COLB
insider transactionsCOLUMBIA BANKING SYSTEM, INC. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-23.2K
0 buy · 23.2K sell
Net value · 365d
-$677.3K
$0 in · $677.3K out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
7
0 buy · 23.2K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Director
$17.9K
563 sh · $31.78
Own +1%
-
Sell·S
EVP Chief Marketing Officer
$113.5K
3.8K sh · $29.78
Own -17%
-
Sell·S
EVP Chief Marketing Officer
$1.8K
60 sh · $29.77
Own -0%
-
Grant·A
Director
$0
3.9K sh
Own +17%
-
Grant·A
Director
$0
3.9K sh
Own +12%
-
Grant·A
Director
$0
3.9K sh
Own New
-
Grant·A
Director
$0
3.9K sh
Own +12%
-
Grant·A
Director
$0
3.9K sh
Own +8%
-
Grant·A
Director
$0
3.9K sh
Own +10%
-
Grant·A
Director
$0
3.9K sh
Own +22%
-
Grant·A
Director
$0
3.9K sh
Own +15%
-
Grant·A
Director
$0
3.9K sh
Own +15%
-
Grant·A
Director
$0
3.9K sh
Own +9%
-
Other·F
EVP, Chief Accounting Officer
$11.5K
396 sh · $29.10
Own -4%
-
Grant·A
Director
$17.7K
659 sh · $26.83
Own +1%
-
Exercise·M
EVP Chief Strategy/Innov Offcr
$0
1.6K sh
Own +28%
-
Other·F
EVP Chief Strategy/Innov Offcr
$16.2K
617 sh · $26.23
Own -1%
-
Exercise·M
EVP Chief Strategy/Innov Offcr
$41.1K
1.6K sh · $26.23
Own +4%
-
Exercise·M
EVP Chief Marketing Officer
$0
940 sh
Own +25%
-
Other·F
EVP Chief Marketing Officer
$9.9K
376 sh · $26.23
Own -2%
-
Exercise·M
EVP Chief Marketing Officer
$24.7K
940 sh · $26.23
Own +4%
-
Exercise·M
Senior Executive VP
$0
5.0K sh
Own +11%
-
Other·F
Senior Executive VP
$51.8K
2.0K sh · $26.23
Own -4%
-
Exercise·M
Senior Executive VP
$131.5K
5.0K sh · $26.23
Own +12%
-
Exercise·M
EVP Chief Credit Officer
$0
2.8K sh
Own +26%
-
Other·F
EVP Chief Credit Officer
$35.9K
1.4K sh · $26.23
Own -4%
-
Exercise·M
EVP Chief Credit Officer
$74.0K
2.8K sh · $26.23
Own +9%
-
Exercise·M
EVP, Chief Accounting Officer
$0
846 sh
Own +9%
-
Sell·S
EVP, Chief Accounting Officer
$5.5K
211 sh · $26.23
Own -2%
-
Exercise·M
EVP, Chief Accounting Officer
$22.2K
846 sh · $26.23
Own +8%
-
Exercise·M
Senior Executive VP
$0
5.0K sh
Own +11%
-
Other·F
Senior Executive VP
$52.5K
2.0K sh · $26.23
Own -2%
-
Exercise·M
Senior Executive VP
$131.5K
5.0K sh · $26.23
Own +5%
-
Exercise·M
EVP Chief Risk Officer
$0
2.4K sh
Own +5%
-
Other·F
EVP Chief Risk Officer
$24.9K
951 sh · $26.23
Own -1%
-
Exercise·M
EVP Chief Risk Officer
$62.5K
2.4K sh · $26.23
Own +3%
-
Exercise·M
Clint Stein KEY
Chair, CEO, President
$0
18.2K sh
Own +12%
-
Other·F
Clint Stein KEY
Chair, CEO, President
$187.6K
7.2K sh · $26.23
Own -5%
-
Exercise·M
Clint Stein KEY
Chair, CEO, President
$476.6K
18.2K sh · $26.23
Own +13%
-
Exercise·M
EVP General Counsel, Corp Sec
$0
2.4K sh
Own +22%
-
Sell·S
EVP General Counsel, Corp Sec
$24.6K
937 sh · $26.23
Own -2%
-
Exercise·M
EVP General Counsel, Corp Sec
$62.5K
2.4K sh · $26.23
Own +5%
-
Exercise·M
EVP Chief Admin Officer
$0
2.5K sh
Own +5%
-
Other·F
EVP Chief Admin Officer
$31.9K
1.2K sh · $26.23
Own -5%
-
Exercise·M
EVP Chief Admin Officer
$65.7K
2.5K sh · $26.23
Own +12%
-
Other·F
EVP, Chief Accounting Officer
$5.5K
211 sh · $26.23
Own -2%
-
Other·F
EVP General Counsel, Corp Sec
$24.6K
937 sh · $26.23
Own -2%
-
Sell·S
Senior Executive VP · 10b5-1
$64.6K
2.2K sh · $28.85
Own -2%
-
Sell·S
Senior Executive VP · 10b5-1
$63.3K
2.2K sh · $28.25
Own -2%
-
Other·F
EVP Chief Strategy/Innov Offcr
$26.1K
918 sh · $28.45
Own -2%
-
Other·F
EVP Chief Credit Officer
$51.4K
1.8K sh · $28.45
Own -6%
-
Other·F
Senior Executive VP
$84.8K
3.0K sh · $28.45
Own -3%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$278.5K
9.8K sh · $28.45
Own -7%
-
Other·F
EVP Chief Risk Officer
$37.1K
1.3K sh · $28.45
Own -2%
-
Other·F
Senior Executive VP
$91.9K
3.2K sh · $28.45
Own -7%
-
Other·F
EVP, Chief Accounting Officer
$11.1K
391 sh · $28.45
Own -4%
-
Other·F
EVP Chief Marketing Officer
$23.8K
838 sh · $28.45
Own -4%
-
Other·F
EVP General Counsel, Corp Sec
$51.2K
1.8K sh · $28.45
Own -3%
-
Other·F
EVP Chief Admin Officer
$51.4K
1.8K sh · $28.45
Own -8%
-
Grant·A
Ivan A Seda KEY
EVP, Chief Financial Officer
$400.0K
12.8K sh · $31.24
Own New
-
Grant·A
EVP Chief Credit Officer
$250.0K
8.0K sh · $31.24
Own +95%
-
Grant·A
Clint Stein KEY
Chair, President, CEO
$1.7M
56.0K sh · $31.24
Own +43%
-
Grant·A
EVP Chief Risk Officer
$250.0K
8.0K sh · $31.24
Own +17%
-
Grant·A
Senior Executive VP
$520.0K
16.6K sh · $31.24
Own +44%
-
Grant·A
EVP Chief Marketing Officer
$87.5K
2.8K sh · $31.24
Own +99%
-
Grant·A
Senior Executive VP
$520.0K
16.6K sh · $31.24
Own +42%
-
Grant·A
EVP, Chief Accounting Officer
$175.0K
5.6K sh · $31.24
Own +111%
-
Grant·A
EVP CHRO
$260.0K
8.3K sh · $31.24
Own +116%
-
Grant·A
EVP Chief Strategy/Innov Offcr
$125.0K
4.0K sh · $31.24
Own +85%
-
Grant·A
EVP General Counsel, Corp Sec
$260.0K
8.3K sh · $31.24
Own +117%
-
Grant·A
EVP Chief Admin Officer
$250.0K
8.0K sh · $31.24
Own +18%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$123.5K
3.9K sh · $31.49
Own -3%
-
Other·F
EVP Chief Risk Officer
$29.3K
931 sh · $31.49
Own -1%
-
Other·F
Senior Executive VP
$60.0K
1.9K sh · $31.49
Own -2%
-
Other·F
EVP Chief Credit Officer
$36.8K
1.2K sh · $31.49
Own -3%
-
Other·F
EVP Chief Marketing Officer
$15.3K
485 sh · $31.49
Own -2%
-
Other·F
Senior Executive VP
$53.7K
1.7K sh · $31.49
Own -4%
-
Other·F
EVP Chief Strategy/Innov Offcr
$16.7K
531 sh · $31.49
Own -1%
-
Other·F
EVP General Counsel, Corp Sec
$32.6K
1.0K sh · $31.49
Own -2%
-
Other·F
EVP Chief Admin Officer
$24.8K
788 sh · $31.49
Own -3%
-
Grant·A
Director
$17.5K
562 sh · $31.12
Own +1%
-
Other·F
EVP Chief Strategy/Innov Offcr
$35.4K
1.2K sh · $29.69
Own -3%
-
Grant·A
EVP Chief Strategy/Innov Offcr
$77.8K
2.6K sh · $29.69
Own +6%
-
Other·F
Senior Executive VP
$146.9K
4.9K sh · $29.69
Own -10%
-
Grant·A
Senior Executive VP
$373.4K
12.6K sh · $29.69
Own +33%
-
Other·F
EVP Chief Credit Officer
$70.8K
2.4K sh · $29.69
Own -7%
-
Grant·A
EVP Chief Credit Officer
$138.6K
4.7K sh · $29.69
Own +15%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$256.9K
8.7K sh · $29.69
Own -5%
-
Grant·A
Clint Stein KEY
Chair, President, CEO
$652.8K
22.0K sh · $29.69
Own +16%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$338.0K
11.4K sh · $29.69
Own -7%
-
Grant·A
Clint Stein KEY
Chair, President, CEO
$858.8K
28.9K sh · $29.69
Own +23%
-
Other·F
EVP Chief Risk Officer
$57.3K
1.9K sh · $29.69
Own -3%
-
Grant·A
EVP Chief Risk Officer
$133.9K
4.5K sh · $29.69
Own +6%
-
Other·F
Senior Executive VP
$164.1K
5.5K sh · $29.69
Own -5%
-
Grant·A
Senior Executive VP
$411.0K
13.8K sh · $29.69
Own +14%
-
Other·F
EVP Chief Marketing Officer
$28.7K
965 sh · $29.69
Own -4%
-
Grant·A
EVP Chief Marketing Officer
$62.2K
2.1K sh · $29.69
Own +9%
-
Other·F
EVP General Counsel, Corp Sec
$62.6K
2.1K sh · $29.69
Own -4%
-
Grant·A
EVP General Counsel, Corp Sec
$151.2K
5.1K sh · $29.69
Own +10%
-
Other·F
EVP Chief Admin Officer
$50.8K
1.7K sh · $29.69
Own -7%
-
Grant·A
EVP Chief Admin Officer
$93.4K
3.1K sh · $29.69
Own +14%
-
Sell·S
Director
$403.9K
13.7K sh · $29.43
Own -100%
-
Other·F
EVP Chief Strategy/Innov Offcr
$22.0K
776 sh · $28.35
Own -2%
-
Other·D
EVP Chief Strategy/Innov Offcr
$0
325 sh
Own -1%
-
Other·F
EVP Chief Credit Officer
$46.8K
1.7K sh · $28.35
Own -5%
-
Other·D
EVP Chief Credit Officer
$0
579 sh
Own -2%
-
Other·F
EVP Chief Marketing Officer
$17.8K
628 sh · $28.35
Own -3%
-
Other·D
EVP Chief Marketing Officer
$0
260 sh
Own -1%
-
Other·F
EVP Chief Risk Officer
$38.4K
1.4K sh · $28.35
Own -2%
-
Other·D
EVP Chief Risk Officer
$0
559 sh
Own -1%
-
Other·F
Senior Executive VP
$109.8K
3.9K sh · $28.35
Own -4%
-
Other·D
Senior Executive VP
$0
1.7K sh
Own -2%
-
Other·F
Senior Executive VP
$99.1K
3.5K sh · $28.35
Own -8%
-
Other·D
Senior Executive VP
$0
1.6K sh
Own -4%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$159.8K
5.6K sh · $28.35
Own -4%
-
Other·D
Clint Stein KEY
Chair, President, CEO
$0
2.7K sh
Own -2%
-
Other·F
Clint Stein KEY
Chair, President, CEO
$215.9K
7.6K sh · $28.35
Own -5%
-
Other·D
Clint Stein KEY
Chair, President, CEO
$0
3.6K sh
Own -3%
-
Other·F
EVP General Counsel, Corp Sec
$42.8K
1.5K sh · $28.35
Own -3%
-
Other·D
EVP General Counsel, Corp Sec
$0
632 sh
Own -1%
-
Other·F
EVP Chief Admin Officer
$31.6K
1.1K sh · $28.35
Own -5%
-
Other·D
EVP Chief Admin Officer
$0
390 sh
Own -2%
-
Grant·A
Director
$1.8K
65 sh · $28.17
Own +0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Luis Machuca | Grant A | 563 | $17.9K |
| Jun 8, 2026 | Devine David Moore | Sell S | 3.8K | $113.5K |
| Jun 8, 2026 | Devine David Moore | Sell S | 60 | $1.8K |
| May 14, 2026 | Randal Lee Lund | Grant A | 3.9K | $0 |
| May 14, 2026 | Eric Forrest | Grant A | 3.9K | $0 |
| May 14, 2026 | Elizabeth Whitehead Seaton | Grant A | 3.9K | $0 |
| May 14, 2026 | Mark A Finkelstein | Grant A | 3.9K | $0 |
| May 14, 2026 | Hilliard C. Terry III | Grant A | 3.9K | $0 |
| May 14, 2026 | Christian M Mitchell | Grant A | 3.9K | $0 |
| May 14, 2026 | Jaynie M Studenmund | Grant A | 3.9K | $0 |
| May 14, 2026 | Luis Machuca | Grant A | 3.9K | $0 |
| May 14, 2026 | Anddria Varnado | Grant A | 3.9K | $0 |
| May 14, 2026 | John F Schultz | Grant A | 3.9K | $0 |
| Apr 15, 2026 | Brock Lakely | Other F | 396 | $11.5K |
| Mar 16, 2026 | Luis Machuca | Grant A | 659 | $17.7K |
| Mar 13, 2026 | Aaron James Deer | Exercise M | 1.6K | $0 |
| Mar 13, 2026 | Aaron James Deer | Other F | 617 | $16.2K |
| Mar 13, 2026 | Aaron James Deer | Exercise M | 1.6K | $41.1K |
| Mar 13, 2026 | Devine David Moore | Exercise M | 940 | $0 |
| Mar 13, 2026 | Devine David Moore | Other F | 376 | $9.9K |
| Mar 13, 2026 | Devine David Moore | Exercise M | 940 | $24.7K |
| Mar 13, 2026 | Christopher Merrywell | Exercise M | 5.0K | $0 |
| Mar 13, 2026 | Christopher Merrywell | Other F | 2.0K | $51.8K |
| Mar 13, 2026 | Christopher Merrywell | Exercise M | 5.0K | $131.5K |
| Mar 13, 2026 | Frank Namdar | Exercise M | 2.8K | $0 |
| Mar 13, 2026 | Frank Namdar | Other F | 1.4K | $35.9K |
| Mar 13, 2026 | Frank Namdar | Exercise M | 2.8K | $74.0K |
| Mar 13, 2026 | Brock Lakely | Exercise M | 846 | $0 |
| Mar 13, 2026 | Brock Lakely | Sell S | 211 | $5.5K |
| Mar 13, 2026 | Brock Lakely | Exercise M | 846 | $22.2K |
| Mar 13, 2026 | Torran B Nixon | Exercise M | 5.0K | $0 |
| Mar 13, 2026 | Torran B Nixon | Other F | 2.0K | $52.5K |
| Mar 13, 2026 | Torran B Nixon | Exercise M | 5.0K | $131.5K |
| Mar 13, 2026 | Andrew H Ognall | Exercise M | 2.4K | $0 |
| Mar 13, 2026 | Andrew H Ognall | Other F | 951 | $24.9K |
| Mar 13, 2026 | Andrew H Ognall | Exercise M | 2.4K | $62.5K |
| Mar 13, 2026 | Clint Stein KEY | Exercise M | 18.2K | $0 |
| Mar 13, 2026 | Clint Stein KEY | Other F | 7.2K | $187.6K |
| Mar 13, 2026 | Clint Stein KEY | Exercise M | 18.2K | $476.6K |
| Mar 13, 2026 | Kumi Yamamoto Baruffi | Exercise M | 2.4K | $0 |
| Mar 13, 2026 | Kumi Yamamoto Baruffi | Sell S | 937 | $24.6K |
| Mar 13, 2026 | Kumi Yamamoto Baruffi | Exercise M | 2.4K | $62.5K |
| Mar 13, 2026 | Drew K Anderson | Exercise M | 2.5K | $0 |
| Mar 13, 2026 | Drew K Anderson | Other F | 1.2K | $31.9K |
| Mar 13, 2026 | Drew K Anderson | Exercise M | 2.5K | $65.7K |
| Mar 13, 2026 | Brock Lakely | Other F | 211 | $5.5K |
| Mar 13, 2026 | Kumi Yamamoto Baruffi | Other F | 937 | $24.6K |
| Mar 4, 2026 | Torran B Nixon 10b5-1 | Sell S | 2.2K | $64.6K |
| Mar 3, 2026 | Torran B Nixon 10b5-1 | Sell S | 2.2K | $63.3K |
| Mar 1, 2026 | Aaron James Deer | Other F | 918 | $26.1K |
| Mar 1, 2026 | Frank Namdar | Other F | 1.8K | $51.4K |
| Mar 1, 2026 | Torran B Nixon | Other F | 3.0K | $84.8K |
| Mar 1, 2026 | Clint Stein KEY | Other F | 9.8K | $278.5K |
| Mar 1, 2026 | Andrew H Ognall | Other F | 1.3K | $37.1K |
| Mar 1, 2026 | Christopher Merrywell | Other F | 3.2K | $91.9K |
| Mar 1, 2026 | Brock Lakely | Other F | 391 | $11.1K |
| Mar 1, 2026 | Devine David Moore | Other F | 838 | $23.8K |
| Mar 1, 2026 | Kumi Yamamoto Baruffi | Other F | 1.8K | $51.2K |
| Mar 1, 2026 | Drew K Anderson | Other F | 1.8K | $51.4K |
| Feb 18, 2026 | Ivan A Seda KEY | Grant A | 12.8K | $400.0K |
| Feb 18, 2026 | Frank Namdar | Grant A | 8.0K | $250.0K |
| Feb 18, 2026 | Clint Stein KEY | Grant A | 56.0K | $1.7M |
| Feb 18, 2026 | Andrew H Ognall | Grant A | 8.0K | $250.0K |
| Feb 18, 2026 | Torran B Nixon | Grant A | 16.6K | $520.0K |
| Feb 18, 2026 | Devine David Moore | Grant A | 2.8K | $87.5K |
| Feb 18, 2026 | Christopher Merrywell | Grant A | 16.6K | $520.0K |
| Feb 18, 2026 | Brock Lakely | Grant A | 5.6K | $175.0K |
| Feb 18, 2026 | Judi Giem | Grant A | 8.3K | $260.0K |
| Feb 18, 2026 | Aaron James Deer | Grant A | 4.0K | $125.0K |
| Feb 18, 2026 | Kumi Yamamoto Baruffi | Grant A | 8.3K | $260.0K |
| Feb 18, 2026 | Drew K Anderson | Grant A | 8.0K | $250.0K |
| Feb 15, 2026 | Clint Stein KEY | Other F | 3.9K | $123.5K |
| Feb 15, 2026 | Andrew H Ognall | Other F | 931 | $29.3K |
| Feb 15, 2026 | Torran B Nixon | Other F | 1.9K | $60.0K |
| Feb 15, 2026 | Frank Namdar | Other F | 1.2K | $36.8K |
| Feb 15, 2026 | Devine David Moore | Other F | 485 | $15.3K |
| Feb 15, 2026 | Christopher Merrywell | Other F | 1.7K | $53.7K |
| Feb 15, 2026 | Aaron James Deer | Other F | 531 | $16.7K |
| Feb 15, 2026 | Kumi Yamamoto Baruffi | Other F | 1.0K | $32.6K |
| Feb 15, 2026 | Drew K Anderson | Other F | 788 | $24.8K |
| Feb 4, 2026 | Luis Machuca | Grant A | 562 | $17.5K |
| Feb 2, 2026 | Aaron James Deer | Other F | 1.2K | $35.4K |
| Feb 2, 2026 | Aaron James Deer | Grant A | 2.6K | $77.8K |
| Feb 2, 2026 | Christopher Merrywell | Other F | 4.9K | $146.9K |
| Feb 2, 2026 | Christopher Merrywell | Grant A | 12.6K | $373.4K |
| Feb 2, 2026 | Frank Namdar | Other F | 2.4K | $70.8K |
| Feb 2, 2026 | Frank Namdar | Grant A | 4.7K | $138.6K |
| Feb 2, 2026 | Clint Stein KEY | Other F | 8.7K | $256.9K |
| Feb 2, 2026 | Clint Stein KEY | Grant A | 22.0K | $652.8K |
| Feb 2, 2026 | Clint Stein KEY | Other F | 11.4K | $338.0K |
| Feb 2, 2026 | Clint Stein KEY | Grant A | 28.9K | $858.8K |
| Feb 2, 2026 | Andrew H Ognall | Other F | 1.9K | $57.3K |
| Feb 2, 2026 | Andrew H Ognall | Grant A | 4.5K | $133.9K |
| Feb 2, 2026 | Torran B Nixon | Other F | 5.5K | $164.1K |
| Feb 2, 2026 | Torran B Nixon | Grant A | 13.8K | $411.0K |
| Feb 2, 2026 | Devine David Moore | Other F | 965 | $28.7K |
| Feb 2, 2026 | Devine David Moore | Grant A | 2.1K | $62.2K |
| Feb 2, 2026 | Kumi Yamamoto Baruffi | Other F | 2.1K | $62.6K |
| Feb 2, 2026 | Kumi Yamamoto Baruffi | Grant A | 5.1K | $151.2K |
| Feb 2, 2026 | Drew K Anderson | Other F | 1.7K | $50.8K |
| Feb 2, 2026 | Drew K Anderson | Grant A | 3.1K | $93.4K |
| Jan 30, 2026 | Steven R Gardner | Sell S | 13.7K | $403.9K |
| Jan 20, 2026 | Aaron James Deer | Other F | 776 | $22.0K |
| Jan 20, 2026 | Aaron James Deer | Other D | 325 | $0 |
| Jan 20, 2026 | Frank Namdar | Other F | 1.7K | $46.8K |
| Jan 20, 2026 | Frank Namdar | Other D | 579 | $0 |
| Jan 20, 2026 | Devine David Moore | Other F | 628 | $17.8K |
| Jan 20, 2026 | Devine David Moore | Other D | 260 | $0 |
| Jan 20, 2026 | Andrew H Ognall | Other F | 1.4K | $38.4K |
| Jan 20, 2026 | Andrew H Ognall | Other D | 559 | $0 |
| Jan 20, 2026 | Torran B Nixon | Other F | 3.9K | $109.8K |
| Jan 20, 2026 | Torran B Nixon | Other D | 1.7K | $0 |
| Jan 20, 2026 | Christopher Merrywell | Other F | 3.5K | $99.1K |
| Jan 20, 2026 | Christopher Merrywell | Other D | 1.6K | $0 |
| Jan 20, 2026 | Clint Stein KEY | Other F | 5.6K | $159.8K |
| Jan 20, 2026 | Clint Stein KEY | Other D | 2.7K | $0 |
| Jan 20, 2026 | Clint Stein KEY | Other F | 7.6K | $215.9K |
| Jan 20, 2026 | Clint Stein KEY | Other D | 3.6K | $0 |
| Jan 20, 2026 | Kumi Yamamoto Baruffi | Other F | 1.5K | $42.8K |
| Jan 20, 2026 | Kumi Yamamoto Baruffi | Other D | 632 | $0 |
| Jan 20, 2026 | Drew K Anderson | Other F | 1.1K | $31.6K |
| Jan 20, 2026 | Drew K Anderson | Other D | 390 | $0 |
| Dec 3, 2025 | Luis Machuca | Grant A | 65 | $1.8K |
About COLB insider trading
This page tracks insider transactions for COLUMBIA BANKING SYSTEM, INC. (COLB) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.