John Marshall Bancorp, Inc. (JMSB)
JMSB moved a median of 0.00% 30 minutes after news, and +0.08% by the close. How JMSB actually reacts to news — the realized, point-in-time move the market made, measured across 207 labeled events over the last three years with zero look-ahead.
JMSB’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 22% | 138 |
| 30-min | 0.00% | 41% | 174 |
| 60-min | -0.02% | 41% | 180 |
| to close | +0.08% | 55% | 205 |
| Middle 50% of JMSB reactions | 0.00% to +0.96% |
|---|---|
| Median reaction (30-min) | 0.00% |
| Measured reactions | 207 |
Half of all John Marshall Bancorp, Inc. news events land between +0.00% and +0.96% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when JMSB moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to JMSB's baseline. Nothing else.
Recent JMSB events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form S-4/A John Marshall Bancorp, | SEC filing · Form S-4 | SEC EDGAR | +0.63% | -0.26% | |
| Form S-4 John Marshall Bancorp, | SEC filing · Form S-4 | SEC EDGAR | +0.00% | -0.04% | |
| John Marshall Bancorp, Inc. Announces Third Quarter 2026 Earnings Release Date | Press release | Business Wire | +0.33% | -0.39% | |
| Form 8-K John Marshall Bancorp, For: Sep 07 | SEC filing · Form 8-K | SEC EDGAR | +1.83% | +1.87% | |
| JMSB Stock Alert: Halper Sadeh LLC is Investigating Whether John Marshall Bancorp, Inc. is Obtaining a Fair Price for its Shareholders | Press release | Business Wire | -0.28% | -0.30% | |
| John Marshall Bancorp, Inc. and Eagle Financial Services, Inc. Announce Strategic Merger Uniting Two of Virginia’s Leading Community Banks | Press release | Business Wire | +1.83% | +1.87% | |
| Form 8-K John Marshall Bancorp, For: Aug 18 | SEC filing · Form 8-K | SEC EDGAR | +0.73% | -2.06% | |
| John Marshall Bancorp, Inc. Announces Extension of Stock Repurchase Program | Press release | Business Wire | +0.73% | -2.06% | |
| Form 10-Q John Marshall Bancorp, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | +0.13% | |
| Form 8-K John Marshall Bancorp, For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.73% | |
| Form 8-K John Marshall Bancorp, For: Jul 21 | SEC filing · Form 8-K | SEC EDGAR | -5.42% | -3.10% | |
| Form 8-K John Marshall Bancorp, For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | -5.42% | -3.10% | |
| John Marshall Bancorp, Inc. Increases Quarterly Cash Dividend | Press release | Business Wire | -5.42% | -3.10% | |
| John Marshall Bancorp, Inc. Reports Strong Loan Growth and Sustained Net Interest Margin Expansion Drive 1.20% Return on Average Assets and 10.34% Return on Average Equity | Press release | Business Wire | -5.42% | -3.10% | |
| John Marshall Bancorp, Inc. Announces Second Quarter 2026 Earnings Release Date | Press release | Business Wire | +1.27% | -0.04% | |
| Form 8-K John Marshall Bancorp, For: Jun 16 | SEC filing · Form 8-K | SEC EDGAR | -0.57% | -2.47% | |
| Form 10-Q John Marshall Bancorp, For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -0.70% | |
| Form 8-K John Marshall Bancorp, For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.38% | |
| Form 8-K John Marshall Bancorp, For: Apr 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.38% | |
| Form DEF 14A John Marshall Bancorp, For: Jun 16 | SEC filing · Form DEF | SEC EDGAR | +0.00% | -2.38% | |
| Form DEFA14A John Marshall Bancorp, | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -2.38% | |
| John Marshall Bancorp, Inc. Declares Quarterly Cash Dividend | Press release | Business Wire | +0.00% | -2.38% | |
| John Marshall Bancorp, Inc. Reports Continued Net Interest Margin Growth Drives 27% Increase in Net Income - Core Deposits and Loans Expand and Asset Quality Remains Strong | Press release | Business Wire | +0.00% | -2.38% | |
| Form 8-K John Marshall Bancorp, For: Apr 15 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.19% | |
| John Marshall Bancorp, Inc. Announces Initiation of Coverage by Investment Banking Firm | Press release | Business Wire | +0.00% | +0.19% | |
| John Marshall Bancorp, Inc. Announces First Quarter 2026 Earnings Release Date | Press release | Business Wire | — | +1.06% | |
| Form 10-K John Marshall Bancorp, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.00% | -2.15% | |
| John Marshall Bank Hires Matthew Witt as VP, Commercial Lender to Grow and Support Alexandria Market | Press release | Business Wire | +0.00% | +0.62% | |
| Form 8-K John Marshall Bancorp, For: Jan 27 | SEC filing · Form 8-K | SEC EDGAR | +3.00% | -0.10% | |
| Form 8-K John Marshall Bancorp, For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | +3.00% | -0.10% | |
| John Marshall Bancorp, Inc. Initiates Quarterly Cash Dividend | Press release | Business Wire | +3.00% | -0.10% | |
| John Marshall Bancorp, Inc. Reports Strong Loan Demand, Net Interest Margin Growth, and Better Efficiency Drive 42% Annualized Increase in Earnings Per Share | Press release | Business Wire | +3.00% | -0.10% | |
| John Marshall Bank Expands GovCon Team With the Hiring of Pat Dempsey in Tysons | Press release | Business Wire | +0.00% | +0.20% | |
| Form 10-Q John Marshall Bancorp, For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | — | +1.43% | |
| Form 8-K John Marshall Bancorp, For: Oct 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.46% | |
| John Marshall Bancorp, Inc. Reports Continuing Strong Momentum and Growth in Margin, Core Deposits and Loan Demand Drives 28% Increase in Net Income. Asset Quality Remains Pristine. | Press release | Business Wire | +0.00% | -2.46% | |
| John Marshall Bank Hires Charles Kapur as SVP, Director of Deposit Services to Develop and Execute Growth Strategy | Press release | Business Wire | — | +0.94% | |
| Form 8-K John Marshall Bancorp, For: Sep 03 | SEC filing · Form 8-K | SEC EDGAR | -0.05% | +1.20% | |
| Form 8-K John Marshall Bancorp, For: Aug 19 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +1.65% | |
| John Marshall Bancorp, Inc. Announces Extension of Stock Repurchase Program | Press release | Business Wire | +0.00% | +1.65% | |
| Form 10-Q John Marshall Bancorp, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | — | |
| Form 8-K John Marshall Bancorp, For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | — | |
| 10% Annualized Loan Growth Drives 24% Annualized Earnings per Share Growth, Net Interest Margin and Loan Commitments Experience Significant Increases | Press release | Business Wire | — | -0.45% | |
| Form 8-K John Marshall Bancorp, For: Jul 23 | SEC filing · Form 8-K | SEC EDGAR | — | -0.45% | |
| Form S-8 John Marshall Bancorp, | SEC filing · Form S-8 | SEC EDGAR | — | -3.92% | |
| Form 8-K John Marshall Bancorp, For: Jul 21 | SEC filing · Form 8-K | SEC EDGAR | -0.15% | +0.46% | |
| John Marshall Bancorp, Inc. Announces Initiation of Coverage by Investment Banking Firm | Press release | Business Wire | -0.15% | +0.46% | |
| John Marshall Bank Announces Expanded Support for Small Businesses through SBA Express Loan Program | Press release | Business Wire | — | +3.21% | |
| Form 8-K John Marshall Bancorp, For: Jun 17 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +2.72% | |
| Form EFFECT John Marshall Bancorp, | SEC filing · Form EFFECT | SEC EDGAR | +0.00% | +0.85% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the JMSB section they belong to.
Where else JMSB is measured.
JMSB earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Bank of N.T. Butterfield & Son Limited (The) Voting Ordinary Shares (NTB) | 208 | +0.04% | 58% |
| Southern First Bancshares, Inc. (SFST) | 208 | -0.02% | 40% |
| Oppenheimer Holdings, Inc. Class A (DE) (OPY) | 207 | +0.01% | 51% |
| Auburn National Bancorporation, Inc. (AUBN) | 206 | 0.00% | 29% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Financial Services names, measured the same way →
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How the numbers are made.
How is John Marshall Bancorp, Inc.'s median reaction calculated?
Every labeled JMSB news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 207 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 41% of JMSB's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does JMSB's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.