Skip to content
buyWeak cluster of 2

Oscar Leland Mahan bought $13k of JMSB

director at John Marshall Bancorp, Inc.. 712 shares at an average of $18.63, traded Jul 15, 2025, filed Jul 17, 2025.

Conviction score
22
Value
$13k
712 shares
Holdings after
92,901
+1% from before
From 52-week low
+32%
low $13.78, close $18.26
From 52-week high
-28%
high $25.24, as of Jul 15, 2025

Score components

  • Role
    Director
    +15
  • Trade size
    $13k at market
    0
  • Relative to holdings
    Under 1% of holdings (0.8%)
    -5
  • Price context
    28% below the 52-week high
    +4
  • Cluster
    2 insiders buying within 14 days
    +8
  • Repeat buying
    First buy in 90 days
    0
  • Track record
    Too few past buys to judge (1 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -1.4%, 3m -2.3%, 6m +3.7%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

JMSBOct 12, 2026 · close 22.93
Since filing Jul 17, 2025: +20.6%SPY +25.6% · excess -5.0%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001415889-25-019916, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jul 15, 2025POpen-market purchase
Common Stock
+712$18.63$13k92,901Jul 17, 2025

Related signals

Other insiders at John Marshall Bancorp, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
18Weak
JMSBbuy 2
John Marshall Bancorp, Inc.
Philip Chase
director
$3,054
133 shares
+0%
35Weak
JMSBbuy 2
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$54k
2,357 shares
+1%
30Weak
JMSBbuy 2
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$48k
2,300 shares
+1%
18Weak
JMSBbuy 2
John Marshall Bancorp, Inc.
Oscar Leland Mahan
director
$3,764
179 shares
+0%
15Weak
JMSBbuy
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$9,815
500 shares
+0%
20Weak
JMSBbuy
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$26k
1,345 shares
+0%
19Weak
JMSBbuy
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$9,450
500 shares
+0%
19Weak
JMSBbuy
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$23k
1,200 shares
+0%
14Weak
JMSBbuy
John Marshall Bancorp, Inc.
Jonathan Craig Kinney
director
$9,425
500 shares
+0%
46Moderate
JMSBbuy 2
John Marshall Bancorp, Inc.
Kent Carstater
CHIEF FINANCIAL OFFICER
$92k
5,000 shares
+10%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Oscar Leland Mahan bought $13k of JMSB | InsiderTell