# Top 30 manufacturers in Pittsburgh

Tamtam tracks 33 manufacturers headquartered in Pittsburgh. This list ranks the 30 largest by number of employees on LinkedIn, led by PPG, Wabtec Corporation and Viatris. Their median headcount is 809. Half of them were founded in 1964 or later.

The companies listed here are primarily large-scale manufacturers based in Pittsburgh, with a focus on industrial materials, transportation, and specialized components. Key players include PPG, which develops paints and coatings; Wabtec Corporation, a provider of equipment and services for rail and marine transport; Viatris, a global healthcare company specializing in pharmaceuticals; and Alcoa, a leader in bauxite, alumina, and aluminum products. Howmet Aerospace provides advanced engineered solutions for aerospace, while United States Steel Corporation focuses on steel solutions.

A notable pattern among these companies is their long-standing presence and significant workforce, indicating established industrial operations. Many were founded in the late 19th or early 20th century, such as Wabtec Corporation (1869), PPG (1883), and Alcoa (1888), highlighting a rich industrial heritage in the Pittsburgh area.

🇺🇸 Pittsburgh · 30 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 | [Wabtec Corporation](https://www.tamtam.ai/c/wabtec-corporation) (wabteccorp.com)<br>Provider of equipment, systems, digital solutions, and services for freight rail, transit, mining, industrial, and marine transportation sectors. | Railroad Equipment Manufacturing | 🇺🇸 Pittsburgh | 27,000 | 1869 |
| 3 | [Viatris](https://www.tamtam.ai/c/viatris) (viatris.com)<br>Global healthcare company providing extensive medicine portfolio and supply chain to deliver high-quality medicines addressing diverse health needs worldwide. | Pharmaceutical Manufacturing | 🇺🇸 Pittsburgh | 17,886 |  |
| 4 | [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 |
| 5 | [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 |
| 6 | [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 |
| 7 | [Kennametal](https://www.tamtam.ai/c/kennametal) (kennametal.com)<br>A global industrial technology leader specializing in advanced materials innovation, tooling, and wear-resistant solutions to enhance productivity for various industries | Machinery Manufacturing | 🇺🇸 Pittsburgh | 6,659 |  |
| 8 | [Excelitas Technologies Corp.](https://www.tamtam.ai/c/excelitas-technologies-corp) (excelitas.com)<br>Provider of advanced photonic technologies specializing in sensing, detection, imaging, optics, and specialty illumination for diverse global industries. | Manufacturing | 🇺🇸 Pittsburgh | 3,129 |  |
| 9 | [Matthews International](https://www.tamtam.ai/c/matthews-international) (matw.com)<br>Global provider of precision industrial technologies and memorialization products, serving industries and funeral homes with innovative, efficient solutions. | Manufacturing | 🇺🇸 Pittsburgh | 2,226 | 1850 |
| 10 | [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 |  |
| 11 | [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 |
| 12 | [TIMET](https://www.tamtam.ai/c/timet) (timet.com)<br>A leading producer of titanium melted and mill products for various industries worldwide, offering a wide range of high-quality titanium products | Mining | 🇺🇸 Pittsburgh | 1,028 | 1950 |
| 13 | [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 |
| 14 | [SMS group USA](https://www.tamtam.ai/c/sms-group-usa) (sms-group.com)<br>A leader in providing new equipment, maintenance, and spare parts services for metals producers in North America and globally | Machinery Manufacturing | 🇺🇸 Pittsburgh | 919 |  |
| 15 | [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 |
| 16 | [Aerotech, Inc.](https://www.tamtam.ai/c/aerotech-inc) (aerotech.com)<br>This company specializes in designing and manufacturing precision motion control systems for various industries and research institutions worldwide | Automation Machinery Manufacturing | 🇺🇸 Pittsburgh | 760 | 1970 |
| 17 | [Industrial Scientific](https://www.tamtam.ai/c/industrial-scientific) (indsci.com)<br>Innovative company designs gas detection products to protect workers globally, pioneering technologies for detecting and responding to hazardous conditions in real time | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Pittsburgh | 755 |  |
| 18 | [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 |
| 19 | [LB Foster](https://www.tamtam.ai/c/lb-foster) (lbfoster.com)<br>A leading provider of materials for transportation, construction, recreation, and agriculture projects, offering engineering, manufacturing, distribution, and service solutions globally | Transportation Equipment Manufacturing | 🇺🇸 Pittsburgh | 692 | 1902 |
| 20 | [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 |
| 21 | [Chromalox](https://www.tamtam.ai/c/chromalox) (chromalox.com)<br>Innovative developer of advanced thermal technologies for industrial heating applications worldwide, with a focus on exceeding specifications and reducing operating costs | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Pittsburgh | 682 | 1915 |
| 22 | [ZOLL Cardiac Management Solutions](https://www.tamtam.ai/c/zoll-cardiac-management-solutions) (cardiac.zoll.com)<br>Provider of innovative technologies improving insights and outcomes in various cardiac care paths, focusing on cardiac management solutions | Medical Equipment Manufacturing | 🇺🇸 Pittsburgh | 674 |  |
| 23 | [Westinghouse Electric Corporation](https://www.tamtam.ai/c/westinghouse-electric-corporation) (westinghouse.com)<br>Providing a wide range of dependable and innovative quality products and services aimed at improving everyday life for customers. | Manufacturing | 🇺🇸 Pittsburgh | 590 | 1886 |
| 24 | [Pittsburgh Glass Works](https://www.tamtam.ai/c/pittsburgh-glass-works) (vitro.com)<br>Global leader in OEM automotive glass manufacturing with 13 locations in US, Canada, and Poland, emphasizing innovation and growth through recent acquisitions and advancements | Motor Vehicle Parts Manufacturing | 🇺🇸 Pittsburgh | 513 | 2008 |
| 25 | [Forms+Surfaces](https://www.tamtam.ai/c/forms-surfaces) (forms-surfaces.com)<br>Design and manufacture of architectural surfaces, site furnishings, lighting, and elevator interiors for public spaces like airports, parks, and diverse commercial environments. | Manufacturing | 🇺🇸 Pittsburgh | 406 | 1964 |
| 26 | [Krystal Biotech, Inc.](https://www.tamtam.ai/c/krystal-biotech-inc) (krystalbio.com)<br>This company specializes in developing genetic medicines to address urgent medical needs, aiming to bring innovative solutions to patients | Biotechnology Research | 🇺🇸 Pittsburgh | 310 | 2016 |
| 27 | [Benshaw, Inc.](https://www.tamtam.ai/c/benshaw-inc) (benshaw.com)<br>A global leader in designing, developing, and manufacturing critical motor controls and drives for harsh environments since its establishment in 1983 | Industrial Machinery Manufacturing | 🇺🇸 Pittsburgh | 192 | 1983 |
| 28 | [Medrad](https://www.tamtam.ai/c/medrad) (medrad.com)<br>Developing high-performing products since 1964 for accurate patient diagnosis and quality care, supported by exceptional customer service worldwide | Medical Equipment Manufacturing | 🇺🇸 Pittsburgh | 185 | 1964 |
| 29 | [HICO America](https://www.tamtam.ai/c/hico-america) (hicoamerica.com)<br>Delivers energy infrastructure solutions, including transformers, STATCOM, GIS, and HVDC systems, for utilities, developers, and data centers across North America. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Pittsburgh | 183 | 1999 |
| 30 | [Red Valve Company](https://www.tamtam.ai/c/red-valve-company) (redvalve.com)<br>Global leader in innovative pinch and check valve products, elastomers, and engineered systems for tough flow control challenges in various industries | Industrial Machinery Manufacturing | 🇺🇸 Pittsburgh | 112 |  |

## 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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## The same list elsewhere in United States

- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,066)
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- [Manufacturers in New York State](https://www.tamtam.ai/l/manufacturers-new-york-state) (398)
- [Manufacturers in Pennsylvania](https://www.tamtam.ai/l/manufacturers-pennsylvania) (364)
- [Manufacturers in Wisconsin](https://www.tamtam.ai/l/manufacturers-wisconsin) (331)
- [Manufacturers in Georgia](https://www.tamtam.ai/l/manufacturers-georgia) (281)
- [Manufacturers in Florida](https://www.tamtam.ai/l/manufacturers-florida) (274)
- [Manufacturers in North Carolina](https://www.tamtam.ai/l/manufacturers-north-carolina) (271)
- [Manufacturers in Massachusetts](https://www.tamtam.ai/l/manufacturers-massachusetts) (269)
- [Manufacturers in Minnesota](https://www.tamtam.ai/l/manufacturers-minnesota) (262)
- [Manufacturers in New Jersey](https://www.tamtam.ai/l/manufacturers-new-jersey) (249)
- [Manufacturers in Indiana](https://www.tamtam.ai/l/manufacturers-indiana) (242)
- [Manufacturers in Alabama](https://www.tamtam.ai/l/manufacturers-alabama) (221)
- [Manufacturers in Washington State](https://www.tamtam.ai/l/manufacturers-washington-state) (176)
- [Manufacturers in Missouri](https://www.tamtam.ai/l/manufacturers-missouri) (162)
- [Manufacturers in Tennessee](https://www.tamtam.ai/l/manufacturers-tennessee) (156)
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- [Manufacturers in Connecticut](https://www.tamtam.ai/l/manufacturers-connecticut) (143)
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- [Manufacturers in New York](https://www.tamtam.ai/l/manufacturers-new-york) (141)

## The same list elsewhere

- [Manufacturers in the world](https://www.tamtam.ai/l/manufacturers-in-the-world) (39,579)
- [Manufacturers in North America](https://www.tamtam.ai/l/manufacturers-in-north-america) (10,136)

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Source: https://www.tamtam.ai/l/manufacturers-pittsburgh