Bank of Marin Bancorp
BMRC
133 hedge funds and large institutions have $263M invested in Bank of Marin Bancorp in 2025 Q4 according to their latest regulatory filings, with 11 funds opening new positions, 43 increasing their positions, 43 reducing their positions, and 12 closing their positions.
5% more capital invested
Capital invested by funds: $250M → $263M (+$13.7M)
0% more repeat investments, than reductions
Existing positions increased: 43 | Existing positions reduced: 43
0% more call options, than puts
Call options by funds: $3K | Put options by funds: $3K
0.71% less ownership
Funds ownership: 63.61% → 62.9% (-0.71%)
8% less first-time investments, than exits
New positions opened: 11 | Existing positions closed: 12
4% less funds holding
Funds holding: 138 → 133 (-5)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HA
Heartland Advisors
Milwaukee,
Wisconsin
|
+$5.13M |
| 2 |
WP
Westmount Partners
Los Angeles,
California
|
+$2.95M |
| 3 |
BOM
Bank of Marin
Novato,
California
|
+$2.1M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$1.62M |
| 5 |
Raymond James Financial
St Petersburg,
Florida
|
+$953K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
FL
Fourthstone LLC
St Louis,
Missouri
|
-$5.48M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$3.26M |
| 3 |
EPCA
Elizabeth Park Capital Advisors
Pepper Pike,
Ohio
|
-$2.68M |
| 4 |
BCM
Bridgeway Capital Management
Houston,
Texas
|
-$1.7M |
| 5 |
EF
Empowered Funds
Havertown,
Pennsylvania
|
-$765K |
BMRC Hedge Fund Activity: Q4 2025 in Review
133 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Bank of Marin Bancorp (BMRC) for Q4 2025, worth a combined $263M — up 5.5% from $250M a quarter earlier.
Sellers outnumbered buyers: 12 funds closed out of BMRC and 11 opened new positions — a net loss of 1 holder — while 43 trimmed existing stakes and 43 added.
The largest buyer was Heartland Advisors, opening a new position worth an estimated $5.13M. The largest seller was Fourthstone LLC, cutting an estimated $5.48M.
- 133 institutional investors held Bank of Marin Bancorp (BMRC) as of Q4 2025, down from 138 in Q3 2025.
- Funds reported $263M of Bank of Marin Bancorp stock for Q4 2025, up 5.5% quarter-over-quarter.
- 11 funds opened new Bank of Marin Bancorp positions in Q4 2025 and 12 closed out, a net change of -1 holder.
- The largest Bank of Marin Bancorp buyer in Q4 2025 was Heartland Advisors, an estimated $5.13M added.
- The largest Bank of Marin Bancorp seller in Q4 2025 was Fourthstone LLC, an estimated $5.48M sold.
Based on aggregated 13F filings for Q4 2025.