Updated Jul 16, 2026
Namdar Frank is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days.

Frank Namdar is the Executive Vice President and Chief Credit Officer of Columbia Banking System, Inc., the bank holding company whose subsidiary is Columbia State Bank. In the SEC filing context (CIK 0001759802; most recent filing dated 2026-01-22), he is identified as the Chief Credit Officer responsible for credit risk management across the company’s loan portfolio.
| Role | EVP Chief Credit Officer |
|---|---|
| Notability | 40/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-03-18 | COLB | COLUMBIA BANKING SYSTEM, INC. | F — Tax withholding / forfeiture | 1.4K | $26.23 | $36K |
| 2026-03-18 | COLB | COLUMBIA BANKING SYSTEM, INC. | M — Option exercise | 2.8K | $26.23 | $74K |
| 2026-03-03 | COLB | COLUMBIA BANKING SYSTEM, INC. | F — Tax withholding / forfeiture | 1.8K | $28.45 | $51K |
| 2026-02-18 | COLB | COLUMBIA BANKING SYSTEM, INC. | F — Tax withholding / forfeiture | 1.2K | $31.49 | $37K |
| 2026-02-05 | COLB | COLUMBIA BANKING SYSTEM, INC. | F — Tax withholding / forfeiture | 2.4K | $29.69 | $71K |
| 2026-02-05 | COLB | COLUMBIA BANKING SYSTEM, INC. | A — Grant or award | 4.7K | $29.69 | $139K |
| 2026-01-22 | COLB | COLUMBIA BANKING SYSTEM, INC. | F — Tax withholding / forfeiture | 1.7K | $28.35 | $47K |
| 2026-01-22 | COLB | COLUMBIA BANKING SYSTEM, INC. | D — Derivative transaction | 579 | $0.00 |
Frank Namdar is the Executive Vice President and Chief Credit Officer of Columbia Banking System, Inc., the bank holding company whose subsidiary is Columbia State Bank. In the SEC filing context (CIK 0001759802; most recent filing dated 2026-01-22), he is identified as the Chief Credit Officer responsible for credit risk management across the company’s loan portfolio.…
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