The Bank of Lithuania, Robinhood's lead EU regulator, said it is "awaiting clarifications" regarding the structure of the company's OpenAI and SpaceX stock tokens. Robinhood says its stock tokens give users the ability to invest in shares in the form of blockchain-based tokens.

Robinhood's stock tokenization strategy opens up strong revenue potential but faces medium- to long-term regulatory inhibitions and resistance. See why HOOD is a Hold

We have contacted Robinhood and are awaiting clarifications regarding the structure of OpenAI and SpaceX stock tokens as well as the related consumer communication,” Bank of Lithuania spokesman Giedrius Šniukas told CNBC via email.