Securities in scope for 13D / G disclosure must be registered securities under Section 12 of the Exchange Act.
To establish if a security is Section 12 registered, you must review the company announcements.
(1) To review the company announcements, go to EDGAR company search:
https://www.sec.gov/edgar/search/#
(2) Enter the name of the issuer
(3) Click Search (NB. You may need to extend the โFiled date rangeโ)