D1 Capital Partners L.P. Increases Stake in Kilroy Realty Corp to 9.5%

On May 15, 2026, D1 Capital Partners L.P. and Daniel Sundheim filed a Schedule 13G/A reporting a significant increase in their position in Kilroy Realty Corp (KRC). The reporting persons now beneficially own 11,275,077 shares of common stock, representing a 9.5% ownership stake in the company. This is a substantial increase from the previously reported 0.0% position, indicating a new major investment or a massive accumulation of shares. D1 Capital Partners L.P., acting as an investment manager for various private vehicles, and Daniel Sundheim, who indirectly controls the manager, share voting and dispositive power over these shares. The filing states that the securities were acquired in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. The ownership percentage is based on approximately 118.5 million shares outstanding as of early 2026. This move positions D1 Capital Partners as a major institutional shareholder in the Los Angeles-based real estate investment trust.