J. Mariner Kemper, Chairman and CEO of UMB Financial Corp, filed a Form 4 on November 3, 2026, disclosing transactions in UMB Financial common stock dated October 31 and November 2, 2026.

Key Highlights

  • Tax withholding disposal: 815 shares of common stock were disposed of on October 31, 2026, at $134.47 per share under transaction code F, leaving 327,909.2177 shares held directly.
  • Trust transfer out: 15,062 shares were transferred out (transaction code G, $0 price) on November 2, 2026, reducing the RC Kemper Irrevocable Trust indirect holding to 1,476,076 shares.
  • Trust transfer in: 15,062 shares were simultaneously transferred into the Mary S Kemper Trust on November 2, 2026, at $0, bringing that trust's indirect holding to 27,620 shares.
  • Extensive indirect holdings: The filing reports numerous additional indirect positions, including 288,945 shares held by Kemper Realty and 392,029 shares held by Pioneer Service Corporation.
  • Dual role: Kemper is identified in the filing as both a Director and an Officer, holding the title Chairman and CEO of UMB Financial Corp (NASDAQ:UMBF).
  • Signed by attorney-in-fact: The form was signed by Jason Bartel as attorney-in-fact for Mr. Kemper on November 3, 2026.

Kemper's October-November 2026 Transactions at UMB Financial

According to the filing, J. Mariner Kemper reported two categories of activity. On October 31, 2026, 815 shares of UMB Financial Corp common stock were disposed of at $134.47 per share using transaction code F, which the filing records as a disposition. Following that transaction, Kemper's direct beneficial ownership stood at 327,909.2177 shares.

On November 2, 2026, two gift transactions (code G) involving 15,062 shares each were recorded at a price of $0. The filing shows that 15,062 shares were disposed of from the RC Kemper Irrevocable Trust, reducing that trust's indirect holding to 1,476,076 shares, while 15,062 shares were acquired into the Mary S Kemper Trust, bringing that trust's indirect holding to 27,620 shares. Both positions are listed as indirect beneficial ownership held through trusts.

The filing also details a wide range of additional indirect beneficial ownership positions reported without associated transactions in this filing. These include 1,020.29 shares held in a custodial brokerage account by a daughter, 1,024.082 shares in a son's custodial brokerage account, 2,352.3 shares through an ESOP, 1,314.921 shares in the J. Mariner Kemper Trust, 5,561 shares in the RC Kemper Irr Dynasty for John Mariner Kemper trust, 21,460 shares in the TUW RC Kemper For John Mariner trust, 8,216.735 shares in the Megan Kemper Trust, 288,945 shares held by Kemper Realty, and 392,029 shares held by Pioneer Service Corporation, according to the filing.

What Was Disclosed

UMB Financial Corp's Chairman and CEO J. Mariner Kemper disclosed a tax-related share disposal of 815 shares at $134.47 and a pair of offsetting gift transfers of 15,062 shares between two trusts, along with extensive indirect ownership across multiple trusts and entities.