Company lists · Data refreshed September 2026

Top 25 Engineering plastics manufacturers based in the United States

Name: Engineering plastics 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 16, 2026 915 companies tracked

RevenueBase identified 915 engineering plastics manufacturers headquartered in the United States as of September 2026 and tracks 36,247 professional contacts across them, including 11,669 with verified work emails. Houston is the largest hub.

This list covers engineering plastics 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 16, 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 16, 2026 86% judged on-target in blind review

915Companies

36,247Contacts tracked

11,669Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest engineering plastics manufacturers based in the United States

Ranked by team size

Top 25 of 915 engineering plastics manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to engineering plastics 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	Saint-Gobain Performance Plastics	Indirect evidence	Solon, OH, United StatesHQ checked Sep 16, 2026	5,001-10,000	1,658 contacts →
	Indirect evidence “Saint-Gobain is the world’s leading producer of engineered high performance polymer products for virtually every industry around the globe, including automotive, medical…” Source: RevenueBase Database · checked Sep 16, 2026
2	Milacron	Strong evidence	Batavia, OH, United StatesHQ checked Sep 16, 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 16, 2026
3	US Farathane	Strong evidence	Auburn Hills, MI, United StatesHQ checked Sep 16, 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 16, 2026
4	Greene Tweed	Partial evidence	Lansdale, PA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,129 contacts →
	Partial evidence “Greene Tweed is a leading global manufacturer of high-performance thermoplastics, composites, seals, and engineered components that outperform and outlast in the world’s harshest…” Source: RevenueBase Database · checked Sep 16, 2026
5	Inteplast Group	Strong evidence	Livingston, NJ, United StatesHQ checked Sep 16, 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 16, 2026
6	RTP Company	Indirect evidence	Winona, MN, United StatesHQ checked Sep 16, 2026	1,001-5,000	686 contacts →
	Indirect evidence “RTP Company, headquartered in Winona, Minn, is a global compounder of custom engineered thermoplastics.” Source: RevenueBase Database · checked Sep 16, 2026
7	Brentwood Industries, INC	Partial evidence	Reading, PA, United StatesHQ checked Sep 16, 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 16, 2026
8	Inoac Usa, INC	Strong evidence	Troy, MI, United StatesHQ checked Sep 16, 2026	1,001-5,000	602 contacts →
	Strong evidence “INOAC Corporation, founded in 1926 and headquartered in Nagoya, Japan, is a global manufacturer specializing in functional materials such as polyurethane, rubber, plastics, and…” Source: RevenueBase Database · checked Sep 16, 2026
9	Flambeau, INC	Indirect evidence	Baraboo, WI, United StatesHQ checked Sep 16, 2026	1,001-5,000	495 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
10	Royal Technologies Corp	Partial evidence	Hudsonville, MI, United StatesHQ checked Sep 16, 2026	1,001-5,000	492 contacts →
	Partial 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 16, 2026
11	Nexeo Plastics	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 16, 2026	501-1,000	468 contacts →
	Partial evidence “Nexeo Plastics is a leading global thermoplastic resins distributor, representing quality products from world-class suppliers, and serving a diverse customer base across North…” Source: RevenueBase Database · checked Sep 16, 2026
12	Plaskolite	Indirect evidence	Columbus, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	448 contacts →
	Indirect evidence “PLASKOLITE is the catalyst for thermoplastic innovation that accelerates transformation.” Source: RevenueBase Database · checked Sep 16, 2026
13	Core Molding Technologies	Indirect evidence	Columbus, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	441 contacts →
	Indirect evidence “Core Molding Technologies is a leading engineered materials company specializing in molded structural products, principally in building products, utilities, transportation and…” Source: RevenueBase Database · checked Sep 16, 2026
14	Montaplast Of North America	Indirect evidence	Frankfort, KY, United StatesHQ checked Sep 16, 2026	501-1,000	399 contacts →
	Indirect evidence “Founded in 1958 by Albert Stulz Sr.” Source: RevenueBase Database · checked Sep 16, 2026
15	Geon Performance Solutions	Indirect evidence	Westlake, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	388 contacts →
	Indirect evidence “Geon® Performance Solutions unlocks the power of polymers for the future.” Source: RevenueBase Database · checked Sep 16, 2026
16	Century Mold Co. INC	Partial evidence	Rochester, NY, United StatesHQ checked Sep 16, 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 16, 2026
17	Primex	Partial evidence	Richmond, IN, United StatesHQ checked Sep 16, 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 16, 2026
18	Spartech LLC	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 16, 2026	501-1,000	343 contacts →
	Indirect evidence “Spartech has 11 U.S.” Source: RevenueBase Database · checked Sep 16, 2026
19	PEXCO	Strong evidence	Alpharetta, GA, United StatesHQ checked Sep 16, 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 16, 2026
20	Techmer PM	Partial evidence	Clinton, TN, United StatesHQ checked Sep 16, 2026	501-1,000	319 contacts →
	Partial evidence “Techmer PM is a leading materials design company that works in partnership with plastics processors, OEMs, and designers to solve some of their most difficult business…” Source: RevenueBase Database · checked Sep 16, 2026
21	Advanced Composites	Indirect evidence	Sidney, OH, United StatesHQ checked Sep 16, 2026	201-500	307 contacts →
	Indirect evidence “Advanced Composites is the leading supplier of TPO’s (Thermoplastic Olefins) and Polypropylene Compounds to the North American Automotive Industry.” Source: RevenueBase Database · checked Sep 16, 2026
22	Spartech Corporation	Indirect evidence	Avon Lake, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	300 contacts →
	Indirect evidence “Designed Structures and Solutions As part of PolyOne's unmatched portfolio of innovative polymer solutions, the selection of solutions offered by Designed Structures and Solutions…” Source: RevenueBase Database · checked Sep 16, 2026
23	EG Industries Leader In Plastic Injection Molding, Tooling, And Automation	Indirect evidence	Circleville, OH, United StatesHQ checked Sep 16, 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 16, 2026
24	Dlhbowles	Partial evidence	Columbia, MD, United StatesHQ checked Sep 16, 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 16, 2026
25	Curbell Plastics	Partial evidence	Orchard Park, NY, United StatesHQ checked Sep 16, 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 16, 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: engineering plastics 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 engineering plastics manufacturers.
Partial evidence: Its own public description names part of engineering plastics manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering plastics 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 915 engineering plastics manufacturers based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 11,669 reachable decision-makers.

Free signup · no credit card

View the full list →

Engineering plastics manufacturers based in the United States at a glance

As of Sep 16, 2026

32.2%Verified-email coverage

39.6Average contacts per company

11-50Median size (employees)

1.5%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

227

11-50

297

51-200

238

201-500

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 915 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 engineering plastics 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 “engineering plastics 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 engineering plastics 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 engineering plastics 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, 11,669 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 16, 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 engineering plastics 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 engineering plastics manufacturers are there based in the United States?

RevenueBase identified 915 engineering plastics 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?

Saint-Gobain Performance Plastics, headquartered in Solon, tops this list with the largest team on record.

Which city has the most engineering plastics manufacturers?

Houston leads with 14 headquartered companies, followed by Grand Rapids (8) and Elk Grove Village (6).

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 11,669 verified decision-maker contacts tracked across these 915 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 915 engineering plastics manufacturers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Engineering plastics manufacturers by geography

Browse the directory

Browse: Companies home · All United States lists · All Engineering plastics manufacturers lists · New lists

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.