Top 100 Contractors in PSC 52: Measuring Tools, Aug 2025–Jul 2026

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Kaufman Company, Inc. Top agencies GSA (General Services Administration)	$10,853,327	40.1%	Rank history: #3 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	Winston-Salem Industries for the Blind Inc. Top agencies GSA (General Services Administration)	$1,938,823	7.2%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2023, #4 in FY2024 and #2 in FY2025; up 1 since Aug 2024–Jul 2025.
3	Atlantic Diving Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$1,519,911	5.6%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #20 in FY2025; up 9 since Aug 2024–Jul 2025.
4	Heckler & Koch Defense Inc. Top agencies Army (Department of the Army)	$873,772	3.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
5	Hexagon Manufacturing Intelligence Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$822,594	3.0%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 47 since Aug 2024–Jul 2025.
6	Willrich Precision Instrument Company, Inc. Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$506,882	1.9%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023, #3 in FY2024 and #4 in FY2025; up 1 since Aug 2024–Jul 2025.
7	Carl Zeiss Industrial Quality Solutions LLC Top agencies Army (Department of the Army)	$468,601	1.7%	Rank history: not on the FY2021–FY2023 lists, #13 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
8	Kulite Semiconductor Products Inc. Top agencies Army (Department of the Army)	$449,756	1.7%	Rank history: #85 in FY2021, #71 in FY2022, #24 in FY2023, #26 in FY2024 and #12 in FY2025; up 10 since Aug 2024–Jul 2025.
9	Saab Dynamics Aktiebolag Top agencies DLA (Defense Logistics Agency)	$418,550	1.5%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; new, not ranked in Aug 2024–Jul 2025.
10	Zistos Corporation Top agencies DLA (Defense Logistics Agency)	$378,459	1.4%	Rank history: #4 in FY2021, #4 in FY2022, #7 in FY2023, #6 in FY2024 and #3 in FY2025; down 6 since Aug 2024–Jul 2025.
11	Defense Maritime Solutions, Inc. Top agencies Navy (Department of the Navy)	$342,949	1.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
12	Snap-On Incorporated Through Idsc Holdings LLC Top agencies USAF (Department of the Air Force)	$330,980	1.2%	Rank history: not on the FY2021–FY2024 lists and #7 in FY2025; new, not ranked in Aug 2024–Jul 2025.
13	G M J Machine Co, Inc. Top agencies DLA (Defense Logistics Agency)	$308,849	1.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
14	Imperial Construction NW LLC Top agencies USAF (Department of the Air Force)	$264,039	1.0%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
15	Marine Systems, Inc. Top agencies GSA (General Services Administration)	$250,396	0.9%	Rank history: not on the FY2021–FY2025 lists; up 158 since Aug 2024–Jul 2025.
16	Ewing Electronics, Inc. Top agencies USAF (Department of the Air Force)	$244,266	0.9%	Rank history: not on the FY2021–FY2023 lists, #2 in FY2024 and #10 in FY2025; down 14 since Aug 2024–Jul 2025.
17	F & J Specialty Products, Inc. Top agencies EPA (Environmental Protection Agency)	$241,721	0.9%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; up 15 since Aug 2024–Jul 2025.
18	RTX Corporation 3 awardees, including Pratt & Whitney Measurement Systems, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$227,557	0.8%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023, #5 in FY2024 and #9 in FY2025; up 4 since Aug 2024–Jul 2025.
19	Mahr Inc. Top agencies DLA (Defense Logistics Agency)	$215,782	0.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
20	Lockheed Martin Corporation 2 awardees, including Derco Aerospace, Inc. and Sikorsky Aircraft Corporation Top agencies DLA (Defense Logistics Agency)	$202,233	0.7%	Rank history: #76 in FY2021, #20 in FY2022, #34 in FY2023, #86 in FY2024 and #36 in FY2025; up 13 since Aug 2024–Jul 2025.
21	Torch Technologies Inc. Top agencies Army (Department of the Army)	$184,765	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
22	Cad / Cam Services, Inc. Top agencies Navy (Department of the Navy)	$182,404	0.7%	Rank history: not on the FY2021–FY2023 lists, #53 in FY2024 and #15 in FY2025; new, not ranked in Aug 2024–Jul 2025.
23	Ciqima Federal Services LLC Top agencies USAF (Department of the Air Force)	$182,122	0.7%	Rank history: not on the FY2021–FY2022 lists, #5 in FY2023, #47 in FY2024 and #8 in FY2025; up 2 since Aug 2024–Jul 2025.
24	Boneal, Incorporated Top agencies USAF (Department of the Air Force)	$172,559	0.6%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2023, not on the FY2024 list and #19 in FY2025; up 19 since Aug 2024–Jul 2025.
25	Concurrent Technologies Corp Through CTC Enterprise Ventures Corp Top agencies DLA (Defense Logistics Agency)	$168,040	0.6%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
26	White Hand Global LLC Top agencies Navy (Department of the Navy)	$147,500	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
27	Vprime TECH Inc. Top agencies Navy (Department of the Navy)	$146,885	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
28	K & K Hardware & Lumber LLC Top agencies Army (Department of the Army)	$141,395	0.5%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2023, not on the FY2024 list and #98 in FY2025; up 73 since Aug 2024–Jul 2025.
29	Ametek Inc. Through Faro Technologies Inc. Top agencies Navy (Department of the Navy)	$137,936	0.5%	Rank history: not on the FY2021 list, #91 in FY2022, not on the FY2023–FY2024 lists and #14 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Emerson Electric Co Through Micro Motion, Inc. Top agencies USDA (Department of Agriculture)	$135,217	0.5%	Rank history: not on the FY2021 list, #12 in FY2022, #25 in FY2023, not on the FY2024 list and #24 in FY2025; new, not ranked in Aug 2024–Jul 2025.
31	Oshkosh Corporation Through Oshkosh Defense LLC Top agencies DLA (Defense Logistics Agency)	$134,155	0.5%	Rank history: #55 in FY2021, #79 in FY2022, #45 in FY2023, #54 in FY2024 and #37 in FY2025; up 9 since Aug 2024–Jul 2025.
32	Gaging.com, LLC Top agencies Navy (Department of the Navy)	$118,309	0.4%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023, not on the FY2024 list and #69 in FY2025; up 41 since Aug 2024–Jul 2025.
33	Leonardo S.p.A. Through DRS Network & Imaging Systems LLC Top agencies NASA (National Aeronautics and Space Administration)	$116,840	0.4%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023, #9 in FY2024 and #5 in FY2025; down 24 since Aug 2024–Jul 2025.
34	B & P Consort, Inc. Top agencies Navy (Department of the Navy)	$110,063	0.4%	Rank history: not on the FY2021–FY2024 lists and #27 in FY2025; new, not ranked in Aug 2024–Jul 2025.
35	Enerpac Tool Group Corp Through Hydratight Operations Inc. Top agencies DHS (Department of Homeland Security)	$91,308	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
36	Grimco Pneumatic Corp Top agencies DLA (Defense Logistics Agency)	$88,710	0.3%	Rank history: #90 in FY2021, not on the FY2022–FY2023 lists, #52 in FY2024 and #92 in FY2025; up 9 since Aug 2024–Jul 2025.
37	Advanced Torque Products, LLC Top agencies Army (Department of the Army)	$87,360	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
38	Halliday Technologies Inc. Top agencies USAF (Department of the Air Force)	$83,724	0.3%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
39	Trimble Inc. Top agencies USAF (Department of the Air Force)	$83,696	0.3%	Rank history: #86 in FY2021, not on the FY2022–FY2024 lists and #33 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	Nadco Tapes & Labels, LLC Top agencies DOJ (Department of Justice)	$76,895	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
41	V2X, Inc. Through V2X Systems LLC Top agencies DLA (Defense Logistics Agency)	$73,529	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
42	The Office Group Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$72,187	0.3%	Rank history: not on the FY2021–FY2024 lists and #41 in FY2025; up 168 since Aug 2024–Jul 2025.
43	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$71,597	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
44	MPI Fastech, LLC Top agencies Navy (Department of the Navy)	$65,675	0.2%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; new, not ranked in Aug 2024–Jul 2025.
45	Jag Components, LLC Top agencies DLA (Defense Logistics Agency)	$61,460	0.2%	Rank history: not on the FY2021–FY2023 lists, #23 in FY2024 and #90 in FY2025; up 50 since Aug 2024–Jul 2025.
46	Stravon Systems LLC Top agencies Navy (Department of the Navy)	$57,491	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
47	Buy It Solutions Inc. Top agencies Navy (Department of the Navy)	$55,356	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
48	Precision Gage Company Top agencies DLA (Defense Logistics Agency)	$53,631	0.2%	Rank history: not on the FY2021–FY2025 lists; up 71 since Aug 2024–Jul 2025.
49	Eastpoint Lasers LLC Top agencies Navy (Department of the Navy)	$52,920	0.2%	Rank history: not on the FY2021–FY2024 lists and #21 in FY2025; down 26 since Aug 2024–Jul 2025.
50	Triman Industries Inc. Top agencies DLA (Defense Logistics Agency)	$52,367	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023, not on the FY2024 list and #47 in FY2025; up 19 since Aug 2024–Jul 2025.
51	CSP Investments, LLC Top agencies Navy (Department of the Navy)	$49,620	0.2%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Aug 2024–Jul 2025.
52	Independent Rough Terrain Center LLC Top agencies DLA (Defense Logistics Agency)	$47,762	0.2%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; up 50 since Aug 2024–Jul 2025.
53	Heico Corp Through Pioneer Industries, LLC Top agencies DLA (Defense Logistics Agency)	$47,465	0.2%	Rank history: not on the FY2021–FY2023 lists, #87 in FY2024 and #60 in FY2025; up 36 since Aug 2024–Jul 2025.
54	Johnson Gage Company The Top agencies Navy (Department of the Navy)	$46,880	0.2%	Rank history: #9 in FY2021, #76 in FY2022, not on the FY2023 list, #69 in FY2024 and #83 in FY2025; up 28 since Aug 2024–Jul 2025.
55	Jenks Inc. Top agencies DHS (Department of Homeland Security)	$46,633	0.2%	Rank history: not on the FY2021–FY2024 lists and #25 in FY2025; down 14 since Aug 2024–Jul 2025.
56	APM Manufacturing Top agencies Navy (Department of the Navy)	$45,950	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
57	Radiation Solutions Inc. Top agencies Commerce (Department of Commerce)	$45,745	0.2%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #58 in FY2025; down 19 since Aug 2024–Jul 2025.
58	Raloid Tool Co., Inc. Top agencies Army (Department of the Army)	$42,967	0.2%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2023 and not on the FY2024–FY2025 lists; up 106 since Aug 2024–Jul 2025.
59	All Axis Precision LLC Top agencies Navy (Department of the Navy)	$41,941	0.2%	Rank history: not on the FY2021–FY2023 lists, #43 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
60	Ateq & Cobra Aviation, Inc. Top agencies Navy (Department of the Navy)	$41,800	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
61	Advanced Air Tool Co., Inc. Top agencies Navy (Department of the Navy)	$41,780	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
62	K5 Defense LLC Top agencies Navy (Department of the Navy)	$39,992	0.1%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023, #34 in FY2024 and not on the FY2025 list; down 27 since Aug 2024–Jul 2025.
63	Daniels Manufacturing Corporation Top agencies USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$39,409	0.1%	Rank history: not on the FY2021–FY2025 lists; up 43 since Aug 2024–Jul 2025.
64	Shadin LP Top agencies Army (Department of the Army)	$38,250	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
65	A.k.o. Inc. Top agencies Army (Department of the Army)	$38,115	0.1%	Rank history: #97 in FY2021, not on the FY2022–FY2024 lists and #66 in FY2025; new, not ranked in Aug 2024–Jul 2025.
66	M.n. Gumbert Corp Top agencies Army (Department of the Army)	$36,450	0.1%	Rank history: not on the FY2021–FY2024 lists and #68 in FY2025; up 6 since Aug 2024–Jul 2025.
67	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$36,395	0.1%	Rank history: not on the FY2021 list, #51 in FY2022, #30 in FY2023, #35 in FY2024 and #23 in FY2025; down 50 since Aug 2024–Jul 2025.
68	Pinpoint Laser Systems, Inc. Top agencies Navy (Department of the Navy)	$35,020	0.1%	Rank history: not on the FY2021–FY2024 lists and #71 in FY2025; new, not ranked in Aug 2024–Jul 2025.
69	Waukesha Bearings Corporation Top agencies DLA (Defense Logistics Agency)	$33,696	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
70	Metrologyworks Inc. Top agencies Navy (Department of the Navy)	$30,791	0.1%	Rank history: #31 in FY2021, not on the FY2022 list, #27 in FY2023, #94 in FY2024 and #40 in FY2025; down 3 since Aug 2024–Jul 2025.
71	United Drill Bushing Corporation Top agencies DLA (Defense Logistics Agency)	$29,450	0.1%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; down 37 since Aug 2024–Jul 2025.
72	S & K Federal Services LLC Top agencies USAF (Department of the Air Force)	$29,313	0.1%	Rank history: not on the FY2021–FY2025 lists; up 127 since Aug 2024–Jul 2025.
73	Thomas Keating Limited Top agencies Smithsonian (Smithsonian Institution)	$29,200	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
74	Atap Inc. Top agencies USAF (Department of the Air Force)	$28,719	0.1%	Rank history: #47 in FY2021, not on the FY2022 list, #46 in FY2023, #75 in FY2024 and #52 in FY2025; down 21 since Aug 2024–Jul 2025.
75	Govcrest Inc. Top agencies DHS (Department of Homeland Security)	$27,893	0.1%	Rank history: not on the FY2021–FY2024 lists and #82 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	Jgils, LLC Top agencies DLA (Defense Logistics Agency)	$26,902	0.1%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2023, #55 in FY2024 and #44 in FY2025; down 37 since Aug 2024–Jul 2025.
77	J & L Metrology, Inc. Top agencies DLA (Defense Logistics Agency)	$25,704	0.1%	Rank history: #22 in FY2021, #42 in FY2022, not on the FY2023 list, #57 in FY2024 and #86 in FY2025; new, not ranked in Aug 2024–Jul 2025.
78	Nationwide Supplies, L.P. Top agencies USAF (Department of the Air Force)	$25,064	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
79	Wabtec Inspection Technologies, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$24,454	0.1%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
80	Norman - William Company, Inc. Top agencies Navy (Department of the Navy)	$24,002	0.1%	Rank history: not on the FY2021–FY2025 lists; up 37 since Aug 2024–Jul 2025.
81	Giga, Inc. Top agencies Army (Department of the Army)	$23,776	0.1%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023, #99 in FY2024 and not on the FY2025 list; up 80 since Aug 2024–Jul 2025.
82	Larkos Packing and Distribution Inc. Top agencies DLA (Defense Logistics Agency)	$23,518	0.1%	Rank history: not on the FY2021–FY2024 lists and #80 in FY2025; up 8 since Aug 2024–Jul 2025.
83	F P A Manufacturing Top agencies DLA (Defense Logistics Agency)	$22,501	0.1%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 20 since Aug 2024–Jul 2025.
84	ACG Systems, Inc. Top agencies DHS (Department of Homeland Security)	$22,400	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; new, not ranked in Aug 2024–Jul 2025.
85	Midway Industrial Supply Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$22,005	0.1%	Rank history: not on the FY2021–FY2025 lists; up 64 since Aug 2024–Jul 2025.
86	Brunson Instrument Company Top agencies Navy (Department of the Navy)	$20,351	0.1%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023, not on the FY2024 list and #94 in FY2025; new, not ranked in Aug 2024–Jul 2025.
87	3D Engineering Solutions, LLC Top agencies Commerce (Department of Commerce)	$19,320	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Aug 2024–Jul 2025.
88	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency)	$17,512	0.1%	Rank history: #84 in FY2021, #64 in FY2022, #78 in FY2023, #81 in FY2024 and #29 in FY2025; down 60 since Aug 2024–Jul 2025.
89	Z and K Services Inc. Top agencies DLA (Defense Logistics Agency)	$17,254	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
90	Hutchinson Industries Inc Through Saft America Inc. Top agencies DHS (Department of Homeland Security)	$16,808	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
91	Fortive Corporation Through Fluke Electronics Corp Top agencies Commerce (Department of Commerce)	$16,749	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
92	OLB Associates LLC Top agencies DLA (Defense Logistics Agency)	$16,470	0.1%	Rank history: not on the FY2021–FY2025 lists; up 96 since Aug 2024–Jul 2025.
93	S I T Corporation Top agencies DLA (Defense Logistics Agency)	$16,407	0.1%	Rank history: not on the FY2021 list, #48 in FY2022, not on the FY2023 list, #41 in FY2024 and #59 in FY2025; down 34 since Aug 2024–Jul 2025.
94	Reliant Source Partners LLC Top agencies DOS (Department of State)	$16,388	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
95	A & M Industrial Inc. Top agencies Army (Department of the Army)	$16,065	0.1%	Rank history: not on the FY2021–FY2023 lists, #95 in FY2024 and #75 in FY2025; down 9 since Aug 2024–Jul 2025.
96	Form Fit & Function LLC Top agencies DLA (Defense Logistics Agency)	$15,975	0.1%	Rank history: #91 in FY2021, not on the FY2022–FY2024 lists and #78 in FY2025; down 17 since Aug 2024–Jul 2025.
97	Ideal Supply Inc. Top agencies Navy (Department of the Navy)	$14,980	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
98	Hoosier Industrial Supply, Inc. Top agencies DLA (Defense Logistics Agency)	$14,690	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 72 since Aug 2024–Jul 2025.
99	Bright Lights Usa, Inc. Top agencies DLA (Defense Logistics Agency)	$14,512	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
100	Dezzeloper LLC Top agencies Navy (Department of the Navy)	$14,309	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.

Rankings for the codes under PSC 52

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 $27.1 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