[2] In 1933, the company moved to Grinnell, Iowa, and changed its name to "Farmers Mutual Reinsurance Association".

In response to the COVID-19 pandemic, Grinnell Mutual announced the Trust in Tomorrow Premium Payback.

[12] Firsthand (formerly Vault) has recognized Grinnell Mutual's co-op program as a Top 50 Internship since 2018.

[14] Ward Group has recognized Grinnell Mutual as a Top 50 Property and Casualty Performer since 2016.

[15] Ward Group screens property-casualty insurance companies for safety, consistency, and achieving superior performance on equity, assets, total revenue, growth in revenue, growth in surplus, and combined ratio over a five-year period.