Company lists · Data refreshed September 2026

Top 25 Plastic part manufacturers based in the United States

Name: Plastic part manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,711 companies tracked

RevenueBase identified 1,711 plastic part manufacturers headquartered in the United States as of September 2026 and tracks 44,388 professional contacts across them, including 11,453 with verified work emails. Grand Rapids is the largest hub.

This list covers plastic part manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

1,711Companies

44,388Contacts tracked

11,453Verified emails

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The 25 largest plastic part manufacturers based in the United States

Ranked by team size

Top 25 of 1,711 plastic part manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to plastic part manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Milacron	Strong evidence	Batavia, OH, United StatesHQ checked Sep 30, 2026	5,001-10,000	1,290 contacts →
	Strong evidence “Milacron is a global leader in the manufacture, distribution, and service of highly engineered and customized systems within the plastic technology and processing industry.” Source: RevenueBase Database · checked Sep 30, 2026
2	US Farathane	Strong evidence	Auburn Hills, MI, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,163 contacts →
	Strong evidence “At US Farathane, we design and manufacture highly engineered plastic injection-molded components, make them available to you in a variety of sizes, shapes, and designs and supply…” Source: RevenueBase Database · checked Sep 30, 2026
3	Technimark LLC	Partial evidence	Asheboro, NC, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,006 contacts →
	Partial evidence “Founded in 1983, Technimark is a global leader and manufacturer of high-value injection-molded packaging and components serving the consumer packaging, healthcare and industrial…” Source: RevenueBase Database · checked Sep 30, 2026
4	Inteplast Group	Strong evidence	Livingston, NJ, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,006 contacts →
	Strong evidence “About Inteplast Group Founded in 1991, Inteplast Group is the largest manufacturer of integrated plastics in North America, offering a wide variety of quality products.” Source: RevenueBase Database · checked Sep 30, 2026
5	Brentwood Industries, INC	Partial evidence	Reading, PA, United StatesHQ checked Sep 30, 2026	501-1,000	637 contacts →
	Partial evidence “Brentwood is a leading provider of thermoformed plastic solutions to a wide variety of consumer, manufacturing, and environmental industries.” Source: RevenueBase Database · checked Sep 30, 2026
6	Flambeau, INC	Indirect evidence	Baraboo, WI, United StatesHQ checked Sep 30, 2026	1,001-5,000	495 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
7	Royal Technologies Corp	Indirect evidence	Hudsonville, MI, United StatesHQ checked Sep 30, 2026	1,001-5,000	492 contacts →
	Indirect evidence “Royal Technologies is an advanced engineering and manufacturing company serving industries as diverse as automotive, furniture, and consumer products.” Source: RevenueBase Database · checked Sep 30, 2026
8	Evco Plastics	Indirect evidence	Deforest, WI, United StatesHQ checked Sep 30, 2026	1,001-5,000	489 contacts →
	Indirect evidence “Precision.” Source: RevenueBase Database · checked Sep 30, 2026
9	Spectrum Plastics Group, A Dupont Business	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 30, 2026	1,001-5,000	487 contacts →
	Indirect evidence “Acquired in August 2023 by DuPont, Spectrum’s history spans over 60 years of applications expertise including precision extrusion, specialty injection molding, blown film…” Source: RevenueBase Database · checked Sep 30, 2026
10	Mack Molding Company	Indirect evidence	Arlington, VT, United StatesHQ checked Sep 30, 2026	1,001-5,000	453 contacts →
	Indirect evidence “Mack Molding Co, headquartered in Arlington, VT, provides design through FDA-approved manufacturing services to the medical, commercial, computer & business equipment, energy and…” Source: RevenueBase Database · checked Sep 30, 2026
11	Montaplast Of North America	Indirect evidence	Frankfort, KY, United StatesHQ checked Sep 30, 2026	501-1,000	399 contacts →
	Indirect evidence “Founded in 1958 by Albert Stulz Sr.” Source: RevenueBase Database · checked Sep 30, 2026
12	Century Mold Co. INC	Partial evidence	Rochester, NY, United StatesHQ checked Sep 30, 2026	1,001-5,000	375 contacts →
	Partial evidence “Century Mold is a leading North American plastic injection molder who dominates the automotive industry.” Source: RevenueBase Database · checked Sep 30, 2026
13	Primex	Partial evidence	Richmond, IN, United StatesHQ checked Sep 30, 2026	1,001-5,000	369 contacts →
	Partial evidence “Primex, founded in 1965, is a global leader in the extruded plastics industry.” Source: RevenueBase Database · checked Sep 30, 2026
14	Plastic Products Company INC	Partial evidence	Lindstrom, MN, United StatesHQ checked Sep 30, 2026	501-1,000	347 contacts →
	Partial evidence “At Plastic Products Company (PPC), we are committed to eagerly serving your needs.” Source: RevenueBase Database · checked Sep 30, 2026
15	PEXCO	Strong evidence	Alpharetta, GA, United StatesHQ checked Sep 30, 2026	501-1,000	332 contacts →
	Strong evidence “Pexco is a leading manufacturer of high-performance plastic solutions engineered for manufacturers and end-users across North America.” Source: RevenueBase Database · checked Sep 30, 2026
16	Plastikon Industries INC	Strong evidence	Hayward, CA, United StatesHQ checked Sep 30, 2026	201-500	325 contacts →
	Strong evidence “PLASTIKON INDUSTRIES was established in 1982 with the mission to be recognized as a world-leading plastic and contract manufacturer.” Source: RevenueBase Database · checked Sep 30, 2026
17	Engineered Plastic Components	Partial evidence	West Des Moines, IA, United StatesHQ checked Sep 30, 2026	1,001-5,000	308 contacts →
	Partial evidence “EPC is your one-stop shop for your plastic injection molded products.” Source: RevenueBase Database · checked Sep 30, 2026
18	EG Industries Leader In Plastic Injection Molding, Tooling, And Automation	Indirect evidence	Circleville, OH, United StatesHQ checked Sep 30, 2026	501-1,000	296 contacts →
	Indirect evidence “EG Industries was founded in 1981 as a Tier 1 supplier to the automotive industry.” Source: RevenueBase Database · checked Sep 30, 2026
19	Dlhbowles	Partial evidence	Columbia, MD, United StatesHQ checked Sep 30, 2026	1,001-5,000	291 contacts →
	Partial evidence “dlhBOWLES is a premier supplier of innovative engineered plastic solutions to many of the largest corporations and most recognizable brands around the globe in the automotive and…” Source: RevenueBase Database · checked Sep 30, 2026
20	Curbell Plastics	Partial evidence	Orchard Park, NY, United StatesHQ checked Sep 30, 2026	51-200	282 contacts →
	Partial evidence “At Curbell Plastics, we are proud that we’ve grown into one of the nation’s top-five plastic materials suppliers by investing for sustainable growth and focusing foremost on the…” Source: RevenueBase Database · checked Sep 30, 2026
21	Precision Concepts International LLC	Strong evidence	Huntersville, NC, United StatesHQ checked Sep 30, 2026	1,001-5,000	267 contacts →
	Strong evidence “Precision Concepts is a leading plastic manufacturer providing products you experience in your daily life.” Source: RevenueBase Database · checked Sep 30, 2026
22	Alexandria Industries	Indirect evidence	Alexandria, MN, United StatesHQ checked Sep 30, 2026	501-1,000	214 contacts →
	Indirect evidence “Alexandria Industries: 60 Years of Turning Possibility into Product (1966–2026) In 1966, we began as a single-service extrusion shop with a vision for quality.” Source: RevenueBase Database · checked Sep 30, 2026
23	Gemini Group, INC	Partial evidence	Bad Axe, MI, United StatesHQ checked Sep 30, 2026	1,001-5,000	211 contacts →
	Partial evidence “Gemini Group is a leading supplier of engineered plastic products and metal tooling solutions.” Source: RevenueBase Database · checked Sep 30, 2026
24	Xaloy LLC	Partial evidence	Austintown, OH, United StatesHQ checked Sep 30, 2026	501-1,000	205 contacts →
	Partial evidence “Xaloy: A Global Leader in Plastics As the global leader in high-performance machinery components and equipment for the plastics industry, Xaloy has powerful resources to help…” Source: RevenueBase Database · checked Sep 30, 2026
25	Custom-Pak, INC	Partial evidence	Clinton, IA, United StatesHQ checked Sep 30, 2026	501-1,000	198 contacts →
	Partial evidence “Plastic blow molder with full design, manufacturing and fulfillment capacities.” Source: RevenueBase Database · checked Sep 30, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: plastic part manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names plastic part manufacturers.
Partial evidence: Its own public description names part of plastic part manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name plastic part manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,711 plastic part manufacturers based in the United States

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Plastic part manufacturers based in the United States at a glance

As of Sep 30, 2026

25.8%Verified-email coverage

25.9Average contacts per company

11-50Median size (employees)

0.9%Largest-city concentration · Grand Rapids

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

420

11-50

636

51-200

465

201-500

129

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,711 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among plastic part manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “plastic part manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names plastic part manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among plastic part manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 11,453 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names plastic part manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many plastic part manufacturers are there based in the United States?

RevenueBase identified 1,711 plastic part manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Milacron, headquartered in Batavia, tops this list with the largest team on record.

Which city has the most plastic part manufacturers?

Grand Rapids leads with 15 headquartered companies, followed by Houston (14) and Rochester (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 11,453 verified decision-maker contacts tracked across these 1,711 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.