Kumi Yamamoto Baruffi insider trades: Columbia Banking System (COLB) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Kumi reports to the SEC
Open-market buys and sales
13 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 13, 2026 | COLB | ↓ Sell | 937 | $26.23 | $25K | Direct | Mar 17, 2026 (4d) |
| Jun 30, 2023 | COLB | ↑ Buy | 854 | $18.25 | $16K | Direct | Jul 5, 2023 (5d) |
| Dec 30, 2022 | COLB | ↑ Buy | 232 | $26.84 | $6K | Direct | Jan 4, 2023 (5d) |
| Jun 30, 2022 | COLB | ↑ Buy | 446 | $25.79 | $12K | Direct | Jul 1, 2022 (1d) |
| Jan 4, 2022 | COLB | ↑ Buy | 186 | $29.45 | $5K | Direct | Jan 5, 2022 (1d) |
| Jul 6, 2021 | COLB | ↑ Buy | 304 | $31.64 | $10K | Direct | Jul 6, 2021 (0d) |
| Jan 7, 2021 | COLB | ↑ Buy | 219 | $24.06 | $5K | Direct | Jan 8, 2021 (1d) |
| Jul 2, 2020 | COLB | ↑ Buy | 337 | $25.51 | $9K | Direct | Jul 6, 2020 (4d) |
| Jan 3, 2020 | COLB | ↑ Buy | 137 | $32.81 | $4K | Direct | Jan 6, 2020 (3d) |
| Jul 1, 2019 | COLB | ↑ Buy | 259 | $32.56 | $8K | Direct | Jul 3, 2019 (2d) |
| Jan 2, 2019 | COLB | ↑ Buy | 210 | $32.66 | $7K | Direct | Jan 4, 2019 (2d) |
| Jul 5, 2018 | COLB | ↑ Buy | 374 | $36.81 | $14K | Direct | Jul 5, 2018 (0d) |
| Jan 8, 2018 | COLB | ↑ Buy | 174 | $36.63 | $6K | Direct | Jan 8, 2018 (0d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other COLB insiders
Open-market trades in the last 12 months
About Kumi Yamamoto Baruffi's insider trades
Kumi Yamamoto Baruffi is EVP General Counsel, Corp Sec at Columbia Banking System (COLB). Since Jan 8, 2018, Kumi has reported 12 open-market purchases worth $102K and 1 sale worth $25K on SEC Form 4. In the last 12 months: 1 sale ($25K).
Their filings also include shares withheld for taxes (30 filings), grants and awards (27 filings), option exercises (1 filing), shares returned to the company (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every COLB insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.