# Top 26 agriculture companies in Ontario

Tamtam tracks 26 agriculture companies headquartered in Ontario. This list ranks all of them by number of employees on LinkedIn, led by McCain Foods, Linamar Corporation and Mastronardi Produce. Their median headcount is 323. Half of them were founded in 1978 or later. The most common headquarters are Toronto (4) and Guelph (3).

These companies are primarily large-scale food and beverage manufacturers and agricultural businesses based in Ontario. They include global leaders and established Canadian firms. Many of these companies focus on sustainable practices and innovation within their respective agricultural and food production sectors.

Key companies include McCain Foods, a global leader in prepared potato products; Linamar Corporation, an advanced manufacturing company specializing in vehicle solutions; Mastronardi Produce, known for year-round greenhouse growing of fresh fruits and vegetables; and Gay Lea Foods, a Canadian dairy industry leader. A notable pattern is the concentration of agricultural and food processing businesses, with several companies headquartered in the Kingsville and Leamington areas, indicating a regional cluster for these industries.

🇨🇦 Ontario · 26 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [McCain Foods](https://www.tamtam.ai/c/mccain-foods) (mccain.com)<br>Global leader in prepared potato products, including French Fries and appetizers, focusing on quality, sustainability, and community impact. | Food and Beverage Manufacturing | 🇨🇦 Toronto | 22,000 | 1957 |
| 2 | [Linamar Corporation](https://www.tamtam.ai/c/linamar-corporation) (linktr.ee)<br>Advanced manufacturing company specializing in solutions for vehicles, motion, work, and lives Comprised of Industrial and Mobility segments, with global reach and innovative products | Motor Vehicle Manufacturing | 🇨🇦 Guelph | 6,668 | 1966 |
| 3 | [Mastronardi Produce](https://www.tamtam.ai/c/mastronardi-produce) (sunsetgrown.com)<br>Year-round greenhouse growing and distribution of fresh fruits and vegetables under SUNSET, Backyard Farms, and Queen of Greens brands for seventy years. | Food and Beverage Services | 🇨🇦 Kingsville | 1,629 | 1954 |
| 4 | [Gay Lea Foods](https://www.tamtam.ai/c/gay-lea-foods) (gaylea.com)<br>Canadian dairy industry leader, co-operative with over 1,395 farms in Ontario and Manitoba, focused on innovation, high quality products, and sustainable growth | Food and Beverage Manufacturing | 🇨🇦 Etobicoke | 891 | 1958 |
| 5 | [Arterra Wines Canada](https://www.tamtam.ai/c/arterra-wines-canada) (arterracanada.com)<br>Leading Canadian wine producer and marketer with 140 years experience, managing premium vineyards and building beloved wine brands nationwide. | Beverage Manufacturing | 🇨🇦 Mississauga | 764 | 1874 |
| 6 | [Semex](https://www.tamtam.ai/c/semex) (semex.com)<br>Specializing in genetics for life, the company offers innovative solutions for genetic improvement in agriculture, focusing on sustainable and efficient breeding practices | Biotechnology Research | 🇨🇦 Guelph | 543 | 1997 |
| 7 | [Burnbrae Farms](https://www.tamtam.ai/c/burnbrae-farms) (burnbraefarms.com)<br>A family-owned egg producer in Canada for over 70 years, supplying eggs and egg products to grocery stores, food service operations, and large bakery customers nationwide | Food and Beverage Manufacturing | 🇨🇦 Lyn | 526 | 1891 |
| 8 | [Mucci Farms](https://www.tamtam.ai/c/mucci-farms) (muccifarms.com)<br>Greenhouse fruit & vegetable grower and marketer focused on premium quality, flavor, and innovation for food safety, sustainability, and efficiency | Farming | 🇨🇦 Kingsville | 471 |  |
| 9 | [Pure Flavor® Farms](https://www.tamtam.ai/c/pure-flavor-farms) (pure-flavor.com)<br>A family of sustainable greenhouse vegetable growers committed to providing high-quality, flavorful produce to customers across North America | Food and Beverage Services | 🇨🇦 Leamington | 399 | 2003 |
| 10 | [Nature Fresh Farms](https://www.tamtam.ai/c/nature-fresh-farms) (naturefreshfarms.com)<br>Innovative greenhouse grower focused on sustainable practices, including using good bugs for pest control and a closed loop water system for fresh vegetables | Food and Beverage Manufacturing | 🇨🇦 Leamington | 391 | 1999 |
| 11 | [Red Sun Farms](https://www.tamtam.ai/c/red-sun-farms) (redsunfarms.com)<br>A leading high-tech greenhouse grower in North America, specializing in seed-to-plate production to deliver innovative and flavorful greenhouse produce with exceptional customer service | Food and Beverage Services | 🇨🇦 Kingsville | 331 |  |
| 12 | [Highline Mushrooms](https://www.tamtam.ai/c/highline-mushrooms) (highlinemushrooms.com)<br>Leading Canadian fresh and organic mushroom producer, specializing in growing, shipping, and marketing high-quality products worldwide | Food and Beverage Manufacturing | 🇨🇦 Leamington | 328 | 1961 |
| 13 | [Conestoga Meats](https://www.tamtam.ai/c/conestoga-meats) (conestogameats.com)<br>A premium pork processor owned by Ontario family farmers, committed to responsibly raised, high-quality pork products for global communities | Food and Beverage Manufacturing | 🇨🇦 Breslau | 323 | 1982 |
| 14 | [Kubota Canada Ltd.](https://www.tamtam.ai/c/kubota-canada-ltd) (kubota.ca)<br>A company dedicated to engineering excellence in agriculture and construction, focused on building a better future through quality products and community investment | Machinery Manufacturing | 🇨🇦 Pickering | 203 | 1975 |
| 15 | [Premier Equipment](https://www.tamtam.ai/c/premier-equipment) (premierequipment.ca)<br>A dynamic organization specializing in John Deere equipment for agriculture, lawn care, commercial grounds, and construction, offering excellent career opportunities | Machinery Manufacturing | 🇨🇦 Elmira | 200 |  |
| 16 | [Salford Group](https://www.tamtam.ai/c/salford-group) (salfordgroup.com)<br>Manufacturer of tillage and application equipment, setting industry standards for power and precision Global distribution network with manufacturing facilities in Canada, Iowa, and Georgia | Machinery Manufacturing | 🇨🇦 Salford | 187 | 1978 |
| 17 | [Hensall Co-op](https://www.tamtam.ai/c/hensall-co-op) (hensallco-op.ca)<br>A leading Canadian non-financial co-operative offering agricultural products and services to members globally, specializing in animal nutrition, crop services, and more | Food and Beverage Manufacturing | 🇨🇦 Hensall | 185 | 1937 |
| 18 | [Walinga Inc](https://www.tamtam.ai/c/walinga-inc) (walinga.com)<br>This company manufactures a variety of equipment including grain vacs, pneumatic conveying equipment, trailers, trucks, and dust collection systems for the agriculture industry | Machinery Manufacturing | 🇨🇦 Guelph | 185 | 1954 |
| 19 | [HJV Equipment](https://www.tamtam.ai/c/hjv-equipment) (hjvequip.com)<br>Agricultural equipment supplier specializing in top quality products, superior engineering, and exceptional service to support customers in feeding the world | Farming | 🇨🇦 Alliston | 136 | 1991 |
| 20 | [BroadGrain Commodities Inc.](https://www.tamtam.ai/c/broadgrain-commodities-inc) (broadgrain.com)<br>Global marketer and originator of grains, cereals, oilseeds, and pulses for food and feed markets, ensuring quality and traceability worldwide | International Trade and Development | 🇨🇦 Toronto | 83 | 2003 |
| 21 | [Horst Welding](https://www.tamtam.ai/c/horst-welding) (horstwelding.com)<br>Manufacturer of mass-produced and custom products for Agriculture, Construction, and Maintenance sectors, offering innovative equipment under distinct brand names, founded on Christian principles | Machinery Manufacturing | 🇨🇦 Listowel | 52 |  |
| 22 | [Penta Equipment](https://www.tamtam.ai/c/penta-equipment) (pentaequipment.com)<br>An agricultural manufacturing company producing TMR mixers, spreaders, and dump boxes, focused on providing robust equipment to optimize farmers' productivity worldwide | Machinery Manufacturing | 🇨🇦 Glencoe | 49 |  |
| 23 | [Conestogo Agri Systems Inc](https://www.tamtam.ai/c/conestogo-agri-systems-inc) (conestogoagri.ca)<br>A logistics and supply chain company in Ontario, Canada specializing in agricultural systems | Transportation, Logistics, Supply Chain and Storage | 🇨🇦 Alma | 11 |  |
| 24 | [MPX International Corporation](https://www.tamtam.ai/c/mpx-international-corporation) (mpxinternationalcorp.com)<br>Multinational cannabis company cultivating, manufacturing, and marketing cannabinoid-based products across four continents, positioning itself as a global industry participant | Pharmaceutical Manufacturing | 🇨🇦 Toronto | 8 | 2018 |
| 25 | [CRAFTOP LATAM](https://www.tamtam.ai/c/craftop-latam) (craftop.com)<br>The company manufactures and distributes a range of gardening and agriculture machines worldwide, focusing on providing exceptional customer experiences | Manufacturing | 🇨🇦 Oakville | 7 | 2000 |
| 26 | [Advanced Bio-Material Technologies Corporation](https://www.tamtam.ai/c/advanced-bio-material-technologies-corporation) (advancedbmt.com)<br>A company specializing in developing advanced plastics that are lighter, stronger, and more cost-effective for various applications | Textile Manufacturing | 🇨🇦 Toronto | 5 | 2016 |

## 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 Canada

- [Agriculture companies in Canada](https://www.tamtam.ai/l/agriculture-companies-canada) (105)

## 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-ontario