J MARINER KEMPER
CIK 1229109 · Chairman and CEO · last filed 2026-02-13
J MARINER KEMPER is a Chairman and CEO who has filed 328 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider had shares withheld for taxes covering $144.1K of UMBFO on Feb 13, 2026. Across all open-market trades the lifetime net is −$91.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $257.1M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$257.07M
3
328
-$91.13M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| UMBFO | Chairman and CEO | 329,710 | $26.58 | $8.76M | -$6.54M | 11 | 2026-02-13 |
| UMB FINANCIAL CORP (UMBFP) Delisted | Chairman and CEO | 728,395 | $25.00 | $18.21M | -$931.1K | 9 | 2025-06-02 |
| UMBF | Chairman and CEO | 1,834,291 | $135.37 | $248.31M | -$83.66M | 308 | 2025-01-29 |
Recent Filings
328 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-02-13 | UMBFO | Tax (F) | −1,090 | -$144.1K | EDGAR |
| 2026-02-12 | UMBFO | Tax (F) | −1,721 | -$228.7K | EDGAR |
| 2026-02-11 | UMBFO | Tax (F) | −1,904 | -$255.7K | EDGAR |
| 2026-02-10 | UMBFO | Mixed | +14,467 | -$274.4K | EDGAR |
| 2026-02-03 | UMBFO | Sell (S) | −18,714 | -$2.41M | EDGAR |
| 2026-01-02 | UMBFO | Tax (F) | −7,629 | -$877.6K | EDGAR |
| 2025-12-08 | UMBFO | Sell (S) | −15,367 | -$1.76M | EDGAR |
| 2025-11-04 | UMBFO | Grant (A) | +5,613 | $0 | EDGAR |
| 2025-09-11 | UMBFO | Sell (S) | −4,500 | -$561.4K | EDGAR |
| 2025-09-11 | UMBFO | Gift (G) | — | $0 | EDGAR |