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J MARINER KEMPER

CIK 1229109 · Chairman and CEO · last filed 2026-08-06

J MARINER KEMPER is a Chairman and CEO who has filed 336 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider sold $2.2M of UMBF on Aug 6, 2026. Across all open-market trades the lifetime net is −$96.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $109.1M 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.

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Disclosed Exposure

$109.06M

Companies

3

Total Filings

336

Lifetime Open-Market Net

-$96.22M

Filer Profile

Reported Address
1010 GRAND BLVD.
KANSAS CITY, MO 64106
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
UMBF Chairman and CEO 720,739 $139.49 $100.54M -$88.75M 311 2026-08-06
UMBFO Chairman and CEO 329,710 $25.86 $8.53M -$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

Recent Filings

336 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-08-06 UMBF Sell (S) −15,062 -$2.24M EDGAR
2026-08-06 UMBF Sell (S) −15,062 -$2.24M EDGAR
2026-08-04 UMBF Mixed +5,561 -$618.5K EDGAR
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
2026-02-02 UMBF Notice (144) −3,500 -$451.7K EDGAR
2026-01-02 UMBFO Tax (F) −7,629 -$877.6K EDGAR
Showing 1–10 of 336
Page 1 of 34
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.