JOHN MARSHALL BANCORP INC (JMSB) Top Institutional Shareholders
JOHN MARSHALL BANCORP INC (JMSB) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $98.77M in JMSB holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of JMSB tracked by InsiderSet, reporting ownership valued at approximately $17.75M in its March 31, 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 $18.65M, representing an estimated gain of +5.03% 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 Blackrock, Inc., Vanguard Capital Management Llc, Fj 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
75
Total Reported Value
$98.77M
Largest Holder
Blackrock, Inc.
Largest Position
$17.75M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
80
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 875,363 | $17,752,363 | $18,645,232 | +$892,869 | +5.03% | |
| Vanguard Capital Management Llc | 0.00% | 537,376 | $10,897,985 | $11,446,109 | +$548,124 | +5.03% | |
| Fj Capital Management Llc | 0.94% | 412,273 | $8,360,896 | $8,781,415 | +$420,519 | +5.03% | |
| Toth Financial Advisory Corp | 0.82% | 368,621 | $7,475,639 | $7,851,627 | +$375,988 | +5.03% | |
| Evermay Wealth Management Llc | 0.79% | 349,969 | $7,097,372 | $7,454,340 | +$356,968 | +5.03% | |
| Geode Capital Management, Llc | 0.00% | 295,304 | $5,990,200 | $6,289,975 | +$299,775 | +5.00% | |
| State Street Corp | 0.00% | 217,398 | $4,408,831 | $4,630,577 | +$221,746 | +5.03% | |
| Bank Of America Corp | 0.00% | 206,711 | $4,192,099 | $4,402,944 | +$210,845 | +5.03% | |
| Mai Capital Management | 0.02% | 198,116 | $4,017,793 | $4,219,871 | +$202,078 | +5.03% | |
| Rhino Investment Partners, Inc | 0.67% | 118,580 | $2,404,802 | $2,525,754 | +$120,952 | +5.03% | |
| Brown Advisory Inc | 0.00% | 108,342 | $2,197,176 | $2,307,685 | +$110,509 | +5.03% | |
| Fourthstone Llc | 0.37% | 108,178 | $2,193,850 | $2,304,191 | +$110,341 | +5.03% | |
| Elizabeth Park Capital Advisors, Ltd. | 1.64% | 105,339 | $2,136,275 | $2,243,721 | +$107,446 | +5.03% | |
| Cresset Asset Management, Llc | 0.01% | 104,495 | $2,119,150 | $2,225,744 | +$106,594 | +5.03% | |
| Northern Trust Corp | 0.00% | 99,522 | $2,018,307 | $2,119,819 | +$101,512 | +5.03% | |
| Vanguard Fiduciary Trust Co | 0.00% | 79,508 | $1,612,422 | $1,693,520 | +$81,098 | +5.03% | |
| Vanguard Portfolio Management Llc | 0.00% | 72,885 | $1,478,108 | $1,552,451 | +$74,343 | +5.03% | |
| Wealthspire Advisors, Llc | 0.01% | 64,141 | $1,300,775 | $1,366,203 | +$65,428 | +5.03% | |
| Meridian Financial Partners Llc | 0.45% | 57,619 | $1,181,766 | $1,227,285 | +$45,519 | +3.85% | |
| Charles Schwab Investment Management Inc | 0.00% | 36,597 | $742,187 | $779,516 | +$37,329 | +5.03% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 31,600 | $640,848 | $673,080 | +$32,232 | +5.03% |
| Marshall Wace, Llp | 0.00% | 31,472 | $638,251 | $670,354 | +$32,103 | +5.03% | |
| Goldman Sachs Group Inc | 0.00% | 31,402 | $636,832 | $668,863 | +$32,031 | +5.03% | |
| Bank Of New York Mellon Corp | 0.00% | 31,207 | $632,878 | $664,709 | +$31,831 | +5.03% | |
| Nuveen, Llc | 0.00% | 28,488 | $577,737 | $606,794 | +$29,057 | +5.03% | |
| Quantinno Capital Management Lp | 0.00% | 25,245 | $511,969 | $537,719 | +$25,750 | +5.03% | |
| Advisory Services Network, Llc | 0.01% | 24,719 | $501,301 | $526,515 | +$25,214 | +5.03% | |
| Aqr Capital Management Llc | 0.00% | 21,760 | $441,292 | $463,488 | +$22,196 | +5.03% | |
| Morgan Stanley | 0.00% | 21,299 | $431,944 | $453,669 | +$21,725 | +5.03% | |
| Snowden Capital Advisors Llc | 0.01% | 21,017 | $426,225 | $447,662 | +$21,437 | +5.03% | |
| Royal Bank Of Canada | 0.00% | 20,843 | $423,000 | $443,956 | +$20,956 | +4.95% | |
| Citadel Advisors Llc | 0.00% | 20,385 | $413,408 | $434,201 | +$20,793 | +5.03% | |
| Mariner, Llc | 0.00% | 16,672 | $338,109 | $355,114 | +$17,005 | +5.03% | |
| Rhumbline Advisers | 0.00% | 16,632 | $337,289 | $354,262 | +$16,973 | +5.03% | |
| Kfa Private Wealth Group, Llc | 0.07% | 14,865 | $301,462 | $316,625 | +$15,163 | +5.03% | |
| Ubs Group Ag | 0.00% | 11,042 | $223,932 | $235,195 | +$11,263 | +5.03% | |
| Jane Street Group, Llc | 0.00% | 10,986 | $222,797 | $234,002 | +$11,205 | +5.03% | |
| Osaic Holdings, Inc. | 0.00% | 10,411 | $211,135 | $221,754 | +$10,619 | +5.03% | |
| Deutsche Bank Ag\ | 0.00% | 9,589 | $194,465 | $204,246 | +$9,781 | +5.03% | |
| Wells Fargo & Company/Mn | 0.00% | 7,720 | $156,554 | $164,436 | +$7,882 | +5.03% | |
| Metlife Investment Management, Llc | 0.00% | 7,245 | $146,929 | $154,319 | +$7,390 | +5.03% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 6,020 | $122,086 | $128,226 | +$6,140 | +5.03% | |
| New York State Common Retirement Fund | 0.00% | 4,667 | $94,647 | $99,407 | +$4,760 | +5.03% | |
| Vanguard Global Advisers, Llc | 0.00% | 4,234 | $85,866 | $90,184 | +$4,318 | +5.03% | |
| Atlantic Union Bankshares Corp | 0.00% | 3,375 | $68,445 | $71,888 | +$3,443 | +5.03% | |
| Barclays Plc | 0.00% | 3,370 | $68,343 | $71,781 | +$3,438 | +5.03% | |
| Police & Firemen'S Retirement System Of New Jersey | 0.00% | 2,480 | $50,294 | $52,824 | +$2,530 | +5.03% | |
| T. Rowe Price Investment Management, Inc. | 0.03% | 1,965,531 | $39,861 | $41,865,810 | +$41,825,949 | +104929.50% | |
| Tower Research Capital Llc (Trc) | 0.00% | 1,748 | $35,449 | $37,232 | +$1,783 | +5.03% | |
| Eversource Wealth Advisors, Llc | 0.00% | 1,352 | $34,741 | $28,798 | -$5,943 | -17.11% |
Frequently asked questions about JMSB
Who owns the most JMSB stock?
The largest holders of JMSB are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for JOHN MARSHALL BANCORP INC (JMSB).
Is JMSB widely held by superinvestors?
Many widely followed stocks like JMSB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly JMSB is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.