JMSB Institutional Ownership & Shareholders
JOHN MARSHALL BANCORP INC (JMSB) is currently held by 93 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $153.03M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
T. Rowe Price Investment Management, Inc. is currently the largest disclosed institutional shareholder of JMSB tracked by InsiderSet, reporting ownership valued at approximately $42.85M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $45.09M, representing an estimated gain of +5.23% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 74% of the total disclosed JMSB value among the investors covered in this analysis. Major shareholders include T. Rowe Price Investment Management, Inc., Blackrock, Inc., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in JOHN MARSHALL BANCORP INC (JMSB).
This page ranks the largest institutional JMSB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
93
Total Reported Value
$153.03M
Largest Holder
T. Rowe Price Investment Management, Inc.
Largest Position
$42.85M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
103
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 0.03% | 1,965,531 | $42,849,000 | $45,089,281 | +$2,240,281 | +5.23% | |
| Blackrock, Inc. | 0.00% | 984,411 | $21,460,159 | $22,582,388 | +$1,122,229 | +5.23% | |
| Vanguard Capital Management Llc | 0.00% | 534,570 | $11,653,626 | $12,263,036 | +$609,410 | +5.23% | |
| Toth Financial Advisory Corp | 0.82% | 360,042 | $8,176,556 | $8,259,363 | +$82,807 | +1.01% | |
| Evermay Wealth Management Llc | 0.79% | 351,149 | $7,655,049 | $8,055,358 | +$400,309 | +5.23% | |
| Geode Capital Management, Llc | 0.00% | 316,184 | $6,894,460 | $7,253,261 | +$358,801 | +5.20% | |
| State Street Corp | 0.00% | 218,522 | $4,763,780 | $5,012,895 | +$249,115 | +5.23% | |
| Bank Of America Corp | 0.00% | 178,112 | $3,882,841 | $4,085,889 | +$203,048 | +5.23% | |
| Mai Capital Management | 0.01% | 133,192 | $2,903,586 | $3,055,424 | +$151,838 | +5.23% | |
| Brown Advisory Inc | 0.00% | 108,342 | $2,361,856 | $2,485,365 | +$123,509 | +5.23% | |
| Elizabeth Park Capital Advisors, Ltd. | 1.59% | 105,339 | $2,296,390 | $2,416,477 | +$120,087 | +5.23% | |
| Cresset Asset Management, Llc | 0.01% | 104,494 | $2,277,981 | $2,397,092 | +$119,111 | +5.23% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 103,700 | $2,260,660 | $2,378,878 | +$118,218 | +5.23% |
| Northern Trust Corp | 0.00% | 99,995 | $2,179,892 | $2,293,885 | +$113,993 | +5.23% | |
| Marshall Wace, Llp | 0.00% | 98,090 | $2,138,361 | $2,250,185 | +$111,824 | +5.23% | |
| Acadian Asset Management Llc | 0.00% | 91,906 | $1,995,000 | $2,108,324 | +$113,324 | +5.68% | |
| Mackenzie Financial Corp | 0.00% | 88,203 | $1,922,825 | $2,023,377 | +$100,552 | +5.23% | |
| Vanguard Portfolio Management Llc | 0.00% | 84,517 | $1,842,471 | $1,938,820 | +$96,349 | +5.23% | |
| Vanguard Fiduciary Trust Co | 0.00% | 82,862 | $1,806,392 | $1,900,854 | +$94,462 | +5.23% | |
| Wealthspire Advisors, Llc | 0.01% | 64,333 | $1,402,451 | $1,475,799 | +$73,348 | +5.23% | |
| Meridian Financial Partners Llc | 0.43% | 57,619 | $1,313,137 | $1,321,780 | +$8,643 | +0.66% | |
| Goldman Sachs Group Inc | 0.00% | 55,470 | $1,209,246 | $1,272,482 | +$63,236 | +5.23% | |
| Citadel Advisors Llc | 0.00% | 46,416 | $1,011,868 | $1,064,783 | +$52,915 | +5.23% | |
| Quantinno Capital Management Lp | 0.00% | 45,500 | $991,900 | $1,043,770 | +$51,870 | +5.23% | |
| Selective Wealth Management, Inc. | 0.22% | 41,103 | $936,737 | $942,903 | +$6,166 | +0.66% | |
| Aqr Capital Management Llc | 0.00% | 42,222 | $920,437 | $968,573 | +$48,136 | +5.23% | |
| Charles Schwab Investment Management Inc | 0.00% | 38,463 | $838,493 | $882,341 | +$43,848 | +5.23% | |
| Morgan Stanley | 0.00% | 36,244 | $790,119 | $831,437 | +$41,318 | +5.23% | |
| Bank Of New York Mellon Corp | 0.00% | 33,954 | $740,196 | $778,905 | +$38,709 | +5.23% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 30,689 | $669,020 | $704,006 | +$34,986 | +5.23% | |
| Nuveen, Llc | 0.00% | 28,908 | $630,194 | $663,150 | +$32,956 | +5.23% | |
| Millennium Management Llc | 0.00% | 27,586 | $601,375 | $632,823 | +$31,448 | +5.23% | |
| Trexquant Investment Lp | 0.00% | 24,310 | $529,958 | $557,671 | +$27,713 | +5.23% | |
| Dimensional Fund Advisors Lp | 0.00% | 24,221 | $528,069 | $555,630 | +$27,561 | +5.22% | |
| Royal Bank Of Canada | 0.00% | 22,461 | $490,000 | $515,255 | +$25,255 | +5.15% | |
| Advisory Services Network, Llc | 0.01% | 21,550 | $469,790 | $494,357 | +$24,567 | +5.23% | |
| Newedge Advisors, Llc | 0.00% | 21,086 | $459,676 | $483,713 | +$24,037 | +5.23% | |
| Snowden Capital Advisors Llc | 0.01% | 21,016 | $458,149 | $482,107 | +$23,958 | +5.23% | |
| Mariner, Llc | 0.00% | 17,836 | $388,826 | $409,158 | +$20,332 | +5.23% | |
| Man Group Plc | 0.00% | 16,796 | $366,153 | $385,300 | +$19,147 | +5.23% | |
| Rhumbline Advisers | 0.00% | 15,590 | $339,858 | $357,635 | +$17,777 | +5.23% | |
| Blue Edge Capital, Llc | 0.04% | 15,500 | $337,900 | $355,570 | +$17,670 | +5.23% | |
| Kfa Private Wealth Group, Llc | 0.08% | 14,865 | $337,584 | $341,003 | +$3,419 | +1.01% | |
| Gsa Capital Partners Llp | 0.02% | 14,985 | $327,000 | $343,756 | +$16,756 | +5.12% | |
| Raymond James Financial Inc | 0.00% | 14,631 | $318,955 | $335,635 | +$16,680 | +5.23% | |
| Xtx Topco Ltd | 0.00% | 14,077 | $306,879 | $322,926 | +$16,047 | +5.23% | |
| Sg Americas Securities, Llc | 0.00% | 13,898 | $303,000 | $318,820 | +$15,820 | +5.22% | |
| Wells Fargo & Company/Mn | 0.00% | 13,505 | $294,412 | $309,805 | +$15,393 | +5.23% | |
| Lido Advisors, Llc | 0.00% | 12,505 | $272,609 | $286,865 | +$14,256 | +5.23% | |
| Deutsche Bank Ag\ | 0.00% | 11,005 | $239,909 | $252,455 | +$12,546 | +5.23% |
Frequently asked questions about JMSB
Who are the largest institutional holders of JMSB?
The largest institutional holders of JMSB reported in the latest SEC Form 13F filings include T. Rowe Price Investment Management, Inc., Blackrock, Inc., Vanguard Capital Management Llc, Toth Financial Advisory Corp, and Evermay Wealth Management Llc. InsiderSet ranks institutional holders by their latest reported JMSB position.
What is JMSB institutional ownership?
This page tracks JMSB positions reported by institutional investment managers through SEC Form 13F. JOHN MARSHALL BANCORP INC (JMSB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own JMSB?
InsiderSet currently tracks 93 institutional managers reporting JMSB holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of JMSB shareholders.
How much JMSB stock do institutions own?
Institutional investment managers disclosed approximately $153.03M in JMSB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was JMSB institutional ownership last updated?
The latest JMSB institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional JMSB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its JMSB position after the reporting date.
Are institutions buying or selling JMSB?
Institutional buying and selling can be analyzed by comparing JMSB positions across consecutive 13F reporting periods. InsiderSet's JMSB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View JMSB ownership changes.
How has JMSB institutional ownership changed over time?
InsiderSet tracks JMSB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.