Three new option listings and fifteen option delistings on October 21st

New option listings for October 21st include Defiance Daily Target 2X Long IONQ ETF (IONX), Korro Bio Inc (KRRO), and Pattern Group Inc (PTRN). Option delistings effective October 21st include American Century Quality Preferred ETF (QPFF), WK KELLOGG CO (KLG), Big 5 Sporting Goods Corporation (BGFV), COUCHBASE INC. (BASE), ARK 21Shares Active Ethereum Futures Strategy ETF (ARKZ), ARK 21Shares Blockchain and Digital Economy Innovation ETF (ARKD), ARK 21Shares Active Bitcoin Futures Strategy ETF (ARKA), Axs Real Estate Income Etf (RINC), Sandstorm Gold (SAND), SCPHARMACEUTICALS INC. (SCPH), SpartanNash Co (SPTN), THERATECHNOLOGIES INC. (THTX), UNBX Stock (UNBX), Veritex (VBTX), and VERONA PHARMA PLC (VRNA).