Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.
Disclosed holdings
$368.3M
1-day change
▲ 0.22%
Positions on file
1
issuers disclosed in Forms 3/4/5 and Schedules 13D/G
Disclosed holdings over time
53 weekly points
What the 1
currently disclosed position would have been worth at each week’s
closing price. A rising line means the shares got more valuable, not that this
person bought more.
How the line is builti
Share counts are as last reported to the SEC and held constant; only prices move.
2025-09-05$273.9M – $389.6M2026-09-04
Insider activity Nov 1, 2018 – Feb 11, 2026
J. Mariner Kemper is recorded in filings to the U.S. SEC via EDGAR as
officer and board member, and
reported 499
transactions between Nov 1, 2018 and Feb 11, 2026. The buy and sell totals below count only
codes P, S.
Why the other codes are excludedi
Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.
Open-market buys (code P)
None
0 purchases on file
Open-market sales (code S)
$31.29M
478 sales on filepriced rows only
All reported transactions
499
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window
Events from filings
Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.
J. Mariner Kemper sold 18,714 UMB FINANCIAL CORP (UMBF) shares for $2,408,039 on Feb 2, 2026
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 18,714 UMB FINANCIAL CORP (UMBF) shares for $2,408,039 on Feb 2, 2026
Total of the rows above: $2,408,039, in the currency the filings report.
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
J. Mariner Kemper sold 15,367 UMB FINANCIAL CORP (UMBF) shares for $1,760,751 on Dec 8, 2025
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 15,367 UMB FINANCIAL CORP (UMBF) shares for $1,760,751 on Dec 8, 2025
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
J. Mariner Kemper sold 3,400 UMB FINANCIAL CORP (UMBF) shares for $426,258 on Sep 9, 2025
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 3,400 UMB FINANCIAL CORP (UMBF) shares for $426,258 on Sep 9, 2025
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
J. Mariner Kemper sold 15,523 UMB FINANCIAL CORP (UMBF) shares for $1,805,791 on Aug 13, 2025
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 15,523 UMB FINANCIAL CORP (UMBF) shares for $1,805,791 on Aug 13, 2025
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
J. Mariner Kemper sold 3,960 UMB FINANCIAL CORP (UMBF) shares for $403,128 on Jun 2, 2025
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 3,960 UMB FINANCIAL CORP (UMBF) shares for $403,128 on Jun 2, 2025
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
J. Mariner Kemper sold 2,899 UMB FINANCIAL CORP (UMBF) shares for $314,686 on Feb 21, 2025
Large trade for this person
Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.
J. Mariner Kemper sold 2,899 UMB FINANCIAL CORP (UMBF) shares for $314,686 on Feb 21, 2025
Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.
Reported transactions
Price 0.00 is a real reported figure
on gifts (G) and share awards (A) — not a missing number.
The 25 most recent rows are grouped into 18 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 502 on file in total. See the full history on EDGAR ↗
How to read this listi
Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.
The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.
Shares is the amount
on the form;
value is that amount times the closing price shown. Rows with no closing
price are left blank, so they may add up to less than the headline figure.
What is not counted herei
Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.
Equity positions disclosed to the SEC, with the source filing behind each row.
The filings linked in the tables above are the sources for
every figure on this page.
Think a number here is wrong? Open the linked filing and compare —
how to report it.
Profile record last refreshed Sep 8, 2026.
Logo credits
Logo credits. Logos on this page are shown to identify the company they belong to; trademarks remain the property of their owner. Files whose licence requires naming the author are listed here. Logos in the public domain or released under CC0 are not listed, because those licences ask for nothing.
