Kumi Yamamoto Baruffi is CLO & VP +1 at COLUMBIA BANKING SYSTEM, INC. (COLB). They have made 13 open-market trades across 1 company since 2018, most recently 2026-03-13.
CIK 0001619728
12 open-market purchases totalling $102K since 2018, against 1 sale. Across 12 scored buys the stock is down 7.7% at ninety days, and 8.3 points behind the S&P over the same stretch.
12 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| COLB | 53,715 | $1.5M |
Shares reported on the most recent Form 4, priced at the 2026-03-17 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 58% | 58% | 17% |
| Avg Move | +1.6% | +3.2% | -7.7% |
| Alpha | +0.0% | +0.2% | -8.3% |
| Scored | 12 | 12 | 12 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| COLB | SELL | 2026-03-13 | 2026-03-17 | $26.23 | $25K | +1.1% | +9.7% | +17.2% |
| COLB | BUY | 2023-06-30 | 2023-07-05 | $18.25 | $16K | +8.8% | +10.0% | -6.7% |
| COLB | BUY | 2022-12-30 | 2023-01-04 | $26.84 | $6K | +0.2% | +12.5% | -28.4% |
| COLB | BUY | 2022-06-30 | 2022-07-01 | $25.79 | $12K | -2.8% | +3.5% | -1.0% |
| COLB | BUY | 2022-01-04 | 2022-01-05 | $29.45 | $5K | +5.6% | +2.7% | -10.6% |
| COLB | BUY | 2021-07-06 | 2021-07-06 | $31.64 | $10K | -3.8% | -1.4% | +8.0% |
| COLB | BUY | 2021-01-07 | 2021-01-08 | $24.06 | $5K | +3.4% | +8.3% | +9.6% |
| COLB | BUY | 2020-07-02 | 2020-07-06 | $25.51 | $9K | +8.0% | +9.7% | -5.6% |
| COLB | BUY | 2020-01-03 | 2020-01-06 | $32.81 | $4K | -0.7% | +0.5% | -37.5% |
| COLB | BUY | 2019-07-01 | 2019-07-03 | $32.56 | $8K | -2.0% | -1.9% | -0.9% |
| COLB | BUY | 2019-01-02 | 2019-01-04 | $32.66 | $7K | +1.0% | -1.0% | -7.9% |
| COLB | BUY | 2018-07-05 | 2018-07-05 | $36.81 | $14K | -1.4% | -0.3% | -6.1% |
| COLB | BUY | 2018-01-08 | 2018-01-08 | $36.63 | $6K | +3.3% | -4.6% | -5.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.