Fidelity, Invesco, Valkyrie and WisdomTree joined BlackRock Friday in naming authorized participants for their proposed bitcoin ETFs. 

Some other competitors in the race to launch such funds have not yet done so.  

Authorized participants, or APs, are entities that create and redeem shares of an ETF. Typically, shares can then be exchanged for a similar basket of securities reflecting the holdings of the ETF, or for cash.

Fidelity named Jane Street and JPMorgan Securities as its APs — matching BlackRock’s choices made earlier in the day.

Valkyrie tapped Jane Street and Cantor Fitzgerald as its authorized participants, while WisdomTree also named Jane Street to serve that…

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