Bank of Marin Bancorp
US ˙ NasdaqGS ˙ US0634251021

SecurityBMRC / Bank of Marin Bancorp
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership802,865 shares
Latest Disclosed Value $ 20,577,464
Dimensional Fund Advisors Lp reports 4.16% increase in ownership of BMRC / Bank of Marin Bancorp

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 802,865 shares of Bank of Marin Bancorp (US:BMRC) valued at $20,577,430 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 770,817 shares of Bank of Marin Bancorp. This represents a change in shares of 4.16% during the quarter. The current value of the position is $20,139,869 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F BANK OF MARIN BANCORP COM 063425102 802,865 32,048 4.16 20,577 2.63 0.0009
2026-02-12 2025-12-31 13F BANK MARIN BANCORP COM 063425102 770,817 -16,767 -2.13 20,049 4.85 0.0042
2025-11-12 2025-09-30 13F BANK MARIN BANCORP COM 063425102 787,584 14,089 1.82 19,123 8.24 0.0041
2025-08-12 2025-06-30 13F BANK MARIN BANCORP COM 063425102 773,495 45,687 6.28 17,667 9.99 0.0041
2025-05-13 2025-03-31 13F BANK MARIN BANCORP COM 063425102 727,808 -6,327 -0.86 16,062 -7.95 0.0040
2025-02-13 2024-12-31 13F BANK MARIN BANCORP COM 063425102 734,135 1,058 0.14 17,450 18.49 0.0042
2024-11-07 2024-09-30 13F BANK MARIN BANCORP COM 063425102 733,077 16,876 2.36 14,727 27.01 0.0036
2024-08-09 2024-06-30 13F BANK MARIN BANCORP COM 063425102 716,201 33,280 4.87 11,595 1.25 0.0030
2024-05-10 2024-03-31 13F BANK MARIN BANCORP COM 063425102 682,921 55,812 8.90 11,453 -17.07 0.0031
2024-02-07 2023-12-31 13F BANK MARIN BANCORP COM 063425102 627,109 46,477 8.00 13,809 30.11 0.0040
2023-11-09 2023-09-30 13F BANK MARIN BANCORP COM 063425102 580,632 -80,868 -12.22 10,614 -9.21 0.0035
2023-08-09 2023-06-30 13F BANK MARIN BANCORP COM 063425102 661,500 -131,029 -16.53 11,689 -32.62 0.0037
2023-05-12 2023-03-31 13F BANK MARIN BANCORP COM 063425102 792,529 29,716 3.90 17,349 69,292.00 0.0058
2023-02-09 2022-12-31 13F BANK MARIN BANCORP COM 063425102 762,813 -5,290 -0.69 25 -99.89 0.0074
2022-11-10 2022-09-30 13F BANK MARIN BANCORP COM 063425102 768,103 23,079 3.10 23,004 -2.84 0.0088
2022-08-12 2022-06-30 13F BANK MARIN BANCORP COM 063425102 745,024 22,351 3.09 23,677 -6.58 0.0085
2022-05-13 2022-03-31 13F BANK MARIN BANCORP COM 063425102 722,673 21,712 3.10 25,344 -2.89 0.0078
2022-02-09 2021-12-31 13F BANK MARIN BANCORP COM 063425102 700,961 -17,153 -2.39 26,097 -3.73 0.0079
2021-11-12 2021-09-30 13F BANK MARIN BANCORP COM 063425102 718,114 182,149 33.99 27,109 58.56 0.0087
2021-08-12 2021-06-30 13F BANK MARIN BANCORP COM 063425102 535,965 26,142 5.13 17,097 -14.72 0.0054
2021-05-14 2021-03-31 13F BANK MARIN BANCORP COM 063425102 509,823 -2,420 -0.47 20,047 13.96 0.0066
2021-03-08 2020-12-31 13F/A-2 BANK MARIN BANCORP COM 063425102 512,243 286 0.06 17,591 18.65 0.0064
2021-02-11 2020-12-31 13F BANK MARIN BANCORP COM 063425102 512,243 286 17,591 6,352.9342
2020-11-12 2020-09-30 13F BANK MARIN BANCORP COM 063425102 511,957 6,989 1.38 14,826 -11.91 0.0063
2020-08-13 2020-06-30 13F BANK OF MARIN BANCORP COM 063425102 504,968 2,300 0.46 16,830 11.60 0.0074
2020-05-14 2020-03-31 13F BANK OF MARIN BANCORP COM 063425102 502,668 2,411 0.48 15,080 -33.09 0.0079
2020-02-14 2019-12-31 13F BANK OF MARIN BANCORP COM 063425102 500,257 -4,371 -0.87 22,537 7.64 0.0082
2019-11-12 2019-09-30 13F BANK OF MARIN BANCORP COM 063425102 504,628 6,963 1.40 20,937 2.56 0.0081
2019-08-13 2019-06-30 13F BANK OF MARIN BANCORP COM 063425102 497,665 22,491 4.73 20,415 5.59 0.0079
2019-08-12 2019-03-31 13F/A-2 BANK OF MARIN BANCORP COM 063425102 475,174 37,692 8.62 19,335 7.17 0.0077
2019-05-10 2019-03-31 13F BANK OF MARIN BANCORP COM 063425102 475,174 37,692 19,335
2019-02-26 2018-12-31 13F/A-1 BANK OF MARIN BANCORP COM 063425102 437,482 234,328 115.35 18,041 5.85 0.0082
2019-02-13 2018-12-31 13F BANK OF MARIN BANCORP COM 063425102 437,482 234,328 18,041
2018-11-13 2018-09-30 13F BANK OF MARIN BANCORP COM 063425102 203,154 12,330 6.46 17,044 10.47 0.0065
2018-08-10 2018-06-30 13F BANK OF MARIN BANCORP COM 063425102 190,824 27,399 16.77 15,428 36.92 0.0062
2018-05-11 2018-03-31 13F BANK OF MARIN BANCORP COM 063425102 163,425 26,488 19.34 11,268 21.01 0.0047
2018-02-12 2017-12-31 13F BANK OF MARIN BANCORP COM 063425102 136,937 25,106 22.45 9,312 21.57 0.0039
2017-11-13 2017-09-30 13F BANK OF MARIN BANCORP COM 063425102 111,831 30,461 37.44 7,660 52.92 0.0033
2017-08-11 2017-06-30 13F BANK OF MARIN BANCORP COM 063425102 81,370 15,587 23.69 5,009 18.33 0.0023
2017-05-12 2017-03-31 13F BANK OF MARIN BANCORP COM 063425102 65,783 3,230 5.16 4,233 -2.98 0.0020
2017-02-09 2016-12-31 13F BANK OF MARIN BANCORP COM 063425102 62,553 9,208 17.26 4,363 64.46 0.0022
2016-11-10 2016-09-30 13F BANK OF MARIN BANCORP COM 063425102 53,345 1,591 3.07 2,653 5.99 0.0014
2016-08-09 2016-06-30 13F BANK OF MARIN BANCORP COM 063425102 51,754 5,699 12.37 2,503 10.41 0.0014
2016-05-13 2016-03-31 13F BANK OF MARIN BANCORP COM 063425102 46,055 7,406 19.16 2,267 9.84 0.0014
2016-02-10 2015-12-31 13F BANK OF MARIN BANCORP COM 063425102 38,649 9,712 33.56 2,064 48.60 0.0013
2015-11-13 2015-09-30 13F BANK OF MARIN BANCORP COM 063425102 28,937 6,009 26.21 1,389 19.13 0.0009
2015-08-14 2015-06-30 13F BANK OF MARIN BANCORP COM 063425102 22,928 6,029 35.68 1,166 35.58 0.0007
2015-05-14 2015-03-31 13F BANK OF MARIN BANCORP COM 063425102 16,899 957 6.00 860 2.63 0.0005
2015-02-06 2014-12-31 13F BANK OF MARIN BANCORP COM 063425102 15,942 -3,943 -19.83 838 -8.21 0.0006
2014-11-13 2014-09-30 13F BANK OF MARIN BANCORP COM 063425102 19,885 0 0.00 913 0.66 0.0006
2014-08-08 2014-06-30 13F BANK OF MARIN BANCORP COM 063425102 19,885 -13,115 -39.74 907 -38.96 0.0006
2014-05-14 2014-03-31 13F BANK OF MARIN BANCORP COM 063425102 33,000 33,000 1,486 0.0011
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.