These Indianapolis companies are mostly large manufacturing firms, with a strong presence in pharmaceuticals and agribusiness. Key players include Eli Lilly and Company, a pharmaceutical company discovering medicines; Corteva Agriscience, an agricultural company specializing in innovative solutions; and Elanco, a global animal health company. Allison Transmission designs and manufactures vehicle propulsion solutions.
A notable pattern among these companies is their long-standing presence, with many founded in the early to mid-20th century. For instance, Allison Transmission was founded in 1915, Herff Jones in 1920, and The Heritage Group in 1930. This suggests a mature industrial base in the city.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Eli Lilly and Companylilly.com
A pharmaceutical company dedicated to discovering medicines, improving disease management, and giving back to communities through philanthropy and volunteerism |
56,750 | |||
| 2 |
Corteva Agrisciencecorteva.com
An agricultural company specializing in innovative solutions, seed, crop protection, and digital products to enhance productivity for farmers and enrich lives throughout the food system |
23,468 | |||
| 3 |
Elancoelanco.com
A global animal health company providing innovative products and services for pets and farm animals, empowering customers to enhance animal well-being and advance society |
9,362 | |||
| 4 |
Dow AgroSciencescorteva.com
Agricultural technology company formerly known as Dow AgroSciences, now part of Corteva Agriscience Visit Corteva's website for updates |
3,352 | |||
| 5 |
Allison Transmissionallisontransmission.com
A global leader in designing and manufacturing vehicle propulsion solutions for commercial and defense vehicles, as well as electrified propulsion systems worldwide |
3,022 | |||
| 6 |
Beckman Coulter Life Sciencesbeckman.com
Develop laboratory instruments and solutions enhancing workflow efficiency, reliability, and innovation in liquid handling, genomics, and particle analysis. |
2,331 | |||
| 7 |
Delta Faucet Companydeltafaucetcompany.com
A leading manufacturer of residential and commercial faucets, focusing on innovation, collaboration, and employee development to create a positive culture |
1,961 | |||
| 8 |
Herff Jonesherffjones.com
The company specializes in providing prestigious symbols of achievement, from academic to athletic milestones, using high-quality materials and meticulous craftsmanship |
1,520 | |||
| 9 |
The Heritage Groupthgrp.com
A family-owned company with diverse businesses in construction, materials, environmental services, and chemicals, focusing on innovation, research, and sustainability |
1,422 | |||
| 10 |
Calumetcalumet.com
Manufacturing specialty ingredients for everyday products like lipstick, crayons, and jet fuel with a focus on agility and customer needs. |
1,265 | |||
| 11 |
dormakaba Americasdormakaba.com
The company focuses on providing safety, security, and sustainability to various communities through innovative solutions in different locations worldwide |
1,052 | |||
| 12 |
Closure Systems International (CSI)csiclosures.com
Global leader designing and manufacturing innovative closures for consumer and industrial markets, providing high-quality closures, capping equipment, technical services, and sustainable solutions |
925 | |||
| 13 |
Allison Off-Highway Drive & Motion Systemsdana.com
Mobile drivetrain and motion solutions for construction, agriculture, mining, forestry, and industrial equipment with conventional and electrified power sources. |
844 | |||
| 14 | 843 | ||||
| 15 |
Linde Advanced Material Technologieslinde-amt.com
Provider of protective coatings that improve product life, reduce cost, enhance performance, and mitigate risks, offering industry knowledge, technical expertise, and global resources |
803 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
MPPmppinnovation.com
Custom engineered components through powder metallurgy and metal injection molding for automotive, industrial, and medical applications using advanced materials and scalable manufacturing. |
518 | |||
| 17 |
Envigo ++++inotiv.com
Providing research models and related services to pharmaceutical, biotechnology, government, academia, and life science industries to support critical R&D projects |
488 | |||
| 18 |
Monument Chemicalmonumentchemical.com
The company provides high-quality chemicals, custom manufacturing, and process development services with a focus on safety, environmental performance, and customer collaboration |
463 | |||
| 19 |
Praxair Surface Technologieslinde-amt.com
Providing protective coatings and technical expertise to extend product life, reduce costs, improve performance, and mitigate risks across industries. |
415 | |||
| 20 |
Marian, Inc.marianinc.com
A global leader in custom precision die-cut components for industries like medical, electronics, automotive, and more, offering innovative solutions and exceptional service worldwide |
352 | |||
| 21 |
EMTemteasy.com
A trusted supplier of custom emblems and jewelry for the promotional products industry, with award-winning service and in-house design expertise Visit website for more information |
363 | |||
| 22 |
Peerless Pump Companypeerlesspump.com
Leading manufacturer of horizontal and vertical pumps for various industries, offering high-quality products, innovative solutions, and cloud-based fire pump monitoring system |
356 | |||
| 23 |
CountryMarkcountrymark.com
American-owned company in oil exploration, production, refining, and marketing Distributes premium fuels, lubricants, and DEF to farms, fleets, and families in the Midwest |
342 | |||
| 24 |
Vertellusvertellus.com
Global provider of specialty materials for various industries, offering innovative solutions that enhance quality of life, health, and value-added products |
329 | |||
| 25 |
Wood-Mizer LLCwoodmizer.com
A global leader in manufacturing portable sawmills and wood processing equipment for woodworking hobbyists and forestry professionals worldwide since 1982 |
306 | |||
| 26 |
Major Tool & Machinemajortool.com
A leading manufacturer offering world-class engineering, machining, and assembly services for various industries including aerospace, defense, power generation, and nuclear markets |
256 | |||
| 27 |
Specialty Coating Systems, Inc.scscoatings.com
Provides advanced coating solutions including Parylene, liquid, and plasma coatings for medical, aerospace, electronics, and automotive industries, alongside coating, curing, and testing systems. |
255 | |||
| 28 |
Global Plasticsglobal-plastics.com
A full-service plastic injection molding partner with in-house engineering, tool shop, and a wide range of presses serving automotive, medical, industrial, and food packaging industries |
228 | |||
| 29 |
Asphalt Materials, Inc.asphalt-materials.com
Formulation, manufacturing, and research of asphalt binders and emulsions supporting pavement preservation and construction services in the Midwest. |
196 | |||
| 30 |
Brulinbrulin.com
Specialty chemical manufacturer with 88 years of experience, providing solutions for precision parts and facilities cleaning to optimize processes and maximize efficiency |
124 | |||
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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 11, 2026.
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