Bank of Marin holds a diversified book of 133 stocks worth $143.4M as of Q2 2026 (disclosed Aug 13, 2026, a ~44-day 13F lag). This quarter they opened Honeywell Intl Inc and trimmed SS Technology Select Sector. Their largest long position is SS Technology Select Sector at 5% of the equity book. Cloning the disclosed picks since 2024 would be +25% (+12.9%/yr). That is a simulation of the disclosed long book, not audited returns.
Growth of $10,000 cloning Bank of Marin's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~44 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
51% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Bank of Marin
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| OSAIC HOLDINGS, INC. | 80 / 80 | $18.8B |
| FMR LLC | 79 / 80 | $717.8B |
| MORGAN STANLEY | 79 / 80 | $551.3B |
| JPMORGAN CHASE & CO | 79 / 80 | $504.3B |
| BANK OF AMERICA CORP /DE/ | 79 / 80 | $435.3B |
| WELLS FARGO & COMPANY/MN | 79 / 80 | $173.3B |
| ROYAL BANK OF CANADA | 79 / 80 | $159.8B |
| UBS Group AG | 79 / 80 | $151.0B |
Ranked by how many of Bank of Marin's top 80 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Select Sector SPDR TR ST S TR TECHN ETF | $7.8M | 41.1K | 5.5% | ▼−3.3% Reduced · −1K sh | |
| 2 | Microsoft Corp COM | $6.0M | 16.2K | 4.2% | ▼−3.3% Reduced · −556 sh | |
| 3 | Alphabet Inc CAP STK CL A | $4.6M | 12.9K | 3.2% | ▼−4.2% Reduced · −566 sh | |
| 4 | Apple Inc COM | $4.6M | 15.9K | 3.2% | ▼−41% Reduced · −11K sh | |
| 5 | Nvidia Corporation COM | $4.4M | 22.0K | 3.1% | ▲+2.5% Added · +536 sh | |
| 6 | Vanguard Index FDS S&P 500 ETF SHS | $3.9M | 5.6K | 2.7% | ▲+1.7% Added · +94 sh | |
| 7 | Vanguard Index FDS MID CAP ETF | $3.7M | 46.4K | 2.6% | ▲+300% Added · +35K sh | |
| 8 | Amazon Com Inc COM | $3.3M | 13.8K | 2.3% | ▼−6.1% Reduced · −894 sh | |
| 9 | Select Sector SPDR TR ST S TR CARE ETF | $3.2M | 19.9K | 2.2% | —Held | |
| 10 | Select Sector SPDR TR ST S TR DISCR ETF | $3.2M | 26.9K | 2.2% | ▼−3.9% Reduced · −1K sh | |
| 11 | Advanced Micro Devices Inc COM | $3.1M | 5.3K | 2.1% | ▼−6.8% Reduced · −386 sh | |
| 12 | Invesco QQQ TR UNIT SER 1 | $2.9M | 4.0K | 2.0% | ▼−19% Reduced · −899 sh | |
| 13 | Bank Of Marin Bancorp COM | $2.7M | 97.0K | 1.9% | —Held | |
| 14 | Vanguard World FD COMM SRVC ETF | $2.6M | 13.9K | 1.8% | —Held | |
| 15 | Costco Wholesale Corporati COM | $2.5M | 2.7K | 1.7% | ▼−6.3% Reduced · −180 sh | |
| 16 | Select Sector SPDR TR ST S TR INDL ETF | $2.2M | 12.1K | 1.6% | ▲+0.9% Added · +108 sh | |
| 17 | Berkshire Hathaway Inc Del CL B NEW | $2.2M | 4.3K | 1.5% | ▲+21% Added · +755 sh | |
| 18 | Schwab Strategic TR SHT TM US TRES | $2.2M | 89.4K | 1.5% | ▲+5.8% Added · +5K sh | |
| 19 | State STR SPDR S&P 500 ETF T TR U NIT | $2.1M | 2.8K | 1.4% | —Held | |
| 20 | Ishares TR CORE S&P500 ETF | $1.9M | 2.5K | 1.3% | ▼−1.0% Reduced · −25 sh | |
| 21 | Select Sector SPDR TR ST S TR FINL ETF | $1.8M | 32.8K | 1.2% | —Held | |
| 22 | Vanguard World FD FINA NCIALS ETF | $1.7M | 13.2K | 1.2% | —Held | |
| 23 | Arista Networks Inc COM SHS | $1.7M | 10.1K | 1.2% | ▼−9.1% Reduced · −1K sh | |
| 24 | Select Sector SPDR TR ST S TR SVC ETF | $1.7M | 15.9K | 1.2% | ▼−4.5% Reduced · −740 sh | |
| 25 | Danaher Corp Del COM | $1.7M | 8.9K | 1.2% | ▲+20% Added · +2K sh | |
| 26 | Visa Inc COM CL A | $1.6M | 4.6K | 1.1% | ▲+0.3% Added · +12 sh | |
| 27 | Eli Lilly & Co COM | $1.5M | 1.3K | 1.1% | ▼−8.9% Reduced · −127 sh | |
| 28 | Select Sector SPDR TR ST S TR STAPL ETF | $1.5M | 18.1K | 1.0% | ▼−0.6% Reduced · −104 sh | |
| 29 | Arm Holdings PLC SPON SORED ADS | $1.5M | 4.2K | 1.0% | ▼−27% Reduced · −2K sh | |
| 30 | Vanguard Charlotte FDS TOTA L INT BD ETF | $1.3M | 27.4K | 0.9% | ▲+4.9% Added · +1K sh | |
| 31 | Bank Of Amer Corp COM | $1.3M | 23.1K | 0.9% | ▼−4.9% Reduced · −1K sh | |
| 32 | Vanguard Index FDS SMAL L CP ETF | $1.3M | 4.3K | 0.9% | —Held | |
| 33 | JPMorgan Chase & Co COM | $1.3M | 3.9K | 0.9% | ▼−2.1% Reduced · −85 sh | |
| 34 | Ishares TR MSCI EAFE ETF | $1.3M | 12.3K | 0.9% | ▼−0.8% Reduced · −101 sh | |
| 35 | Palo Alto Networks Inc COM | $1.2M | 3.5K | 0.8% | ▼−0.1% Reduced · −4 sh | |
| 36 | Vanguard Index FDS EXTE ND MKT ETF | $1.2M | 4.9K | 0.8% | ▼−1.0% Reduced · −49 sh | |
| 37 | Ishares TR TIPS BD ETF | $1.2M | 10.8K | 0.8% | ▲+5.6% Added · +574 sh | |
| 38 | Thermo Fisher Scientific I NC COM | $1.2M | 2.4K | 0.8% | ▲+13% Added · +273 sh | |
| 39 | Ishares TR US T REAS BD ETF | $1.0M | 45.9K | 0.7% | ▼−27% Reduced · −17K sh | |
| 40 | Ishares TR PFD AND INCM SEC | $1.0M | 33.6K | 0.7% | ▲+3.6% Added · +1K sh | |
| 41 | Vanguard Tax-Managed FDS VAN FTSE DEV MKT | $1.0M | 14.3K | 0.7% | ▼−30% Reduced · −6K sh | |
| 42 | SPDR Series Trust ST S TR SECTO ETF | $1.0M | 21.6K | 0.7% | ▲+2.3% Added · +486 sh | |
| 43 | Goldman Sachs Group Inc COM | $915K | 905 | 0.6% | —Held | |
| 44 | Vanguard Index FDS TOTA L STK MKT | $884K | 2.4K | 0.6% | ▼−4.2% Reduced · −104 sh | |
| 45 | Vanguard BD Index FDS LONG TERM BOND | $882K | 12.8K | 0.6% | ▲+5.1% Added · +622 sh | |
| 46 | Meta Platforms Inc CL A | $840K | 1.5K | 0.6% | ▼−15% Reduced · −272 sh | |
| 47 | Home Depot Inc COM | $831K | 2.4K | 0.6% | ▼−3.4% Reduced · −83 sh | |
| 48 | Ge Vernova Inc COM | $777K | 661 | 0.5% | ▼−14% Reduced · −105 sh | |
| 49 | Stryker Corporation COM | $770K | 2.4K | 0.5% | —Held | |
| 50 | Intuitive Surgical Inc COM NEW | $758K | 1.9K | 0.5% | ▼−1.0% Reduced · −20 sh |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1801145/holdings"
Use Arkolith to show Bank of Marin's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 13, 2026 | 150 | $143.4M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 14, 2026 | 152 | $137.0M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 147 | $144.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 5, 2025 | 147 | $141.8M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 143 | $132.6M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 13, 2025 | 101 | $78.5M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 11, 2025 | 143 | $126.5M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 6, 2024 | 142 | $124.2M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.