At 10:00 UTC on December 27, 2023 Phemex will be listing the new spot trading pairs ALCX/USDT, DEGO/USDT and STX/USDT.
Source: https://phemex.com/announcements/new-spot-listings-alcx-dego-stx-and-nfp
STX/USDT
HTX to Launch STX Perpetual Futures
HTX will be launching STX/USDT perpetual futures at 10:00 (UTC) on December 5, 2023.
Source: https://www.htx.com/support/en-us/detail/94956069449435