Top 100 Contractors in PSC Y1NE: Construction of Water Supply Facilities, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Ames Construction, Inc. Through Ames Federal Contracting Group LLC Top agencies DOI (Department of the Interior)	$129,487,964	30.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
2	Hensel Phelps Construction Co Through Hensel Phelps - Shimizu JV Top agencies Navy (Department of the Navy)	$36,327,000	8.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
3	CDM Smith Inc. 2 awardees, including CDM Constructors Inc. Top agencies DOI (Department of the Interior) Navy (Department of the Navy)	$26,512,455	6.2%	Rank history: #1 in FY2021, #22 in FY2022, #27 in FY2023, not on the FY2024 list and #2 in FY2025; new, not ranked in Aug 2024–Jul 2025.
4	Joseph J Henderson & Son Inc. Top agencies Navy (Department of the Navy)	$25,339,800	6.0%	Rank history: not on the FY2021–FY2024 lists and #5 in FY2025; new, not ranked in Aug 2024–Jul 2025.
5	Pacific Federal Management Inc Top agencies Navy (Department of the Navy)	$19,676,822	4.6%	Rank history: not on the FY2021–FY2024 lists and #6 in FY2025; new, not ranked in Aug 2024–Jul 2025.
6	A&R Pacific-Garney Federal JV II Top agencies DOI (Department of the Interior)	$19,039,200	4.5%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Aug 2024–Jul 2025.
7	Chandler Construction Services, Inc. Top agencies Army (Department of the Army)	$16,664,200	3.9%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #35 in FY2025; down 1 since Aug 2024–Jul 2025.
8	Nakasato Contracting LLC Top agencies Army (Department of the Army)	$16,588,244	3.9%	Rank history: not on the FY2021–FY2024 lists and #9 in FY2025; new, not ranked in Aug 2024–Jul 2025.
9	Prairie Band Construction, Inc. Top agencies Army (Department of the Army)	$10,998,670	2.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
10	Guardian Construction, Inc. Top agencies DOI (Department of the Interior)	$9,449,817	2.2%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and not on the FY2025 list; up 15 since Aug 2024–Jul 2025.
11	R2Build Top agencies Army (Department of the Army)	$9,447,923	2.2%	Rank history: not on the FY2021–FY2024 lists and #15 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	Bowen Engineering Corp Top agencies Navy (Department of the Navy)	$8,450,000	2.0%	Rank history: #4 in FY2021, #2 in FY2022, #5 in FY2023, #7 in FY2024 and #14 in FY2025; down 3 since Aug 2024–Jul 2025.
13	Bethel Downstream JV Top agencies Navy (Department of the Navy)	$8,033,542	1.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
14	S & K Design Build LLC Top agencies USAF (Department of the Air Force)	$7,844,620	1.8%	Rank history: not on the FY2021–FY2024 lists and #18 in FY2025; new, not ranked in Aug 2024–Jul 2025.
15	Jacobs Engineering Group Inc. Through Jacobs Project Management Co. Top agencies DOI (Department of the Interior)	$7,554,611	1.8%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #1 in FY2025; down 14 since Aug 2024–Jul 2025.
16	Dawson Enterprises, Inc. Top agencies Army (Department of the Army)	$6,195,000	1.5%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Ames 1 LLC Top agencies DOI (Department of the Interior)	$5,855,604	1.4%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; new, not ranked in Aug 2024–Jul 2025.
18	C.j. Mahan Construction Company, LLC Top agencies Army (Department of the Army)	$5,362,345	1.3%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #25 in FY2025; up 4 since Aug 2024–Jul 2025.
19	Randy Kinder Excavating Inc. Top agencies Army (Department of the Army)	$5,134,062	1.2%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; down 8 since Aug 2024–Jul 2025.
20	RJS Construction, Inc. 2 awardees Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$5,030,290	1.2%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
21	Cdeem Co Top agencies VA (Department of Veterans Affairs)	$4,776,000	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
22	Tybe-Garney Federal JV LLC Top agencies Navy (Department of the Navy)	$4,345,536	1.0%	Rank history: not on the FY2021 list, #3 in FY2022, #1 in FY2023, #35 in FY2024 and #17 in FY2025; down 5 since Aug 2024–Jul 2025.
23	Snodgrass and Sons Construction Co., Inc. Top agencies USAF (Department of the Air Force)	$3,743,855	0.9%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
24	Jackson Excavation Inc Top agencies USDA (Department of Agriculture)	$3,721,664	0.9%	Rank history: not on the FY2021–FY2024 lists and #24 in FY2025; new, not ranked in Aug 2024–Jul 2025.
25	Bering Straits Native Corporation 3 awardees, including Bering Straits Global Innovations, LLC and Paragon Professional Services LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$3,634,446	0.9%	Rank history: not on the FY2021 list, #7 in FY2022, #70 in FY2023, not on the FY2024 list and #4 in FY2025; down 4 since Aug 2024–Jul 2025.
26	Aaecon General Contracting LLC Top agencies USDA (Department of Agriculture)	$2,533,397	0.6%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; new, not ranked in Aug 2024–Jul 2025.
27	Kamikita Kensetsu Co.,Ltd. Top agencies USAF (Department of the Air Force)	$2,318,635	0.5%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
28	Lacreek Development Corp Top agencies HHS (Department of Health and Human Services)	$1,897,500	0.4%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Aug 2024–Jul 2025.
29	Quality Driven Service LLC Top agencies USDA (Department of Agriculture)	$1,337,546	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
30	Ameritech Contracting LLC Top agencies VA (Department of Veterans Affairs)	$863,048	0.2%	Rank history: not on the FY2021–FY2024 lists and #50 in FY2025; new, not ranked in Aug 2024–Jul 2025.
31	Loman Drilling Inc. Top agencies HHS (Department of Health and Human Services)	$854,085	0.2%	Rank history: #50 in FY2021, #50 in FY2022, #36 in FY2023, #43 in FY2024 and #43 in FY2025; up 24 since Aug 2024–Jul 2025.
32	358 Investments, LLC Top agencies USDA (Department of Agriculture)	$789,358	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
33	Archer Western Construction LLC Top agencies DOI (Department of the Interior)	$750,468	0.2%	Rank history: not on the FY2021–FY2023 lists, #50 in FY2024 and #88 in FY2025; up 58 since Aug 2024–Jul 2025.
34	Glen / Mar Construction, Inc. Top agencies USDA (Department of Agriculture)	$732,604	0.2%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #33 in FY2025; down 6 since Aug 2024–Jul 2025.
35	Sociedad Espanola De Montajes Industriales SA Top agencies USAF (Department of the Air Force)	$694,042	0.2%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
36	Coventina-Gse JV, LLC Top agencies VA (Department of Veterans Affairs)	$691,582	0.2%	Rank history: not on the FY2021 list, #10 in FY2022, not on the FY2023–FY2024 lists and #73 in FY2025; up 34 since Aug 2024–Jul 2025.
37	Boom Concrete Inc. Top agencies USDA (Department of Agriculture)	$691,143	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
38	Cornerstone Construction Services, LLC Top agencies DOT (Department of Transportation)	$498,857	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
39	U.s. Tank & Mechanical Services, Inc. Top agencies DOI (Department of the Interior)	$494,910	0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	F.e. Co., Ltd. Top agencies Navy (Department of the Navy)	$449,454	0.1%	Rank history: not on the FY2021–FY2024 lists and #42 in FY2025; new, not ranked in Aug 2024–Jul 2025.
41	Howard W. Pence, Inc. Top agencies Army (Department of the Army)	$417,321	0.1%	Rank history: not on the FY2021–FY2024 lists and #44 in FY2025; new, not ranked in Aug 2024–Jul 2025.
42	Speegle Construction, Inc. Top agencies Army (Department of the Army)	$401,196	0.1%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #46 in FY2025; down 27 since Aug 2024–Jul 2025.
43	US Diversified Contracting Services Inc. Top agencies VA (Department of Veterans Affairs)	$393,151	0.1%	Rank history: not on the FY2021–FY2023 lists, #41 in FY2024 and #38 in FY2025; down 3 since Aug 2024–Jul 2025.
44	S.j. Louis Construction, Inc. Top agencies DOI (Department of the Interior)	$373,850	0.1%	Rank history: not on the FY2021 list, #1 in FY2022, #24 in FY2023, #18 in FY2024 and #49 in FY2025; new, not ranked in Aug 2024–Jul 2025.
45	Welfl Construction Corp Top agencies DOI (Department of the Interior)	$362,100	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
46	JKA Enterprises, Inc. Top agencies HHS (Department of Health and Human Services)	$334,280	0.1%	Rank history: not on the FY2021–FY2024 lists and #51 in FY2025; new, not ranked in Aug 2024–Jul 2025.
47	Clearwater Drilling Top agencies HHS (Department of Health and Human Services)	$327,870	0.1%	Rank history: not on the FY2021 list, #43 in FY2022, #42 in FY2023, #74 in FY2024 and #52 in FY2025; up 42 since Aug 2024–Jul 2025.
48	Lost Creek Properties Inc. Top agencies HHS (Department of Health and Human Services)	$307,720	0.1%	Rank history: #70 in FY2021, #27 in FY2022, #20 in FY2023, #54 in FY2024 and #32 in FY2025; down 9 since Aug 2024–Jul 2025.
49	Weeminuche Construction Authority Through WCA Construction, LLC Top agencies DOI (Department of the Interior)	$304,848	0.1%	Rank history: not on the FY2021–FY2023 lists, #20 in FY2024 and #13 in FY2025; down 37 since Aug 2024–Jul 2025.
50	Mcdevitt & Sons Plumbing & Heating, Inc. Top agencies Navy (Department of the Navy)	$299,279	0.1%	Rank history: not on the FY2021–FY2024 lists and #53 in FY2025; up 4 since Aug 2024–Jul 2025.
51	Pate Construction Co., Inc. Top agencies DOI (Department of the Interior)	$297,403	0.1%	Rank history: not on the FY2021–FY2022 lists, #3 in FY2023, not on the FY2024 list and #23 in FY2025; down 33 since Aug 2024–Jul 2025.
52	Piedmont Environmental Sciences Inc. Top agencies USDA (Department of Agriculture)	$209,719	<0.1%	Rank history: not on the FY2021 list, #66 in FY2022, not on the FY2023–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
53	Ana General Contractors LLC Top agencies Navy (Department of the Navy)	$205,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
54	Hamilton Pacific Chamberlain LLC Top agencies VA (Department of Veterans Affairs)	$191,973	<0.1%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023, not on the FY2024 list and #69 in FY2025; up 15 since Aug 2024–Jul 2025.
55	Mcmillen, Inc. Top agencies DOI (Department of the Interior)	$191,308	<0.1%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; down 45 since Aug 2024–Jul 2025.
56	Capital Brand Group LLC Top agencies Navy (Department of the Navy)	$184,864	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Record Steel and Construction, Inc. Top agencies DOI (Department of the Interior)	$180,094	<0.1%	Rank history: not on the FY2021 list, #9 in FY2022, #45 in FY2023, #55 in FY2024 and #3 in FY2025; down 53 since Aug 2024–Jul 2025.
58	Southland Holdings LLC Through Oscar Renda Contracting Inc. Top agencies DOI (Department of the Interior)	$150,717	<0.1%	Rank history: not on the FY2021–FY2024 lists and #67 in FY2025; up 7 since Aug 2024–Jul 2025.
59	Environmental Chemical Corporation Top agencies Navy (Department of the Navy)	$149,184	<0.1%	Rank history: not on the FY2021 list, #4 in FY2022, #39 in FY2023, #76 in FY2024 and not on the FY2025 list; up 9 since Aug 2024–Jul 2025.
60	Calista Corp Through Brice Engineering, LLC Top agencies Army (Department of the Army)	$139,648	<0.1%	Rank history: not on the FY2021–FY2024 lists and #60 in FY2025; new, not ranked in Aug 2024–Jul 2025.
61	Phoenix General Contractors, LLC Top agencies DOI (Department of the Interior)	$139,274	<0.1%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; new, not ranked in Aug 2024–Jul 2025.
62	Transtar Pipeline and Orion Construction JV Top agencies Navy (Department of the Navy)	$137,026	<0.1%	Rank history: #19 in FY2021, not on the FY2022 list, #13 in FY2023, #13 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
63	Shellback Construction LLC Top agencies VA (Department of Veterans Affairs)	$132,322	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
64	The Matthews Group Inc. Top agencies Army (Department of the Army)	$125,767	<0.1%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; down 32 since Aug 2024–Jul 2025.
65	Tully Construction Co - Thalle Construction Co LLC Through Thalle Construction Co Inc. Top agencies DOI (Department of the Interior)	$122,378	<0.1%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
66	Carpenter Drilling, LLC Top agencies HHS (Department of Health and Human Services)	$120,240	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
67	Simu Construction Ltd Top agencies DOS (Department of State)	$109,083	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
68	White Bear Construction, Inc. Top agencies DOI (Department of the Interior)	$107,273	<0.1%	Rank history: #9 in FY2021, #49 in FY2022, #17 in FY2023, not on the FY2024 list and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Brandt Construction Co Top agencies Army (Department of the Army)	$98,169	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
70	Central Pump Company, LLC Top agencies DOI (Department of the Interior)	$96,000	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
71	Arsenal Well Drilling Inc. Top agencies USDA (Department of Agriculture)	$89,886	<0.1%	Rank history: not on the FY2021–FY2023 lists, #40 in FY2024 and #71 in FY2025; down 33 since Aug 2024–Jul 2025.
72	Lyday Construction LLC Top agencies HHS (Department of Health and Human Services)	$89,537	<0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023, #58 in FY2024 and #55 in FY2025; down 23 since Aug 2024–Jul 2025.
73	J.s. Mccullough Excavating LLC Top agencies Army (Department of the Army)	$87,585	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	Northland Tree & Stump Removal, LLC Top agencies DOI (Department of the Interior)	$86,377	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
75	Negley's Well Drilling, LLC Top agencies DOI (Department of the Interior)	$67,698	<0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	Elbow Grease Enterprises, LLC Top agencies DOI (Department of the Interior)	$46,687	<0.1%	Rank history: not on the FY2021–FY2023 lists, #33 in FY2024 and #79 in FY2025; down 45 since Aug 2024–Jul 2025.
77	Harris & Stewart Electrical Inc. Top agencies USAF (Department of the Air Force)	$46,634	<0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; new, not ranked in Aug 2024–Jul 2025.
78	Southern Contracting, LLC Top agencies Army (Department of the Army)	$45,166	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
79	Intercontinental Construction Contracting Inc. Top agencies Army (Department of the Army)	$44,793	<0.1%	Rank history: not on the FY2021 list, #11 in FY2022, not on the FY2023 list, #86 in FY2024 and #83 in FY2025; down 1 since Aug 2024–Jul 2025.
80	Govaged Inc. Top agencies DOI (Department of the Interior)	$31,798	<0.1%	Rank history: not on the FY2021–FY2024 lists and #87 in FY2025; new, not ranked in Aug 2024–Jul 2025.
81	Disabled Veterans Construction Inc. Top agencies VA (Department of Veterans Affairs)	$30,512	<0.1%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #77 in FY2025; down 37 since Aug 2024–Jul 2025.
82	KWR Construction Inc. Top agencies Army (Department of the Army)	$29,838	<0.1%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #62 in FY2025; down 18 since Aug 2024–Jul 2025.
83	Grunley Construction Co., Inc. Top agencies Army (Department of the Army)	$25,822	<0.1%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; down 75 since Aug 2024–Jul 2025.
84	Letts & Demery Pump Inc. Top agencies HHS (Department of Health and Human Services)	$22,585	<0.1%	Rank history: #88 in FY2021, #63 in FY2022, #67 in FY2023, #78 in FY2024 and #74 in FY2025; down 17 since Aug 2024–Jul 2025.
85	Gruber Excavating Inc. Top agencies USDA (Department of Agriculture)	$22,528	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
86	Canadian County Water Authority Top agencies HHS (Department of Health and Human Services)	$20,440	<0.1%	Rank history: not on the FY2021–FY2024 lists and #72 in FY2025; down 12 since Aug 2024–Jul 2025.
87	On-Track Construction LLC Top agencies Army (Department of the Army)	$20,203	<0.1%	Rank history: not on the FY2021 list, #14 in FY2022, #14 in FY2023, #39 in FY2024 and #58 in FY2025; down 34 since Aug 2024–Jul 2025.
88	Miners Supply Co. LLC Top agencies DOI (Department of the Interior)	$18,200	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
89	Aaron M Salazar Top agencies DHS (Department of Homeland Security)	$16,975	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Consolidated Fuel and Iron LLC Top agencies DOI (Department of the Interior)	$16,000	<0.1%	Rank history: not on the FY2021–FY2024 lists and #95 in FY2025; new, not ranked in Aug 2024–Jul 2025.
91	Capitol United Solutions Inc. Top agencies Navy (Department of the Navy)	$15,889	<0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Aug 2024–Jul 2025.
92	Ryann and Rose Group, LLC Top agencies DHS (Department of Homeland Security)	$15,507	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Aug 2024–Jul 2025.
93	Pearson Drilling & Engineering Inc. Top agencies USDA (Department of Agriculture)	$14,851	<0.1%	Rank history: #89 in FY2021, not on the FY2022–FY2024 lists and #98 in FY2025; new, not ranked in Aug 2024–Jul 2025.
94	Felder Water Well & Pump Service, LLC Top agencies DOI (Department of the Interior)	$14,190	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
95	Pural Water Specialty Co. , Inc. Top agencies DHS (Department of Homeland Security)	$13,897	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
96	Contemporary Engineering and Construction Top agencies DOS (Department of State)	$11,242	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
97	Ohlsen Right of Way & Maintenance, Inc. Top agencies HHS (Department of Health and Human Services)	$11,240	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Citibank, N.A. Top agencies DHS (Department of Homeland Security)	$10,940	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
99	Weston Solutions Holdings Inc Through Weston Solutions Inc. Top agencies Army (Department of the Army)	$8,412	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Susan E Davis Top agencies HHS (Department of Health and Human Services)	$6,713	<0.1%	Rank history: #87 in FY2021, not on the FY2022 list, #95 in FY2023, not on the FY2024 list and #100 in FY2025; down 3 since Aug 2024–Jul 2025.

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 $425 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.
• Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
• Rank changes compare with Aug 2024–Jul 2025. "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.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers