1207407 Ontario Limited

1207407 Ontario Limited is a private Canadian investment holding company based in Toronto, Ontario. The company is primarily known as the largest shareholder of Cipher Pharmaceuticals Inc., a specialty pharmaceutical company focused on dermatology. Originally established and owned by Dr. John D. Mull, the founder of CML Healthcare, control of the entity was transferred to his son, Craig Mull, in 2022. The company actively participates in the governance of its portfolio companies and has historically engaged in shareholder activism to influence strategic decisions and board composition. It serves as the primary investment vehicle for the Mull family's interests in the life sciences and healthcare sectors. Through its significant stake in Cipher Pharmaceuticals, the company maintains a strong influence over the commercialization and development of dermatological products in North America.