Grayscale Bitcoin Trust (BTC) Common Units of fractional undivided beneficial interest

The trust's Bitcoins are carried, for financial statement purposes, at fair value as required by U.S. generally accepted accounting principles ("GAAP"). The trust determines the fair value of Bitcoins based on the price provided by the Digital Asset Market that the trust considers its principal market as of 4:00 p.m., New York time, on the valuation date.