Top 100 Contractors in PSC 4120: Air Conditioning Equipment, FY2023

Name: Top 100 Contractors in PSC 4120: Air Conditioning Equipment, FY2023
Creator: GovTribe

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

The top 10 won 54% of FY2023 PSC 4120 contract dollars

Contract obligations: $101,556,225 Net of deobligations, by contracts coded PSC 4120
Contractors: 345 Parent companies with an obligation
Largest contractor: W S Darley & Co $10 million, 9.7% 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	W S Darley & Co Top agencies USAF (Department of the Air Force)	$10,040,023	9.7%	Rank history: not on the FY2021 list, #2 in FY2022, #78 in FY2024 and not on the FY2025 list; up 1 since FY2022.
2	Science and Engineering Services LLC Top agencies USAF (Department of the Air Force)	$9,905,424	9.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
3	Kuog Corp Top agencies USAF (Department of the Air Force)	$8,234,541	8.0%	Rank history: not on the FY2021 list, #3 in FY2022, #2 in FY2024 and #3 in FY2025; unchanged since FY2022.
4	Tyonek Native Corporatio Through Tfab Defense Systems LLC Top agencies Army (Department of the Army)	$5,063,194	4.9%	Rank history: #1 in FY2021, #9 in FY2022, #26 in FY2024 and not on the FY2025 list; up 5 since FY2022.
5	RTX Corporation 3 awardees, including Noresco, LLC, Hamilton Sundstrand Corporation and Carrier Corporation Top agencies DOJ (Department of Justice) DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,847,596	4.7%	Rank history: #48 in FY2021, #15 in FY2022, #12 in FY2024 and #48 in FY2025; up 10 since FY2022.
6	Trane U.S. Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$4,067,601	3.9%	Rank history: #7 in FY2021, #5 in FY2022, #7 in FY2024 and #12 in FY2025; down 1 since FY2022.
7	Capex Construction LLC Top agencies VA (Department of Veterans Affairs)	$3,557,100	3.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	Hunter Defense Technolog 2 awardees, including HDT Expeditionary Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$3,431,164	3.3%	Rank history: #4 in FY2021, #1 in FY2022, #8 in FY2024 and not on the FY2025 list; down 7 since FY2022.
9	Valor Construction Management, LLC Top agencies VA (Department of Veterans Affairs)	$3,161,344	3.1%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and not on the FY2025 list; new.
10	Snowbird Environmental Systems Corporation Through Snowbird Technologies Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$3,086,468	3.0%	Rank history: #5 in FY2021, #13 in FY2022, #42 in FY2024 and not on the FY2025 list; up 3 since FY2022.
11	Wright & Wright Machinery Co., Inc. Top agencies Navy (Department of the Navy)	$2,315,353	2.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
12	KZN Insaat Taahhut Ticaret Ithalat Ihracat Sanayi Limited Sirketi Top agencies USAF (Department of the Air Force)	$1,628,820	1.6%	Rank history: not on the FY2021 list, #8 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
13	Arabi Company WLL Top agencies Army (Department of the Army)	$1,531,216	1.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 159 since FY2022.
14	Snodgrass Contracting LLC Top agencies HHS (Department of Health and Human Services)	$1,438,315	1.4%	Rank history: not on the FY2021 list, #11 in FY2022, #14 in FY2024 and #11 in FY2025; down 3 since FY2022.
15	Portable Air Group LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,350,561	1.3%	Rank history: #34 in FY2021, #21 in FY2022, #21 in FY2024 and #40 in FY2025; up 6 since FY2022.
16	Accentz, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,317,526	1.3%	Rank history: #37 in FY2021, #20 in FY2022, #19 in FY2024 and #7 in FY2025; up 4 since FY2022.
17	Cobham Mission Systems Orchard Park Inc. Through Mission Systems Orchard Park Inc. Top agencies Army (Department of the Army)	$1,070,925	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
18	Great Plains Communications LLC Through Strantech LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$944,037	0.9%	Rank history: not on the FY2021 list, #93 in FY2022 and not on the FY2024–FY2025 lists; up 75 since FY2022.
19	3M Electric LLC Top agencies VA (Department of Veterans Affairs)	$847,255	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
20	Sanford Federal, Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DOJ (Department of Justice)	$796,443	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	Phoenix Systems Engineering Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) USAF (Department of the Air Force)	$776,727	0.8%	Rank history: #52 in FY2021, #48 in FY2022, #29 in FY2024 and not on the FY2025 list; up 27 since FY2022.
22	Atap Inc. Top agencies USAF (Department of the Air Force)	$770,623	0.7%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and not on the FY2025 list; new.
23	Johnson Controls Industries 5 awardees, including Johnson Controls, Inc. and Johnson Controls Building Automation Systems, LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) USAF (Department of the Air Force)	$763,022	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Aggreko, LLC 2 awardees Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$762,499	0.7%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and not on the FY2025 list; new.
25	Whayne Supply Company Through Boyd Company Top agencies Army (Department of the Army)	$755,818	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
26	Achuti LLC Top agencies USAF (Department of the Air Force)	$728,598	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	RFS LLC Top agencies USAF (Department of the Air Force)	$724,972	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	Randy Henry Holdings, Inc. Top agencies Navy (Department of the Navy)	$650,821	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
29	Program Management and Technology Services, Inc. Top agencies Army (Department of the Army)	$648,721	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
30	Astrea Group for Trading and Contracting Top agencies USAF (Department of the Air Force)	$583,008	0.6%	Rank history: #29 in FY2021, not on the FY2022 list, #66 in FY2024 and #30 in FY2025; returned.
31	JD Martin Construction Services Inc. Top agencies USAF (Department of the Air Force)	$548,998	0.5%	Rank history: #80 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
32	Daikin Applied Americas Inc 2 awardees, including Daikin Applied Germany GMBH Top agencies DOS (Department of State) USAF (Department of the Air Force)	$545,030	0.5%	Rank history: #66 in FY2021, #27 in FY2022, #24 in FY2024 and #25 in FY2025; down 5 since FY2022.
33	Statz Corp Top agencies DLA (Defense Logistics Agency)	$521,453	0.5%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and #78 in FY2025; new.
34	Honeywell International Inc. Top agencies DLA (Defense Logistics Agency)	$479,949	0.5%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2024 and not on the FY2025 list; new.
35	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$476,033	0.5%	Rank history: #18 in FY2021, #54 in FY2022, #20 in FY2024 and #19 in FY2025; up 19 since FY2022.
36	Reon Inc. Top agencies HHS (Department of Health and Human Services)	$448,109	0.4%	Rank history: not on the FY2021–FY2022 lists, #38 in FY2024 and #36 in FY2025; new.
37	Government of the United States 2 awardees, including Federal Prison Industries, Inc. and Army & Air Force Exchange Service Top agencies Navy (Department of the Navy) Army (Department of the Army) DOI (Department of the Interior)	$443,708	0.4%	Rank history: #81 in FY2021, #81 in FY2022, #31 in FY2024 and #65 in FY2025; up 44 since FY2022.
38	Olgoonik Federal LLC Through Olgoonik General, LLC Top agencies HHS (Department of Health and Human Services)	$441,348	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
39	AKS Industries Inc. Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$406,845	0.4%	Rank history: #14 in FY2021, #30 in FY2022, #25 in FY2024 and not on the FY2025 list; down 9 since FY2022.
40	Acumen Enterprises Inc. Top agencies USAF (Department of the Air Force)	$406,791	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Mckenney'S Management Corporation Through Mckenney's, Inc. Top agencies VA (Department of Veterans Affairs)	$397,252	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Caldaia Controls LLC Top agencies VA (Department of Veterans Affairs)	$390,960	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	Space Al Arabi General Trading Co. WLL Top agencies USAF (Department of the Air Force)	$378,899	0.4%	Rank history: #36 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
44	Caprice Electronics, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$377,739	0.4%	Rank history: not on the FY2021 list, #29 in FY2022, #64 in FY2024 and not on the FY2025 list; down 15 since FY2022.
45	Windward Enterprises, LLC Top agencies DLA (Defense Logistics Agency)	$368,895	0.4%	Rank history: #9 in FY2021, not on the FY2022 list, #33 in FY2024 and #15 in FY2025; up 56 since FY2022.
46	William A. Harrison, Inc. Top agencies Army (Department of the Army)	$331,524	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #21 in FY2025; new.
47	Talon Veteran Services Incorporated Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture) DHS (Department of Homeland Security)	$327,531	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
48	Lotususa, Inc. Top agencies USAF (Department of the Air Force)	$311,413	0.3%	Rank history: #26 in FY2021, #33 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
49	Mergent Global Services Limited Liability Company Top agencies USAF (Department of the Air Force)	$298,500	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	Paramount Mechanical Corp. Top agencies HHS (Department of Health and Human Services)	$297,321	0.3%	Rank history: not on the FY2021 list, #82 in FY2022 and not on the FY2024–FY2025 lists; up 32 since FY2022.
51	Aantilia LLC Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$297,085	0.3%	Rank history: #87 in FY2021, #66 in FY2022, not on the FY2024 list and #8 in FY2025; up 15 since FY2022.
52	Aviate Enterprises, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$292,907	0.3%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and #29 in FY2025; up 136 since FY2022.
53	Texas Chiller Systems LLC Top agencies USAF (Department of the Air Force)	$282,275	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	Quality Refrigeration Company, Inc. 2 awardees Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$281,270	0.3%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and not on the FY2025 list; up 106 since FY2022.
55	Electro Impulse Laboratory Inc. Top agencies Navy (Department of the Navy)	$271,910	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	GPC Foreign Contractor Consolidated Reporting Top agencies USAF (Department of the Air Force)	$267,364	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
57	D Carter Consulting LLC Top agencies VA (Department of Veterans Affairs)	$265,267	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 84 since FY2022.
58	Portacool LLC Top agencies DLA (Defense Logistics Agency)	$255,108	0.2%	Rank history: #64 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 15 since FY2022.
59	Sky Creative for Trading and Contracting Company Top agencies USAF (Department of the Air Force)	$251,417	0.2%	Rank history: #11 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
60	World Micro Components, LLC Through MIT Holdings LLC Top agencies Navy (Department of the Navy)	$246,970	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	Pacific International Trading Contracting and Services Top agencies USAF (Department of the Air Force)	$241,865	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
62	Johnson Controls Security Solutions LLC 3 awardees, including Johnson Controls Inc. and Johnson Controls Building Automation Systems, LLC Top agencies DOS (Department of State) Navy (Department of the Navy) DOJ (Department of Justice)	$237,357	0.2%	Rank history: #33 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; down 44 since FY2022.
63	Pueblo Mechanical and Controls, LLC Top agencies DOJ (Department of Justice)	$227,622	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 67 since FY2022.
64	J. T. Systems Inc. Through J.t. Systems, Inc. Top agencies Navy (Department of the Navy)	$217,400	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Advanced Cooling Technologies Inc. Top agencies Navy (Department of the Navy)	$213,400	0.2%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2024 and #13 in FY2025; new.
66	Resolute Industrial LLC Top agencies Navy (Department of the Navy)	$204,066	0.2%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2024 and not on the FY2025 list; new.
67	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$189,759	0.2%	Rank history: #31 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 36 since FY2022.
68	Capp LLC Top agencies DOI (Department of the Interior) DOS (Department of State) USAF (Department of the Air Force)	$189,151	0.2%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2024 and #53 in FY2025; up 103 since FY2022.
69	Fritsch GMBH Top agencies USAF (Department of the Air Force)	$182,934	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2024 list and #60 in FY2025; up 2 since FY2022.
70	ACE Controls & Instrumentation Inc. Top agencies Navy (Department of the Navy)	$178,555	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 134 since FY2022.
71	Divine Imaging Inc. Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce)	$174,315	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
72	Wisecom Technologies Inc. Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$163,525	0.2%	Rank history: not on the FY2021 list, #39 in FY2022 and not on the FY2024–FY2025 lists; down 33 since FY2022.
73	Accuair, LLC Top agencies Commerce (Department of Commerce)	$159,236	0.2%	Rank history: #43 in FY2021, not on the FY2022 list, not on the FY2024 list and #87 in FY2025; up 60 since FY2022.
74	Aircraft Ground Equipment, LLC Top agencies NASA (National Aeronautics and Space Administration)	$149,715	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	Govage, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$149,531	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	Oldach Associates LLC Top agencies DOJ (Department of Justice) DODEA (Department of Defense Education Activity)	$148,389	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 178 since FY2022.
77	Frio Clima Valentin SL Top agencies Navy (Department of the Navy)	$144,185	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
78	Jackson Mechanical Service Inc. Top agencies VA (Department of Veterans Affairs)	$141,426	0.1%	Rank history: not on the FY2021 list, #96 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
79	Geneco Technologies, LLC Top agencies USAF (Department of the Air Force)	$139,315	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Antonio C. Mendoza III Top agencies USAF (Department of the Air Force)	$137,596	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
81	Williamsville Resources II, Inc. Top agencies DOE (Department of Energy)	$133,200	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	Energy Systems Air Conditioning Contractors Inc. Top agencies DOI (Department of the Interior)	$132,450	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
83	Munters Corporation Top agencies USDA (Department of Agriculture)	$129,400	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	ITL LLC Top agencies Navy (Department of the Navy)	$123,727	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	RNK International, Inc. Top agencies USAF (Department of the Air Force) GSA (General Services Administration) DLA (Defense Logistics Agency)	$120,768	0.1%	Rank history: #40 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 36 since FY2022.
86	Multistack LLC Top agencies DOS (Department of State)	$119,539	0.1%	Rank history: #91 in FY2021, #75 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
87	Skdcj, Inc. Top agencies Navy (Department of the Navy)	$117,833	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 79 since FY2022.
88	Lexington Corporate Enterprises, Inc. Through TEC Distribution LLC Top agencies Navy (Department of the Navy)	$116,970	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
89	Diamondone Energy Services LLC Top agencies VA (Department of Veterans Affairs)	$116,565	0.1%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
90	Imeco Inc. Top agencies Navy (Department of the Navy)	$114,530	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 111 since FY2022.
91	Apex Associates 1, LLC Top agencies DOS (Department of State)	$113,971	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Cold Air LLC Top agencies DOJ (Department of Justice)	$112,717	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
93	Bud Griffin & Associates , Inc. Top agencies DOT (Department of Transportation)	$109,150	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Gateway International Inc. Top agencies DOS (Department of State)	$108,888	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 13 since FY2022.
95	Prts Global, LLC Top agencies USAF (Department of the Air Force)	$104,614	0.1%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and not on the FY2025 list; new.
96	IA Manufacturing LLC Top agencies USAF (Department of the Air Force)	$103,888	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	Ashtead US Holdings Inc 2 awardees, including Sunbelt Rentals, Inc. Top agencies USAF (Department of the Air Force)	$103,396	0.1%	Rank history: #32 in FY2021, not on the FY2022 list, #53 in FY2024 and not on the FY2025 list; returned.
98	Match for Projects Management Top agencies USAF (Department of the Air Force)	$102,760	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 81 since FY2022.
99	Mooweep LLC Top agencies DOI (Department of the Interior)	$100,604	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	Baco LLC Top agencies DOS (Department of State)	$100,000	0.1%	Rank history: #97 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.

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100 of 345 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 $103 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 PSC 4120 contractors in FY2023?

1. W S Darley & Co ($10M), 2. Science and Engineering Services LLC ($9.91M), 3. Kuog Corp ($8.23M), 4. Tyonek Native Corporatio ($5.06M), 5. RTX Corporation ($4.85M), 6. Trane U.S. Inc. ($4.07M), 7. Capex Construction LLC ($3.56M), 8. Hunter Defense Technolog ($3.43M), 9. Valor Construction Management, LLC ($3.16M), 10. Snowbird Environmental Systems Corporation ($3.09M).

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