Bank of Marin
Long book
$137.0M
Q1 2026
Positions
135
Top-10 weight
31%
concentration
Last quarter
+12.6%
SPY +14.8%
Turnover
17%
of book per quarter
Strategy in plain words
auto-generated from filingsBank of Marin is an institutional manager, running a $137.0M US long book across 135 positions.
The portfolio is moderately concentrated (top 10 ≈ 31% of the book). Turnover is modest: positions are typically held for years. Current anchor positions: APPLE INC, MICROSOFT CORP, SS TECHNOLOGY SELECT SECTOR, ALPHABET INC-CL A, NVIDIA CORP.
Over the last 9 quarters its long book ran on average 0.8pp per quarter behind the S&P 500, beating the index in 2 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+3.9%
Q2 2024
+5.3%
Q3 2024
+1.1%
Q4 2024
-3.7%
Q1 2025
+9.5%
Q2 2025
+6.6%
Q3 2025
+2.7%
Q4 2025
-5.0%
Q1 2026
+12.6%
Sector allocation
Technology 44%
Consumer discretionary 14%
Financials 13%
Healthcare 9%
Industrials 6%
Services media 5%
Energy 3%
Other 3%
Long book by quarter
What does Bank of own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| AAPL APPLE INC | Technology | 27.1K | $6.9M | 5.0% | -1.4% |
| MSFT MICROSOFT CORP | Technology | 16.7K | $6.2M | 4.5% | -3.5% |
| GOOGL ALPHABET INC-CL A | Technology | 13.5K | $3.9M | 2.8% | -0.4% |
| NVDA NVIDIA CORP | Technology | 21.5K | $3.7M | 2.7% | -2.8% |
| AMZN AMAZON.COM INC | Consumer discretionary | 14.6K | $3.1M | 2.2% | -8.5% |
| COST COSTCO WHOLESALE CORP | Consumer discretionary | 2.9K | $2.8M | 2.1% | Held |
| BMRC BANK OF MARIN BANCORP/CA | Financials | 97.0K | $2.5M | 1.8% | -6.7% |
| BRK/B BERKSHIRE HATHAWAY INC-CL B | Financials | 3.6K | $1.7M | 1.3% | +15.4% |
| V VISA INC-CLASS A SHARES | Services media | 4.6K | $1.4M | 1.0% | +2.9% |
| DHR DANAHER CORP | Technology | 7.4K | $1.4M | 1.0% | +1.3% |
| ANET ARISTA NETWORKS INC | Technology | 11.1K | $1.4M | 1.0% | -1.0% |
| LLY ELI LILLY & CO | Healthcare | 1.4K | $1.3M | 1.0% | -8.6% |
| BAC BANK OF AMERICA CORP | Financials | 24.3K | $1.2M | 0.9% | Held |
| JPM JPMORGAN CHASE & CO | Financials | 4.0K | $1.2M | 0.9% | -2.0% |
| AMD ADVANCED MICRO DEVICES | Technology | 5.7K | $1.1M | 0.8% | Held |
| TMO THERMO FISHER SCIENTIFIC INC | Other | 2.1K | $1.0M | 0.7% | +6.4% |
| META META PLATFORMS INC-CLASS A | Technology | 1.8K | $1.0M | 0.7% | +2.0% |
| CVX CHEVRON CORP | Energy | 4.3K | $888K | 0.6% | +4.3% |
| ISRG INTUITIVE SURGICAL INC | Healthcare | 1.9K | $888K | 0.6% | Held |
| MCD MCDONALD'S CORP | Consumer discretionary | 2.7K | $835K | 0.6% | Held |
| MCK MCKESSON CORP | Consumer discretionary | 960 | $831K | 0.6% | Held |
| SYK STRYKER CORP | Healthcare | 2.4K | $804K | 0.6% | +7.2% |
| HD HOME DEPOT INC | Consumer discretionary | 2.4K | $802K | 0.6% | +5.6% |
| HON HONEYWELL INTERNATIONAL INC | Industrials | 3.4K | $778K | 0.6% | Held |
| BSX BOSTON SCIENTIFIC CORP | Healthcare | 12.4K | $775K | 0.6% | -1.2% |
| PSX PHILLIPS 66 | Energy | 4.2K | $772K | 0.6% | New |
| GS GOLDMAN SACHS GROUP INC | Financials | 905 | $766K | 0.6% | Held |
| FERG FERGUSON ENTERPRISES INC | Consumer discretionary | 3.0K | $704K | 0.5% | -1.0% |
| NFLX NETFLIX INC | Services media | 7.2K | $697K | 0.5% | +44.7% |
| GEV GE VERNOVA INC | Industrials | 766 | $669K | 0.5% | -16.7% |
| DE DEERE & CO | Industrials | 1.2K | $668K | 0.5% | -8.7% |
| MRK MERCK & CO. INC. | Healthcare | 5.5K | $664K | 0.5% | Held |
| XOM EXXON MOBIL CORP | Energy | 3.5K | $598K | 0.4% | Held |
| ADI ANALOG DEVICES INC | Technology | 1.9K | $589K | 0.4% | Held |
| PANW PALO ALTO NETWORKS INC | Technology | 3.5K | $568K | 0.4% | +20.5% |
| SPGI S&P GLOBAL INC | Services media | 1.3K | $553K | 0.4% | Held |
| CRM SALESFORCE INC | Technology | 2.8K | $523K | 0.4% | -38.0% |
| PGR PROGRESSIVE CORP | Financials | 2.6K | $513K | 0.4% | +121.4% |
| GOOG ALPHABET INC-CL C | Technology | 1.7K | $493K | 0.4% | Held |
| MLM MARTIN MARIETTA MATERIALS | Materials | 804 | $473K | 0.3% | -27.8% |
| TYL TYLER TECHNOLOGIES INC | Technology | 1.3K | $462K | 0.3% | New |
| APD AIR PRODUCTS & CHEMICALS INC | Materials | 1.6K | $457K | 0.3% | New |
| ATI ATI INC | Industrials | 3.1K | $447K | 0.3% | -58.6% |
| BWXT BWX TECHNOLOGIES INC | Industrials | 2.1K | $437K | 0.3% | New |
| IFF INTL FLAVORS & FRAGRANCES | Other | 5.9K | $431K | 0.3% | -1.7% |
| ELV ELEVANCE HEALTH INC | Financials | 1.5K | $428K | 0.3% | Held |
| ETN EATON CORP PLC | Industrials | 1.2K | $423K | 0.3% | +4.4% |
| INTU INTUIT INC | Technology | 974 | $421K | 0.3% | +13.8% |
| MS MORGAN STANLEY | Financials | 2.5K | $419K | 0.3% | Held |
| ABBV ABBVIE INC | Healthcare | 1.9K | $418K | 0.3% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 14, 2026 | 152 | $137.0M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 147 | $144.8M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 5, 2025 | 147 | $141.8M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 143 | $132.6M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 13, 2025 | 101 | $78.5M | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 11, 2025 | 143 | $126.5M | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 6, 2024 | 142 | $124.2M | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 9, 2024 | 137 | $116.3M | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 9, 2024 | 131 | $113.9M | canonical | SEC ↗ |
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