Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Bank of Marin Bancorp

BMRC · Nasdaq · CIK 0001403475 · Financial Services · Banks—Regional

INSIDER SIGNAL

41.4 / 100

1 buyers · 2 purchase transaction lines · $10.2K gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeLow
RoleStrong
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35
Purchase size+1.7 / 25
Role+20.0 / 20
Recency+2.6 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 1 insider(s), not 4+
  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Purchase activity is becoming less recent
  • ✓ Role scores high · most senior buyer: Director

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Anderson Nicolas CDirector
●○●
Bonaccorso DavidEVP, Chief Financial Officer
○○
Bloom David AEXECUTIVE VICE PRESIDENT
○○
Myers Timothy DPRESIDENT & CEO
○○
Watson Secil TabliDirector
○
Sobel Brian MDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 10 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Anderson Nicolas C · $10.2K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-04-30–2026-04-30

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

41.4 / 100

Latest recorded score

↓ -0.1 ptsversus the previous recorded snapshot
  1. 41.6
  2. 41.6
  3. 41.5
  4. 41.5
  5. 41.4

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

2Purchases
0Sales
61Other Form 4 lines
41SEC filings · 365 days
BUYING2 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER19 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-3.8%
3M
-5.8%
6M
-0.3%
12M
+11.0%

Volatility & liquidity

Volatility
30.8%
Beta
—
Avg daily value
USD 4.0M

Valuation

Market cap
USD 431.9M
P/E
16.3×

Fundamentals

Profit margin
—
ROE
6.7%
Industry
Banks—Regional

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-07-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
1,056,460
Previous report
865,943
Avg daily volume
195,771
Days to cover
5.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-30Anderson Nicolas CPurchase (P)Common Stock175USD 28.88USD 5,054SEC filing ↗
2026-04-30Anderson Nicolas CPurchase (P)Common Stock200USD 25.68USD 5,136SEC filing ↗
2023-05-23Stewart MisakoPurchase (P)Common Stock1,000USD 18.46USD 18,460SEC filing ↗
2023-05-10Myers Timothy DPurchase (P)Common Stock684USD 14.56USD 9,959SEC filing ↗
2023-05-08Sathis ArasadiPurchase (P)Common Stock100USD 14.20USD 1,420SEC filing ↗
2023-05-05Sathis ArasadiPurchase (P)Common Stock200USD 14.30USD 2,860SEC filing ↗
2023-05-05Watson Secil TabliPurchase (P)Common Stock1,500USD 14.39USD 21,585SEC filing ↗
2023-05-05Merck David APurchase (P)Common Stock500USD 14.40USD 7,200SEC filing ↗
2023-05-03McDevitt Jr William HPurchase (P)Common Stock9,000USD 15.27USD 137,400SEC filing ↗
2023-05-03Kennedy Kevin RPurchase (P)Common Stock5,000USD 15.15USD 75,750SEC filing ↗
2023-05-03HELLER H ROBERTPurchase (P)Common Stock1,000USD 15.18USD 15,180SEC filing ↗
2023-05-02FITE CHARLES DPurchase (P)Common Stock3,907USD 15.08USD 58,918SEC filing ↗
2022-09-01Sanghvi Sanjiv SiddharthPurchase (P)Common Stock1,700USD 30.93USD 52,581SEC filing ↗
2021-06-03Barlow Steven I.Purchase (P)Common Stock100USD 33.71USD 3,371SEC filing ↗
2021-04-22HALE JAMES C IIIPurchase (P)Common Stock5,000USD 35.76USD 178,800SEC filing ↗

Form 4 evidence

63 transaction lines in the latest 365-day window; 493 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-22Bonaccorso DavidTax withholding (F)Common Stock273USD 28.00USD 7,644SEC filing ↗
2026-07-31Bloom David ATax withholding (F)Common Stock604USD 29.16USD 17,613SEC filing ↗
2026-07-30Anderson Nicolas CPurchase (P)Common Stock175USD 28.88USD 5,054SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-22Bonaccorso DavidTax withholding (F)Common Stock273USD 28.00USD 7,644SEC filing ↗
2026-07-31Bloom David ATax withholding (F)Common Stock604USD 29.16USD 17,613SEC filing ↗
2026-07-30Anderson Nicolas CPurchase (P)Common Stock175USD 28.88USD 5,054SEC filing ↗
2026-07-01Watson Secil TabliJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Sobel Brian MJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Sklar JoelJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Kennedy Kevin RJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01HALE JAMES C IIIJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Gencer CigdemJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01FITE CHARLES DJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Colombo Russell AJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-07-01Anderson Nicolas CJ (J)Common Stock849USD 28.94USD 24,570SEC filing ↗
2026-06-10Bonaccorso DavidTax withholding (F)Common Stock296USD 26.15USD 7,740SEC filing ↗
2026-06-10Bloom David ATax withholding (F)Common Stock604USD 26.15USD 15,795SEC filing ↗
2026-05-15Myers Timothy DJ (J)Common Stock280USD 25.92USD 7,254SEC filing ↗
2026-05-14Stewart MisakoJ (J)Common Stock109USD 0.00USD 0SEC filing ↗
2026-05-14Sathis ArasadiJ (J)Common Stock31USD 0.00USD 0SEC filing ↗
2026-05-14Myers Timothy DJ (J)Common Stock314USD 0.00USD 0SEC filing ↗
2026-05-14Gotelli RobertJ (J)Common Stock357USD 0.00USD 0SEC filing ↗
2026-05-14Campbell BrandiJ (J)Common Stock69USD 0.00USD 0SEC filing ↗
2026-04-30Anderson Nicolas CPurchase (P)Common Stock200USD 25.68USD 5,136SEC filing ↗
2026-03-25Stewart MisakoJ (J)Common Stock3,222USD 0.00USD 0SEC filing ↗
2026-03-25Myers Timothy DJ (J)Common Stock10,755USD 0.00USD 0SEC filing ↗
2026-03-25Gotelli RobertJ (J)Common Stock2,212USD 0.00USD 0SEC filing ↗
2026-03-25Campbell BrandiJ (J)Common Stock2,817USD 0.00USD 0SEC filing ↗
2026-03-03Stewart MisakoTax withholding (F)Common Stock254USD 25.03USD 6,358SEC filing ↗
2026-03-03Sathis ArasadiTax withholding (F)Common Stock245USD 25.03USD 6,132SEC filing ↗
2026-03-03Myers Timothy DTax withholding (F)Common Stock1,037USD 25.03USD 25,956SEC filing ↗
2026-03-03Campbell BrandiTax withholding (F)Common Stock253USD 25.03USD 6,333SEC filing ↗
2026-03-03Bonaccorso DavidTax withholding (F)Common Stock278USD 25.03USD 6,958SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerBMRC
CIK0001403475
SectorFinancial Services
IndustryBanks—Regional Yahoo Finance
SEC SIC6022 State Commercial Banks
ExchangeNasdaq

Data coverage

Local Form 4 history493 transaction lines from 2020-01-02 to 2026-09-22
19 P purchase lines · 34 S sale lines · 440 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.