Diamond Hill Investment Group (DHIL) Proxy Filing summary

Executive summary

• Agreement reached for acquisition by First Eagle Investment Management, with communications sent to clients outlining the rationale and next steps.

• Client relationships, investment philosophy, and processes are expected to remain unchanged post-transaction.

• A client call is scheduled for December 17, 2025, to discuss the acquisition and address questions.

• Forward-looking statements highlight expectations for operating results, assets under management, and transaction timing, subject to risks and uncertainties.

Voting matters and shareholder proposals

• The acquisition will be submitted to shareholders for approval, with a proxy statement to be filed with the SEC.

• Shareholders are encouraged to review all relevant documents before voting.

Board of directors and corporate governance

• Directors, executive officers, and related persons may participate in the proxy solicitation for the transaction.

• Information on director and executive officer stock ownership is available in the 2025 proxy statement and will be updated as needed.