KEMPER J MARINER 4

What Happened Kemper J. Mariner, Chairman and CEO of UMB Financial Corp. (UMBF), sold a total of 18,714 shares in open-market transactions on February 2, 2026, for aggregate proceeds of $2,408,023. The filing shows three reported sale tranches: 3,500 shares (weighted avg $129.06) for $451,695; 7,972 shares (weighted avg $128.04) for $1,020,764; and 7,242 shares (weighted avg $129.19) for $935,564. These were outright sales (transaction code S), which are often routine transactions and do not by themselves indicate a change in company fundamentals.

Key Details

• Transaction date: 2026-02-02; Form filed 2026-02-03 (timely filing).
• Reported tranches and prices:
  • 3,500 shares @ weighted avg $129.06 = $451,695 (prices in this tranche fell within the 128.76–129.74 range per footnote)
  • 7,972 shares @ weighted avg $128.04 = $1,020,764 (prices in this tranche ranged 127.73–128.73 per footnote)
  • 7,242 shares @ weighted avg $129.19 = $935,564 (prices in this tranche fell within the 128.76–129.74 range per footnote)
• Total shares sold: 18,714; total proceeds: $2,408,023.
• Shares owned after transaction: not specified in the provided excerpt of the filing.
• Notable footnotes: weighted-average prices reported; sales occurred in multiple transactions across the price ranges noted above. The reporting person offered to provide per-price breakdowns on request.
• No indication in the excerpt of a 10b5-1 plan, option exercise, gift, or tax-withholding event.

Context

• These were open-market sales by the CEO. Sales are common for executives (taxes, diversification, liquidity) and are not definitive signals of company outlook. No derivative exercises or awards are reported in this filing excerpt.