Key Points Madrone Advisors acquired 75.8 million shares, valued at over $1.2 billion. The holding now represents 62.8% of Madrone's 13F reportable assets under management. The new position is now Madrone's largest holding. These 10 stocks could mint the next wave of millionaires › What happened Madrone Advisors, LLC initiated a new stake in StubHub (NYSE:STUB), according to a quarterly Form 13F filed with the Securities and Exchange Commission on Nov. 14, 2025 (SEC filing). The filing shows Mad ...