Top 100 Contractors in PSC 1615: Helicopter Rotor Blades, Drive Mechanisms and Components, FY2021

Name: Top 100 Contractors in PSC 1615: Helicopter Rotor Blades, Drive Mechanisms and Components, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 87% of FY2021 PSC 1615 contract dollars

Contract obligations: $383,486,461 Net of deobligations, by contracts coded PSC 1615
Contractors: 126 Parent companies with an obligation
Largest contractor: Lockheed Martin Corporation $191 million, 44.9% 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	Lockheed Martin Corporation 6 awardees, including Sikorsky Aircraft Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$190,986,233	44.9%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	The Boeing Company 8 awardees, including Boeing Distribution, Inc. and Boeing Distribution Services X, Inc. Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command) DLA (Defense Logistics Agency)	$139,555,960	32.8%	Rank history: #3 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; up 1 since FY2020.
3	Sikorsky Aircraft Corporation Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$15,649,750	3.7%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
4	Overhaul Support Services, LLC Top agencies Army (Department of the Army)	$5,366,555	1.3%	Rank history: #9 in FY2022, #3 in FY2023, #16 in FY2024 and not on the FY2025 list; up 2 since FY2020.
5	Textron Inc. Through Bell Textron Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$5,337,568	1.3%	Rank history: #7 in FY2022, #5 in FY2023, #4 in FY2024 and #3 in FY2025; down 1 since FY2020.
6	PCX Aerostructures LLC Top agencies Army (Department of the Army)	$5,224,765	1.2%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; up 31 since FY2020.
7	Airbus Americas Inc. Through Airbus Helicopters, Inc. Top agencies DHS (Department of Homeland Security)	$3,120,740	0.7%	Rank history: #5 in FY2022, #6 in FY2023, #14 in FY2024 and not on the FY2025 list; up 2 since FY2020.
8	General Electric Company 4 awardees, including GE Aviation Systems LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) Army (Department of the Army)	$2,399,115	0.6%	Rank history: #12 in FY2022, not on the FY2023 list, #21 in FY2024 and #19 in FY2025; up 23 since FY2020.
9	RTX Corporation 5 awardees, including Goodrich Corporation, Hamilton Sundstrand Corporation and Rosemount Aerospace Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$2,092,564	0.5%	Rank history: #6 in FY2022, #4 in FY2023, #15 in FY2024 and #10 in FY2025; up 8 since FY2020.
10	Bell Textron Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,901,552	0.4%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
11	Ametek Inc. Through Ametek Thermal Systems Inc. Top agencies Navy (Department of the Navy)	$1,834,310	0.4%	Rank history: #95 in FY2022, #88 in FY2023, not on the FY2024 list and #81 in FY2025; down 1 since FY2020.
12	Kaman Corp Through Kaman Aerospace Corporation Top agencies Navy (Department of the Navy)	$1,213,105	0.3%	Rank history: #25 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
13	Triman Industries Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$1,139,612	0.3%	Rank history: #11 in FY2022, #11 in FY2023, #9 in FY2024 and #6 in FY2025; up 8 since FY2020.
14	Jamaica Bearings Co., Inc. 2 awardees Top agencies DLA (Defense Logistics Agency)	$967,463	0.2%	Rank history: #14 in FY2022, #17 in FY2023, #25 in FY2024 and #11 in FY2025; up 12 since FY2020.
15	Northrop Grumman Corporation 5 awardees, including Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$823,909	0.2%	Rank history: #16 in FY2022, not on the FY2023 list, #59 in FY2024 and not on the FY2025 list; up 4 since FY2020.
16	Moog Inc. Top agencies DLA (Defense Logistics Agency)	$799,168	0.2%	Rank history: not on the FY2022 list, #40 in FY2023, #94 in FY2024 and not on the FY2025 list; up 90 since FY2020.
17	Eaton Corporation 2 awardees, including Eaton Aerospace LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$774,271	0.2%	Rank history: #10 in FY2022, #15 in FY2023, not on the FY2024 list and #9 in FY2025; down 1 since FY2020.
18	Master Research & Manufacturing, Inc. Top agencies DLA (Defense Logistics Agency)	$632,296	0.1%	Rank history: #24 in FY2022, #23 in FY2023, #27 in FY2024 and #17 in FY2025; up 14 since FY2020.
19	Heico Aerospace Corporat Through Seal Dynamics LLC Top agencies DLA (Defense Logistics Agency)	$537,531	0.1%	Rank history: not on the FY2022 list, #30 in FY2023, not on the FY2024 list and #98 in FY2025; new, not ranked in FY2020.
20	Transaero, Inc. Top agencies DLA (Defense Logistics Agency)	$407,483	0.1%	Rank history: #39 in FY2022, #13 in FY2023, #5 in FY2024 and #5 in FY2025; down 6 since FY2020.
21	TEK Precision Co Limited Top agencies DLA (Defense Logistics Agency)	$406,188	0.1%	Rank history: #21 in FY2022, #7 in FY2023, #12 in FY2024 and not on the FY2025 list; up 30 since FY2020.
22	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency)	$385,615	0.1%	Rank history: #13 in FY2022, #20 in FY2023, #31 in FY2024 and #40 in FY2025; up 8 since FY2020.
23	Transdigm Group Incorporated Through Transdigm Inc. Top agencies DLA (Defense Logistics Agency)	$350,336	0.1%	Rank history: #31 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
24	Fulton Supply Company Top agencies DLA (Defense Logistics Agency)	$314,867	0.1%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
25	3M Company Top agencies DLA (Defense Logistics Agency)	$282,326	0.1%	Rank history: #28 in FY2022, not on the FY2023 list, #33 in FY2024 and #15 in FY2025; up 10 since FY2020.
26	HRK Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$260,449	0.1%	Rank history: #41 in FY2022, not on the FY2023 list, #54 in FY2024 and not on the FY2025 list; up 40 since FY2020.
27	Colinear Machine & Design Holdings LLC Top agencies DLA (Defense Logistics Agency)	$257,645	0.1%	Rank history: #65 in FY2022, #71 in FY2023, #92 in FY2024 and not on the FY2025 list; up 11 since FY2020.
28	Arista Aviation Services Group, LLC Through Arista Aviation Services, Llc. Top agencies USAF (Department of the Air Force)	$251,440	0.1%	Rank history: #60 in FY2022, #26 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
29	Rural Route 2, LLC Top agencies DLA (Defense Logistics Agency)	$229,925	0.1%	Rank history: not on the FY2022 list, #16 in FY2023, #26 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
30	Rotair Aerospace Corp Top agencies DLA (Defense Logistics Agency)	$223,978	0.1%	Rank history: #20 in FY2022, #78 in FY2023, #7 in FY2024 and #7 in FY2025; down 19 since FY2020.
31	Honeywell International Inc. 3 awardees Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$221,451	0.1%	Rank history: #19 in FY2022, #8 in FY2023, #10 in FY2024 and not on the FY2025 list; up 16 since FY2020.
32	A.j. Associates Manufacturing & Engineering Co. Inc. Top agencies DLA (Defense Logistics Agency)	$210,807	<0.1%	Rank history: #49 in FY2022, not on the FY2023 list, #28 in FY2024 and #32 in FY2025; up 62 since FY2020.
33	Federal Industries, Inc. Top agencies DLA (Defense Logistics Agency)	$186,820	<0.1%	Rank history: #32 in FY2022, #38 in FY2023, #40 in FY2024 and #51 in FY2025; new, not ranked in FY2020.
34	Martin Military Inc. Top agencies DLA (Defense Logistics Agency)	$182,338	<0.1%	Rank history: #33 in FY2022, #37 in FY2023, #72 in FY2024 and not on the FY2025 list; up 12 since FY2020.
35	Brown Helicopter, Inc. Top agencies DLA (Defense Logistics Agency)	$147,536	<0.1%	Rank history: #27 in FY2022, #43 in FY2023, #48 in FY2024 and #28 in FY2025; up 6 since FY2020.
36	Mechatronics, Inc. Top agencies DLA (Defense Logistics Agency)	$144,210	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Ontic Engineering & Manufacturing, Inc. Top agencies USAF (Department of the Air Force)	$123,450	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	VT Milcom Inc. Top agencies Navy (Department of the Navy)	$116,149	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
39	Warren Machine Technology Inc. Top agencies DLA (Defense Logistics Agency)	$114,325	<0.1%	Rank history: #56 in FY2022, #45 in FY2023, #64 in FY2024 and not on the FY2025 list; up 11 since FY2020.
40	General Nucleonics, Inc. Top agencies Navy (Department of the Navy)	$109,277	<0.1%	Rank history: #22 in FY2022, not on the FY2023 list, #49 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
41	Gigli Enterprises, Inc. Top agencies DLA (Defense Logistics Agency)	$105,934	<0.1%	Rank history: #38 in FY2022, #28 in FY2023, #43 in FY2024 and #60 in FY2025; down 5 since FY2020.
42	Echelon Supply and Service, Inc. Top agencies DLA (Defense Logistics Agency)	$103,179	<0.1%	Rank history: #71 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
43	Aarcorp Through AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$99,985	<0.1%	Rank history: #8 in FY2022, #21 in FY2023, #13 in FY2024 and not on the FY2025 list; down 1 since FY2020.
44	Sargent Aerospace & Defense LLC Through RBC Transport Dynamics Corp Top agencies DLA (Defense Logistics Agency)	$74,880	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
45	Korson, George Top agencies DLA (Defense Logistics Agency)	$72,000	<0.1%	Rank history: #34 in FY2022, #27 in FY2023, #69 in FY2024 and not on the FY2025 list; up 16 since FY2020.
46	Task Research, Inc. Top agencies DLA (Defense Logistics Agency)	$61,548	<0.1%	Rank history: #48 in FY2022, #46 in FY2023, not on the FY2024 list and #80 in FY2025; up 27 since FY2020.
47	Coating Specialties, Inc. Top agencies DLA (Defense Logistics Agency)	$56,915	<0.1%	Rank history: #54 in FY2022, not on the FY2023–FY2024 lists and #58 in FY2025; down 34 since FY2020.
48	BBA Aviation PLC Through Ontic Engineering & Manufacturing, Inc. Top agencies USAF (Department of the Air Force)	$53,674	<0.1%	Rank history: #47 in FY2022, not on the FY2023 list, #63 in FY2024 and not on the FY2025 list; down 4 since FY2020.
49	Statz Corp Top agencies DLA (Defense Logistics Agency)	$51,541	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Apex Manufacturing Company, Inc. Top agencies DLA (Defense Logistics Agency)	$50,484	<0.1%	Rank history: #58 in FY2022, #32 in FY2023, #44 in FY2024 and #14 in FY2025; down 1 since FY2020.
51	Palmer Wahl Instruments Inc. Top agencies DLA (Defense Logistics Agency)	$47,526	<0.1%	Rank history: not on the FY2022 list, #82 in FY2023, #84 in FY2024 and #84 in FY2025; new, not ranked in FY2020.
52	Argencord Machine Corp Inc. Top agencies DLA (Defense Logistics Agency)	$46,037	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 28 since FY2020.
53	Thomas Instrument, Incorporated Top agencies DLA (Defense Logistics Agency)	$45,163	<0.1%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
54	Astro Aircom LLC Top agencies DLA (Defense Logistics Agency)	$41,811	<0.1%	Rank history: not on the FY2022 list, #58 in FY2023, #66 in FY2024 and #47 in FY2025; new, not ranked in FY2020.
55	Tillman Tool Company Inc. Top agencies DLA (Defense Logistics Agency)	$40,388	<0.1%	Rank history: #59 in FY2022, #77 in FY2023, #75 in FY2024 and #92 in FY2025; up 20 since FY2020.
56	BC Machine Inc. Top agencies DLA (Defense Logistics Agency)	$39,882	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
57	US Milpack & Manufacturing Corp Top agencies DLA (Defense Logistics Agency)	$39,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Russell Plastics Technology Company Inc. Top agencies DLA (Defense Logistics Agency)	$33,740	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Danaher Corporation Through Pall Aeropower Corporation Top agencies DLA (Defense Logistics Agency)	$33,669	<0.1%	Rank history: #55 in FY2022, #51 in FY2023, #55 in FY2024 and not on the FY2025 list; down 6 since FY2020.
60	Preci-Manufacturing, Incorporated Top agencies DLA (Defense Logistics Agency)	$29,900	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Ehmke Manufacturing Co Inc. Top agencies Navy (Department of the Navy)	$27,600	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	A G C Incorporated Top agencies DLA (Defense Logistics Agency)	$27,380	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Jo-Kell Inc. Top agencies DLA (Defense Logistics Agency)	$26,952	<0.1%	Rank history: not on the FY2022 list, #49 in FY2023, #78 in FY2024 and #69 in FY2025; new, not ranked in FY2020.
64	Marathonnorco Aerospace, Inc. Top agencies DLA (Defense Logistics Agency)	$25,992	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	First Aviation Services Inc. Through Aviation Blade Services, Inc. Top agencies Navy (Department of the Navy)	$25,685	<0.1%	Rank history: #15 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; down 40 since FY2020.
66	Trust One Components Inc. Top agencies DHS (Department of Homeland Security)	$23,440	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	P & R Trading Incorporated Top agencies DLA (Defense Logistics Agency)	$22,000	<0.1%	Rank history: not on the FY2022–FY2024 lists and #90 in FY2025; new, not ranked in FY2020.
68	W and G Machine Company, Incorporated Top agencies DLA (Defense Logistics Agency)	$21,413	<0.1%	Rank history: #26 in FY2022, #12 in FY2023, #23 in FY2024 and #21 in FY2025; down 40 since FY2020.
69	Usbid Incorporated Through Wbparts Inc. Top agencies DLA (Defense Logistics Agency)	$21,250	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Dutch Valley Supply Co. Top agencies DLA (Defense Logistics Agency)	$20,617	<0.1%	Rank history: #57 in FY2022, not on the FY2023–FY2024 lists and #61 in FY2025; new, not ranked in FY2020.
71	Aviarms Support Corp Top agencies DLA (Defense Logistics Agency)	$19,871	<0.1%	Rank history: #44 in FY2022, #36 in FY2023, #46 in FY2024 and #55 in FY2025; up 30 since FY2020.
72	Lynn Electronics LLC Top agencies DLA (Defense Logistics Agency)	$19,589	<0.1%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; down 48 since FY2020.
73	RTC Aerospace, LLC Through Logistical Support LLC Top agencies DLA (Defense Logistics Agency)	$19,375	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Allient Inc. Through Globe Motors, Inc. Top agencies USAF (Department of the Air Force)	$19,122	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Freehold Manufacturing Assembly Company, Inc. Top agencies DLA (Defense Logistics Agency)	$18,874	<0.1%	Rank history: not on the FY2022 list, #62 in FY2023, #97 in FY2024 and not on the FY2025 list; down 18 since FY2020.
76	Parker-Hannifin Corporation 3 awardees Top agencies DLA (Defense Logistics Agency)	$17,731	<0.1%	Rank history: #17 in FY2022, #10 in FY2023 and not on the FY2024–FY2025 lists; down 21 since FY2020.
77	FBC Enterprises LLC Top agencies DLA (Defense Logistics Agency)	$17,000	<0.1%	Rank history: not on the FY2022–FY2024 lists and #52 in FY2025; new, not ranked in FY2020.
78	AAR Supply Chain, Inc. Top agencies DLA (Defense Logistics Agency)	$15,510	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
79	Green Glade Welding, Inc. Top agencies Navy (Department of the Navy)	$14,259	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Dynamic Solutions Systems, Inc. Top agencies Army (Department of the Army)	$13,968	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Pride Electronics Inc. Top agencies DLA (Defense Logistics Agency)	$13,296	<0.1%	Rank history: #84 in FY2022, #96 in FY2023, not on the FY2024 list and #77 in FY2025; up 30 since FY2020.
82	James Ippolito & Co. of Connecticut, Inc. Top agencies DLA (Defense Logistics Agency)	$12,095	<0.1%	Rank history: #62 in FY2022, not on the FY2023 list, #89 in FY2024 and #68 in FY2025; up 6 since FY2020.
83	Basic Rubber and Plastics Co. Top agencies DLA (Defense Logistics Agency)	$11,938	<0.1%	Rank history: #63 in FY2022, #53 in FY2023, #68 in FY2024 and #86 in FY2025; up 22 since FY2020.
84	BAE Systems PLC Through BAE Systems Controls Inc. Top agencies Navy (Department of the Navy)	$11,913	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
85	White Aero Inc. Top agencies DLA (Defense Logistics Agency)	$10,932	<0.1%	Rank history: #90 in FY2022, #85 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2020.
86	Rexnord Industries LLC Top agencies DLA (Defense Logistics Agency)	$10,653	<0.1%	Rank history: #83 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; down 63 since FY2020.
87	Hydraulics International, Inc. Top agencies Navy (Department of the Navy)	$10,257	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Beta Shim Co. Top agencies DLA (Defense Logistics Agency)	$9,608	<0.1%	Rank history: #74 in FY2022, #65 in FY2023, #80 in FY2024 and #76 in FY2025; new, not ranked in FY2020.
89	Aviatrix Inc. Top agencies DLA (Defense Logistics Agency)	$9,468	<0.1%	Rank history: #70 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; down 20 since FY2020.
90	WFM Manufacturing & Supply Inc. Top agencies DLA (Defense Logistics Agency)	$9,129	<0.1%	Rank history: #92 in FY2022, not on the FY2023–FY2024 lists and #88 in FY2025; new, not ranked in FY2020.
91	Skyspares Parts Inc. Top agencies DLA (Defense Logistics Agency)	$8,990	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Pall Aeropower Corporation Top agencies DLA (Defense Logistics Agency)	$8,700	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Synercom Inc Through Spectrum Associates, Inc. Top agencies DLA (Defense Logistics Agency)	$8,247	<0.1%	Rank history: #73 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; down 17 since FY2020.
94	CU Enterprises Ltd Through C U Enterprises Ltd Top agencies DLA (Defense Logistics Agency)	$7,832	<0.1%	Rank history: #81 in FY2022, #79 in FY2023, not on the FY2024 list and #82 in FY2025; down 27 since FY2020.
95	ARA Engineering Top agencies DLA (Defense Logistics Agency)	$7,050	<0.1%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
96	Hupp & Associates Inc. Top agencies DLA (Defense Logistics Agency)	$6,942	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Arizona Aircraft Spares, LLC Top agencies DLA (Defense Logistics Agency)	$6,300	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Polytronix, Inc. Top agencies DLA (Defense Logistics Agency)	$5,090	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Lift-A-Loft, LLC Top agencies Navy (Department of the Navy)	$4,998	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Aviation Procurement Systems, LLC Top agencies DLA (Defense Logistics Agency)	$4,984	<0.1%	Rank history: #85 in FY2022, #61 in FY2023, #60 in FY2024 and #70 in FY2025; new, not ranked in FY2020.

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100 of 126 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 $426 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 1615 contractors in FY2021?

1. Lockheed Martin Corporation ($191M), 2. The Boeing Company ($140M), 3. Sikorsky Aircraft Corporation ($15.6M), 4. Overhaul Support Services, LLC ($5.37M), 5. Textron Inc. ($5.34M), 6. PCX Aerostructures LLC ($5.22M), 7. Airbus Americas Inc. ($3.12M), 8. General Electric Company ($2.4M), 9. RTX Corporation ($2.09M), 10. Bell Textron Inc. ($1.9M).

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