Top 100 Contractors in NAICS 339950: Sign Manufacturing, FY2021

Name: Top 100 Contractors in NAICS 339950: Sign Manufacturing, FY2021
Creator: GovTribe

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

The top 10 won 56% of FY2021 NAICS 339950 contract dollars

Contract obligations: $23,401,271 Net of deobligations, by contracts coded NAICS 339950
Contractors: 235 Parent companies with an obligation
Largest contractor: Janson Communications, Inc. $4.91 million, 20.4% 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	Janson Communications, Inc. Top agencies Army (Department of the Army)	$4,912,740	20.4%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
2	ACF Technologies, Inc. Top agencies DHA (Defense Health Agency) Army (Department of the Army)	$2,109,471	8.8%	Rank history: #2 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
3	Traffic & Parking Control Co., LLC Top agencies GSA (General Services Administration) DECA (Defense Commissary Agency) Army (Department of the Army)	$1,834,422	7.6%	Rank history: #13 in FY2022, #27 in FY2023, #26 in FY2024 and #57 in FY2025; down 1 since FY2020.
4	Government of the United States Through Federal Prison Industries, Inc. Top agencies DOI (Department of the Interior) DOJ (Department of Justice) DHS (Department of Homeland Security)	$976,118	4.1%	Rank history: #8 in FY2022, #20 in FY2023, #12 in FY2024 and #27 in FY2025; up 4 since FY2020.
5	Veterans4You LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DHS (Department of Homeland Security)	$864,954	3.6%	Rank history: #4 in FY2022, #9 in FY2023, #72 in FY2024 and #23 in FY2025; up 2 since FY2020.
6	The Boeing Company 2 awardees, including Boeing Distribution Services X, Inc. and Boeing Distribution Services, Inc. Top agencies DLA (Defense Logistics Agency)	$687,272	2.9%	Rank history: #7 in FY2022, #5 in FY2023, #3 in FY2024 and #2 in FY2025; up 210 since FY2020.
7	WL Concepts & Production, Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) Army (Department of the Army)	$683,649	2.8%	Rank history: #1 in FY2022, #1 in FY2023 and not on the FY2024–FY2025 lists; up 26 since FY2020.
8	Rocky Mountain Aluminum Sign & Supply LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$521,093	2.2%	Rank history: #5 in FY2022, #13 in FY2023, #9 in FY2024 and #7 in FY2025; up 8 since FY2020.
9	System 2 / 90, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice) MDA (DOD Missile Defense Agency)	$519,977	2.2%	Rank history: #3 in FY2022, #11 in FY2023, #6 in FY2024 and #16 in FY2025; down 6 since FY2020.
10	Hardy Enterprises LLC Top agencies DOI (Department of the Interior) USAF (Department of the Air Force)	$445,600	1.9%	Rank history: #21 in FY2022, #19 in FY2023, #28 in FY2024 and #30 in FY2025; up 30 since FY2020.
11	Signs Plus, New Ideas-New Technology, Inc. Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) USAF (Department of the Air Force)	$421,120	1.7%	Rank history: #17 in FY2022, #70 in FY2023, #46 in FY2024 and not on the FY2025 list; down 2 since FY2020.
12	Creative Sign Service Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) Treasury (Department of the Treasury)	$365,338	1.5%	Rank history: #9 in FY2022, #7 in FY2023, #16 in FY2024 and #19 in FY2025; up 33 since FY2020.
13	Entech Associates / Entech Signs - Alpha Led, LLC Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) GSA (General Services Administration)	$331,299	1.4%	Rank history: #25 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
14	J & N Marketing, Inc. Top agencies DOI (Department of the Interior)	$278,824	1.2%	Rank history: #84 in FY2022, #47 in FY2023, not on the FY2024 list and #99 in FY2025; new, not ranked in FY2020.
15	Rockart Industries LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$275,172	1.1%	Rank history: #64 in FY2022, #30 in FY2023, #33 in FY2024 and not on the FY2025 list; up 42 since FY2020.
16	Colonial Supplies LLC Top agencies Navy (Department of the Navy) GSA (General Services Administration) USAF (Department of the Air Force)	$266,086	1.1%	Rank history: #30 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
17	SDV Office Systems LLC Top agencies VA (Department of Veterans Affairs)	$256,817	1.1%	Rank history: #6 in FY2022, #4 in FY2023, #2 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
18	K & K Systems, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) USAF (Department of the Air Force)	$256,709	1.1%	Rank history: #15 in FY2022, #12 in FY2023, #21 in FY2024 and #11 in FY2025; down 5 since FY2020.
19	Schneider Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$255,876	1.1%	Rank history: not on the FY2022–FY2025 lists; up 73 since FY2020.
20	Medianow, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$233,955	1.0%	Rank history: #63 in FY2022, #21 in FY2023, #11 in FY2024 and #15 in FY2025; up 4 since FY2020.
21	Short-Line Corp Top agencies USAF (Department of the Air Force)	$218,000	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	LN Curtis & Sons Top agencies DLA (Defense Logistics Agency)	$217,153	0.9%	Rank history: #19 in FY2022, #48 in FY2023, not on the FY2024 list and #26 in FY2025; up 30 since FY2020.
23	First Vanguard Rentals & Sales, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$215,267	0.9%	Rank history: #86 in FY2022, #39 in FY2023, #27 in FY2024 and #9 in FY2025; up 7 since FY2020.
24	Sound Masking USA LLC Top agencies VA (Department of Veterans Affairs)	$204,313	0.8%	Rank history: #23 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
25	Blankenship Group Inc. Top agencies USAF (Department of the Air Force)	$192,022	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	Sayres and Associates LLC Top agencies VA (Department of Veterans Affairs)	$174,196	0.7%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
27	All Traffic Solutions, Inc. Top agencies DOI (Department of the Interior) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$168,233	0.7%	Rank history: #27 in FY2022, #40 in FY2023, #39 in FY2024 and #47 in FY2025; down 10 since FY2020.
28	Poblocki Sign Company LLC Top agencies HHS (Department of Health and Human Services)	$164,597	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Sea Reach, Ltd Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$152,458	0.6%	Rank history: #46 in FY2022, #15 in FY2023, #10 in FY2024 and #4 in FY2025; up 34 since FY2020.
30	Ebsco Industries Inc. Through Redmont Sign LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DOI (Department of the Interior)	$148,339	0.6%	Rank history: #29 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
31	Lsdi Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$146,595	0.6%	Rank history: #16 in FY2022, #49 in FY2023, not on the FY2024 list and #36 in FY2025; up 5 since FY2020.
32	Millenium Products, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$141,155	0.6%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
33	The Pannier Corporation Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$118,444	0.5%	Rank history: #48 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
34	PMA 13 Inc. Top agencies DOS (Department of State) EPA (Environmental Protection Agency) DOJ (Department of Justice)	$111,445	0.5%	Rank history: #96 in FY2022, not on the FY2023–FY2024 lists and #41 in FY2025; up 63 since FY2020.
35	Partition Plus Inc. Top agencies Smithsonian (Smithsonian Institution)	$107,518	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Wisecom Technologies Inc. Top agencies Army (Department of the Army)	$101,480	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
37	Apco Graphics, Inc. Top agencies DOS (Department of State) Army (Department of the Army) USAF (Department of the Air Force)	$93,242	0.4%	Rank history: #52 in FY2022, not on the FY2023 list, #77 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
38	Color-Ad, Inc. Top agencies DOI (Department of the Interior)	$92,085	0.4%	Rank history: #11 in FY2022, #3 in FY2023, #8 in FY2024 and not on the FY2025 list; down 27 since FY2020.
39	GPC Consolidated Reporting Top agencies USDA (Department of Agriculture) USAID (US Agency for International Development)	$86,624	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	KVO Industries Inc. Top agencies DOI (Department of the Interior)	$85,580	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Architectural Signing Associates, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) GSA (General Services Administration)	$79,452	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Meak Solutions Llc. Top agencies VA (Department of Veterans Affairs)	$77,000	0.3%	Rank history: not on the FY2022–FY2023 lists, #99 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
43	AMG Company, Inc. Top agencies DOI (Department of the Interior)	$72,438	0.3%	Rank history: #53 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
44	Davinci Signs, LLC Top agencies USAF (Department of the Air Force)	$71,111	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Lavi Industries, LLC Top agencies DHS (Department of Homeland Security) DECA (Defense Commissary Agency)	$68,360	0.3%	Rank history: not on the FY2022–FY2023 lists, #50 in FY2024 and #10 in FY2025; down 10 since FY2020.
46	Duncor LLC Top agencies DOI (Department of the Interior)	$66,535	0.3%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
47	Agas MFG Inc. Top agencies DLA (Defense Logistics Agency)	$64,543	0.3%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
48	Federal Prison Industries, Inc. Top agencies DOI (Department of the Interior)	$64,014	0.3%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
49	The Cincinnati Association for the Blind Top agencies DOS (Department of State)	$63,923	0.3%	Rank history: #79 in FY2022, #66 in FY2023, #36 in FY2024 and not on the FY2025 list; up 27 since FY2020.
50	Hadley Exhibits, Inc. Top agencies DOJ (Department of Justice)	$62,819	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
51	Illinois Avenue Partners LLC Top agencies USAF (Department of the Air Force)	$58,614	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Bren Instruments, Inc. Top agencies GSA (General Services Administration)	$57,776	0.2%	Rank history: not on the FY2022 list, #68 in FY2023, #53 in FY2024 and #35 in FY2025; up 91 since FY2020.
53	Big Apple Sign Corp. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$57,400	0.2%	Rank history: #31 in FY2022, #26 in FY2023, #13 in FY2024 and not on the FY2025 list; down 31 since FY2020.
54	Encompass Digital Media Inc. Through Playcraft Systems LLC Top agencies Army (Department of the Army)	$56,443	0.2%	Rank history: not on the FY2022 list, #28 in FY2023 and not on the FY2024–FY2025 lists; down 44 since FY2020.
55	Phoenix Contracting LLC Top agencies Army (Department of the Army)	$56,167	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	ASI Sign Systems, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$53,046	0.2%	Rank history: #34 in FY2022, not on the FY2023–FY2024 lists and #87 in FY2025; up 2 since FY2020.
57	Nomadic Display Capitol, Inc. Top agencies Army (Department of the Army)	$52,558	0.2%	Rank history: not on the FY2022–FY2025 lists; down 36 since FY2020.
58	Siliconcore Technology, Inc. Top agencies VA (Department of Veterans Affairs)	$52,526	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	General Dynamics Corporation 3 awardees, including Electric Boat Corporation, General Dynamics-Ots, Inc. and General Dynamics Land Systems Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$52,256	0.2%	Rank history: not on the FY2022–FY2025 lists; up 154 since FY2020.
60	Blanc Industries Inc. Top agencies DECA (Defense Commissary Agency)	$52,215	0.2%	Rank history: #42 in FY2022, #74 in FY2023 and not on the FY2024–FY2025 lists; down 41 since FY2020.
61	The Art Source. Inc. Top agencies Navy (Department of the Navy)	$51,565	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	William P. Gelberg Inc. Top agencies Smithsonian (Smithsonian Institution)	$51,415	0.2%	Rank history: not on the FY2022–FY2024 lists and #12 in FY2025; new, not ranked in FY2020.
63	ACE Signs of Arkansas L.L.C. Top agencies USAF (Department of the Air Force)	$51,096	0.2%	Rank history: #85 in FY2022, not on the FY2023–FY2024 lists and #50 in FY2025; up 31 since FY2020.
64	Signdealz Corporation Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$49,915	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Thundercat Technology, LLC Top agencies DOS (Department of State)	$49,909	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Anna Lisa Luna Construction, Inc. Top agencies USAF (Department of the Air Force)	$47,915	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Awen Solutions Group, LLC Top agencies VA (Department of Veterans Affairs)	$47,739	0.2%	Rank history: #38 in FY2022, #34 in FY2023, #66 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
68	A Dog Solutions, Inc. Top agencies DOJ (Department of Justice)	$47,244	0.2%	Rank history: not on the FY2022 list, #71 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
69	TLC Construction Top agencies DOI (Department of the Interior)	$46,988	0.2%	Rank history: #22 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
70	B&A Metal Graphics, Inc. Top agencies DHS (Department of Homeland Security) Commerce (Department of Commerce)	$42,484	0.2%	Rank history: #68 in FY2022, #77 in FY2023, #70 in FY2024 and not on the FY2025 list; up 29 since FY2020.
71	Tyrrelltech, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$42,290	0.2%	Rank history: #49 in FY2022, #69 in FY2023, #24 in FY2024 and #70 in FY2025; down 46 since FY2020.
72	Marketing Displays Inc. Top agencies GSA (General Services Administration)	$41,125	0.2%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
73	American Signal Company Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$38,969	0.2%	Rank history: #40 in FY2022, #55 in FY2023, #35 in FY2024 and #53 in FY2025; down 27 since FY2020.
74	Complete Signs LLC Top agencies USAF (Department of the Air Force)	$37,669	0.2%	Rank history: #77 in FY2022, #76 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
75	Twin Lakes Electric LLC Top agencies Army (Department of the Army)	$36,676	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Southern Custom Exhibits of Alabama, Inc. Top agencies DOI (Department of the Interior)	$36,608	0.2%	Rank history: not on the FY2022–FY2025 lists; down 61 since FY2020.
77	Blind Dog Productions, Ltd. Top agencies Smithsonian (Smithsonian Institution) DOI (Department of the Interior)	$36,528	0.2%	Rank history: not on the FY2022–FY2023 lists, #73 in FY2024 and not on the FY2025 list; up 63 since FY2020.
78	Kampi Components Co Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$36,438	0.2%	Rank history: #61 in FY2022, not on the FY2023–FY2024 lists and #91 in FY2025; up 55 since FY2020.
79	Brenner Metal Products Corp Top agencies DLA (Defense Logistics Agency)	$36,021	0.1%	Rank history: not on the FY2022–FY2023 lists, #47 in FY2024 and #86 in FY2025; new, not ranked in FY2020.
80	Keller Advertising and Media Services, Inc. Top agencies USAF (Department of the Air Force)	$34,917	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Boeing Distribution Services X, Inc. Top agencies DLA (Defense Logistics Agency)	$34,152	0.1%	Rank history: #50 in FY2022, not on the FY2023–FY2024 lists and #64 in FY2025; new, not ranked in FY2020.
82	Banana Banner, Inc. Top agencies Army (Department of the Army)	$33,641	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Playcraft Systems LLC Top agencies Army (Department of the Army)	$33,311	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	Apple Rock Advertising & Promotion, Inc. Top agencies Army (Department of the Army)	$32,095	0.1%	Rank history: not on the FY2022–FY2023 lists, #43 in FY2024 and #34 in FY2025; new, not ranked in FY2020.
85	Interwest Safety Supply, LLC Top agencies USDA (Department of Agriculture)	$31,998	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	F.w. Haxel Company Top agencies VA (Department of Veterans Affairs)	$31,989	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	Sign Pro of Quincy, Inc. Top agencies Navy (Department of the Navy)	$31,805	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Plaques Plus Inc. Top agencies VA (Department of Veterans Affairs)	$31,188	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Environment of Care Solutions LLC Top agencies VA (Department of Veterans Affairs)	$30,477	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	C.r. & A. Custom Apparel Inc. Top agencies Army (Department of the Army)	$29,900	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Emergency Planning Management Inc. Top agencies VA (Department of Veterans Affairs)	$28,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	American Plaque Company Top agencies USAF (Department of the Air Force)	$27,869	0.1%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
93	Art Signworks Inc. Top agencies DOI (Department of the Interior)	$27,616	0.1%	Rank history: #80 in FY2022, #41 in FY2023, #25 in FY2024 and not on the FY2025 list; down 59 since FY2020.
94	Interpretive Graphics Signs & Systems, Inc. Top agencies DOI (Department of the Interior)	$27,528	0.1%	Rank history: not on the FY2022 list, #81 in FY2023, #51 in FY2024 and not on the FY2025 list; up 29 since FY2020.
95	Sr-Services GMBH Top agencies DISA (Defense Information Systems Agency)	$27,200	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Innerface Architectural Signage Inc. Top agencies DOJ (Department of Justice)	$26,754	0.1%	Rank history: not on the FY2022 list, #23 in FY2023, #55 in FY2024 and not on the FY2025 list; up 14 since FY2020.
97	Rosco, LLC Top agencies DLA (Defense Logistics Agency)	$24,887	0.1%	Rank history: not on the FY2022–FY2025 lists; up 66 since FY2020.
98	Nelcy Construction Corp Top agencies DOI (Department of the Interior)	$24,799	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	Amor Sign Studios, Inc. Top agencies DHS (Department of Homeland Security)	$24,599	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Motson Graphics Inc. Top agencies DLA (Defense Logistics Agency)	$23,574	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 235 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 $24.1 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. 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 NAICS 339950 contractors in FY2021?

1. Janson Communications, Inc. ($4.91M), 2. ACF Technologies, Inc. ($2.11M), 3. Traffic & Parking Control Co., LLC ($1.83M), 4. Government of the United States ($976K), 5. Veterans4You LLC ($865K), 6. The Boeing Company ($687K), 7. WL Concepts & Production, Inc. ($684K), 8. Rocky Mountain Aluminum Sign & Supply LLC ($521K), 9. System 2 / 90, Inc. ($520K), 10. Hardy Enterprises LLC ($446K).

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