# Top 50 chemical companies in Pennsylvania

Tamtam tracks 95 chemical companies headquartered in Pennsylvania. This list ranks the 50 largest by number of employees on LinkedIn, led by PPG, Air Products and Alcoa. Their median headcount is 1,228. Half of them were founded in 1965 or later. The most common headquarters are Pittsburgh (11), Philadelphia (5) and Conshohocken (2).

This selection of large companies in Pennsylvania primarily features established players in chemical manufacturing and related industrial sectors. Companies like PPG, founded in 1883, specialize in paints and coatings, while Air Products, established in 1940, supplies industrial gases. FMC Corporation, also founded in 1883, focuses on agricultural chemicals, and Airgas, founded in 1982, distributes industrial and specialty gases. Other significant firms include Axalta, a global provider of performance coatings, and Howmet Aerospace, specializing in advanced engineered solutions for aerospace.

A notable pattern among these companies is their long-standing presence, with many founded in the late 19th or early 20th century, indicating a mature industrial base. Pittsburgh emerges as a significant hub, hosting the headquarters of several large corporations, including PPG, Alcoa, Howmet Aerospace, and United States Steel Corporation. This concentration points to a historical strength in heavy industry within the region.

🇺🇸 Pennsylvania · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [PPG](https://www.tamtam.ai/c/ppg) (ppg.com)<br>Development and delivery of paints, coatings, and specialty materials serving construction, consumer products, industrial, transportation, and aftermarket markets worldwide. | Paint, Coating, and Adhesive Manufacturing | 🇺🇸 Pittsburgh | 33,277 | 1883 |
| 2 | [Air Products](https://www.tamtam.ai/c/air-products) (airproducts.com)<br>Supplier of industrial gases serving over 250,000 customers in more than 50 countries worldwide with diverse applications. | Chemical Manufacturing | 🇺🇸 Allentown | 20,000 | 1940 |
| 3 | [Alcoa](https://www.tamtam.ai/c/alcoa) (alcoa.com)<br>Global industry leader in bauxite, alumina, and aluminum products, focused on reinventing the aluminum industry for a sustainable future through innovation and best practices | Mining | 🇺🇸 Pittsburgh | 17,780 | 1888 |
| 4 | [FMC Corporation](https://www.tamtam.ai/c/fmc-corporation) (fmc.com)<br>The company is dedicated to innovating sustainable technologies to protect crops, support farmers, and tackle agriculture's challenges using science | Agricultural Chemical Manufacturing | 🇺🇸 Philadelphia | 11,986 | 1883 |
| 5 | [Airgas](https://www.tamtam.ai/c/airgas) (airgas.com)<br>A leading supplier of industrial, medical, and specialty gases, safety products, ammonia, and process chemicals, committed to improving customer performance | Chemical Manufacturing | 🇺🇸 Radnor | 10,444 | 1982 |
| 6 | [Axalta](https://www.tamtam.ai/c/axalta) (axalta.com)<br>A global provider of performance coatings for industrial, automotive, and refinish applications, focused on innovation for a sustainable future | Chemical Manufacturing | 🇺🇸 Philadelphia | 7,744 | 2013 |
| 7 | [Howmet Aerospace](https://www.tamtam.ai/c/howmet-aerospace) (howmet.com)<br>A global provider of advanced engineered solutions for aerospace and transportation industries, specializing in jet engine components, aerospace fastening systems, and titanium structural parts | Aviation and Aerospace Component Manufacturing | 🇺🇸 Pittsburgh | 7,402 | 2020 |
| 8 | [Coherent Corp.](https://www.tamtam.ai/c/coherent-corp) (coherent.com)<br>Development and delivery of breakthrough technologies and innovations for industrial, communications, electronics, and instrumentation market applications worldwide. | Semiconductor Manufacturing | 🇺🇸 Saxonburg | 7,389 | 1971 |
| 9 | [United States Steel Corporation](https://www.tamtam.ai/c/united-states-steel-corporation) (ussteel.com)<br>Developing and delivering profitable, next-generation steel solutions focused on safety and meeting current and future customer needs. | Manufacturing | 🇺🇸 Pittsburgh | 6,794 | 1901 |
| 10 | [Saint-Gobain North America](https://www.tamtam.ai/c/saint-gobain-north-america) (saint-gobain-northamerica.com)<br>A global leader in sustainable construction materials and services, dedicated to enhancing buildings' efficiency and reducing carbon emissions by 2050 | Wholesale Building Materials | 🇺🇸 Malvern | 5,971 | 1665 |
| 11 | [Arconic](https://www.tamtam.ai/c/arconic) (arconic.com)<br>A leading provider of aluminum products for automotive, aerospace, transportation, industrial, packaging, and construction markets, committed to innovation and advancement | Manufacturing | 🇺🇸 Pittsburgh | 4,672 | 2016 |
| 12 | [SUEZ - Water Technologies & Solutions](https://www.tamtam.ai/c/suez-water-technologies-and-solutions) (watertechnologies.com)<br>Providing innovative solutions for industries, including water treatment and process optimization, to help businesses thrive and overcome challenges | Environmental Services | 🇺🇸 Trevose | 4,538 |  |
| 13 | [Graham Packaging](https://www.tamtam.ai/c/graham-packaging) (grahampackaging.com)<br>A leader in sustainable packaging design, manufacturing, and sales for food, beverage, household, and automotive industries with global reach | Packaging and Containers Manufacturing | 🇺🇸 Lancaster | 3,562 | 1970 |
| 14 | [Quaker Houghton](https://www.tamtam.ai/c/quaker-houghton) (home.quakerhoughton.com)<br>Global leader in industrial process fluids, serving advanced manufacturing industries with expertise in chemistry and engineering for efficient operations and future growth | Chemical Manufacturing | 🇺🇸 Conshohocken | 3,523 |  |
| 15 | [Carpenter Technology Corporation](https://www.tamtam.ai/c/carpenter-technology-corporation) (carpentertechnology.com)<br>Producer and distributor of premium specialty alloys and advanced materials for aerospace, transportation, medical, energy, and additive manufacturing applications. | Manufacturing | 🇺🇸 Philadelphia | 3,271 | 1889 |
| 16 | [Armstrong World Industries](https://www.tamtam.ai/c/armstrong-world-industries) (armstrongceilings.com)<br>Design and manufacture innovative ceiling and wall systems enhancing aesthetics, acoustics, well-being, and sustainability in various interior spaces. | Wholesale Building Materials | 🇺🇸 Lancaster | 3,186 | 1860 |
| 17 | [TekniPlex](https://www.tamtam.ai/c/tekniplex) (tekni-plex.com)<br>Global leader in healthcare and consumer product markets, providing innovative solutions through materials science and manufacturing technologies for a healthier, sustainable world | Packaging and Containers Manufacturing | 🇺🇸 Wayne | 2,042 | 1967 |
| 18 | [Trinseo](https://www.tamtam.ai/c/trinseo) (trinseo.com)<br>A specialty material solutions provider partnering with companies to innovate and create sustainable products across various industries worldwide | Chemical Manufacturing | 🇺🇸 Wayne | 2,009 |  |
| 19 | [Industrial Coatings](https://www.tamtam.ai/c/industrial-coatings) (ppg.com)<br>Global provider of advanced coatings, paints, and specialty materials focused on protecting and enhancing industrial products and landmarks. | Wholesale Building Materials | 🇺🇸 Pittsburgh | 1,830 |  |
| 20 | [FXI](https://www.tamtam.ai/c/fxi) (fxi.com)<br>A leading producer of innovation for various markets, creating products for home, healthcare, electronics, personal care, transportation, and industrial applications | Manufacturing | 🇺🇸 Radnor | 1,408 |  |
| 21 | [Carlisle Construction Materials](https://www.tamtam.ai/c/carlisle-construction-materials) (carlisleconstructionmaterials.com)<br>Manufacturer and supplier of roofing, insulation, waterproofing, and construction products for commercial and residential building markets. | Wholesale Building Materials | 🇺🇸 Carlisle | 1,382 | 1917 |
| 22 | [The Pittsburgh Paints Company](https://www.tamtam.ai/c/the-pittsburgh-paints-company) (pittsburghpaintsco.com)<br>Manufactures and sells interior and exterior paints, stains, adhesives, sealants, and repair products for consumers and professionals. | Paint, Coating, and Adhesive Manufacturing | 🇺🇸 Cranberry Township | 1,293 | 2024 |
| 23 | [Aquatech](https://www.tamtam.ai/c/aquatech) (aquatech.com)<br>Global leader in water technology, specializing in desalination, water reuse, and zero liquid discharge solutions to reduce water and carbon footprint worldwide | Environmental Services | 🇺🇸 Canonsburg | 1,270 | 1981 |
| 24 | [Greene Tweed](https://www.tamtam.ai/c/greene-tweed) (gtweed.com)<br>Global manufacturer of high-performance thermoplastics, composites, seals, and engineered components for industries like semiconductor, oil & gas, aerospace, defense, and pharmaceutical processing | Manufacturing | 🇺🇸 Lansdale | 1,238 | 1863 |
| 25 | [Colorcon](https://www.tamtam.ai/c/colorcon) (colorcon.com)<br>Develops, supplies, and supports formulated film coating systems, modified release technologies, core excipients, and functional packaging for the pharmaceutical industry. | Pharmaceutical Manufacturing | 🇺🇸 Harleysville | 1,228 | 1961 |
| 26 | [PQ Corporation](https://www.tamtam.ai/c/pq-corporation) (pq.com)<br>A global provider of silicates, silicas, and derivative products for environmental improvements, consumer products, and personal safety, prioritizing sustainability | Chemical Manufacturing | 🇺🇸 Valley Forge | 1,169 | 1815 |
| 27 | [Koppers Inc.](https://www.tamtam.ai/c/koppers-inc) (koppers.com)<br>A global wood preservation technology company creating environmentally responsible solutions for various industries, with a focus on safety and sustainability | Chemical Manufacturing | 🇺🇸 Pittsburgh | 1,080 | 1988 |
| 28 | [Harsco Metals & Minerals](https://www.tamtam.ai/c/harsco-metals-and-minerals) (harsco-environmental.com)<br>Harsco Metals & Minerals is now Harsco Environmental, focusing on sustainable solutions for waste management and resource recovery Visit their LinkedIn page | Environmental Services | 🇺🇸 Camp Hill | 1,020 |  |
| 29 | [Liberty Tire Recycling, LLC](https://www.tamtam.ai/c/liberty-tire-recycling-llc) (libertytire.com)<br>Reclaims over four billion pounds of scrap tires annually, transforming waste into sustainable products through a network of North American processing facilities. | Renewable Energy Semiconductor Manufacturing | 🇺🇸 Pittsburgh | 927 | 2000 |
| 30 | [HarbisonWalker International](https://www.tamtam.ai/c/harbisonwalker-international) (thinkhwi.com)<br>A global leader in refractory products delivering solutions to industries worldwide with over 150 years of excellence in performance and value | Glass, Ceramics and Concrete Manufacturing | 🇺🇸 Pittsburgh | 809 | 2000 |
| 31 | [Calgon Carbon Corporation](https://www.tamtam.ai/c/calgon-carbon-corporation) (calgoncarbon.com)<br>Activated carbon products for water, air, and environmental purification across more than 700 applications, leveraging over 80 years expertise. | Environmental Services | 🇺🇸 Moon Township | 783 | 1942 |
| 32 | [Brentwood Industries, Inc.](https://www.tamtam.ai/c/brentwood-industries-inc) (brentwoodindustries.com)<br>A leading provider of thermoformed plastic solutions for consumer, manufacturing, and environmental industries, specializing in custom products and innovative strategies | Plastics Manufacturing | 🇺🇸 Reading | 733 | 1965 |
| 33 | [AgroFresh](https://www.tamtam.ai/c/agrofresh) (agrofresh.com)<br>AgroFresh empowers fresh produce businesses with science-based solutions to enhance quality, extend shelf life, prevent food waste, and preserve resources | Biotechnology Research | 🇺🇸 Philadelphia | 726 | 1996 |
| 34 | [JENNMAR](https://www.tamtam.ai/c/jennmar) (jennmar.com)<br>Global leader in ground control technology for mining, tunneling, and civil construction industries, offering a wide range of quality products and services worldwide | Mining | 🇺🇸 Pittsburgh | 724 | 1972 |
| 35 | [Buzzi Unicem USA](https://www.tamtam.ai/c/buzzi-unicem-usa) (buzziunicemusa.com)<br>A leading US cement manufacturer with 8 plants and 35 terminals, supplying cement to over 3,800 companies across 20 states | Mining | 🇺🇸 Bethlehem | 709 |  |
| 36 | [Carmeuse Americas](https://www.tamtam.ai/c/carmeuse-americas) (carmeuse.com)<br>A leading manufacturer of lime and limestone products offering integrated services to optimize processes and provide solutions across various industries | Mining & Metals | 🇺🇸 Pittsburgh | 687 | 1860 |
| 37 | [Comar](https://www.tamtam.ai/c/comar) (comar.com)<br>Provides industry-leading plastic packaging solutions for various markets, from beauty to healthcare, leveraging advanced technologies and integrated manufacturing processes for product commercialization. | Plastics Manufacturing | 🇺🇸 Voorhees | 614 | 1949 |
| 38 | [Quaker Chemical Corporation](https://www.tamtam.ai/c/quaker-chemical-corporation) (home.quakerhoughton.com)<br>Global leader in industrial process fluids, serving steel, aluminum, automotive, aerospace, mining, and metalworking industries with a focus on efficiency and effectiveness | Chemical Manufacturing | 🇺🇸 Conshohocken | 606 |  |
| 39 | [Vitro Architectural Glass](https://www.tamtam.ai/c/vitro-architectural-glass) (vitroglazings.com)<br>A leading glass manufacturer in the Americas, specializing in residential and commercial construction markets, producing industry-leading glass brands | Glass, Ceramics and Concrete Manufacturing | 🇺🇸 Cheswick | 522 | 2016 |
| 40 | [CRC Industries](https://www.tamtam.ai/c/crc-industries) (crcindustries.com)<br>Production of specialty chemical products and formulations for maintenance, repair, and operations across automotive, industrial, electrical, marine, and aviation sectors worldwide. | Chemical Manufacturing | 🇺🇸 Horsham | 509 |  |
| 41 | [The Plastek Group](https://www.tamtam.ai/c/the-plastek-group) (plastekgroup.com)<br>A world-class manufacturer specializing in plastics packaging for various industries, providing services from design and development to molding, assembly, and decorating | Plastics Manufacturing | 🇺🇸 Erie | 505 | 1956 |
| 42 | [Houghton International](https://www.tamtam.ai/c/houghton-international) (home.quakerhoughton.com)<br>Global leader in industrial process fluids serving steel, aluminum, automotive, aerospace, and metalworking industries with technical and business expertise. | Chemical Manufacturing | 🇺🇸 Norristown | 502 | 1865 |
| 43 | [Fenner Precision Polymers](https://www.tamtam.ai/c/fenner-precision-polymers) (fenner.com)<br>Supplier of engineered polymer products and solutions for diverse industries including aerospace, manufacturing, agriculture, and 3D printing applications worldwide. | Automation Machinery Manufacturing | 🇺🇸 Lititz | 501 |  |
| 44 | [Henry, a Carlisle Company](https://www.tamtam.ai/c/henry-a-carlisle-company) (henry.com)<br>North American leader managing water, vapor, air, and energy flow from foundation to roof, enhancing energy efficiency and sustainability for buildings. | Wholesale Building Materials | 🇺🇸 Kimberton | 486 | 1933 |
| 45 | [NLMK USA](https://www.tamtam.ai/c/nlmk-usa) (us.nlmk.com)<br>Leading producer of high-quality steel coils for construction, automotive, and heavy equipment industries in the US, offering specialty products and customized solutions | Mining | 🇺🇸 Farrell | 438 |  |
| 46 | [Penn Color, Inc.](https://www.tamtam.ai/c/penn-color-inc) (penncolor.com)<br>Global developer and manufacturer of color concentrates, masterbatches, additives, and pigment dispersions for various industries with a focus on innovation and customer satisfaction | Plastics Manufacturing | 🇺🇸 Hatfield | 401 | 1964 |
| 47 | [Restek Corporation](https://www.tamtam.ai/c/restek-corporation) (restek.com)<br>Design and manufacture chromatography columns, sample preparation tools, standards, and accessories for environmental, food, pharmaceutical, and clinical industries. | Chemical Manufacturing | 🇺🇸 Bellefonte | 383 | 1985 |
| 48 | [Tastepoint by IFF](https://www.tamtam.ai/c/tastepoint-by-iff) (tastepoint.com)<br>Tastepoint blends passion and technology to provide innovative taste solutions, creating delightful experiences for customers and consumers | Food and Beverage Services | 🇺🇸 Philadelphia | 375 | 2017 |
| 49 | [Solesis](https://www.tamtam.ai/c/solesis) (solesis.com)<br>A market leader in biomaterials for life sciences, developing critical components for medical devices and single-use technologies Operates through four subsidiaries | Biotechnology Research | 🇺🇸 Telford | 361 |  |
| 50 | [VEKA - North America](https://www.tamtam.ai/c/veka-north-america) (vekainc.com)<br>A global leader in PVC/vinyl extrusion for windows, doors, fences, decks, and railings, offering technologically advanced materials for residential and commercial building applications | Wholesale Building Materials | 🇺🇸 Fombell | 355 | 1967 |

## 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-pennsylvania