AMC Entertainment Holdings Inc. has announced plans to issue up to 50 million shares through an at-the-market (ATM) offering, with Goldman Sachs acting as the sales agent and forward seller. This move led to a pre-market drop in AMC's stock price by around 9-15%. The announcement came shortly after a surge in meme stock activity, sparked by a cryptic post from Keith Gill, known as Roaring Kitty, which reignited interest in GameStop and other meme stocks. Investors expressed frustration on social media following AMC's stock offering announcement.