CIK: 0001801145
Total reported value
$137.0M
Reporting period: 2026-03-31 · Number of holdings: 152
Bank of Marin disclosed 152 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $137.0M and a quarterly turnover rate of 19.7%.
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Bank of Marin's disclosed holdings carry a Herfindahl concentration index of 0.016 — mathematically equivalent to about 61 equally-sized positions, well below its 152 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.10), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 50% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim MSFT
-3.5% -$2.2M
Trim TLN
-67.5% -$905.3K
Trim CRM
-38.0% -$673.7K
Add COST
0.0% $382.2K
Trim AMZN
-8.5% -$646.3K
Add ARM
+23.3% $361.5K
Showing top 135 holdings (of 152 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | AAPL | Apple INC | Stock-Tech | 5.01% | -0.15% | -1.41% | |
| 2 | MSFT | Microsoft CORP | Stock-Tech | 4.52% | -1.27% | -3.46% | |
| 3 | XLK | Ss Technology Select Sector | ETF-Tech | 4.12% | -0.12% | -0.41% | |
| 4 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 2.83% | -0.10% | -0.45% | |
| 5 | NVDA | Nvidia CORP | Stock-Tech | 2.73% | -0.11% | -2.81% | |
| 6 | VO | Vanguard Mid-cap ETF | ETF-Other | 2.43% | — | — | |
| 7 | VOO | Vanguard S&p 500 ETF | ETF-Large Cap & Growth | 2.41% | -0.07% | -3.25% | |
| 8 | AMZN | Amazon.com INC | Stock-Consumer Disc | 2.23% | -0.32% | -8.55% | |
| 9 | XLY | Ss Consumer Disc Select Sect | ETF-Other | 2.22% | — | +4.02% | |
| 10 | XLV | Ss Health Care Select Sector | ETF-Other | 2.13% | — | +2.01% | |
| 11 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 2.07% | +0.37% | — | |
| 12 | QQQ | Invesco Qqq Trust Series 1 | ETF-Tech | 2.05% | — | +2.15% | |
| 13 | VOX | Vanguard Communication Servi | ETF-Other | 1.83% | -0.12% | -4.60% | |
| 14 | BMRC | Bank Of Marin Bancorp/ca | Stock-Other | 1.81% | -0.06% | -6.73% | |
| 15 | SCHO | Schwab Short-term US Treas | ETF-Other | 1.50% | — | +4.26% | |
| 16 | XLI | Ss Industrial Select Sector | ETF-Other | 1.41% | — | +6.28% | |
| 17 | XLC | Ss Comm Select Sector Spdr | ETF-Other | 1.34% | -0.17% | -10.87% | |
| 18 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.32% | — | -3.61% | |
| 19 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 1.25% | — | +15.45% | |
| 20 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 1.22% | — | +13.11% | |
| 21 | XLF | Ss Financial Select Sector | ETF-Other | 1.18% | — | +2.58% | |
| 22 | VFH | Vanguard Financials ETF | ETF-Other | 1.17% | — | +0.58% | |
| 23 | XLP | Ss Consumer Staples Sel Sect | ETF-Other | 1.09% | — | -1.33% | |
| 24 | GOVT | Ishares US Treasury Bond ETF | ETF-Gov Bonds | 1.06% | — | -1.32% | |
| 25 | V | Visa Inc-class A Shares | Stock-Financials | 1.02% | — | +2.89% | |
| 26 | DHR | Danaher CORP | Stock-Healthcare | 1.02% | -0.13% | +1.34% | |
| 27 | ANET | Arista Networks INC | Stock-Tech | 1.00% | — | -1.02% | |
| 28 | LLY | Eli Lilly & Co | Stock-Healthcare | 0.95% | -0.20% | -8.63% | |
| 29 | VEA | Vanguard Ftse Developed ETF | ETF-Other | 0.95% | — | +3.30% | |
| 30 | BNDX | Vanguard Total Intl Bond ETF | ETF-Other | 0.92% | — | +4.04% | |
| 31 | EFA | Ishares Msci Eafe ETF | ETF-Other | 0.88% | — | +1.99% | |
| 32 | BAC | Bank Of America CORP | Stock-Financials | 0.86% | — | — | |
| 33 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.86% | — | -1.95% | |
| 34 | AMD | Advanced Micro Devices | Stock-Tech | 0.84% | — | — | |
| 35 | TIP | Ishares Tips Bond ETF | ETF-Other | 0.82% | — | +4.89% | |
| 36 | VB | Vanguard Small-cap ETF | ETF-Other | 0.82% | — | — | |
| 37 | TMO | Thermo Fisher Scientific INC | Stock-Healthcare | 0.74% | — | +6.40% | |
| 38 | VXF | Vanguard Extended Market ETF | ETF-Other | 0.74% | — | +12.39% | |
| 39 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.74% | — | +2.03% | |
| 40 | PFF | Ishares Preferred & Income S | ETF-Other | 0.72% | — | -10.98% | |
| 41 | USFR | Wisdomtree Floating Rate Tre | ETF-Other | 0.67% | — | -10.09% | |
| 42 | GLDM | Spdr Gold Minishares Trust | ETF-Commodities | 0.65% | — | -20.06% | |
| 43 | FENY | Fidelity Msci Energy Index | ETF-Large Cap & Growth | 0.65% | +0.20% | -0.24% | |
| 44 | CVX | Chevron CORP | Stock-Energy | 0.65% | +0.22% | +4.25% | |
| 45 | ISRG | Intuitive Surgical INC | Stock-Healthcare | 0.65% | -0.10% | — | |
| 46 | SPDG | Ss Spdr P S&p Sec N D ETF | ETF-Other | 0.64% | — | +15.98% | |
| 47 | IEMG | Ishares Core Msci Emerging | ETF-Emerging Markets | 0.64% | — | +17.89% | |
| 48 | ARM | Arm Holdings Plc-adr | Stock-Tech | 0.64% | +0.29% | +23.27% | |
| 49 | BLV | Vanguard Long-term Bond ETF | ETF-Other | 0.61% | — | -7.19% | |
| 50 | MCD | Mcdonald's CORP | Stock-Consumer Disc | 0.61% | — | — |
Performance for Q3 2026
+3.5%
Performance Last 4 Quarters
+18.2%
Based on 81% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 152 | $137.0M | 20 | |
| 2025-12-31 | 147 | $144.8M | 10 | |
| 2025-09-30 | 147 | $141.8M | 53 | |
| 2025-06-30 | 143 | $132.6M | 0 | |
| 2025-03-31 | 101 | $78.5M | 100 | |
| 2024-12-31 | 143 | $126.5M | 0 | |
| 2024-09-30 | 142 | $124.2M | 0 | |
| 2024-06-30 | 137 | $116.3M | 0 | |
| 2024-03-31 | 131 | $113.9M | 0 | |
| 2023-12-31 | 134 | $111.6M | 0 | |
| 2023-09-30 | 131 | $102.6M | 0 | |
| 2023-06-30 | 131 | $107.4M | 0 | |
| 2023-03-31 | 134 | $104.7M | 0 | |
| 2022-12-31 | 135 | $106.5M | 0 | |
| 2022-09-30 | 129 | $101.6M | 0 | |
| 2022-06-30 | 132 | $113.6M | 0 | |
| 2022-03-31 | 143 | $137.3M | 0 | |
| 2021-12-31 | 143 | $150.1M | 0 | |
| 2021-09-30 | 138 | $136.8M | 0 | |
| 2021-06-30 | 140 | $136.7M | 96 | |
| 2021-03-31 | 158 | $126.4M | 17 | |
| 2020-12-31 | 159 | $118.9M | 24 | |
| 2020-09-30 | 141 | $97.4M | 18 | |
| 2020-06-30 | 140 | $87.6M | 32 | |
| 2020-03-31 | 141 | $73.4M | 42 | |
| 2019-12-31 | 133 | $99.0M | 0 |
Bank of Marin's most significant position changes for 2026-03-31: New buy: Phillips 66 (PSX); Sold out: Schwab (charles) CORP (SCHW); Sold out: Fair Isaac CORP (FICO); Sold out: Vanguard Large-cap ETF (VV); Sold out: Expedia Group INC (EXPE).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | COST | Costco Wholesale CORP | +0.4% | — | Unchanged |
| 2 | ARM | Arm Holdings Plc-adr | +0.3% | +23.27% | Add |
| 3 | CVX | Chevron CORP | +0.2% | +4.25% | Add |
| 4 | FENY | Fidelity Msci Energy Index | +0.2% | -0.24% | Trim |
| 5 | PGR | Progressive CORP | +0.2% | +121.40% | Add |
| 6 | NFLX | Netflix INC | +0.2% | +44.71% | Add |
| 7 | XLB | Ss Materials Select Sector | +0.2% | +31.80% | Add |
| 8 | BMRC | Bank Of Marin Bancorp/ca | -0.1% | -6.73% | Trim |
| 9 | VOO | Vanguard S&p 500 ETF | -0.1% | -3.25% | Trim |
| 10 | GOOGL | Alphabet Inc-cl A | -0.1% | -0.45% | Trim |
| 11 | ISRG | Intuitive Surgical INC | -0.1% | — | Unchanged |
| 12 | NVDA | Nvidia CORP | -0.1% | -2.81% | Trim |
| 13 | XLK | Ss Technology Select Sector | -0.1% | -0.41% | Trim |
| 14 | VOX | Vanguard Communication Servi | -0.1% | -4.60% | Trim |
| 15 | DHR | Danaher CORP | -0.1% | +1.34% | Add |
| 16 | MLM | Martin Marietta Materials | -0.1% | -27.83% | Trim |
| 17 | AAPL | Apple INC | -0.2% | -1.41% | Trim |
| 18 | XLC | Ss Comm Select Sector Spdr | -0.2% | -10.87% | Trim |
| 19 | LLY | Eli Lilly & Co | -0.2% | -8.63% | Trim |
| 20 | ADBE | Adobe INC | -0.2% | -31.31% | Trim |
| 21 | TSM | Taiwan Semiconductor-sp Adr | -0.2% | -49.38% | Trim |
| 22 | BSX | Boston Scientific CORP | -0.3% | -1.22% | Trim |
| 23 | ATI | Ati INC | -0.3% | -58.64% | Trim |
| 24 | AMZN | Amazon.com INC | -0.3% | -8.55% | Trim |
| 25 | CRM | Salesforce INC | -0.5% | -38.00% | Trim |
| 26 | TLN | Talen Energy CORP | -0.6% | -67.48% | Trim |
| 27 | MSFT | Microsoft CORP | -1.3% | -3.46% | Trim |
| 28 | PSX | Phillips 66 | — | NEW | New buy |
| 29 | SCHW | Schwab (charles) CORP | — | EXIT | Sold out |
| 30 | FICO | Fair Isaac CORP | — | EXIT | Sold out |
| 31 | VV | Vanguard Large-cap ETF | — | EXIT | Sold out |
| 32 | EXPE | Expedia Group INC | — | EXIT | Sold out |
| 33 | CSGP | Costar Group INC | — | EXIT | Sold out |
| 34 | TYL | Tyler Technologies INC | — | NEW | New buy |
| 35 | APD | Air Products & Chemicals INC | — | NEW | New buy |
| 36 | BWXT | Bwx Technologies INC | — | NEW | New buy |
| 37 | WCC | Wesco International INC | — | NEW | New buy |
| 38 | VEEV | Veeva Systems Inc-class A | — | EXIT | Sold out |
| 39 | LDRH | Ish Ibonds 1-5y Hy & INC Lad | — | NEW | New buy |
| 40 | SMERY | Siemens Energy AG Spon Adr | — | NEW | New buy |
| 41 | NKE | Nike INC -cl B | — | EXIT | Sold out |
| 42 | MKL | Markel Group INC | — | NEW | New buy |
| 43 | PFE | Pfizer INC | — | NEW | New buy |
| 44 | TPL | Texas Pacific Land CORP | — | NEW | New buy |
| 45 | VG | Venture Global Inc-cl A | — | NEW | New buy |
| 46 | COF | Capital One Financial CORP | — | EXIT | Sold out |
| 47 | ELE | Elemental Royalty CORP | — | NEW | New buy |
| 48 | ELF | Elf Beauty INC | — | EXIT | Sold out |
| 49 | JNJ | Johnson & Johnson | — | NEW | New buy |
| 50 | VRT | Vertiv Holdings Co-a | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-14 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-05 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-13 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-11 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-06 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-09 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-09 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-09 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-07 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-08 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-05 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-13 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-09 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-16 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-10 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-15 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-09 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-04 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-10 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-05 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-12 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-13 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-12 | 13F-HR | View on EDGAR |
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