UMB Financial CEO J. Mariner Kemper Has Sold $91 Million in UMBF Stock — Including $2.4 Million in February 2026
J. Mariner Kemper, CEO of UMB Financial Corporation, has filed 3,764 insider transactions totaling $91 million in UMBF sales, with $2.4 million sold in early February 2026 at prices above $128.
J. Mariner Kemper, the CEO of UMB Financial Corporation (UMBF), has filed 3,764 insider transactions over his career — selling $91 million in stock. Most recently, Kemper sold 18,714 shares in early February 2026 for approximately $2.4 million at prices between $128 and $129 per share.
The Numbers
| Metric | Value |
|---|---|
| Career Sell Value | $91.2M |
| Total Transactions | 3,764 |
| Last Transaction | 2026-02-11 |
| Shares Remaining | ~328,710 (after tax withholding) |
Recent Activity
| Date | Type | Shares | Price | Est. Value |
|---|---|---|---|---|
| 2026-02-11 | Tax (F) | 1,090 | $132.16 | $144,054 |
| 2026-02-02 | Sell | 7,242 | $129.19 | $935,564 |
| 2026-02-02 | Sell | 7,972 | $128.04 | $1,020,764 |
| 2026-02-02 | Sell | 3,500 | $129.06 | $451,695 |
| 2025-12-08 | Sell | 15,367 | $114.58 | $1,760,751 |
Kemper’s recent selling has accelerated — $2.4 million in a single day in February 2026, preceded by a $1.76 million sale in December 2025. The February sales were split across multiple accounts at slightly different prices, consistent with a pre-arranged trading plan.
What It Means
The Kemper family is a banking dynasty in Kansas City. J. Mariner Kemper is the fourth generation to lead UMB Financial, which his great-grandfather founded in 1913. Despite the family legacy, Kemper has been a consistent seller — 3,764 transactions across his career represent one of the highest filing counts among regional bank CEOs.
With approximately 328,710 shares remaining after the latest tax withholding transaction, Kemper’s position is still substantial — worth roughly $43 million at current prices. But the pace of selling in late 2025 and early 2026 is notably faster than historical averages.
What to Watch
- Whether Kemper’s accelerated selling pace continues through Q1 2026
- UMB Financial’s next earnings report and regional banking sector trends
- Any new 10b5-1 plan filings or amendments
- UMBF stock performance relative to the KBW Regional Banking Index
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