists; up 346 since FY2024.
51	GI Corporation Top agencies DLA (Defense Logistics Agency)	$700,803	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
52	Tactair Fluid Controls Inc 2 awardees, including Arkwin Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$629,851	0.3%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 40 since FY2024.
53	Atec Inc. Top agencies DLA (Defense Logistics Agency)	$616,061	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
54	Heico Corp 2 awardees, including Seal Dynamics LLC and Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$609,690	0.3%	Rank history: not on the FY2021–FY2024 lists; up 253 since FY2024.
55	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$609,273	0.3%	Rank history: not on the FY2021 list, #87 in FY2022, #65 in FY2023 and #88 in FY2024; up 33 since FY2024.
56	Paragon Robotics LLC Top agencies HHS (Department of Health and Human Services)	$609,138	0.3%	Rank history: #27 in FY2021, #26 in FY2022, #30 in FY2023 and #31 in FY2024; down 25 since FY2024.
57	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$606,059	0.3%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2024; up 20 since FY2024.
58	Linseis Inc. Top agencies Army (Department of the Army)	$584,698	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
59	L.b.i., Inc. Top agencies Navy (Department of the Navy)	$573,344	0.3%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; down 12 since FY2024.
60	Spectrum Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$573,340	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
61	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$555,519	0.2%	Rank history: #61 in FY2021, not on the FY2022 list, #64 in FY2023 and not on the FY2024 list; up 47 since FY2024.
62	Innovasea Marine Systems Canada Inc. Top agencies Commerce (Department of Commerce) Army (Department of the Army)	$551,050	0.2%	Rank history: not on the FY2021 list, #37 in FY2022, #15 in FY2023 and #20 in FY2024; down 42 since FY2024.
63	Rees Scientific Corporation Top agencies DHA (Defense Health Agency) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$545,434	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
64	Kinemetrics Inc Top agencies DOI (Department of the Interior)	$522,940	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
65	IEC Infrared Systems LLC Top agencies USAF (Department of the Air Force)	$519,911	0.2%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; up 14 since FY2024.
66	RTX Corporation 3 awardees, including Sensitech Inc. and Simmonds Precision Products Inc. Top agencies DLA (Defense Logistics Agency)	$504,295	0.2%	Rank history: not on the FY2021–FY2024 lists; up 211 since FY2024.
67	Hexagon Manufacturing Intelligence Inc. Top agencies Navy (Department of the Navy) Commerce (Department of Commerce) USAF (Department of the Air Force)	$495,138	0.2%	Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; down 6 since FY2024.
68	J-Tec Associates, Inc. Top agencies Army (Department of the Army)	$484,008	0.2%	Rank history: not on the FY2021–FY2024 lists; up 143 since FY2024.
69	SP Industries Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$472,406	0.2%	Rank history: not on the FY2021–FY2024 lists; up 408 since FY2024.
70	TSI Incorporated Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHA (Defense Health Agency)	$469,580	0.2%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2024; down 25 since FY2024.
71	Outdoor Venture Corp Through Ovc-Engineered Solutions LLC Top agencies DLA (Defense Logistics Agency)	$452,997	0.2%	Rank history: not on the FY2021–FY2024 lists; up 53 since FY2024.
72	Trijay Systems Inc. Top agencies Treasury (Department of the Treasury)	$449,628	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
73	Ccon Inc. Top agencies Navy (Department of the Navy)	$443,125	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
74	Trillamed LLC Top agencies VA (Department of Veterans Affairs)	$434,731	0.2%	Rank history: #40 in FY2021, not on the FY2022 list, #88 in FY2023 and not on the FY2024 list; up 59 since FY2024.
75	Woodward, Inc. Top agencies Navy (Department of the Navy)	$427,430	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
76	BBP Sales, LLC Top agencies DOI (Department of the Interior)	$421,329	0.2%	Rank history: not on the FY2021–FY2024 lists; up 81 since FY2024.
77	Dela Technology Corporation Top agencies DLA (Defense Logistics Agency)	$409,325	0.2%	Rank history: not on the FY2021–FY2024 lists; up 182 since FY2024.
78	Eaton Corporation Public Limited Company Through Mission Systems Davenport Inc. Top agencies Navy (Department of the Navy)	$405,313	0.2%	Rank history: not on the FY2021 list, #77 in FY2022 and not on the FY2023–FY2024 lists; returned.
79	Mesa Laboratories Inc. Top agencies DOL (Department of Labor) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$400,144	0.2%	Rank history: #85 in FY2021, #93 in FY2022 and not on the FY2023–FY2024 lists; up 37 since FY2024.
80	Atap Inc. Top agencies Navy (Department of the Navy)	$397,332	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
81	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$388,753	0.2%	Rank history: not on the FY2021–FY2024 lists; up 28 since FY2024.
82	Parker-Hannifin Corporation 2 awardees, including Meggitt (Orange County), Inc. Top agencies DLA (Defense Logistics Agency)	$378,090	0.2%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2024; down 15 since FY2024.
83	Aerospace Control Products, Inc. Top agencies Navy (Department of the Navy)	$361,600	0.2%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and not on the FY2024 list; up 244 since FY2024.
84	R & B Designs, L.L.C. Top agencies DLA (Defense Logistics Agency)	$361,269	0.2%	Rank history: not on the FY2021 list, #65 in FY2022, not on the FY2023 list and #69 in FY2024; down 15 since FY2024.
85	Chase Supply, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$354,665	0.2%	Rank history: not on the FY2021 list, #70 in FY2022, #38 in FY2023 and not on the FY2024 list; up 18 since FY2024.
86	Klaus Becker GMBH Top agencies USAF (Department of the Air Force)	$354,396	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
87	Apothem, Inc. Top agencies Navy (Department of the Navy)	$341,945	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
88	Balance Technology Inc. Top agencies USAF (Department of the Air Force)	$336,685	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Sofar Ocean Technologies, Inc. Top agencies Navy (Department of the Navy)	$336,307	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
90	Sihalla Zakaria Top agencies DOI (Department of the Interior) Army (Department of the Army)	$332,898	0.1%	Rank history: not on the FY2021–FY2024 lists; up 23 since FY2024.
91	Rockwell Automation, Inc. Top agencies Army (Department of the Army)	$327,839	0.1%	Rank history: not on the FY2021 list, #51 in FY2022 and not on the FY2023–FY2024 lists; up 198 since FY2024.
92	Transupport Inc. Top agencies DLA (Defense Logistics Agency)	$325,680	0.1%	Rank history: not on the FY2021–FY2024 lists; up 20 since FY2024.
93	Arctic Slope Regional Corporation Through Asrc Federal Facilities Logistics, LLC Top agencies DLA (Defense Logistics Agency)	$320,198	0.1%	Rank history: not on the FY2021–FY2024 lists; up 54 since FY2024.
94	Fairmount Automation Inc Top agencies Navy (Department of the Navy)	$313,382	0.1%	Rank history: not on the FY2021–FY2024 lists; up 123 since FY2024.
95	Global Logistics Strategies Inc. Top agencies DLA (Defense Logistics Agency)	$310,984	0.1%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; down 77 since FY2024.
96	Scanivalve Corp Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$307,037	0.1%	Rank history: #96 in FY2021, not on the FY2022 list, #84 in FY2023 and not on the FY2024 list; up 81 since FY2024.
97	Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$301,152	0.1%	Rank history: #60 in FY2021 and not on the FY2022–FY2024 lists; returned.
98	AGM Container Controls Inc. Top agencies DLA (Defense Logistics Agency)	$300,887	0.1%	Rank history: not on the FY2021 list, #98 in FY2022, not on the FY2023 list and #87 in FY2024; down 11 since FY2024.
99	Pacific Gyre Top agencies Navy (Department of the Navy)	$300,494	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
100	Measurements International Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$297,700	0.1%	Rank history: not on the FY2021–FY2024 lists; up 204 since FY2024.

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100 of 698 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 $226 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2025 ran Oct 1, 2024 – Sep 30, 2025. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2024. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2024 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 334513 contractors in FY2025?

1. D-2 Incorporated ($40.7M), 2. L3Harris Technologies, Inc. ($12.1M), 3. Optex Systems, Inc. ($8.63M), 4. OTT Hydromet Corp ($7.63M), 5. Nag, LLC ($6.5M), 6. YSI Inc. ($5.53M), 7. Undersea Sensor Systems Inc. ($5.45M), 8. Onto Innovation Inc. ($4.98M), 9. Howell Instruments, Inc. ($4.58M), 10. Keysight Technologies, Inc. ($3.68M).

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