Company lists · Data refreshed September 2026
Top 25 Glass fiber reinforced plastic manufacturers based in the United States
RevenueBase identified 304 glass fiber reinforced plastic manufacturers headquartered in the United States as of September 2026 and tracks 5,987 professional contacts across them, including 1,695 with verified work emails. Houston is the largest hub.
This list covers glass fiber reinforced 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.
The 25 largest glass fiber reinforced plastic manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 437 contacts → | ||||
Indirect evidence “MFG's composites expertise is a result of 70 years of service to customers in many industries.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 215 contacts → | ||||
Strong evidence “Strongwell is the world's leading pultruder of fiber reinforced (FRP) structural components.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 195 contacts → | ||||
Strong evidence “With six decades of experience in the Fiberglass Reinforced Plastics industry, Fibergrate Composite Structures manufactures and sells the most complete line of high-performance…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 137 contacts → | ||||
Partial evidence “Over 75 Years of Excellence Federal Foam Technologies is a custom fabricator of flexible cellular and plastic materials, with capabilities in engineering and research and…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 135 contacts → | ||||
Indirect evidence “North American Composites (NAC) distributes materials and equipment from leading suppliers to the marine and composites industry.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 115 contacts → | ||||
Strong evidence “McCLARIN Composites has been a premier supplier of large Thermoplastic and Fiberglass Reinforced Plastic components since 1953.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 105 contacts → | ||||
Partial evidence “Enduro Composites is a vertically integrated manufacturer of FRP composites.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 93 contacts → | ||||
Partial evidence “MasterMold, LLC is a multi-site, Wisconsin based manufacturer.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 85 contacts → | ||||
Partial evidence “Based in Central Ohio, Ridge Corporation is an engineering based, solutions-oriented manufacturer and marketer of advanced composites, specializing in next generation resilient…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 85 contacts → | ||||
Indirect evidence “PLENCO is a materials company advancing the systems that power industry.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 84 contacts → | ||||
Partial evidence “Jushi Group, headquartered in the Tongxiang Economic Development Zone, Zhejiang, China, is one of the world’s largest producers of fiberglass reinforcements.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 66 contacts → | ||||
Indirect evidence “Spaulding Composites is a global supplier of specialty composite materials and value added fabricated products.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 66 contacts → | ||||
Indirect evidence “ENGINEERING With the start of every project, Ershigs develops a comprehensive plan, including: project assessment, process engineering, systems engineering, design, analysis, and…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 63 contacts → | ||||
Indirect evidence “Life Critical.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 62 contacts → | ||||
Indirect evidence “We provide a smart alternative to wood, steel and aluminum.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 61 contacts → | ||||
Indirect evidence “Fiberglass Coatings carries a complete line of polyester resin, epoxy resin gelcoats and fiberglass materials.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 55 contacts → | ||||
Partial evidence “US Liner Company is a leading manufacturer of advanced thermoplastic composite solutions for a broad range of applications in new and diverse markets.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 51 contacts → | ||||
Strong evidence “Haysite Reinforced Plastics, located in Erie, PA, is among the worldwide leaders in the formulation and processing of thermoset composite materials.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 46 contacts → | ||||
Indirect evidence “Advantic Building Group organizes people and technology to reshape how the world builds.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 45 contacts → | ||||
Partial evidence “Aurora Technologies, Inc.(ATI) is North America's largest fabricator, distributor and manufacturer of thermosets, thermoplastics and other non-metallic materials.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 42 contacts → | ||||
Partial evidence “Atlas Fibre is a manufacturer/master distributor of thermoset sheet, rod, and tube.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 42 contacts → | ||||
Strong evidence “Manufacturer & fabricator of industrial high-pressure laminates, custom pultrusions, ballistics grades panels, glass polyesters, & other custom materials.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 41 contacts → | ||||
Indirect evidence “Revchem Composites is committed to increasing the productivity and profitability of composite fabricators.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 41 contacts → | ||||
Partial evidence “Janco Engineered Products manufactures a wide range of advanced composites.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
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: glass fiber reinforced 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 glass fiber reinforced plastic manufacturers.
- Partial evidence
- Its own public description names part of glass fiber reinforced plastic manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name glass fiber reinforced 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 304 glass fiber reinforced plastic manufacturers based in the United States
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Glass fiber reinforced plastic manufacturers based in the United States at a glance
As of Sep 16, 2026Companies by employee count
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 304 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 glass fiber reinforced 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 “glass fiber reinforced 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 glass fiber reinforced 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 glass fiber reinforced 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, 1,695 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 glass fiber reinforced 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 glass fiber reinforced plastic manufacturers are there based in the United States?
RevenueBase identified 304 glass fiber reinforced 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?
Core Molding Technologies, headquartered in Columbus, tops this list with the largest team on record.
Which city has the most glass fiber reinforced plastic manufacturers?
Houston leads with 6 headquartered companies, followed by Ontario (5) and Ashtabula (3).
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 1,695 verified decision-maker contacts tracked across these 304 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.
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