Insider · CIK 0001619728
Kumi Yamamoto Baruffi
Files at COLB (COLUMBIA BANKING SYSTEM, INC.). First filing Mar 17, 2026, latest Mar 17, 2026.
In brief
Kumi Yamamoto Baruffi files SEC Form 4 as officer at COLB (COLUMBIA BANKING SYSTEM, INC.). Since Mar 17, 2026, Kumi Yamamoto Baruffi has reported 0 open-market buys worth $0 and 1 open-market sell worth $25k, the latest filed on Mar 17, 2026.
A track record needs three past buys with six months of prices behind them; Kumi Yamamoto Baruffi has 0, so none is measured yet.
The newest scored trade: sold $25k of COLB on Mar 13, 2026, filed Mar 17, 2026, scored 15 (weak). In the last 12 months: 0 buys worth $0 and 1 sell worth $25k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
COLB: COLUMBIA BANKING SYSTEM, INC.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 15Weak | COLUMBIA BANKING SYSTEM, INC. | $25k 937 shares | -2% | +34% from low-18% from high |
Transactions
Every row this insider has filed, 27 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Mar 13, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -937 | $26.23 | $25k | 53,715 | Mar 20, 2026 |
| Mar 13, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | MOption exercise Common Stock | +2,381 | $26.23 | $62k | 54,652 | Mar 17, 2026 |
| Mar 13, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | SOpen-market sale Common Stock | -937 | $26.23 | $25k | 53,715 | Mar 17, 2026 |
| Mar 13, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | MOption exercise Restricted Stock Unitderivative | -2,381 | $0.00 | $0 | 13,083 | Mar 17, 2026 |
| Mar 1, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -1,799 | $28.45 | $51k | 52,271 | Mar 2, 2026 |
| Feb 18, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Restricted Stock Unitderivative | +8,322 | $31.24 | $260k | 15,464 | Feb 20, 2026 |
| Feb 15, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -1,036 | $31.49 | $33k | 54,070 | Feb 18, 2026 |
| Feb 2, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Common Stock | +5,093 | $29.69 | $151k | 57,216 | Feb 4, 2026 |
| Feb 2, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -2,110 | $29.69 | $63k | 55,106 | Feb 4, 2026 |
| Jan 20, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | DDisposition to issuer Common Stock | -632 | $0.00 | $0 | 53,631 | Jan 22, 2026 |
| Jan 20, 2026 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -1,508 | $28.35 | $43k | 52,123 | Jan 22, 2026 |
| Feb 28, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -1,799 | $26.73 | $48k | 54,263 | Mar 4, 2025 |
| Feb 25, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Restricted Stock Unitderivative | +7,142 | $26.60 | $190k | 7,142 | Feb 26, 2025 |
| Feb 25, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Performance Restricted Stock Unitderivative | +3,571 | $26.60 | $95k | 17,281 | Feb 26, 2025 |
| Feb 25, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Performance Restricted Stock Unitderivative | +3,571 | $26.60 | $95k | 20,852 | Feb 26, 2025 |
| Feb 14, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Common Stock | +1,012 | $27.41 | $28k | 57,535 | Feb 18, 2025 |
| Feb 14, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -442 | $27.41 | $12k | 57,093 | Feb 18, 2025 |
| Feb 14, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -1,031 | $27.41 | $28k | 56,062 | Feb 18, 2025 |
| Jan 1, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -689 | $27.01 | $19k | 57,295 | Jan 3, 2025 |
| Jan 1, 2025 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -772 | $27.01 | $21k | 56,523 | Jan 3, 2025 |
| Mar 1, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Common Stock | +13,710 | $17.87 | $245k | 57,984 | Mar 4, 2024 |
| Mar 1, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Performance Restricted Stock Unitderivative | +6,855 | $17.87 | $122k | 6,855 | Mar 4, 2024 |
| Mar 1, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Performance Restricted Stock Unitderivative | +6,855 | $17.87 | $122k | 13,710 | Mar 4, 2024 |
| Feb 15, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Common Stock | +673 | $19.01 | $13k | 43,262 | Feb 20, 2024 |
| Feb 15, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | AGrant or award Common Stock | +1,012 | $19.01 | $19k | 44,274 | Feb 20, 2024 |
| Jan 1, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -461 | $26.68 | $12k | 43,050 | Jan 3, 2024 |
| Jan 1, 2024 | COLB COLUMBIA BANKING SYSTEM, INC. | FTax withholding Common Stock | -461 | $26.68 | $12k | 42,589 | Jan 3, 2024 |
Questions about Kumi Yamamoto Baruffi
Answered from the filings on this page, as of the latest one.
Is Kumi Yamamoto Baruffi buying or selling?
In the last 12 months Kumi Yamamoto Baruffi reported 0 open-market buys worth $0 and 1 open-market sell worth $25k on SEC Form 4; the latest was sold $25k of COLB on Mar 13, 2026. Grants, option exercises and tax withholding are not counted.
How did Kumi Yamamoto Baruffi's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Kumi Yamamoto Baruffi has 0.
Where does Kumi Yamamoto Baruffi file Form 4?
Kumi Yamamoto Baruffi has filed Form 4 at COLB (COLUMBIA BANKING SYSTEM, INC.) as General Counsel, Corporate Sec. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.