# The 28 largest agriculture companies in Illinois

Tamtam tracks 28 agriculture companies headquartered in Illinois. This list ranks all of them by number of employees on LinkedIn, led by John Deere, ADM and CF Industries. Their median headcount is 395. Half of them were founded in 1946 or later. The most common headquarters are Chicago (3).

This list features a concentration of well-established, large-scale companies in the agriculture sector across Illinois. Noteworthy firms include John Deere, a global leader in agricultural machinery, and ADM, a global nutrition company focused on plant-based solutions. CF Industries specializes in clean energy products, while Prairie Farms Dairy, Inc. is a prominent dairy cooperative. GROWMARK, Inc. provides comprehensive agricultural cooperative services.

The companies represent a diverse mix of agricultural sub-sectors, ranging from machinery manufacturing and food processing to chemical production and farming inputs. A common pattern observed is the prevalence of long-standing enterprises, with many founded in the early to mid-20th century, indicating a mature and established agricultural industry in the state.

🇺🇸 Illinois · 28 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [John Deere](https://www.tamtam.ai/c/john-deere) (deere.com)<br>A global leader in cutting-edge products and technology for agriculture and construction, pushing boundaries for productivity and sustainability worldwide | Machinery Manufacturing | 🇺🇸 Moline | 55,618 | 1837 |
| 2 | [ADM](https://www.tamtam.ai/c/adm) (adm.com)<br>Global nutrition company transforming industries with plant-based solutions, sustainable practices, and cutting-edge innovations for a healthier, more environmentally friendly future | Food and Beverage Manufacturing | 🇺🇸 Chicago | 42,789 | 1902 |
| 3 | [CF Industries](https://www.tamtam.ai/c/cf-industries) (cfindustries.com)<br>Manufacturing and distributing clean energy products with efficient, cost-advantaged facilities and extensive storage and transportation networks across North America and the UK. | Chemical Manufacturing | 🇺🇸 Northbrook | 2,736 | 1946 |
| 4 | [Prairie Farms Dairy, Inc.](https://www.tamtam.ai/c/prairie-farms-dairy-inc) (prairiefarms.com)<br>Midwest and South-based dairy cooperative with over 600 farm families producing award-winning milk, cheese, and dairy products sold nationwide Nourishing communities responsibly | Dairy Product Manufacturing | 🇺🇸 Edwardsville | 1,325 | 1938 |
| 5 | [GROWMARK, Inc.](https://www.tamtam.ai/c/growmark-inc) (jobs.growmark.com)<br>Agricultural cooperative providing agronomy, energy, facility engineering, construction, logistics, and grain marketing management services across North America. | Farming | 🇺🇸 Normal | 1,209 | 1927 |
| 6 | [Titan International, Inc.](https://www.tamtam.ai/c/titan-international-inc) (titan-intl.com)<br>Global provider of wheels, tires, and undercarriage products for off-the-road equipment, offering quality service and career opportunities in a drug-free environment | Manufacturing | 🇺🇸 Quincy | 1,121 | 1890 |
| 7 | [Ball Horticultural Company](https://www.tamtam.ai/c/ball-horticultural-company) (ballhort.com)<br>Global leader in horticulture, supplying breeders, producers, and distributors with a wide range of plant varieties for gardening and commercial use worldwide | Farming | 🇺🇸 West Chicago | 696 |  |
| 8 | [Oil-Dri Corporation of America](https://www.tamtam.ai/c/oil-dri-corporation-of-america) (oildri.com)<br>A manufacturer of high-quality sorbent products for various markets, including cat litter, fluid purification, agriculture, animal gut health, and sports turf | Mining | 🇺🇸 Chicago | 644 |  |
| 9 | [Neovia group](https://www.tamtam.ai/c/neovia-group) (adm.com)<br>A global leader in animal nutrition, providing high-quality, sustainable solutions to advance nutritional performance and drive success worldwide | Food and Beverage Manufacturing | 🇺🇸 Chicago | 638 |  |
| 10 | [BRANDT®](https://www.tamtam.ai/c/brandt) (brandt.co)<br>An agriculture company offering advanced inputs, advice, and technical solutions to farmers worldwide, with products distributed in over 80 countries | Farming | 🇺🇸 Springfield | 594 | 1953 |
| 11 | [Valent BioSciences](https://www.tamtam.ai/c/valent-biosciences) (valentbiosciences.com)<br>Global leader in developing and commercializing environmentally friendly biorational products for agriculture, public health, and forest health markets, derived from biological origins | Farming | 🇺🇸 Libertyville | 594 | 2000 |
| 12 | [Precision Planting](https://www.tamtam.ai/c/precision-planting) (precisionplanting.com)<br>An agri-tech company leading the Precision Agriculture space, focused on innovative solutions to improve crop yields, sustainability, and feeding a growing world | Farming | 🇺🇸 Tremont | 437 | 1993 |
| 13 | [Big R Stores](https://www.tamtam.ai/c/big-r-stores) (homeandharvest.com)<br>Stock+Field offers a wide range of products for farm, pet, apparel, footwear, and outdoor needs They prioritize customer loyalty and community involvement | Retail | 🇺🇸 Watseka | 430 |  |
| 14 | [The Maschhoffs](https://www.tamtam.ai/c/the-maschhoffs) (themaschhoffs.com)<br>A large family-owned pork production network partnering with 300 Midwest family farmers to collectively produce enough pork for 15 million consumers annually | Food and Beverage Manufacturing | 🇺🇸 Carlyle | 395 |  |
| 15 | [Van Drunen Farms](https://www.tamtam.ai/c/van-drunen-farms) (vandrunenfarms.com)<br>A company specializing in providing dried and frozen whole food solutions to make healthy eating easier, with a focus on helping people develop and flourish | Food and Beverage Manufacturing | 🇺🇸 Momence | 377 | 1977 |
| 16 | [Central Life Sciences](https://www.tamtam.ai/c/central-life-sciences) (centrallifesciences.com)<br>The company offers solutions to control insects, supporting human and animal health, as well as improving plant and stored grain health | Biotechnology Research | 🇺🇸 Schaumburg | 202 |  |
| 17 | [Woods Equipment](https://www.tamtam.ai/c/woods-equipment) (woodsequipment.com)<br>Manufacturer of high quality, durable agricultural tractor attachments with a focus on design, durability, and style, showcased by innovative product design team | Machinery Manufacturing | 🇺🇸 Oregon | 193 | 1946 |
| 18 | [moveero](https://www.tamtam.ai/c/moveero) (moveero.com)<br>A global manufacturer of off-highway wheels, supplying high-quality products to agricultural, construction, industrial, and mining industries worldwide | Industrial Machinery Manufacturing | 🇺🇸 Armstrong | 192 | 1908 |
| 19 | [TeeJet Technologies](https://www.tamtam.ai/c/teejet-technologies) (teejet.com)<br>Design and manufacture of precision agricultural products including spray nozzles, valves, controls, GNSS guidance, and chemical injection systems. | Machinery Manufacturing | 🇺🇸 Glendale Heights | 119 | 1937 |
| 20 | [DICKEY-john](https://www.tamtam.ai/c/dickey-john) (dickey-john.com)<br>Design and manufacture precision agricultural instruments including moisture testers, ground speed sensors, and controllers for farmers and OEMs. | Farming | 🇺🇸 Auburn | 70 | 1966 |
| 21 | [Yetter Farm Equipment](https://www.tamtam.ai/c/yetter-farm-equipment) (yetterco.com)<br>A family-owned farm equipment manufacturer, offering innovative solutions for production agriculture since 1930, specializing in planter attachments, residue management, and precision fertilizer placement | Farming | 🇺🇸 Colchester | 62 | 1930 |
| 22 | [JOHN DEERE CO](https://www.tamtam.ai/c/john-deere-co) (deere.com)<br>A machinery company based in Moline, Illinois, specializing in manufacturing and distributing a variety of machinery products | Machinery Manufacturing | 🇺🇸 Moline | 61 |  |
| 23 | [Green Coffee Company](https://www.tamtam.ai/c/green-coffee-company) (greencoffeecompany.com)<br>A Colombian coffee company prioritizing sustainability and equity through innovative agricultural practices, producing exceptional coffee for farming communities and partners | Wholesale | 🇺🇸 Oak Brook | 57 | 2017 |
| 24 | [RhinoAg](https://www.tamtam.ai/c/rhinoag) (rhinoag.com)<br>Manufactures quality agriculture equipment including rotary mowers, rear blades, and posthole diggers sold worldwide for their dependability and performance | Machinery Manufacturing | 🇺🇸 Gibson City | 52 |  |
| 25 | [360 \| 360 RAIN • 360 YIELD](https://www.tamtam.ai/c/360-360-rain-360-yield) (360yieldcenter.com)<br>Develop retrofit tools and autonomous irrigation machines that optimize farm equipment performance and deliver precise water and nutrient management across fields. | Farming | 🇺🇸 Morton | 46 | 2014 |
| 26 | [Mathews Company](https://www.tamtam.ai/c/mathews-company) (mathewscompany.com)<br>A global manufacturer based in Crystal Lake, IL, specializing in innovative agriculture equipment since 1954 | Machinery Manufacturing | 🇺🇸 Crystal Lake | 34 | 1954 |
| 27 | [Slagel Manufacturing, Inc.](https://www.tamtam.ai/c/slagel-manufacturing-inc) (slagelmanufacturing.com)<br>A family-owned agricultural equipment manufacturer dedicated to quality products, customer satisfaction, and community impact for over 20 years | Machinery Manufacturing | 🇺🇸 Forrest | 16 | 1993 |
| 28 | [Prairie Land Power](https://www.tamtam.ai/c/prairie-land-power) (prairielandpowerequipment.com)<br>This company specializes in providing customers with high-quality mowers, tractors, harvesters, and planting equipment, earning a strong reputation in the industry | Farming | 🇺🇸 Jerseyville | 2 |  |

## 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

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- [Agriculture companies in Florida](https://www.tamtam.ai/l/agriculture-companies-florida) (25)

## The same list elsewhere

- [Agriculture companies in the world](https://www.tamtam.ai/l/agriculture-companies-in-the-world) (4,383)
- [Agriculture companies in North America](https://www.tamtam.ai/l/agriculture-companies-in-north-america) (697)

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Source: https://www.tamtam.ai/l/agriculture-companies-illinois