biggest companies in Grinnell, IA

A member of the S&P 500 Index, Martin Marietta is an American-based company and a leading supplier of building materials – including aggregates, cement, ready mixed concrete and asphalt. Through a network of operations spanning 26 states, Canada and the Bahamas, dedicated Martin Marietta teams supply the resources necessary for building the solid foundations on which our communities thrive.

Alliant Energy Corporation (Alliant Energy) operates as a regulated investor-owned public utility holding company. Alliant Energy's primary focus is to provide regulated electricity and natural gas service to approximately one million electric and approximately 415,000 natural gas customers in the Midwest through its two public utility subsidiaries. The primary first tier subsidiaries of Alliant Energy are: Interstate Power and Light Company (IPL), Wisconsin Power and Light Company (WPL), Resources and Corporate Services. IPL is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in Iowa and southern Minnesota. WPL is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in southern and central Wisconsin. On February 1, 2013, it sold RMT, Inc.

Alpha Broadcasting is a media company that provides media content to its clients. Alpha Broadcasting offers a range of media content formats to its clients, including top 40, adult contemporary, Spanish, news talk, sports, rock, and country. Alpha Broadcasting was founded in 2009 and is based in Oregon.

Value-add, lean transformation, supply chain excellence, capital efficiency and nurturing relationships.

Now in our second century of service, still committed to our trusted relationships with you. Trust in Tomorrow.® Grinnell Mutual, in business since 1909, is the 108th-largest property casualty insurance company in the United States and the largest primary reinsurer of farm mutual companies in North America. Our products are available in 17 states. We have earned an 'A'​ (Excellent) rating for financial strength from A.M. Best since 1976 and have been a Property-Casualty Ward’s 50® Company since 2016. Insurance Journal named us to their Top 100 Super Regional Property/Casualty Insurers in 2019. We have also been recognized as an Iowa Top Workplace since 2011. Forbes ranked us the fifth best Iowa employer in their inaugural list of America's Best-in-State Employers. Vault ranked us #11 in their 2021 Best Internships survey.

Heartland Co-Op, Inc., a farmer owned cooperative company, provides products and services to local farmers in commodity and product areas in Iowa. Its agronomy solutions include crop nutrition products, such as anhydrous ammonia, urea, phosphate, phosphate microessentials, potash, mixed fluids, micronutrients, and lime; seed solutions, including small seed products, cover crop management solutions, seed treatment options, bulk seeds, and seed financing; and precision agricultural services, such as soil sampling solutions, variable rate solutions, management zone programs, and mapping services. The company s agronomy solutions also comprise agronomy services, such as custom applications, application equipment rental, aerial applications, equipment finance programs, crop monitoring solutions, plant tissue testing programs, plant health management programs, cooperating research projects, financing programs, estate planning for farm families, and property casualty insurance; and crop protection products, including bulk products, mini-bulk products, packaged products, and resistance management programs. It also offers grain, seed, petroleum, and feed products. Heartland Co-Op, Inc. was formerly known as Alleman Cooperative Co. and changed its name to Heartland Co-Op, Inc. in 1993. The company was incorporated in 1907 and is based in West Des Moines, Iowa.

We address challenges like poverty, homelessness, unemployment, behavioral health, mental health and much more. Four Oaks Family and Children Services serves over 27,000 children and families in Iowa per year.

Begin at R.P. Lumber for BEST SERVICE, Building Materials, Power Tools, Housewares, Plumbing, Lawn & Garden, and so much more. Order Online. Pickup In Store or Choose Professional Delivery.

The midwest's leading John Deere equipment dealer. Van Wall Equipment provides industry leading sales, service,& support. Shop online or stop in today

Lincoln Savings Bank in Iowa offers a full suite of personal and business banking services. Explore accounts, loans, digital solutions and more online.

We are a family owned business founded in 1951 headquartered in Columbus, OH operating 8 manufacturing plants & sales engineering offices through the U.S.

Brownells is your home for firearm accessories, gun parts, gunsmithing tools, reloading and shooting supplies backed by our 100% satisfaction guarantee.

K&M Tire is a tire wholesale company established in 1970.