Top 49 Contractors in PSC 6636: Environmental Chambers and Related Equipment, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Calspan Technology Holding Corporation Through North Wind Test LLC Top agencies USAF (Department of the Air Force)	$5,479,732	41.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
2	The Durbin Group LLC Top agencies Navy (Department of the Navy)	$1,200,000	9.0%	Rank history: #4 in FY2021, #2 in FY2022, #4 in FY2024 and not on the FY2025 list; unchanged since FY2022.
3	Kapteyn-Murnane Laboratories, Inc. Top agencies Commerce (Department of Commerce)	$1,197,700	9.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
4	Venturedyne Ltd Top agencies Navy (Department of the Navy) Treasury (Department of the Treasury)	$883,140	6.6%	Rank history: #7 in FY2021, #4 in FY2022, #1 in FY2024 and not on the FY2025 list; unchanged since FY2022.
5	Spectris PLC Through Hottinger Bruel & Kjaer Inc. Top agencies Navy (Department of the Navy)	$718,125	5.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	PPG Industries, Inc. Top agencies USAF (Department of the Air Force)	$406,267	3.0%	Rank history: not on the FY2021 list, #7 in FY2022, #14 in FY2024 and #6 in FY2025; up 1 since FY2022.
7	Russells Technical Products Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$404,063	3.0%	Rank history: #2 in FY2021, #5 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
8	Chase Supply, Inc. Top agencies Navy (Department of the Navy)	$359,256	2.7%	Rank history: not on the FY2021 list, #34 in FY2022, #6 in FY2024 and not on the FY2025 list; up 26 since FY2022.
9	Laser Techniques Company, LLC Top agencies Army (Department of the Army)	$346,121	2.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
10	Team Corporation Top agencies Navy (Department of the Navy)	$345,429	2.6%	Rank history: #1 in FY2021, #28 in FY2022, #22 in FY2024 and not on the FY2025 list; up 18 since FY2022.
11	Trieskey Mechanical, Inc. Top agencies Army (Department of the Army)	$270,003	2.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
12	Emulate Inc. Top agencies HHS (Department of Health and Human Services)	$213,100	1.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
13	Darwin Chambers Co LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$199,340	1.5%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and #9 in FY2025; new.
14	Percival Scientific Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$139,021	1.0%	Rank history: #11 in FY2021, #20 in FY2022, #11 in FY2024 and #2 in FY2025; up 6 since FY2022.
15	Scientemp Corp Top agencies Army (Department of the Army)	$125,000	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
16	Inert Corporation Top agencies NARA (National Archives and Records Administration) NASA (National Aeronautics and Space Administration)	$101,405	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
17	Ora Inc. Top agencies Army (Department of the Army)	$72,269	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
18	Anaerobe Systems Top agencies HHS (Department of Health and Human Services)	$71,940	0.5%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2024 and not on the FY2025 list; new.
19	Nvision Solutions Inc. Top agencies Navy (Department of the Navy)	$71,197	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
20	Thunder Scientific Corp Top agencies DLA (Defense Logistics Agency)	$63,051	0.5%	Rank history: #8 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
21	Mcfall Consulting Inc. Top agencies USAF (Department of the Air Force)	$62,212	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
22	Ludwig Schunk Stiftung E.V. Through Weiss Technik North America, Inc. Top agencies Army (Department of the Army)	$60,591	0.5%	Rank history: #6 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
23	SPX Corporation Through TPS LLC Top agencies Army (Department of the Army)	$60,473	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Advanced Technologies, Inc. Top agencies Navy (Department of the Navy)	$41,940	0.3%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2024 and not on the FY2025 list; new.
25	CEM Holdings Corporation Through CEM Corporation Top agencies USDA (Department of Agriculture)	$38,612	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
26	So-Low Environmental Equipment, Co Top agencies DHS (Department of Homeland Security)	$33,936	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Olympus America Inc Top agencies Navy (Department of the Navy)	$33,605	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	Wrigglesworth Enterprises Inc. Top agencies USAF (Department of the Air Force)	$26,015	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #25 in FY2025; new.
29	Unholtz-Dickie Corp Top agencies Navy (Department of the Navy)	$25,950	0.2%	Rank history: not on the FY2021 list, #1 in FY2022 and not on the FY2024–FY2025 lists; down 28 since FY2022.
30	Digi International Inc. Top agencies DHA (Defense Health Agency)	$24,442	0.2%	Rank history: not on the FY2021 list, #37 in FY2022, #47 in FY2024 and #29 in FY2025; up 7 since FY2022.
31	Mohawk Lifts LLC Top agencies USAF (Department of the Air Force)	$22,327	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Government Scientific Source Inc. Top agencies Smithsonian (Smithsonian Institution)	$21,439	0.2%	Rank history: not on the FY2021 list, #39 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
33	Unifire Inc Top agencies USAF (Department of the Air Force)	$20,884	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
34	Sheldon Manufacturing, Inc. Top agencies VA (Department of Veterans Affairs)	$19,902	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
35	FMS Engineering LLC Top agencies Navy (Department of the Navy)	$18,829	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	Controlled Environments Inc. Top agencies DOI (Department of the Interior)	$18,180	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
37	Technical Equipment Sales Inc. Top agencies Army (Department of the Army)	$17,433	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
38	PHC Corporation of North America Top agencies DOI (Department of the Interior)	$16,552	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
39	Mecx, Inc. Top agencies USAF (Department of the Air Force)	$15,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
40	TNL Sales LLC Top agencies DLA (Defense Logistics Agency)	$13,934	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Labrepco Inc. Top agencies USDA (Department of Agriculture)	$12,188	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Premier & Companies, Inc. Top agencies Commerce (Department of Commerce)	$10,721	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Intermountain Environmental Inc. Top agencies USDA (Department of Agriculture)	$9,894	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
44	Levengood Supply Co., Inc. Top agencies DLA (Defense Logistics Agency)	$9,214	0.1%	Rank history: #38 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
45	Excel Communications LLC Top agencies HHS (Department of Health and Human Services)	$7,200	0.1%	Rank history: #43 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
46	ETI Acquisitions LLC Top agencies USDA (Department of Agriculture)	$6,575	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
47	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$5,182	<0.1%	Rank history: #46 in FY2021, not on the FY2022 list, #58 in FY2024 and not on the FY2025 list; returned.
48	C-Teck, Inc. Top agencies NARA (National Archives and Records Administration)	$5,100	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Ametek Inc. Through Petrolab, L.L.C. Top agencies DLA (Defense Logistics Agency)	$4,331	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #12 in FY2025; new.

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 $13.3 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.

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