144 0001238913 XXXXXXXX LIVE 0001438133 TANDEM DIABETES CARE INC 001-36189 12400 HIGH BLUFF DRIVE San Diego CA 92130 858-366-6900 BLICKENSTAFF KIM D Board of Directors Chair Emeritus common Cowen Execution Services LLC

1633 Broadway 48th Floor New York NY 10019

10000 1200000.00 169577 11/20/2024 NASDAQ COMMON 08/11/2020 PURCHASE Tandem Diabetes Care, Inc N 24132 08/11/2020 cash Y 11/20/2024 /S/ Kim Blickenstaff