Q2 2026 13F · SEC CIK 1801145

Bank of Marin

Bank & trustFiled 2026-08-13 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $143.4M
Reported positions: 133
Top holdings a year, 3 yrs: +18.3%
Average holding period: 4.2 yrs

Bank of Marin is a bank & trust that reported 133 positions worth $143.4M in its Q2 2026 13F, filed 2026-08-13. Its largest holdings were Select Sector Spdr Tr (XLK, 5.5%), Microsoft Corp (MSFT, 4.2%), Alphabet Inc (GOOGL, 3.2%). A portfolio copying its top holdings returned 18.3% a year over the last 3 years, against 20.4% for the S&P 500.

Bank of Marin holdings largest 50 of 133 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Bank of Marin 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
XLKSelect Sector Spdr Tr	5.5%	4.1%	41,140	-3.3%	$7.8M
MSFTMicrosoft Corp	4.2%	4.5%	16,181	-3.3%	$6.0M
GOOGLAlphabet Inc	3.2%	2.8%	12,940	-4.2%	$4.6M
AAPLApple Inc	3.2%	5.0%	15,913	-41.2%	$4.6M
NVDANvidia Corporation	3.1%	2.7%	22,006	+2.5%	$4.4M
VOOVanguard Index Fds	2.7%	2.4%	5,624	+1.7%	$3.9M
VOVanguard Index Fds	2.6%	2.4%	46,380	+300.0%	$3.7M
AMZNAmazon Com Inc	2.3%	2.2%	13,753	-6.1%	$3.3M
XLVSelect Sector Spdr Tr	2.2%	2.1%	19,872	+0.0%	$3.2M
XLYSelect Sector Spdr Tr	2.2%	2.2%	26,872	-3.9%	$3.2M
AMDAdvanced Micro Devices Inc	2.1%	0.8%	5,266	-6.8%	$3.1M
QQQInvesco Qqq Tr	2.0%	2.0%	3,958	-18.5%	$2.9M
BMRCBank of Marin Bancorp	1.9%	1.8%	97,046	+0.0%	$2.7M
VOXVanguard Telecommunication Ser	1.8%	1.8%	13,934	+0.0%	$2.6M
COSTCostco Wholesale Corporation	1.7%	2.1%	2,670	-6.3%	$2.5M
XLISelect Sector Spdr Tr	1.6%	1.4%	12,095	+0.9%	$2.2M
BRK-BBerkshire Hathaway Inc Del	1.5%	1.3%	4,342	+21.0%	$2.2M
SCHOSchwab Strategic Tr	1.5%	1.5%	89,433	+5.8%	$2.2M
SPYState Str Spdr S&p 500 ETF T	1.4%	1.3%	2,779	+0.0%	$2.1M
IVVIshares Tr	1.3%	1.2%	2,537	-1.0%	$1.9M
XLFSelect Sector Spdr Tr	1.2%	1.2%	32,812	+0.0%	$1.8M
VFHVanguard World Fd	1.2%	1.2%	13,249	+0.0%	$1.7M
ANETArista Networks Inc	1.2%	1.0%	10,121	-9.1%	$1.7M
XLCSelect Sector Spdr Tr	1.2%	1.3%	15,867	-4.5%	$1.7M
DHRDanaher Corp Del	1.2%	1.0%	8,866	+20.5%	$1.7M
VVisa Inc	1.1%	1.0%	4,634	+0.3%	$1.6M
LLYEli Lilly & Co	1.1%	1.0%	1,292	-8.9%	$1.5M
XLPSelect Sector Spdr Tr	1.0%	1.1%	18,116	-0.6%	$1.5M
ARMArm Holdings PLC	1.0%	0.6%	4,205	-27.2%	$1.5M
BNDXVanguard Charlotte Fds	0.9%	0.9%	27,424	+4.9%	$1.3M
BACBank of Amer Corp	0.9%	0.9%	23,063	-4.9%	$1.3M
VBVanguard Index Fds	0.9%	0.8%	4,300	+0.0%	$1.3M
JPMJpmorgan Chase & Co	0.9%	0.9%	3,936	-2.1%	$1.3M
EFAIshares Tr	0.9%	0.9%	12,262	-0.8%	$1.3M
PANWPalo Alto Networks Inc	0.8%	—	3,538	—	$1.2M
VXFVanguard Index Fds	0.8%	0.7%	4,868	-1.0%	$1.2M
TIPIshares Tr	0.8%	0.8%	10,792	+5.6%	$1.2M
TMOThermo Fisher Scientific Inc	0.8%	0.7%	2,350	+13.1%	$1.2M
GOVTIshares Tr	0.7%	1.1%	45,891	-27.3%	$1.0M
PFFIshares Tr	0.7%	0.7%	33,556	+3.6%	$1.0M
VEAVanguard Ftse Developed Markets Index Fu	0.7%	0.9%	14,254	-29.7%	$1.0M
SPDGSpdr Series Trust	0.7%	0.6%	21,608	+2.3%	$1.0M
GSGoldman Sachs Group Inc	0.6%	—	905	—	$915K
VTIVanguard Index Fds	0.6%	—	2,389	—	$884K
BLVVanguard Bd Index Fds	0.6%	0.6%	12,800	+5.1%	$882K
METAMeta Platforms Inc	0.6%	0.7%	1,491	-15.4%	$840K
HDHome Depot Inc	0.6%	—	2,357	—	$831K
GEVGe Vernova Inc	0.5%	—	661	—	$777K
SYKStryker Corporation	0.5%	—	2,446	—	$770K
ISRGIntuitive Surgical Inc	0.5%	0.6%	1,906	-1.0%	$758K

What Bank of Marin bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Added to

VO Vanguard Index Fds+300.0% shares
BRK-B Berkshire Hathaway Inc Del+21.0% shares
DHR Danaher Corp Del+20.5% shares
TMO Thermo Fisher Scientific Inc+13.1% shares
SCHO Schwab Strategic Tr+5.8% shares
TIP Ishares Tr+5.6% shares
BLV Vanguard Bd Index Fds+5.1% shares

Reduced

AAPL Apple Inc-41.2% shares
VEA Vanguard Ftse Developed Markets Index Fu-29.7% shares
GOVT Ishares Tr-27.3% shares
ARM Arm Holdings PLC-27.2% shares
QQQ Invesco Qqq Tr-18.5% shares
META Meta Platforms Inc-15.4% shares
ANET Arista Networks Inc-9.1% shares
LLY Eli Lilly & Co-8.9% shares

Left the top 50

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +16.8% /yr; S&P 500 +20.1%
3 years: +18.3% /yr; S&P 500 +20.4%
5 years: +8.8% /yr; S&P 500 +11.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$143.4M	133
Q1 2026	$137.0M	135
Q4 2025	$144.8M	130
Q3 2025	$141.8M	130
Q2 2025	$132.6M	126
Q1 2025	$78.5M	90
Q4 2024	$126.5M	125
Q3 2024	$124.2M	125
Q2 2024	$116.3M	120
Q1 2024	$113.9M	115
Q4 2023	$111.6M	118
Q3 2023	$102.6M	116

Questions about Bank of Marin's portfolio

What stocks does Bank of Marin own?

Bank of Marin's latest 13F, for Q2 2026 and filed Aug 13, 2026, lists 133 positions worth $143.4M. The largest are Select Sector Spdr Tr (XLK) at 5.5%, Microsoft Corp (MSFT) at 4.2%, Alphabet Inc (GOOGL) at 3.2%, Apple Inc (AAPL) at 3.2% and Nvidia Corporation (NVDA) at 3.1%.

What did Bank of Marin buy last quarter?

In Q2 2026, Bank of Marin added Vanguard Index Fds (VO) (+300.0% shares), Berkshire Hathaway Inc Del (BRK-B) (+21.0% shares) and Danaher Corp Del (DHR) (+20.5% shares), compared with its Q1 2026 filing.

What did Bank of Marin sell last quarter?

In Q2 2026, Bank of Marin cut from its top 50 Wisdomtree Tr (USFR), cut from its top 50 World Gold Tr (GLDM), cut from its top 50 Fidelity Covington Trust (FENY), cut from its top 50 Chevron Corporation (CVX), cut from its top 50 Ishares Inc (IEMG), Apple Inc (AAPL) (-41.2% shares), Vanguard Ftse Developed Markets Index Fu (VEA) (-29.7% shares) and Ishares Tr (GOVT) (-27.3% shares), compared with its Q1 2026 filing.

How has Bank of Marin's portfolio performed?

A portfolio copying Bank of Marin's 20 largest 13F holdings each quarter, from the day each filing was public, returned +18.3% a year over the last 3 years, against +20.4% for the S&P 500. Over 1 year: +16.8% against +20.1%. Over 5 years: +8.8% a year against +11.6%.

When is Bank of Marin's next 13F filing due?

13F filings are due 45 days after each quarter ends. Bank of Marin's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.