Jul 9, 2026 – 5.17pmSam and Jack Gance, the two brothers who co-founded Chemist Warehouse, have signalled they will sell up to 20 per cent of their combined near $8 billion stake Sigma Healthcare when their shares come out of escrow next month.The sell down means a massive parcel of shares in the tightly held company will hit the market on August 27 as the billionaire co-founders of the retail and pharmacy empire outlined what they planned to do with their huge shareholdings for the first time.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles