BlackRock (BLK) has added five additional authorized participants (APs) to the iShares Bitcoin Trust (IBIT), bringing the total number to nine as the fund continues to attract billions of dollars from investors.

The new APs include Wall Street banking giants Goldman Sachs, Citadel Securities, Citigroup and UBS as well as clearing house ABN AMRO, according to a prospectus filed with the U.S. Securities and Exchange Commission (SEC). They join Jane Street Capital, JP Morgan, Masquarie and Virtu Americas.

CoinDesk reported in January that Goldman Sachs was looking to play a key role for the bitcoin ETFs and was in talks with issuers about becoming an AP.

APs are an integral part of the ETF process as they help create liquidity by changing the supply of shares when there’s a shortage or a surplus. Large ETFs typically have dozens of APs, and in less than three months of existence, IBIT has become fairly sizable with nearly $18 billion in assets under management as of the close yesterday.

The participation of Goldman Sachs is particularly notable as its wealth management chief investment officer just this week said the bank believes that crypto has "no value" and feels no pressure to participate in the space even as other TradFi giants are taking major steps.

Read more: Goldman Sachs Clients Not Interested in Crypto, Says Chief Investment Officer

The Goldman news recalls that of JPMorgan, whose CEO Jamie Dimon publicly bashed cryptocurrencies for years, but became one of the original APs for BlackRock's IBIT when the fund launched in January.

CORRECTION (April 5, 2024, 17:51 UTC): Corrects the mention of Citadel, the hedge fund, to Citadel Securities, the market maker as an authorized participant.