COLB
−$24.6K
937 sh @ $26
COLB
COLUMBIA BANKING SYSTEM, INC.
SEC CIK 887343
$31.31
+3.1% · 90 days
90-day buys
$0
0 open-market
90-day sells
$115.3K
2 open-market
Net insider flow
−$115.3K
Net selling
Filings shown
60
Most recent
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At a glance
Over the last 90 days, insiders at COLB have sold a net $115.3K of stock (0 open-market buys vs 2 sells).
Largest recent trade: Schultz John F, COLB's Director, spent $174.6K of their own money on 8,559 shares at $20, growing their stake 26%.
Most active filer: Baruffi Kumi Yamamoto, with 11 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for COLB, newest firstCOLB
+$65.7K
2,506 sh @ $26
COLB
−$31.9K
1,215 sh @ $26
COLB
−$64.6K
2,240 sh @ $29
COLB
−$63.3K
2,241 sh @ $28
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COLB
−$278.5K
9,789 sh @ $28
COLB
−$116.5K
4,481 sh @ $26
COLB
Seaton Elizabeth Whitehead, COLB's Director, spent $49.6K of their own money on 2,685 shares at $18, growing their stake 12%.
+$49.6K
2,685 sh @ $18
COLB
Lund Randal Lee, COLB's Director, spent $19.3K of their own money on 1,000 shares at $19, growing their stake 6%.
+$19.3K
1,000 sh @ $19
COLB
Deer Aaron James, COLB's Chief Strategy/In…, spent $38.6K of their own money on 2,000 shares at $19, growing their stake 6%.
+$38.6K
2,000 sh @ $19
COLB
Machuca Luis, COLB's Director, spent $100.6K of their own money on 4,889 shares at $21, growing their stake 9%.
+$100.6K
4,889 sh @ $21
COLB
Nixon Torran B, COLB's Senior Executive …, spent $74.8K of their own money on 3,650 shares at $20, growing their stake 3%.
+$74.8K
3,650 sh @ $20
COLB
Finkelstein Mark A, COLB's Director, spent $75K of their own money on 3,592 shares at $21, growing their stake 18%.
+$75K
3,592 sh @ $21
COLB
Forrest Eric, COLB's Director, spent $99.2K of their own money on 4,750 shares at $21, growing their stake 24%.
+$99.2K
4,750 sh @ $21
COLB
Schultz John F, COLB's Director, spent $174.6K of their own money on 8,559 shares at $20, growing their stake 26%.
+$174.6K
8,559 sh @ $20
COLB
Baruffi Kumi Yamamoto, COLB's General Counsel, spent $15.6K of their own money on 854 shares at $18, growing their stake 2%.
+$15.6K
854 sh @ $18
COLB
Deer Aaron James, COLB's Chief Strategy/In…, spent $15.6K of their own money on 854 shares at $18, growing their stake 2%.
+$15.6K
854 sh @ $18
COLB
Baruffi Kumi Yamamoto, COLB's EVP General Couns…, spent $6.2K of their own money on 232 shares at $27, growing their stake 1%.
+$6.2K
232 sh @ $27
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $11.5K of their own money on 446 shares at $26, growing their stake 2%.
+$11.5K
446 sh @ $26
COLB
Deer Aaron James, COLB's CFO, spent $19.3K of their own money on 748 shares at $26, growing their stake 5%.
+$19.3K
748 sh @ $26
COLB
Deer Aaron James, COLB's CFO, spent $84K of their own money on 3,000 shares at $28, growing their stake 24%.
+$84K
3,000 sh @ $28
COLB
Deer Aaron James, COLB's CFO, spent $100.4K of their own money on 3,000 shares at $33, growing their stake 32%.
+$100.4K
3,000 sh @ $33
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $5.5K of their own money on 186 shares at $29, growing their stake 1%.
+$5.5K
186 sh @ $29
COLB
Deer Aaron James, COLB's CFO, spent $22.5K of their own money on 711 shares at $32, growing their stake 11%.
+$22.5K
711 sh @ $32
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $9.6K of their own money on 304 shares at $32, growing their stake 1%.
+$9.6K
304 sh @ $32
COLB
Deer Aaron James, COLB's CFO, spent $22.5K of their own money on 935 shares at $24, growing their stake 17%.
+$22.5K
935 sh @ $24
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $5.3K of their own money on 219 shares at $24, growing their stake 1%.
+$5.3K
219 sh @ $24
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $8.6K of their own money on 337 shares at $26, growing their stake 2%.
+$8.6K
337 sh @ $26
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $4.5K of their own money on 137 shares at $33, growing their stake 1%.
+$4.5K
137 sh @ $33
COLB
Baruffi Kumi Yamamoto, COLB's EVP and General C…, spent $8.4K of their own money on 259 shares at $33, growing their stake 2%.
+$8.4K
259 sh @ $33
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About COLB insider activity
This page tracks every recent Form 4 filed for COLUMBIA BANKING SYSTEM, INC. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is COLB insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for COLUMBIA BANKING SYSTEM, INC. usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.