Bank of Marin Bancorp
US ˙ NasdaqGS ˙ US0634251021

SecurityBMRC / Bank of Marin Bancorp
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Parallel Advisors, LLC ownership in BMRC / Bank of Marin Bancorp

On May 7, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 0 shares of Bank of Marin Bancorp (US:BMRC) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 3,109 shares of Bank of Marin Bancorp. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (BMRC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

BMRC / Bank of Marin Bancorp Historical Put/Call Ratio
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 MARIN BANCORP Stock 063425102 0 -3,109 -100.00 0 -100.00
2026-02-11 2025-12-31 13F BANK MARIN BANCORP Stock 063425102 3,109 0 0.00 81 6.67 0.0015
2025-11-13 2025-09-30 13F BANK MARIN BANCORP Stock 063425102 3,109 0 0.00 75 5.63 0.0014
2025-07-08 2025-06-30 13F BANK MARIN BANCORP Stock 063425102 3,109 59 1.93 71 5.97 0.0014
2025-04-08 2025-03-31 13F BANK MARIN BANCORP Stock 063425102 3,050 43 1.43 67 -5.63 0.0015
2025-02-10 2024-12-31 13F BANK MARIN BANCORP Stock 063425102 3,007 0 0.00 71 18.33 0.0016
2024-11-13 2024-09-30 13F BANK MARIN BANCORP Stock 063425102 3,007 0 0.00 60 25.00 0.0014
2024-08-08 2024-06-30 13F BANK MARIN BANCORP Stock 063425102 3,007 -2,300 -43.34 49 -45.45 0.0012
2024-05-06 2024-03-31 13F BANK MARIN BANCORP Stock 063425102 5,307 0 0.00 89 -24.14 0.0024
2024-02-12 2023-12-31 13F BANK MARIN BANCORP Stock 063425102 5,307 -436 -7.59 117 11.54 0.0035
2024-05-20 2023-09-30 13F/A-1 BANK MARIN BANCORP Stock 063425102 5,743 383 7.15 105 10.64 0.0035
2023-11-14 2023-09-30 13F BANK MARIN BANCORP Stock 063425102 5,743 383 105 0.0035
2024-05-20 2023-06-30 13F/A-1 BANK MARIN BANCORP Stock 063425102 5,360 -649 -10.80 95 -28.24 0.0030
2023-08-04 2023-06-30 13F BANK MARIN BANCORP Stock 063425102 5,360 -649 95 0.0030
2024-05-20 2023-03-31 13F/A-1 BANK MARIN BANCORP Stock 063425102 6,009 560 10.28 132 -26.82 0.0044
2023-04-25 2023-03-31 13F BANK MARIN BANCORP Stock 063425102 6,009 560 132 0.0044
2023-02-06 2022-12-31 13F BANK MARIN BANCORP Stock 063425102 5,449 -2,000 -26.85 179 -19.73 0.0078
2022-11-10 2022-09-30 13F BANK MARIN BANCORP Stock 063425102 7,449 -966 -11.48 223 -16.48 0.0103
2022-08-01 2022-06-30 13F BANK MARIN BANCORP Stock 063425102 8,415 28 0.33 267 -8.56 0.0123
2022-04-28 2022-03-31 13F BANK MARIN BANCORP Stock 063425102 8,387 -525 -5.89 292 -12.05 0.0116
2022-01-20 2021-12-31 13F BANK MARIN BANCORP Stock 063425102 8,912 -10,500 -54.09 332 -54.71 0.0123
2021-11-02 2021-09-30 13F/A-1 BANK MARIN BANCORP Stock 063425102 19,412 -500 -2.51 733 15.43 0.0296
2021-08-06 2021-06-30 13F BANK MARIN BANCORP Stock 063425102 19,912 0 0.00 635 -18.59 0.0269
2021-04-23 2021-03-31 13F BANK MARIN BANCORP Stock 063425102 19,912 -5,300 -21.02 780 -9.93 0.0368
2021-02-02 2020-12-31 13F BANK MARIN BANCORP Stock 063425102 25,212 -2,500 -9.02 866 7.85 0.0470
2020-10-27 2020-09-30 13F BANK MARIN BANCORP Stock 063425102 27,712 0 0.00 803 -13.00 0.0497
2020-07-16 2020-06-30 13F BANK MARIN BANCORP Stock 063425102 27,712 0 0.00 923 11.07 0.0602
2020-04-27 2020-03-31 13F BANK MARIN BANCORP Stock 063425102 27,712 0 0.00 831 -33.41 0.0673
2020-01-30 2019-12-31 13F BANK MARIN BANCORP Stock 063425102 27,712 0 0.00 1,248 8.52 0.0936
2019-11-01 2019-09-30 13F BANK MARIN BANCORP Stock 063425102 27,712 0 0.00 1,150 1.14 0.0985
2019-08-05 2019-06-30 13F BANK MARIN BANCORP Stock 063425102 27,712 27,412 9,137.33 1,137 9,375.00 0.1109
2019-05-01 2019-03-31 13F BANK MARIN BANCORP Stock 063425102 300 0 0.00 12 0.00 0.0013
2019-02-05 2018-12-31 13F BANK MARIN BANCORP Stock 063425102 300 150 100.00 12 -7.69 0.0017
2018-11-01 2018-09-30 13F BANK MARIN BANCORP Stock 063425102 150 0 0.00 13 8.33 0.0016
2018-07-30 2018-06-30 13F BANK MARIN BANCORP Stock 063425102 150 0 0.00 12 20.00 0.0017
2018-05-08 2018-03-31 13F BANK MARIN BANCORP Stock 063425102 150 0 0.00 10 0.00 0.0016
2018-02-13 2017-12-31 13F BANK OF MARIN BANCORP COM Stock 063425102 150 0 0.00 10 0.00 0.0016
2017-11-15 2017-09-30 13F/A-1 BANK OF MARIN BANCORP COM Stock 063425102 150 0 0.00 10 0.00 0.0017
2017-08-07 2017-06-30 13F BANK OF MARIN BANCORP COM Stock 063425102 150 0 0.00 10 11.11 0.0019
2017-05-12 2017-03-31 13F/A-1 BANK OF MARIN BANCORP COM Stock 063425102 150 0 0.00 9 -10.00 0.0018
2017-05-12 2017-03-31 13F BANK OF MARIN BANCORP COM Stock 063425102 150 9
2017-02-14 2016-12-31 13F BANK OF MARIN BANCORP COM Stock 063425102 150 150 10 0.0023
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F BANK MARIN BANCORP Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F BANK MARIN BANCORP Stock Call 19,912 635 n/a n/a n/a
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.