Figures computed from official regulatory filings — .
Ownershipinsiders 0% · institutions 0%
In USD · as of Oct 5, 2026
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Summit Bancshares, Inc., through its subsidiary, Summit Bank, provides commercial credit and other banking services in California. It offers checking and savings accounts, and certificates of deposit. The company also provides commercial real estate, land development and construction, and commercial and consumer loans, as well as letters of credit. The company offers commercial credits and other banking services to small and mid-sized businesses and professionals, including professional firms of physicians, attorneys, accountants, real estate developers, retailers, service firms, wholesalers, and distributors, as well as individuals. Summit Bancshares, Inc. was founded in 1982 and is based in Oakland, California.
Market information source · Oct 5, 2026
Periods recorded in the consulted sources. These do not certify the legal dates of name changes.
SEC company identity · Oct 5, 2026
Open-market timeline · full history
16 buys6 sells— close pricebar = usd volume, √ scaleclick a period to filter the table
| Insider | Type | Value · USD | Signals | Details |
|---|---|---|---|---|
| Jones Tina | Buy | $10.3K | conv 64First in 12mo |
| SEC |
| Chemidlin David B | Buy | $21.8K | conv 73First in 12mo | SEC |
| Laby Arthur Blake | Buy | $25K | conv 50First in 12mo | SEC |
| Ouimet Paige | Buy | $25K | conv 50First in 12mo | SEC |
| Buck Rodney Atrack record | Buy | $66.8K | conv 81Unusual sizeFirst in 12mo | SEC |
| MacHarg Marcia L | Buy | $10K | conv 40First in 12mo | SEC |
| Kim E. Han | Buy | $44.4K | conv 36First in 12mo | SEC |
| Chemidlin David B | Buy | $945.1 | conv 50First in 12mo | SEC |
| Tan Chor Weng | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Tan Chor Weng | Other | $8.4K | SEC |
| Buck Rodney Atrack record | Other | $16.8K | SEC |
| Buck Rodney Atrack record | OtherD (derivative) | n/a (No price was disclosed in the filing) | SEC |
| Tan Chor Weng | Sell | $7.7K | SEC |
| Tan Chor Weng | Sell | $1.3K | SEC |
| Tan Chor Weng | Sell | $1.3K | SEC |
| Buck Rodney Atrack record | Buy | $14.8K | conv 65 | SEC |
| Tan Chor Weng | Buy | $4.7K | conv 19 | SEC |
| Tan Chor Weng | Buy | $4.8K | conv 45First in 12mo | SEC |
| Tan Chor Weng | Buy | $4.8K | conv 45First in 12mo | SEC |
| Buck Rodney Atrack record | Sell | $20.4K | SEC |
| Grollman William G | Sell | $10.6K | SEC |
| Grollman William G | Sell | $7K | SEC |
| Grollman William G | Buy | $15.8K | conv 36First in 12mo | SEC |
| Tan Chor Weng | Gift | n/a (No price was disclosed in the filing) | SEC |
| Tan Chor Weng | Buy | $15.6K | conv 68ClusterFirst in 12mo | SEC |