Private companies like Facebook, Uber, and Robinhood were once inaccessible to everyday investors. Historically, buying and selling shares in private firms has been complex and limited. However, the expansion of the private market is now within reach. As this shift unfolds, regulators worldwide are working to safeguard investors eager to enter this evolving space. This book explores the regulatory, technical, and societal hurdles in opening this asset class to a broader audience.