Exhibit A SUMMIT MATERIALS, INC. EXECUTIVE SEVERANCE PLANSummit Materials, LLC • August 5th, 2021 • Mining & quarrying of nonmetallic minerals (no fuels)
Company FiledAugust 5th, 2021 IndustryQualifying Termination / Qualifying Change in Control Termination Severance Multiple: Tier 1: 2.5xTier 2: 2x Welfare Continuation Period: Tier 1: 30 monthsTier 2: 24 months Severance Payment Period: Tier 1: 30 monthsTier 2: 24 months