BO
Bank of Marin 13F Filings & Institutional Holdings (Q2 2026)
Bank of MarinCIK: 0001801145
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$143.4M
Reporting period: 2026-06-30 · Number of holdings: 150
Bank of Marin disclosed 150 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $143.4M and a quarterly turnover rate of 21.9%.
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Personality snowflake
- Concentration
- 6.75
- Portfolio Stability
- 21.86
- Momentum
- 100
- Sector conviction
- 63.7
- Diversification
- 100
- Sizing Uniformity
- 88.81
Bank of Marin's disclosed holdings carry a Herfindahl concentration index of 0.017 — mathematically equivalent to about 59 equally-sized positions, well below its 150 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 1.12), 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 48% 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.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim AAPL
-41.2% -$2.3M
Add XLK
-3.3% $2.2M
Add AMD
-6.8% $1.9M
Sold out HON
Add PANW
-0.1% $638.7K
Add ARM
-27.2% $617.3K
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
Showing top 133 holdings (of 150 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | XLK | Ss Technology Select Sector | ETF-Tech | 5.46% | +1.34% | -3.26% | |
| 2 | MSFT | Microsoft CORP | Stock-Tech | 4.21% | -0.31% | -3.32% | |
| 3 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 3.22% | +0.39% | -4.19% | |
| 4 | AAPL | Apple Inc | Stock-Tech | 3.21% | -1.80% | -41.24% | |
| 5 | NVDA | Nvidia CORP | Stock-Tech | 3.07% | +0.34% | +2.50% | |
| 6 | VOO | Vanguard S&p 500 ETF | ETF-Large Cap & Growth | 2.69% | +0.28% | +1.70% | |
| 7 | VO | Vanguard Mid-cap ETF | ETF-Other | 2.61% | +0.18% | +300.00% | |
| 8 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 2.29% | +0.06% | -6.10% | |
| 9 | XLV | Ss Health Care Select Sector | ETF-Other | 2.20% | +0.07% | — | |
| 10 | XLY | Ss Consumer Disc Select Sect | ETF-Other | 2.20% | -0.02% | -3.93% | |
| 11 | AMD | Advanced Micro Devices | Stock-Tech | 2.13% | +1.29% | -6.83% | |
| 12 | QQQ | Invesco Qqq Trust Series 1 | ETF-Tech | 2.03% | -0.02% | -18.51% | |
| 13 | BMRC | Bank Of Marin Bancorp/ca | Stock-Other | 1.87% | +0.06% | — | |
| 14 | VOX | Vanguard Communication Servi | ETF-Other | 1.79% | -0.04% | — | |
| 15 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 1.74% | -0.33% | -6.32% | |
| 16 | XLI | Ss Industrial Select Sector | ETF-Other | 1.56% | +0.15% | +0.90% | |
| 17 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 1.51% | +0.26% | +21.05% | |
| 18 | SCHO | Schwab Short-term US Treas | ETF-Other | 1.51% | +0.01% | +5.78% | |
| 19 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.45% | +0.13% | — | |
| 20 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 1.32% | +0.10% | -0.98% | |
| 21 | XLF | Ss Financial Select Sector | ETF-Other | 1.23% | +0.05% | — | |
| 22 | VFH | Vanguard Financials ETF | ETF-Other | 1.22% | +0.05% | — | |
| 23 | ANET | Arista Networks Inc | Stock-Tech | 1.20% | +0.20% | -9.11% | |
| 24 | XLC | Ss Comm Select Sector Spdr | ETF-Other | 1.19% | -0.15% | -4.46% | |
| 25 | DHR | Danaher CORP | Stock-Healthcare | 1.18% | +0.16% | +20.46% | |
| 26 | V | Visa Inc-class A Shares | Stock-Financials | 1.11% | +0.09% | +0.26% | |
| 27 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.08% | +0.13% | -8.95% | |
| 28 | XLP | Ss Consumer Staples Sel Sect | ETF-Other | 1.05% | -0.04% | -0.57% | |
| 29 | ARM | Arm Holdings Plc-adr | Stock-Tech | 1.04% | +0.40% | -27.19% | |
| 30 | BNDX | Vanguard Total Intl Bond ETF | ETF-Other | 0.93% | +0.01% | +4.89% | |
| 31 | BAC | Bank Of America CORP | Stock-Financials | 0.92% | +0.06% | -4.95% | |
| 32 | VB | Vanguard Small-cap ETF | ETF-Other | 0.91% | +0.09% | — | |
| 33 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.90% | +0.04% | -2.11% | |
| 34 | EFA | Ishares Msci Eafe ETF | ETF-Other | 0.89% | +0.01% | -0.82% | |
| 35 | PANW | Palo Alto Networks Inc | Stock-Tech | 0.84% | +0.43% | -0.11% | |
| 36 | VXF | Vanguard Extended Market ETF | ETF-Other | 0.84% | +0.10% | -1.00% | |
| 37 | TIP | Ishares Tips Bond ETF | ETF-Other | 0.82% | — | +5.62% | |
| 38 | TMO | Thermo Fisher Scientific Inc | Stock-Healthcare | 0.82% | +0.08% | +13.14% | |
| 39 | GOVT | Ishares US Treasury Bond ETF | ETF-Gov Bonds | 0.73% | -0.33% | -27.32% | |
| 40 | PFF | Ishares Preferred & Income S | ETF-Other | 0.71% | -0.01% | +3.63% | |
| 41 | VEA | Vanguard Ftse Developed ETF | ETF-Other | 0.71% | -0.24% | -29.67% | |
| 42 | SPDG | Ss Spdr P S&p Sec N D ETF | ETF-Other | 0.70% | +0.06% | +2.30% | |
| 43 | GS | Goldman Sachs Group Inc | Stock-Financials | 0.64% | +0.08% | — | |
| 44 | VTI | Vanguard Total Stock Mkt ETF | ETF-Other | 0.62% | +0.04% | -4.17% | |
| 45 | BLV | Vanguard Long-term Bond ETF | ETF-Other | 0.62% | +0.01% | +5.11% | |
| 46 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.59% | -0.15% | -15.43% | |
| 47 | HD | Home Depot Inc | Stock-Consumer Disc | 0.58% | -0.01% | -3.40% | |
| 48 | GEV | GE Vernova Inc | Stock-Industrials | 0.54% | +0.05% | -13.71% | |
| 49 | SYK | Stryker CORP | Stock-Healthcare | 0.54% | -0.05% | — | |
| 50 | ISRG | Intuitive Surgical Inc | Stock-Healthcare | 0.53% | -0.12% | -1.04% |
1–50 of 133
Portfolio Performance
Performance for Q3 2026
+2.9%
Performance Last 4 Quarters
+16.8%
- Stdev
- +12.2%
- Beta
- +0.93
- Alpha
- -1.4%
- Max Drawdown
- -7.3%
- Annualized Perf
- +17.8%
- Batting Avg vs S&P
- +33.3%
- Sortino
- +2.86
- Stutzer
- +0.42
- Treynor
- +0.18
- Sterling
- +1.13
- Calmar
- +2.45
- Information Ratio
- -1.4
- Tracking Error
- +2%
- Stdev Down
- +6%
- Winning Months %
- +69.4%
- Losing Months %
- +30.6%
- Best 12 Months
- +32.2%
- Worst 12 Months
- +5.4%
- Efficiency Ratio
- +0.57
- Sharpe
- +1.41
- Stdev Sectors
- +10.6%
- Skewness
- +0.05
- Kurtosis
- -0.09
- Upside Potential
- +4.48
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 150 | $143.4M | 22 | ||
| 2026 Q1 | 152 | $137.0M | 20 | ||
| 2025 Q4 | 147 | $144.8M | 10 | ||
| 2025 Q3 | 147 | $141.8M | 53 | ||
| 2025 Q2 | 143 | $132.6M | 0 | ||
| 2025 Q1 | 101 | $78.5M | 100 | ||
| 2024 Q4 | 143 | $126.5M | 0 | ||
| 2024 Q3 | 142 | $124.2M | 0 | ||
| 2024 Q2 | 137 | $116.3M | 0 | ||
| 2024 Q1 | 131 | $113.9M | 0 | ||
| 2023 Q4 | 134 | $111.6M | 0 | ||
| 2023 Q3 | 131 | $102.6M | 0 | ||
| 2023 Q2 | 131 | $107.4M | 0 | ||
| 2023 Q1 | 134 | $104.7M | 0 | ||
| 2022 Q4 | 135 | $106.5M | 0 | ||
| 2022 Q3 | 129 | $101.6M | 0 | ||
| 2022 Q2 | 132 | $113.6M | 0 | ||
| 2022 Q1 | 143 | $137.3M | 0 | ||
| 2021 Q4 | 143 | $150.1M | 0 | ||
| 2021 Q3 | 138 | $136.8M | 0 | ||
| 2021 Q2 | 140 | $136.7M | 96 | ||
| 2021 Q1 | 158 | $126.4M | 17 | ||
| 2020 Q4 | 159 | $118.9M | 24 | ||
| 2020 Q3 | 141 | $97.4M | 18 | ||
| 2020 Q2 | 140 | $87.6M | 32 | ||
| 2020 Q1 | 141 | $73.4M | 42 | ||
| 2019 Q4 | 133 | $99.0M | 0 |
💡
Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Holding changes this quarter
Bank of Marin's most significant position changes for 2026-06-30: Sold out: Honeywell International Inc (HON); Sold out: Air Products & Chemicals Inc (APD); Sold out: Intuit Inc (INTU); New buy: ; New buy: .
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | XLK | Ss Technology Select Sector | +1.3% | -3.26% | Trim |
| 2 | AMD | Advanced Micro Devices | +1.3% | -6.83% | Trim |
| 3 | PANW | Palo Alto Networks Inc | +0.4% | -0.11% | Trim |
| 4 | ARM | Arm Holdings Plc-adr | +0.4% | -27.19% | Trim |
| 5 | GOOGL | Alphabet Inc-cl A | +0.4% | -4.19% | Trim |
| 6 | NVDA | Nvidia CORP | +0.3% | +2.50% | Add |
| 7 | VOO | Vanguard S&p 500 ETF | +0.3% | +1.70% | Add |
| 8 | ✓ | +0.3% | NEW | New buy | |
| 9 | ✓ | +0.3% | NEW | New buy | |
| 10 | BRK-B | Berkshire Hathaway Inc-cl B | +0.3% | +21.05% | Add |
| 11 | CROX | Crocs Inc | +0.3% | NEW | New buy |
| 12 | MU | Micron Technology Inc | +0.2% | NEW | New buy |
| 13 | CF | Cf Industries Holdings Inc | +0.2% | NEW | New buy |
| 14 | ALC | Alcon Inc. | +0.2% | NEW | New buy |
| 15 | LPLA | Lpl Financial Holdings Inc | +0.2% | NEW | New buy |
| 16 | ANET | Arista Networks Inc | +0.2% | -9.11% | Trim |
| 17 | QXO | Qxo Inc | +0.2% | NEW | New buy |
| 18 | VO | Vanguard Mid-cap ETF | +0.2% | +300.00% | Add |
| 19 | DHR | Danaher CORP | +0.2% | +20.46% | Add |
| 20 | XLI | Ss Industrial Select Sector | +0.2% | +0.90% | Add |
| 21 | IYT | Ishares US Transportation Et | +0.1% | NEW | New buy |
| 22 | SPY | Ss Spdr S&p 500 ETF Trust-us | +0.1% | — | Unchanged |
| 23 | LLY | Eli Lilly & Co | +0.1% | -8.95% | Trim |
| 24 | VGT | Vanguard Info Tech ETF | +0.1% | +700.00% | Add |
| 25 | QCOM | Qualcomm Inc | +0.1% | +11.46% | Add |
| 26 | IVV | Ishares Core S&p 500 ETF | +0.1% | -0.98% | Trim |
| 27 | VXF | Vanguard Extended Market ETF | +0.1% | -1.00% | Trim |
| 28 | THC | Tenet Healthcare CORP | +0.1% | +64.85% | Add |
| 29 | V | Visa Inc-class A Shares | +0.1% | +0.26% | Add |
| 30 | VB | Vanguard Small-cap ETF | +0.1% | — | Unchanged |
| 31 | SMERY | Siemens Energy AG Spon Adr | +0.1% | +531.84% | Add |
| 32 | TMO | Thermo Fisher Scientific Inc | +0.1% | +13.14% | Add |
| 33 | GS | Goldman Sachs Group Inc | +0.1% | — | Unchanged |
| 34 | ADI | Analog Devices Inc | +0.1% | — | Unchanged |
| 35 | TSM | Taiwan Semiconductor-sp Adr | +0.1% | -8.91% | Trim |
| 36 | ATI | Ati Inc | +0.1% | -3.91% | Trim |
| 37 | ELE | Elemental Royalty CORP | +0.1% | +60.63% | Add |
| 38 | XLV | Ss Health Care Select Sector | +0.1% | — | Unchanged |
| 39 | AMZN | Amazon.com Inc | +0.1% | -6.10% | Trim |
| 40 | BMRC | Bank Of Marin Bancorp/ca | +0.1% | — | Unchanged |
| 41 | BAC | Bank Of America CORP | +0.1% | -4.95% | Trim |
| 42 | SPDG | Ss Spdr P S&p Sec N D ETF | +0.1% | +2.30% | Add |
| 43 | VOT | Vanguard Mid-cap Growth ETF | +0.1% | -0.36% | Trim |
| 44 | ELV | Elevance Health Inc | +0.1% | -5.61% | Trim |
| 45 | VFH | Vanguard Financials ETF | +0.1% | — | Unchanged |
| 46 | XLF | Ss Financial Select Sector | +0.1% | — | Unchanged |
| 47 | GEV | GE Vernova Inc | +0.1% | -13.71% | Trim |
| 48 | JPM | Jpmorgan Chase & Co | 0% | -2.11% | Trim |
| 49 | SPSM | Ss Spdr P S&p 600 Small Cap | 0% | -2.46% | Trim |
| 50 | VTI | Vanguard Total Stock Mkt ETF | 0% | -4.17% | Trim |
1–50 of 144
Filing History
FAQ
What is Bank of Marin and what type of investor is it?
Bank of Marin is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $143.4M, spread across 150 disclosed positions.
What are Bank of Marin's largest equity positions?
Based on the latest 13F filing, Bank of Marin's top holdings by market value are:
1. Ss Technology Select Sector (XLK) — $7.8M (5.5%)
2. Microsoft CORP (MSFT) — $6.0M (4.2%)
3. Alphabet Inc-cl A (GOOGL) — $4.6M (3.2%)
4. Apple Inc (AAPL) — $4.6M (3.2%)
5. Nvidia CORP (NVDA) — $4.4M (3.1%)
What changes did Bank of Marin make in its most recent portfolio filing?
In the latest reported quarter, Bank of Marin made 117 notable position adjustments: 9 new positions were initiated, 28 existing holdings were added to, 69 positions were partially reduced, and 11 were completely exited. The largest of these moves: Sold out: Honeywell International Inc (HON); Sold out: Air Products & Chemicals Inc (APD); Sold out: Intuit Inc (INTU); New buy: ; New buy:
What sectors does Bank of Marin focus on?
Bank of Marin is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 39.3%
• Health Care: 15.2%
• Financials: 10.4%
• Communication Services: 9.6%
• Consumer Discretionary: 8.1%
• Industrials: 7.1%
Investment Profile
Bank of Marin returned an annualized 17.8% over the trailing 36 months — underperforming the S&P 500 by 1.4 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.93 (roughly in line with the market) and a 33% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active, with 39.3% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 22 over the past 4 quarters — a shift toward more active trading.
It has added to its ARM position over the past two quarters (+$978.8K, now $1.5M), while trimming AAPL over the same stretch (-$2.9M, still holding $4.6M).
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Developer Access
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