Stoke Therapeutics, Inc.

Bu siness. Overview We are a late-stage clinical company dedicated to addressing the underlying causes of severe diseases by upregulating protein expression with RNA-based medicines. Using our proprietary TANGO (Targeted Augmentation of Nuclear Gene Output) approach, we are developing antisense oligonucleotides ( ASOs ) to selectively restore protein levels. Our first investigational, new medicine in development, zorevunersen (STK-001), is a potential disease modifying medicine that is in late-stage clinical testing for the treatment of Dravet syndrome, a severe and progressive genetic epilepsy. Dravet syndrome is characterized by frequent, prolonged and refractory seizures beginning within the first year of life. The disease is classified as a developmental and epileptic encephalopathy due to the developmental delays and cognitive impairment associated with it. There are currently no disease modifying medicines approved for the treatment of Dravet syndrome. Dravet syndrome is one of many diseases caused by a haploinsufficiency in which a loss of approximately 50% of normal protein levels leads to disease. Our initial focus is on haploinsufficiencies and diseases of the central nervous system and the eye, although proof of concept has been demonstrated in other organs, tissues, and systems, supporting our belief in the broad potential for our proprietary approach. Zorevunersen is currently being evaluated in our global Phase 3 clinical study, EMPEROR, which was initiated in May 2025 , with the first patient dosed in August 2025..