Activist investor Chris Hohn's TCI Fund Management has established a new stake in Martin Marietta Materials (MLM), a leading supplier of construction aggregates. According to a quarterly disclosure filed with the SEC, TCI held 1.32 million shares valued at approximately $758.42 million as of June 30, 2026. This new holding accounted for 1.44% of TCI's reported portfolio.
Investors should note that 13F filings are released with a delay and reflect positions held at the end of the prior quarter. The filing also revealed that Hohn, a highly selective long-term investor, took a new position in competitor Vulcan Materials, signaling a broader move into the building materials sector. Hohn is known for running a concentrated portfolio of companies with significant competitive advantages.