KEMPER J MARINER 4

What Happened
Kemper J. Mariner, Chairman and CEO of UMB Financial Corp., had 1,904 shares disposed on Feb 9, 2026 to satisfy a tax liability related to the vesting of restricted stock units (RSUs). The disposition was recorded at $134.29 per share for a total value of approximately $255,688. This was a tax-withholding disposition (transaction code F), not an open-market purchase.

Key Details

• Transaction date: 2026-02-09; Filing date: 2026-02-11 (filed within the typical two-business-day window).
• Shares disposed: 1,904 at $134.29 per share; total value ~$255,688.
• Transaction type: F — payment of tax liability/withholding related to vested equity.
• Footnotes: F1 indicates the shares relate to dividends earned upon vesting of the underlying RSUs. F2 notes ESOP allocations/dispositions since the last report (as disclosed in the filing).
• Shares owned after transaction: not specified in the provided filing excerpt.

Context
Withholdings to cover taxes on vested RSUs are routine and reflect a tax obligation rather than an active decision to sell for investment or cash needs. Such transactions are common after vesting events and are generally not interpreted as a strong signal of the insider’s view of the company’s prospects.