If you search this forum or my YouTube channel for "MFSK Oddity" you will find discussions on this signal. This is a signal I call the MFSK Oddity in my logs, it has been active for a couple years+ on a variety of frequencies. It has several different widths, speeds, and formats.
Short story is, I am almost certain it is HFT, specifically a company called 10Band LLC with a couple of different experimental callsigns / licenses.
T!