Exhibit A SUMMIT MATERIALS, INC. EXECUTIVE SEVERANCE PLANExecutive Severance Plan • August 5th, 2021 • Summit Materials, LLC • Mining & quarrying of nonmetallic minerals (no fuels)
Contract Type FiledAugust 5th, 2021 Company 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