BANK OF MARIN BANCORP/CA (BMRC) Top Institutional Shareholders
BANK OF MARIN BANCORP/CA (BMRC) 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 $266.46M in BMRC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of BMRC tracked by InsiderSet, reporting ownership valued at approximately $35.93M 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 $35.96M, representing an estimated gain of +0.08% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 59% of the total disclosed BMRC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Dimensional Fund Advisors Lp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in BANK OF MARIN BANCORP/CA (BMRC).
This page ranks the largest institutional BMRC 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
136
Total Reported Value
$266.46M
Largest Holder
Blackrock, Inc.
Largest Position
$35.93M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
149
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% | 1,401,775 | $35,927,484 | $35,955,529 | +$28,045 | +0.08% | |
| Dimensional Fund Advisors Lp | 0.00% | 802,865 | $20,577,464 | $20,593,487 | +$16,023 | +0.08% | |
| Vanguard Capital Management Llc | 0.00% | 642,672 | $16,471,683 | $16,484,537 | +$12,854 | +0.08% | |
| Alliancebernstein L.P. | 0.01% | 623,046 | $16,205,426 | $15,981,130 | -$224,296 | -1.38% | |
| Wellington Management Group Llp | 0.00% | 632,000 | $16,198,160 | $16,210,800 | +$12,640 | +0.08% | |
| Holdco Asset Management, Lp | 0.96% | 504,411 | $12,928,054 | $12,938,142 | +$10,088 | +0.08% | |
| Manufacturers Life Insurance Company, The | 0.01% | 458,812 | $11,759,352 | $11,768,528 | +$9,176 | +0.08% | |
| Geode Capital Management, Llc | 0.00% | 390,301 | $10,005,759 | $10,011,221 | +$5,462 | +0.05% | |
| Ameriprise Financial Inc | 0.00% | 374,883 | $9,608,252 | $9,615,749 | +$7,497 | +0.08% | |
| State Street Corp | 0.00% | 340,004 | $8,714,303 | $8,721,103 | +$6,800 | +0.08% | |
| Two Sigma Investments, Lp | 0.01% | 266,577 | $6,832,369 | $6,837,700 | +$5,331 | +0.08% | |
| Hotchkis & Wiley Capital Management Llc | 0.02% | 260,596 | $6,679,075 | $6,684,287 | +$5,212 | +0.08% | |
| Heartland Advisors Inc | 0.33% | 250,000 | $6,407,500 | $6,412,500 | +$5,000 | +0.08% | |
| Morgan Stanley | 0.00% | 240,431 | $6,162,262 | $6,167,055 | +$4,793 | +0.08% | |
| Ubs Group Ag | 0.00% | 199,677 | $5,117,722 | $5,121,715 | +$3,993 | +0.08% | |
| Citadel Advisors Llc | 0.00% | 178,753 | $4,581,439 | $4,585,014 | +$3,575 | +0.08% | |
| Charles Schwab Investment Management Inc | 0.00% | 125,385 | $3,213,618 | $3,216,125 | +$2,507 | +0.08% | |
| Northern Trust Corp | 0.00% | 125,178 | $3,208,312 | $3,210,816 | +$2,504 | +0.08% | |
| Kennedy Capital Management Llc | 0.07% | 123,280 | $3,159,666 | $3,162,132 | +$2,466 | +0.08% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 119,392 | $3,060,017 | $3,062,405 | +$2,388 | +0.08% |
| Aqr Capital Management Llc | 0.00% | 117,649 | $3,015,349 | $3,017,697 | +$2,348 | +0.08% | |
| Westmount Partners, Llc | 0.73% | 115,484 | $2,959,855 | $2,962,165 | +$2,310 | +0.08% | |
| Vanguard Portfolio Management Llc | 0.00% | 110,474 | $2,831,449 | $2,833,658 | +$2,209 | +0.08% | |
| Vanguard Fiduciary Trust Co | 0.00% | 106,797 | $2,737,207 | $2,739,343 | +$2,136 | +0.08% | |
| Bank Of Marin | 1.81% | 97,046 | $2,487,288 | $2,489,230 | +$1,942 | +0.08% | |
| Los Angeles Capital Management Llc | 0.01% | 90,412 | $2,317,261 | $2,319,068 | +$1,807 | +0.08% | |
| Prudential Financial Inc | 0.00% | 79,072 | $2,026,615 | $2,028,197 | +$1,582 | +0.08% | |
| Qube Research & Technologies Ltd | 0.00% | 78,090 | $2,001,447 | $2,003,009 | +$1,562 | +0.08% | |
| Bank Of New York Mellon Corp | 0.00% | 77,699 | $1,991,431 | $1,992,979 | +$1,548 | +0.08% | |
| Algebris (Uk) Ltd | 0.14% | 75,315 | $1,927,140 | $1,931,830 | +$4,690 | +0.24% | |
| Goldman Sachs Group Inc | 0.00% | 68,741 | $1,761,820 | $1,763,207 | +$1,387 | +0.08% | |
| Fisher Asset Management, Llc | 0.00% | 63,926 | $1,638,423 | $1,639,702 | +$1,279 | +0.08% | |
| Perigon Wealth Management, Llc | 0.03% | 61,081 | $1,565,506 | $1,566,728 | +$1,222 | +0.08% | |
| Quantinno Capital Management Lp | 0.00% | 59,476 | $1,524,394 | $1,525,559 | +$1,165 | +0.08% | |
| Creative Planning | 0.00% | 56,992 | $1,460,700 | $1,461,845 | +$1,145 | +0.08% | |
| United Capital Financial Advisors, Llc | 0.01% | 50,942 | $1,305,643 | $1,306,662 | +$1,019 | +0.08% | |
| Millennium Management Llc | 0.00% | 46,550 | $1,193,076 | $1,194,008 | +$932 | +0.08% | |
| Jane Street Group, Llc | 0.00% | 42,071 | $1,078,280 | $1,079,121 | +$841 | +0.08% | |
| Fourthstone Llc | 0.18% | 41,834 | $1,072,205 | $1,073,042 | +$837 | +0.08% | |
| Trexquant Investment Lp | 0.01% | 39,957 | $1,024,098 | $1,024,897 | +$799 | +0.08% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 39,224 | $1,005,311 | $1,006,096 | +$785 | +0.08% | |
| American Century Companies Inc | 0.00% | 38,542 | $987,842 | $988,602 | +$760 | +0.08% | |
| D. E. Shaw & Co., Inc. | 0.00% | 37,672 | $965,533 | $966,287 | +$754 | +0.08% | |
| Private Wealth Partners, Llc | 0.07% | 36,983 | $947,874 | $948,614 | +$740 | +0.08% | |
| Nuveen, Llc | 0.00% | 30,324 | $777,204 | $777,811 | +$607 | +0.08% | |
| Rbf Capital, Llc | 0.04% | 30,000 | $768,900 | $769,500 | +$600 | +0.08% | |
| Summerhaven Investment Management, Llc | 0.45% | 28,609 | $733,249 | $733,821 | +$572 | +0.08% | |
| Barclays Plc | 0.00% | 27,388 | $701,954 | $702,502 | +$548 | +0.08% | |
| Bridgeway Capital Management, Llc | 0.01% | 26,024 | $666,995 | $667,516 | +$521 | +0.08% | |
| Bank Of America Corp | 0.00% | 25,590 | $655,872 | $656,384 | +$512 | +0.08% |
Frequently asked questions about BMRC
Who owns the most BMRC stock?
The largest holders of BMRC 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 BANK OF MARIN BANCORP/CA (BMRC).
Is BMRC widely held by superinvestors?
Many widely followed stocks like BMRC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly BMRC 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.