# Top 38 chemical companies in Massachusetts

Tamtam tracks 38 chemical companies headquartered in Massachusetts. This list ranks all of them by number of employees on LinkedIn, led by Entegris, MKS Inc. and Cabot Corporation. Their median headcount is 303. Half of them were founded in 1970 or later. The most common headquarters are Boston (4), Worcester (3) and Andover (2).

The chemical companies in Massachusetts include large, established firms. Cabot Corporation, founded in 1882, specializes in performance materials, and Saint-Gobain Abrasives, established in 1885, provides abrasive solutions. A.W. Chesterton Company, from 1884, offers industrial solutions like fluid sealing systems, while MKS Inc., founded in 1961, focuses on technology solutions for semiconductor manufacturing. These companies often have a global presence.

A common thread among these companies is their focus on advanced materials and specialized industrial applications. Many, such as Entegris, are involved in semiconductor manufacturing, while others like Hollingsworth & Vose develop filtration and energy storage materials. There is a cluster of headquarters in Boston, with Cabot Corporation, Orbia, and Koura all located there.

🇺🇸 Massachusetts · 38 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Entegris](https://www.tamtam.ai/c/entegris) (entegris.com)<br>A global leader in advanced science-based solutions for technology challenges, driving innovation with artificial intelligence, augmented reality, and IoT technologies | Semiconductor Manufacturing | 🇺🇸 Billerica | 6,612 |  |
| 2 | [MKS Inc.](https://www.tamtam.ai/c/mks-inc) (mks.com)<br>provides technology solutions including instruments, systems, and specialty chemicals for semiconductor manufacturing, electronics, packaging, and specialty industrial applications | Semiconductor Manufacturing | 🇺🇸 Andover | 4,581 | 1961 |
| 3 | [Cabot Corporation](https://www.tamtam.ai/c/cabot-corporation) (cabotcorp.com)<br>Global specialty chemical and performance materials company providing solutions to address current challenges and future customer needs worldwide. | Chemical Manufacturing | 🇺🇸 Boston | 3,719 | 1882 |
| 4 | [Saint-Gobain Abrasives](https://www.tamtam.ai/c/saint-gobain-abrasives) (saint-gobain-surfacesolutions.com)<br>The company offers powerful and precise abrasives solutions for various markets, focusing on customization, performance, and safety with global presence | Industrial Machinery Manufacturing | 🇺🇸 Worcester | 3,196 | 1885 |
| 5 | [Orbia](https://www.tamtam.ai/c/orbia) (orbia.com)<br>A global company tackling challenges in water and food security, information access, connectivity, and energy transition across various sectors | Utilities | 🇺🇸 Boston | 1,300 |  |
| 6 | [A.W. Chesterton Company](https://www.tamtam.ai/c/a-w-chesterton-company) (chesterton.com)<br>A global provider of industrial solutions, specializing in fluid sealing systems, protective coatings, lubricants, and MRO chemicals with a focus on customer service and support | Mechanical Or Industrial Engineering | 🇺🇸 Groveland | 1,052 | 1884 |
| 7 | [Hollingsworth & Vose](https://www.tamtam.ai/c/hollingsworth-and-vose) (hollingsworth-vose.com)<br>Development and supply of advanced filtration and energy storage materials for diverse industries, enhancing health, sustainability, and efficiency worldwide. | Nanotechnology Research | 🇺🇸 Walpole | 975 |  |
| 8 | [Gradiant](https://www.tamtam.ai/c/gradiant) (gradiant.com)<br>Provides advanced water and wastewater treatment solutions for critical industries, reducing water usage, reclaiming resources, and renewing wastewater into freshwater. | Environmental Services | 🇺🇸 Woburn | 859 | 2013 |
| 9 | [Flexcon](https://www.tamtam.ai/c/flexcon) (flexcon.com)<br>A family-owned provider of innovative coatings, film laminations, and functional technologies, focused on creating sustainable solutions for a variety of markets globally | Plastics Manufacturing | 🇺🇸 Spencer | 695 | 1956 |
| 10 | [Koura](https://www.tamtam.ai/c/koura) (orbia-fem.com)<br>Development and manufacture of fluoroproducts for electric vehicles, energy storage, infrastructure, refrigeration, and low-GWP inhaler propellants worldwide. | Chemical Manufacturing | 🇺🇸 Boston | 482 |  |
| 11 | [Chase Corporation](https://www.tamtam.ai/c/chase-corporation) (chasecorp.com)<br>A leading manufacturer of protective materials for high reliability applications, offering industrial coatings, tapes, adhesives, and sealants globally under trusted brand names | Chemical Manufacturing | 🇺🇸 Westwood | 481 | 1946 |
| 12 | [Aspen Aerogels](https://www.tamtam.ai/c/aspen-aerogels) (aerogel.com)<br>A technology leader in sustainability, offering Aerogel solutions for global megatrends in resource efficiency, electrification, and sustainability across various industries | Manufacturing | 🇺🇸 Northborough | 455 | 2001 |
| 13 | [ICP Group](https://www.tamtam.ai/c/icp-group) (icpgroup.com)<br>Supplier of professional building envelope, cementitious, and sports surface products with extensive brand portfolios and specialized training programs. | Wholesale Building Materials | 🇺🇸 Andover | 390 | 2016 |
| 14 | [Shawmut Corporation](https://www.tamtam.ai/c/shawmut-corporation) (shawmutcorporation.com)<br>A leading provider of engineered flexible multi-layer materials for automotive, medical, and other industries, with a focus on innovation and global expansion | Textile Manufacturing | 🇺🇸 West Bridgewater | 380 | 1916 |
| 15 | [Caplugs](https://www.tamtam.ai/c/caplugs) (caplugs.com)<br>A global leader in custom molded components, masking solutions, and product protection with extensive manufacturing capabilities and a team of experts | Plastics and Rubber Product Manufacturing | 🇺🇸 Burlington | 357 | 1948 |
| 16 | [Web Industries](https://www.tamtam.ai/c/web-industries) (webindustries.com)<br>Precision converting and outsource manufacturing services for aerospace, energy, wire, commercial, consumer, and medical markets with flexible material solutions. | Manufacturing | 🇺🇸 Marlborough | 337 | 1969 |
| 17 | [Alphagary, an Orbia business](https://www.tamtam.ai/c/alphagary-an-orbia-business) (alphagary.com)<br>A global leader in specialty polymer compounds and additives, offering sustainable solutions for various industries worldwide through innovative formulations and global distribution | Plastics Manufacturing | 🇺🇸 Boston | 331 | 1961 |
| 18 | [OrthoLite](https://www.tamtam.ai/c/ortholite) (ortholite.com)<br>A global leader in foam technology, creating innovative insoles for top footwear brands with a focus on comfort, performance, and sustainability | Manufacturing | 🇺🇸 Amherst | 326 | 1997 |
| 19 | [Cambridge Isotope Laboratories, Inc](https://www.tamtam.ai/c/cambridge-isotope-laboratories-inc) (isotope.com)<br>Global leader in stable isotope separation and labeling for biochemical compounds, contributing to medical, research, and diagnostic advancements worldwide | Chemical Manufacturing | 🇺🇸 Tewksbury | 303 | 1981 |
| 20 | [Bemis Associates](https://www.tamtam.ai/c/bemis-associates) (bemisworldwide.com)<br>Bemis partners with leading brands to design and construct innovative, high-performance products, focusing on collaboration, creativity, and commitment to employees | Plastics Manufacturing | 🇺🇸 Shirley | 284 | 1910 |
| 21 | [Saint-Gobain Research North America](https://www.tamtam.ai/c/saint-gobain-research-north-america) (sgr-northamerica.saint-gobain.com)<br>Innovative research lab developing ceramic and polymer solutions for energy efficiency, resource conservation, and various industries through advanced manufacturing processes | Research Services | 🇺🇸 Northborough | 187 | 1985 |
| 22 | [GreenLight Biosciences](https://www.tamtam.ai/c/greenlight-biosciences) (greenlightbiosciences.com)<br>Develop and commercialize environmentally friendly, easy-to-use crop protection solutions leveraging natural methods to support sustainable farming practices. | Biotechnology Research | 🇺🇸 Medford | 182 | 2008 |
| 23 | [6K](https://www.tamtam.ai/c/6k) (6kinc.com)<br>Developing advanced materials through microwave plasma technology for additive manufacturing and battery storage, providing more sustainable, cost-effective solutions compared to traditional methods | Chemical Manufacturing | 🇺🇸 North Andover | 157 | 2014 |
| 24 | [NEPTCO](https://www.tamtam.ai/c/neptco) (chasecorp.com)<br>Global leader in engineering and manufacturing materials for commercial, industrial, and military applications, specializing in laminates, adhesives, and polymeric coatings for cables and electronics | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Westwood | 99 | 1953 |
| 25 | [Saint-Gobain Ceramics - SGP](https://www.tamtam.ai/c/saint-gobain-ceramics-sgp) (linkedin.com)<br>The company designs and manufactures advanced ceramic materials for various industries worldwide, offering tailored solutions to meet tough application requirements | Glass, Ceramics and Concrete Manufacturing | 🇺🇸 Worcester | 82 |  |
| 26 | [Universal Plastics Corporation](https://www.tamtam.ai/c/universal-plastics-corporation) (universalplastics.com)<br>Custom plastic products manufacturer offering expertise in thermoforming, injection molding, and blow molding for various industries, with a focus on high quality and innovative solutions | Plastics Manufacturing | 🇺🇸 Holyoke | 73 | 1949 |
| 27 | [G&F Precision Molding, Inc.](https://www.tamtam.ai/c/g-and-f-precision-molding-inc) (gandfprecision.com)<br>Privately held custom injection molder offering thermoplastic and liquid silicone rubber molding, design, prototyping, mold making, and value add operations ISO certified for quality | Plastics Manufacturing | 🇺🇸 Fiskdale | 65 | 1963 |
| 28 | [Evolved By Nature](https://www.tamtam.ai/c/evolved-by-nature) (biotech.evolvedbynature.com)<br>Biotech company creating sustainable molecules with Activated Silk™ technology to improve product performance and environmental impact in various industries | Biotechnology Research | 🇺🇸 Needham Heights | 60 | 2013 |
| 29 | [Fosta-Tek Optics, Inc.](https://www.tamtam.ai/c/fosta-tek-optics-inc) (fosta-tek.com)<br>A leading US-based manufacturer of high-quality polymer components for optics and lenses, serving various industries with advanced coating and testing capabilities | Plastics Manufacturing | 🇺🇸 Leominster | 38 | 1991 |
| 30 | [Pittsfield Plastics Engineering, LLC](https://www.tamtam.ai/c/pittsfield-plastics-engineering-llc) (pittsplas.com)<br>Industry-leading injection molder and mold maker offering plastic spools, reels, cores, bobbins for packaging various products in a fully equipped manufacturing facility | Plastics Manufacturing | 🇺🇸 Pittsfield | 38 | 1968 |
| 31 | [Barbour Plastics, Inc.](https://www.tamtam.ai/c/barbour-plastics-inc) (barbourplastics.com)<br>Specializing in extruding premium thermoplastic profiles for various applications, with diverse equipment to process small to large profiles efficiently Delivering unmatched service and quality | Plastics Manufacturing | 🇺🇸 Brockton | 29 | 1970 |
| 32 | [Foundation Alloy](https://www.tamtam.ai/c/foundation-alloy) (foundationalloy.com)<br>This company specializes in transforming the metal parts manufacturing industry through advanced technology, offering superior mechanical properties and scalable manufacturing solutions | Manufacturing | 🇺🇸 Cambridge | 19 |  |
| 33 | [Ionic Materials, Inc](https://www.tamtam.ai/c/ionic-materials-inc) (ionicmaterials.com)<br>Innovative polymer technology company creating customized solutions for energy storage, healthcare, and 5G applications to enable a better and safer world | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Woburn | 14 | 2012 |
| 34 | [GXT Green, Inc](https://www.tamtam.ai/c/gxt-green-inc) (gxtgreen.com)<br>A company that helps packaging and plastics industries reduce their environmental impact by providing sustainable, recyclable materials for various products | Plastics Manufacturing | 🇺🇸 Billerica | 10 | 2010 |
| 35 | [INDUSTRIAL POLYMERS & CHEMICALS, INC.](https://www.tamtam.ai/c/industrial-polymers-and-chemicals-inc) (industrial-polymers.com)<br>Supplier of fiberglass reinforcements to the Abrasives Industry, offering cutting, coating, and kitting services for various materials Specializes in resin marketing and specialty sewing/assembly | Plastics Manufacturing | 🇺🇸 Shrewsbury | 10 | 1959 |
| 36 | [Multiscale Systems](https://www.tamtam.ai/c/multiscale-systems) (multiscalesystems.com)<br>Innovative industrial solutions utilizing high-performance materials and advanced manufacturing techniques | Engineering Services | 🇺🇸 Worcester | 5 | 2018 |
| 37 | [AtoMe Inc](https://www.tamtam.ai/c/atome-inc)<br>Innovative startup leveraging 3D printing and machine learning to design enhanced materials for energy, transportation, aviation, and aerospace industries | Manufacturing | 🇺🇸 Ipswich | 3 | 2023 |
| 38 | [GS Rubber Industries LLC](https://www.tamtam.ai/c/gs-rubber-industries-llc) (gsrind.com)<br>Manufacturer of standard & custom molded rubber products, including seals, gaskets, pet toys, and more Services include prototyping, compounding, molding, and engineering support | Mechanical Or Industrial Engineering | 🇺🇸 Fall River | 3 | 1994 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

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Source: https://www.tamtam.ai/l/chemical-companies-massachusetts