Inhibikase Therapeutics, Inc. (the “Company,” “we” or “our”) is a clinical-stage pharmaceutical company developing therapeutics for Parkinson’s Disease, or PD, and related disorders that arise inside and outside of the brain. In 2021, we commenced clinical development of IkT-148009, a small molecule Abelson Tyrosine Kinase inhibitor we believe can modify the course of Parkinson’s disease including its manifestation in the gastrointestinal tract, or GI. Results to date of our ongoing Phase 1 Single and Multiple Ascending Dose escalation study (SAD and MAD, respectively) in older and elderly healthy volunteers have revealed important insights into the safety, tolerability and pharmacokinetics of IkT-148009 in human subjects. We enrolled 88 subjects in the Phase 1 study. Results from the Phase 1 study have shown that IkT-148009 has a half-life of greater than 24 hours and just a 25 mg once-daily oral dose in older and elderly healthy subjects in our Phase 1 study reached exposures that are consistent with the exposure to the drug that resulted in therapeutic efficacy in animal models of progressive Parkinson’s disease. In July 2021, the U.S. Food and Drug Administration, or FDA, agreed with the Company’s plan to initiate its Phase 1b study in Parkinson’s patients which commenced dosing October 19, 2021, and one cohort of 8 patients have completed the Phase 1b study to date. The Company anticipates initiating Phase 2 studies of IkT-148009 in Parkinson’s disease in the second quarter of 2022, subject to agreements with the FDA. Clinical development of IkT-148009 for the GI complications in PD patients will cross-reference the Phase 1 study of IkT-148009 for the treatment of PD. Our efforts in Parkinson’s disease are being extended into other Parkinson’s-related indications, such as the Orphan Disease Multiple Systems Atrophy, or MSA. Depending on the outcome of animal model studies of MSA, the Company may initiate Phase 2 studies of IkT-148009 in MSA in the fourth quarter of 2022 following regulatory submissions in the U.S. and European Union, or EU. Clinical development of the Company’s oncology asset, IkT-001Pro, is anticipated to begin shortly after submission of the Company’s Investigational New Drug application, or IND, for IkT-001Pro; submission of the IND is anticipated to occur in the second quarter of 2022.

Our advancement of the pre-clinical and clinical development program for MSA was benefited by a grant received from the National Institute of Neurological Diseases and Stroke, or NINDS, an Institute of the National Institutes of Health, for $385,888 to fund animal model studies of IkT-148009 as a therapy for MSA. These animal studies are now underway. At the same time, we are preparing regulatory submissions to the European Medicines Agency, or EMA, and to the FDA to enable a Phase 2a safety and tolerability study in MSA patients in up to 19 sites in the EU, and up to 6 sites in the U.S. involving 60 patients. The proposed clinical Phase 2a study will have primary endpoints in safety and tolerability and exploratory endpoints in MSA efficacy parameters with 3 month daily dosing at two different doses. While we complete the set-up of the Phase 2a study in MSA, we will complete at least one animal model study to support advancing IkT-148009 into patients in the fourth quarter of 2022. Dosing of patients with MSA will depend on a positive outcome in animal model studies; if IkT-148009 is not a successful therapy in MSA model studies, the Phase 2a clinical study will not proceed. In this circumstance, the regulatory effort for IkT-148009 in the EU would be applied to future studies of Parkinson’s disease efficacy in the EU. The Company plans to pursue orphan drug designation for IkT-148009 to treat Multiple System Atrophy with regulators in the U.S. and Europe.

We have also advanced clinical batch manufacturing and pill formulation for our platform prodrug technology involving IkT-001Pro. Clinical batch manufacturing was completed in the fourth quarter of 2021 and an IND is planned to be filed in the second quarter of 2022, to include the production of the data package for the final pill formulation.

In the ensuing 12 months, the Company anticipates reporting the full outcomes of its completed Phase 1 study of IkT-148009 in older and elderly healthy subjects, reporting the outcomes of the completed chronic toxicology studies in rats and monkeys for IkT-148009 to enable chronic drug administration in Parkinson’s patients, completing a Phase 1b extension study of IkT-148009 in Parkinson’s patients and initiating its Phase 2a efficacy study in Parkinson’s patients. Advancement of the Company’s Phase 2a program in PD with IkT-148009 is subject to review and agreements with the FDA. We further anticipate initiating the Phase 2a clinical study in MSA in the U.S. and EU, subject to a successful model study outcome and agreements with regulatory agencies in the U.S. and EU. Finally, we intend to advance IkT-001Pro through IND filing and initiate clinical development, possibly completing clinical development in 2022.

Our programs utilize small molecule, oral protein kinase inhibitors to treat PD and its GI complications. We have shown in animal models of progressive PD that our lead clinical candidate, IkT-148009, is a brain penetrant Abelson tyrosine kinase, or c-Abl inhibitor, that halts disease progression and reverses functional loss in the brain and reverses neurological dysfunction in the GI tract. We have not yet observed reversal of functional loss in humans. The ability to halt progression and restore function was shown in animal models of progressive disease that mimic the rate of disease progression and the extent of functional loss in the brain and/or the GI tract as found in patients with PD. We believe our therapeutic approach is disease-modifying. Our understanding of how and why PD progresses has led us to believe that functional loss in Parkinson’s patients may be at least partially reversed. Based on the measurements in animal models, we believe patients treated with IkT-148009 may have their disease progression slowed or halted, we may see a progressive reduction in the need for symptomatic or supportive therapy and/or we may ultimately eliminate the need for

symptomatic therapy. However, as of the date of this Quarterly Report on Form 10-Q ("Report"), it is unknown whether the disease modification seen in the animal models will occur in patients following treatment with IkT-148009.