Oscar Leland Mahan - 03 Jun 2026 Form 4 Insider Report for John Marshall Bancorp, Inc. (JMSB)

Reporting relationship: Director
Issuer ticker: JMSB
Reported as of: 03 Jun 2026
Net transaction value: +$3,764
SEC form: 4
Accepted by SEC: 05 Jun 2026, 13:59:15 UTC
Prior SEC filing: 18 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ Jacob A. Gruninger, Attorney-in-Fact

Key filing fact

Oscar Leland Mahan filed Form 4 for John Marshall Bancorp, Inc. (JMSB) on 05 Jun 2026.

Key facts

This page summarizes Oscar Leland Mahan's Form 4 filing for John Marshall Bancorp, Inc. (JMSB).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Jun 2026, 13:59.

Change

Previous filing in this sequence was filed on 18 Dec 2025.
Current net transaction value: +$3,764.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001898828 Primary reporting owner

Mahan Oscar Leland

Relationship: Director
Address: 1943 ISAAC NEWTON SQUARE EAST, SUITE 100, RESTON
Signature: /s/ Jacob A. Gruninger, Attorney-in-Fact
Signature date: 05 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

JMSB transaction

Common Stock

Purchase

Transaction value: $3,764
Shares: +179
Change %: +0.19%
Price: $21.03
Shares after: 94,981
Date: 03 Jun 2026
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Reinvestment of cash dividends.

Footnote F2

Includes 2,706 shares relating to unvested restricted stock awards issuable upon vesting.

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