Company lists · Data refreshed September 2026

Top 25 Engineering plastic manufacturers based in the United States

Name: Engineering plastic 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 477 companies tracked

RevenueBase identified 477 engineering plastic manufacturers headquartered in the United States as of September 2026 and tracks 28,578 professional contacts across them, including 9,065 with verified work emails. Houston is the largest hub.

This list covers engineering plastic 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

477Companies

28,578Contacts tracked

9,065Verified emails

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The 25 largest engineering plastic manufacturers based in the United States

Ranked by team size

Top 25 of 477 engineering plastic 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 plastic 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	Invista	Indirect evidence	Wichita, KS, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,775 contacts →
	Indirect evidence “At INVISTA, we make the chemicals, polymers, fabrics and fibers that can handle life’s toughest demands.” Source: RevenueBase Database · checked Sep 16, 2026
2	Ascend Performance Materials	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,038 contacts →
	Partial evidence “Headquartered in Houston, Texas, Ascend has nine global locations, including five fully integrated manufacturing facilities in the southeastern United States and an engineering…” Source: RevenueBase Database · checked Sep 16, 2026
3	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
4	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
5	Janicki	Partial evidence	Sedro-woolley, WA, United StatesHQ checked Sep 16, 2026	1,001-5,000	914 contacts →
	Partial evidence “Janicki is a privately-owned engineering and manufacturing company with locations in Washington and Utah.” 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	Piedmont Plastics	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	501-1,000	547 contacts →
	Partial evidence “Piedmont Plastics is a leading wholesale distributor of plastic sheet, rod, tube, and film, serving a wide range of industries across North America.” Source: RevenueBase Database · checked Sep 16, 2026
8	Polymershapes	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	501-1,000	540 contacts →
	Partial evidence “Polymershapes is an industry-leading distributor of plastic sheet, rod, tube, film, and associated products, with seven decades of industry-leading heritage.” 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	Laird Plastics	Partial evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	501-1,000	451 contacts →
	Partial evidence “Plastics have changed the world, enabling our society to enjoy the benefits of products that can be safer, lighter, stronger, cheaper and more practical than other materials.” Source: RevenueBase Database · checked Sep 16, 2026
13	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
14	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
15	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
16	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
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	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
21	Ravago Americas	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 16, 2026	10001+	283 contacts →
	Indirect evidence “Today, the Ravago group represents over metric tons of annual polymer sales serving more than active customers through 325+ locations across more than 60+ countries worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
22	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
23	Entec Polymers	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 16, 2026	201-500	271 contacts →
	Indirect evidence “For over thirty-five years, Entec has helped grow our customers’ businesses by forging strong, trust-driven partnerships.” Source: RevenueBase Database · checked Sep 16, 2026
24	Delrin	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 16, 2026	501-1,000	250 contacts →
	Partial evidence “Delrin®: Engineering the Future, Together For over 70 years, Delrin® has been the trusted choice for engineers who demand the highest standards of quality, reliability and…” Source: RevenueBase Database · checked Sep 16, 2026
25	Asahi Kasei Plastics North America, INC	Strong evidence	Fowlerville, MI, United StatesHQ checked Sep 16, 2026	201-500	240 contacts →
	Strong evidence “Asahi Kasei Plastics North America, Inc.(“APNA”) is a leading manufacturer of innovative, high-performance, engineered polymers and chemically coupled polypropylene resins in…” 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 plastic 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 plastic manufacturers.
Partial evidence: Its own public description names part of engineering plastic manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering plastic 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 477 engineering plastic manufacturers based in the United States

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Engineering plastic manufacturers based in the United States at a glance

As of Sep 16, 2026

31.7%Verified-email coverage

59.9Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

127

11-50

157

51-200

102

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 477 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 plastic 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 plastic 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 plastic 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 plastic 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, 9,065 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 plastic 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 plastic manufacturers are there based in the United States?

RevenueBase identified 477 engineering plastic 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?

Invista, headquartered in Wichita, tops this list with the largest team on record.

Which city has the most engineering plastic manufacturers?

Houston leads with 12 headquartered companies, followed by Charlotte (6) and Orlando (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 9,065 verified decision-maker contacts tracked across these 477 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.

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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.