Insider Transactions Reported by 16 Insiders of John Marshall Bancorp, Inc.

Symbol: JMSB on Nasdaq
Location: Reston, VA

Key facts

JMSB - John Marshall Bancorp, Inc. has 16 insiders with reported activity on this page.
Net insider value flow over the last year: +$499,178.
Recent transaction rows are available for direct filing-level review.

Change

Buy value: $499,178; sell value: $0.
Net share flow: +26,596.

Research use

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$499,178.

Buys

$499,178

Shares: 26,596

Insiders: 4

Sells

Shares: 0

Insiders: 0

Net

+$499,178

Shares: +26,596

Insiders: 4

Window (months)	Buy shares	Buy $	Sell $	Net $
0-3	0	$0	$0	$0
3-6	1,845	$35,818	$0	+$35,818
6-9	2,200	$41,420	$0	+$41,420
9-12	22,551	$421,940	$0	+$421,940

Top shareholders of John Marshall Bancorp, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with the largest verified stakes, then open the linked filing trail.

13F 13D/G 3/4/5

Lead reported holder

T. Rowe Price Investment Management, Inc.

14% from 13D/G

Large-stake signal

T. Rowe Price Investment Management, Inc.

13D/G evidence reports 14%

Evidence coverage

50 holder rows

Latest evidence as of 31 Mar 2026.

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
T. Rowe Price Investment Management, Inc.	13F 13D/G Company 13F 13D/G	14% from 13D/G	$39,861,000 1,965,531 shares	—	31 Mar 2026
Jonathan Craig Kinney	3/4/5 Director 3/4/5	4.3%	$11,606,986 610,894 shares	+$126,865	16 Dec 2025
Foster Michael T.	3/4/5 Director 3/4/5	2.4%	$6,413,887 337,573 shares	—	16 Dec 2025
Philip W. Allin	3/4/5 Director 3/4/5	1.3%	$3,557,047 187,213 shares	—	16 Dec 2025
Philip Chase	3/4/5 Director 3/4/5	0.76%	$2,036,705 107,195 shares	—	16 Dec 2025
Oscar Leland Mahan	3/4/5 Director 3/4/5	0.67%	$1,801,238 94,802 shares	+$13,265	16 Dec 2025
Christopher W. Bergstrom	3/4/5 CHIEF EXECUTIVE OFFICER, Director 3/4/5	0.53%	$1,422,473 74,867 shares	—	16 Dec 2025
Subhash Garg	3/4/5 Director 3/4/5	0.51%	$1,374,422 72,338 shares	—	16 Dec 2025
Kent Carstater	3/4/5 CHIEF FINANCIAL OFFICER 3/4/5	0.4%	$1,068,161 56,219 shares	+$92,156	16 Dec 2025
Michael A. Garcia	3/4/5 Director 3/4/5	0.26%	$689,187 36,273 shares	+$252,918	16 Dec 2025
Andrew Peden	3/4/5 CHIEF BANKING OFFICER 3/4/5	0.19%	$567,587 26,560 shares	—	16 Dec 2025
Kelly Jo Bell	3/4/5 CHIEF OPERATING OFFICER 3/4/5	0.01%	$28,472 1,333 shares	—	19 Dec 2025
BlackRock, Inc.	13F Company 13F	6.2%	$17,752,363 875,363 shares	—	31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC	13F Company 13F	3.8%	$10,897,985 537,376 shares	—	31 Mar 2026
FJ Capital Management LLC	13F Company 13F	2.9%	$8,360,896 412,273 shares	—	31 Mar 2026
TOTH FINANCIAL ADVISORY CORP	13F Company 13F	2.6%	$7,475,639 368,621 shares	—	31 Mar 2026
EVERMAY WEALTH MANAGEMENT LLC	13F Company 13F	2.5%	$7,097,372 349,969 shares	—	31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	2.1%	$5,990,200 295,304 shares	—	31 Mar 2026
STATE STREET CORP	13F Company 13F	1.5%	$4,408,831 217,398 shares	—	31 Mar 2026
BANK OF AMERICA CORP /DE/	13F Company 13F	1.5%	$4,192,099 206,711 shares	—	31 Mar 2026
MAI Capital Management	13F Company 13F	1.4%	$4,017,793 198,116 shares	—	31 Mar 2026
Rhino Investment Partners, Inc	13F Company 13F	0.84%	$2,404,802 118,580 shares	—	31 Mar 2026
BROWN ADVISORY INC	13F Company 13F	0.76%	$2,197,176 108,342 shares	—	31 Mar 2026
Fourthstone LLC	13F Company 13F	0.76%	$2,193,850 108,178 shares	—	31 Mar 2026
Elizabeth Park Capital Advisors, Ltd.	13F Company 13F	0.74%	$2,136,275 105,339 shares	—	31 Mar 2026
Cresset Asset Management, LLC	13F Company 13F	0.74%	$2,119,150 104,495 shares	—	31 Mar 2026
NORTHERN TRUST CORP	13F Company 13F	0.7%	$2,018,307 99,522 shares	—	31 Mar 2026
VANGUARD FIDUCIARY TRUST CO	13F Company 13F	0.56%	$1,612,422 79,508 shares	—	31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13F Company 13F	0.51%	$1,478,108 72,885 shares	—	31 Mar 2026
Wealthspire Advisors, LLC	13F Company 13F	0.45%	$1,300,775 64,141 shares	—	31 Mar 2026
Meridian Financial Partners LLC	13F Company 13F	0.41%	$1,181,766 57,619 shares	—	31 Mar 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.26%	$742,187 36,597 shares	—	31 Mar 2026
RENAISSANCE TECHNOLOGIES LLC	13F Company 13F	0.22%	$640,848 31,600 shares	—	31 Mar 2026
MARSHALL WACE, LLP	13F Company 13F	0.22%	$638,251 31,472 shares	—	31 Mar 2026
GOLDMAN SACHS GROUP INC	13F Company 13F	0.22%	$636,832 31,402 shares	—	31 Mar 2026
Bank of New York Mellon Corp	13F Company 13F	0.22%	$632,878 31,207 shares	—	31 Mar 2026
Nuveen, LLC	13F Company 13F	0.2%	$577,737 28,488 shares	—	31 Mar 2026
Quantinno Capital Management LP	13F Company 13F	0.18%	$511,969 25,245 shares	—	31 Mar 2026
Advisory Services Network, LLC	13F Company 13F	0.17%	$501,301 24,719 shares	—	31 Mar 2026
ACADIAN ASSET MANAGEMENT LLC	13F Company 13F	0.16%	$459,000 22,713 shares	—	31 Mar 2026
AQR CAPITAL MANAGEMENT LLC	13F Company 13F	0.15%	$441,292 21,760 shares	—	31 Mar 2026
MORGAN STANLEY	13F Company 13F	0.15%	$431,944 21,299 shares	—	31 Mar 2026
Snowden Capital Advisors LLC	13F Company 13F	0.15%	$426,225 21,017 shares	—	31 Mar 2026
ROYAL BANK OF CANADA	13F Company 13F	0.15%	$423,000 20,834 shares	—	31 Mar 2026
CITADEL ADVISORS LLC	13F Company 13F	0.14%	$413,408 20,385 shares	—	31 Mar 2026
Mariner, LLC	13F Company 13F	0.12%	$338,109 16,672 shares	—	31 Mar 2026
RHUMBLINE ADVISERS	13F Company 13F	0.12%	$337,289 16,632 shares	—	31 Mar 2026
KFA Private Wealth Group, LLC	13F Company 13F	0.1%	$301,462 14,865 shares	—	31 Mar 2026
GSA CAPITAL PARTNERS LLP	13F Company 13F	0.09%	$258,000 12,706 shares	—	31 Mar 2026
UBS Group AG	13F Company 13F	0.08%	$223,932 11,042 shares	—	31 Mar 2026

John Marshall Bancorp, Inc. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Jonathan Craig Kinney	Director	$11,606,986	+$126,865	+1.1%	Mixed	16 Dec 2025
Jean Edelman	Director	$7,555,086			Mixed	26 Apr 2022
Foster Michael T.	Director	$6,413,887			Mixed	16 Dec 2025
Ronald J. Gordon	Director	$3,557,266			Mixed	20 Dec 2022
Philip W. Allin	Director	$3,557,047			Mixed	16 Dec 2025
William Ridenour	Chief Banking Officer	$3,112,152			Mixed	26 Apr 2022
Philip Chase	Director	$2,036,705			Mixed	16 Dec 2025
Carl E. Dodson	Chief Operating Officer & Cro	$1,821,250			Mixed	27 May 2022
Oscar Leland Mahan	Director	$1,801,238	+$13,265	+0.74%	Mixed	16 Dec 2025
Lim Nguonly	Director	$1,481,867			Mixed	17 Dec 2024
Christopher W. Bergstrom	CHIEF EXECUTIVE OFFICER, Director	$1,422,473			Mixed	16 Dec 2025
Subhash Garg	Director	$1,374,422			Mixed	16 Dec 2025
Kent Carstater	Chief Financial Officer	$1,068,161	+$92,156	+9.4%	Mixed	16 Dec 2025
Michael A. Garcia	Director	$689,187	+$252,918	+58%	Mixed	16 Dec 2025
Andrew Peden	Chief Banking Officer	$567,587			Mixed	16 Dec 2025
Kelly Jo Bell	Chief Operating Officer	$28,472			Mixed	19 Dec 2025

Recent Insider Transactions by Companies or Individuals for John Marshall Bancorp, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
Kelly Jo Bell	JMSB	Common Stock	Tax liability	-2.7%			-37	1,333	19 Dec 2025	Direct
Kelly Jo Bell	JMSB	Common Stock	Tax liability	-2%			-28	1,370	17 Dec 2025	Direct
Andrew Peden	JMSB	Common Stock	Tax liability	-0.73%			-194	26,560	17 Dec 2025	Direct
Foster Michael T.	JMSB	Common Stock	Award	0.57%			1,901	337,573	16 Dec 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Award	0.66%			2,138	327,790	16 Dec 2025	Direct
Oscar Leland Mahan	JMSB	Common Stock	Award	2.05%			1,901	94,802	16 Dec 2025	Direct
Subhash Garg	JMSB	Common Stock	Award	4.49%			1,901	44,213	16 Dec 2025	Direct
Michael A. Garcia	JMSB	Common Stock	Award	5.53%			1,901	36,273	16 Dec 2025	Direct
Philip W. Allin	JMSB	Common Stock	Award	6.77%			1,901	29,963	16 Dec 2025	Direct
Philip Chase	JMSB	Common Stock	Award	6.26%			1,901	32,275	16 Dec 2025	Direct
Andrew Peden	JMSB	Common Stock	Award	9.75%			2,376	26,754	16 Dec 2025	Direct
Kent Carstater	JMSB	Common Stock	Award	5.81%			3,088	56,219	16 Dec 2025	Direct
Christopher W. Bergstrom	JMSB	Common Stock	Award	14.5%			9,502	74,867	16 Dec 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.15%	$9,815	$19.63	500	325,652	05 Dec 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.42%	$26,003	$19.33	1,345	325,152	02 Dec 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.15%	$9,450	$18.90	500	323,807	06 Nov 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.25%	$14,965	$18.71	800	323,307	05 Nov 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.12%	$7,580	$18.95	400	322,507	04 Nov 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.16%	$9,425	$18.85	500	322,107	31 Oct 2025	Direct
Kent Carstater	JMSB	Common Stock	Purchase	10.4%	$92,156	$18.43	5,000	53,131	31 Jul 2025	Direct
Michael A. Garcia	JMSB	Common Stock	Purchase	21.8%	$118,310	$19.20	6,162	34,372	30 Jul 2025	Direct
Michael A. Garcia	JMSB	Common Stock	Purchase	17.9%	$82,099	$19.20	4,276	28,210	29 Jul 2025	Direct
Michael A. Garcia	JMSB	Common Stock	Purchase	13%	$52,508	$19.11	2,747	23,934	28 Jul 2025	Direct
Oscar Leland Mahan	JMSB	Common Stock	Purchase	0.77%	$13,265	$18.63	712	92,901	15 Jul 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.22%	$12,152	$17.36	700	321,607	12 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.06%	$3,516	$17.58	200	320,907	11 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.08%	$4,425	$17.70	250	320,707	06 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.28%	$15,545	$17.27	900	320,457	05 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.06%	$3,564	$17.47	204	319,557	03 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.05%	$2,631	$17.31	152	319,353	02 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.09%	$5,232	$17.44	300	319,201	02 Jun 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.05%	$2,562	$17.31	148	318,901	30 May 2025	Direct
Jonathan Craig Kinney	JMSB	Common Stock	Purchase	0.25%	$13,975	$17.47	800	318,753	28 May 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.