Information leakage and supply chain contracts

•We consider a one-supplier-two-retailers supply chain where the incumbent has private information about demand.•We investigate information leakage under different contracts (WPC or RSC) with different retailers.•We explore the impact of the supplier’s and incumbent's incentives on the non-leakage equilibrium (NLE).•In case of high demand variations, NLE exists only when the supplier cooperates with the incumbent under a revenue-sharing contract.