As of December 31st, it held 0.09181239 BTC per share. We're about to have a stock split, though, happening tomorrow, so this figure will no longer be accurate per share, but the amount of BTC will still be proportional to this after the 1 to 91 stock split.

1,916,600 shares of the Trust issued and outstanding as of the date of this press release

172,094.67544221