Yeas ago, there were folks like Vic Neiderhoffer, who blew up twice, Max Ansbacher, who never got super large, and, more recently, the infamous James Cordier. Who’s doing naked or spread OTM calls, puts or ICs, in size nowadays?
For securities options a LOPR (Large Option Position Reporting) over 200 to one side - acting in concert get's filed with OCC and there is no public reporting unless a actionable compliance event results in a filing. So nobody can share that information.