Grinnell Mutual Reinsurance Company filed a workers compensation update in Pennsylvania on February 16, 2026, effective April 1, 2026.

The filing produces a 7.01% overall rate decrease, affecting 87 policyholders and reducing premium by about $16,590 on a $236,572 book. The company is adopting updated Pennsylvania Compensation Rating Bureau (PCRB) loss costs and lowering its loss cost multiplier from 1.768 to 1.710.

Grinnell is a PCRB member and last implemented a 10.10% decrease effective April 1, 2025.

The company is domiciled in Iowa.