J. Mariner Kemper is CEO & Chairman at UMB FINANCIAL CORP (UMBF). They have made 223 open-market trades across 1 company since 2006, most recently 2026-08-04.
CIK 0001229109
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 223 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| UMBF | 1,491,138 | $195.5M |
Shares reported on the most recent Form 4, priced at the 2026-08-06 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| UMBF | SELL | 2026-08-04 | 2026-08-06 | $148.55 | $2.2M | +3.4% | -1.7% | — |
| UMBF | SELL | 2026-08-03 | 2026-08-04 | $147.27 | $619K | +2.7% | -3.2% | — |
| UMBF | SELL | 2026-02-02 | 2026-02-03 | $128.68 | $2.4M | -0.2% | -8.9% | +0.4% |
| UMBF | SELL | 2025-12-08 | 2025-12-08 | $114.58 | $3.5M | +4.6% | +4.9% | -0.5% |
| UMBF | SELL | 2025-09-09 | 2025-09-11 | $124.75 | $561K | -1.2% | -4.2% | -2.4% |
| UMBF | SELL | 2025-08-13 | 2025-08-14 | $116.33 | $3.6M | +4.6% | +2.6% | -6.4% |
| UMBF | SELL | 2025-06-02 | 2025-06-02 | $101.82 | $699K | +1.6% | +7.8% | +19.7% |
| UMBF | SELL | 2025-02-21 | 2025-02-25 | $108.61 | $760K | -4.3% | -5.4% | -2.2% |
| UMBF | SELL | 2024-12-02 | 2024-12-04 | $124.95 | $6.1M | -3.5% | -11.4% | -18.7% |
| UMBF | SELL | 2024-11-01 | 2024-11-04 | $108.70 | $4.9M | +14.0% | +17.9% | +5.0% |
| UMBF | SELL | 2024-10-01 | 2024-10-02 | $101.80 | $4.8M | +9.1% | +8.0% | +12.6% |
| UMBF | SELL | 2024-09-03 | 2024-09-04 | $103.01 | $2.5M | +2.3% | +0.8% | +22.5% |
| UMBF | SELL | 2024-08-22 | 2024-08-26 | $97.85 | $98K | -1.9% | +1.8% | +25.4% |
| UMBF | SELL | 2024-08-06 | 2024-08-07 | $93.01 | $1.3M | +6.3% | +7.5% | +19.6% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $95.26 | $12K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $93.73 | $412K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $94.86 | $155K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $93.12 | $198K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $94.13 | $149K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $93.53 | $457K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-08-02 | 2024-08-05 | $93.34 | $413K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $97.16 | $1.0M | +6.7% | +13.1% | +19.4% |
| UMBF | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $97.42 | $888K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL · 10b5-1 | 2024-08-01 | 2024-08-05 | $97.88 | $732K | +6.7% | +13.1% | +19.4% |
| UMBF | SELL | 2024-07-03 | 2024-07-05 | $84.00 | $680K | +17.8% | +10.2% | +24.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.