Columbia Banking System, Inc COLB

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Columbia Banking System, Inc. - Common Stock · Company · Nasdaq · Financial Services / Banks - Regional

Paper trade (simulated — no real money)

Fill: USD 29.7350 · FX 1 USD = 1.264610 SGD · about SGD 37.6032 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 25.96 → 29.74 · 14.5%
33.61028.84024.070 1 2 3 4 5 6 7 8 9 10,11,12 13 14 15,16 17 18 19 20 21 Sep 25Dec 25Mar 26Jun 26Sep 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 09 Sep 2025 — 10 Sep 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
30.1500 30.4400 29.7010 29.7350 1,192,980
30.8100 30.8200 30.2400 30.2700 3,433,200
No trading
Weekend
Weekend
30.3500 30.9100 30.3500 30.8000 2,305,100
30.0900 30.5600 30.0900 30.4500 2,927,400
29.4400 30.4100 29.4400 30.0800 3,838,600
29.7600 30.2000 29.2200 29.3200 3,954,800
30.1300 30.1300 29.6000 29.6400 2,374,700
Weekend
Weekend
30.4100 30.5900 30.0200 30.0700 2,649,700
30.5100 30.7600 30.2500 30.6900 2,207,900
30.6700 30.8800 30.4500 30.7100 2,523,700
30.9000 30.9000 30.3700 30.5300 2,332,600
30.8100 31.0800 30.5900 30.6400 2,427,600
Weekend
Weekend
31.0100 31.2300 30.6100 30.8100 1,991,400
30.9700 31.1000 30.7600 30.8400 2,771,800
32.1900 32.3500 30.9100 31.0700 5,157,400
32.3700 32.4900 32.0200 32.1400 2,956,600
32.6900 32.8300 32.3000 32.3400 2,609,400
Weekend
Weekend
21 · 8-K After-hours · 16:35 ET 8-K ↗
32.4600 32.7800 32.3100 32.6900 2,543,400
32.5000 32.6000 32.3300 32.4400 4,270,300
31.8800 32.2800 31.7400 32.2500 3,109,000
31.2900 31.8800 31.2700 31.7100 2,056,100
31.1900 31.3900 30.9500 31.2600 2,429,600
Weekend
Weekend
30.9400 31.2900 30.7600 31.2400 2,881,800
31.6400 31.6900 31.0100 31.0300 1,871,200
31.9300 31.9900 31.3300 31.3500 1,925,000
20 · 10-Q After-hours · 17:29 ET 10-Q ↗
31.6500 32.1800 31.4400 31.7800 2,329,500
31.4300 31.7500 31.2700 31.5000 2,583,700
Weekend
Weekend
31.5000 31.5000 30.8700 31.2700 2,966,200
19 · 8-K After-hours · 17:27 ET 8-K ↗
31.0600 31.4000 31.0000 31.2500 4,174,100
31.0900 31.2500 30.7500 30.7800 2,677,000
30.9000 31.3400 30.9000 31.2700 2,873,300
31.3700 31.5600 30.8700 30.9000 2,940,800
Weekend
Weekend
31.0400 31.6500 30.8200 31.1500 5,851,500
18 · 8-K After-hours · 16:31 ET 8-K ↗
32.2500 32.3000 31.5600 32.2600 4,889,100
32.9000 32.9700 32.3800 32.6300 2,549,600
32.8000 32.8600 32.3400 32.8500 2,551,100
33.3300 33.4600 32.6200 32.8000 2,851,800
Weekend
Weekend
33.4000 33.6500 32.9600 33.2400 3,224,000
32.5900 33.6800 32.5900 33.6100 3,500,800
32.3200 32.7700 32.2600 32.5700 3,430,200
32.0900 32.5400 32.0600 32.2500 2,074,000
32.1100 32.2000 31.7900 31.9800 2,011,000
Weekend
Weekend
32.0000 32.2100 31.7900 32.0500 1,746,300
31.4800 31.9800 31.4800 31.8200 2,467,500
32.0300 32.0500 30.8400 31.2700 2,613,800
32.3400 32.3700 32.0000 32.1200 2,281,200
31.7300 32.2500 31.6500 32.2400 2,634,800
Weekend
Weekend
No trading
32.6300 32.7700 31.6000 31.7200 3,434,800
32.2000 32.7200 31.9400 32.5100 3,082,300
17 · 8-K Next filing day · accepted 30 Jun, 18:00 ET 8-K ↗
31.9200 32.2600 31.7200 32.0500 2,470,000
32.0800 32.2100 31.7200 31.9900 2,640,100
Weekend
Weekend
32.1200 32.2600 31.8400 32.1500 5,394,500
31.5800 32.2500 31.3000 32.0700 2,923,400
31.2900 31.5700 31.0200 31.5300 2,354,800
30.8000 31.3200 30.7200 31.2700 2,389,100
30.5600 31.0000 30.5600 30.8700 2,685,000
Weekend
Weekend
No trading
30.3100 30.6300 30.1300 30.5500 6,000,400
30.7800 31.1000 29.7700 30.0500 3,700,800
31.1600 31.7800 30.8300 30.8800 2,463,200
31.7500 31.8400 30.8700 30.9500 3,584,800
Weekend
Weekend
31.0000 31.4600 30.9500 31.3100 2,708,400
30.3900 30.8400 30.1500 30.8200 2,407,700
30.1500 30.7100 30.1300 30.3200 2,757,700
30.0000 30.8700 29.7900 30.1500 3,140,100
29.7400 29.9900 29.5300 29.6800 4,220,200
Weekend
Weekend
29.5600 29.9300 29.4600 29.6600 2,249,300
28.8700 29.5800 28.8700 29.5000 2,923,400
29.0400 29.1000 28.5500 28.5900 2,763,500
29.0000 29.4800 28.9500 29.1800 2,816,900
29.2800 29.4200 28.9400 29.0000 2,461,700
Weekend
Weekend
29.2700 29.8100 29.0500 29.6400 3,481,800
29.7000 29.7300 29.3200 29.6400 2,683,900
30.1300 30.2400 29.5600 29.7900 3,201,400
29.9600 30.2300 29.7000 30.0700 2,237,400
No trading
Weekend
Weekend
29.8000 29.8200 29.5900 29.7300 1,438,200
29.5700 29.6500 29.1900 29.6200 2,049,500
28.9100 29.7900 28.7500 29.6700 2,297,300
28.9500 29.0300 28.5400 28.7300 2,671,400
28.8800 29.3400 28.8800 29.0100 2,480,500
Weekend
Weekend
16 · 8-K After market open · 13:42 ET 8-K ↗ 15 · 8-K After market open · 13:39 ET 8-K ↗
29.1200 29.2200 28.4900 28.7700 3,184,200
29.0400 29.3300 28.9600 29.1200 6,210,600
29.0700 29.1100 28.5500 28.7100 2,799,300
29.4700 29.6500 28.7400 29.0900 2,839,800
30.1100 30.2500 29.3500 29.4200 2,974,900
Weekend
Weekend
29.6400 30.1100 29.6400 30.0400 3,399,000
30.2400 30.4600 29.4600 29.5600 2,331,400
30.1000 30.3800 29.9600 30.2000 2,667,400
14 · 10-Q After-hours · 16:32 ET 10-Q ↗
29.1300 29.8300 29.0700 29.7100 2,396,300
29.3600 29.4700 28.9400 29.0700 2,583,400
Weekend
Weekend
29.4400 29.9800 29.2800 29.5600 1,835,400
29.1100 29.9100 28.9400 29.6000 2,396,200
29.5900 29.6800 28.9100 29.1200 2,033,600
30.1000 30.1900 29.5400 29.6200 2,351,100
29.2500 29.9600 29.2500 29.8500 2,419,700
Weekend
Weekend
29.0500 29.7300 28.7800 29.2200 3,183,300
13 · 8-K After-hours · 16:13 ET 8-K ↗
29.1300 29.8000 28.9700 29.6500 3,066,300
29.3000 29.3900 28.8600 29.0000 3,199,500
29.6800 29.9800 29.0400 29.0900 1,890,500
29.6000 29.8700 29.3700 29.6800 2,243,800
Weekend
Weekend
29.4000 30.1100 29.3700 29.6300 2,047,100
29.1000 29.2800 28.8600 28.9700 1,942,200
29.0500 29.2600 28.7900 29.1000 1,550,200
28.9600 29.2800 28.9200 29.0500 1,402,900
28.8200 29.2000 28.5900 29.1600 4,222,000
Weekend
Weekend
29.5300 29.6200 28.9400 28.9600 1,987,600
28.6900 29.6600 28.6900 29.5700 2,751,300
28.5600 29.2300 28.5600 28.8800 4,770,300
27.8600 28.0800 27.5000 27.6800 4,440,100
27.7200 28.1400 27.5800 28.0400 2,049,900
Weekend
Weekend
No trading
27.4100 27.8900 27.2300 27.7300 2,328,700
27.6500 28.2500 27.5700 27.9200 2,444,500
12 · DEFA14A After-hours · 17:21 ET DEFA14A ↗ 11 · DEF 14A After-hours · 17:21 ET DEF 14A ↗ 10 · 8-K After market open · 13:33 ET 8-K ↗
27.2400 27.7500 27.1300 27.4300 4,530,800
26.8100 27.0800 26.5700 26.7900 2,557,000
Weekend
Weekend
27.2500 27.2800 26.6500 26.7000 1,973,400
27.4400 27.6000 27.2600 27.4600 1,890,800
27.6400 27.8000 27.1900 27.6000 2,337,700
26.7100 27.5200 26.6100 27.4000 2,934,400
26.9500 27.4800 26.6500 26.8700 3,507,200
Weekend
Weekend
26.3700 26.5700 25.8300 26.1400 9,223,400
26.0000 26.6100 25.6800 26.4100 2,653,700
26.4100 26.6100 26.1600 26.2000 2,860,900
26.6900 26.8200 26.2700 26.4700 2,622,600
26.6700 26.8300 26.3000 26.3500 1,992,300
Weekend
Weekend
26.6500 26.8600 26.1400 26.2300 3,081,600
26.1500 26.6500 26.0800 26.4200 2,560,200
26.7700 27.0300 26.3100 26.7700 2,890,500
27.1200 27.6200 26.7300 26.9600 2,532,700
26.8700 27.4200 26.1200 27.1100 3,414,600
Weekend
Weekend
27.3200 27.5200 26.4200 27.3000 2,471,200
28.2600 28.4200 27.6900 28.0000 2,464,200
28.6500 28.9500 28.4500 28.5800 2,628,400
28.5100 28.9500 27.8300 28.6800 3,428,700
27.9200 29.1900 27.7000 29.0400 3,152,400
Weekend
Weekend
29.5700 29.7200 28.1500 28.4500 4,547,900
9 · 10-K After-hours · 16:31 ET 10-K ↗
30.5500 31.2100 30.2100 30.5800 3,237,400
30.2000 30.5100 29.8400 30.4400 3,341,500
30.0300 30.1900 29.5900 29.8600 2,825,800
31.6900 31.7400 29.8900 30.0700 3,255,200
Weekend
Weekend
31.1700 31.8100 30.9300 31.7600 3,073,200
31.1800 31.4100 30.8000 31.1900 2,594,600
31.2900 32.1200 31.1900 31.2400 3,434,400
31.5900 32.0000 31.1500 31.3000 2,697,800
No trading
Weekend
Weekend
8 · 8-K After market open · 13:21 ET 8-K ↗
31.1000 31.6300 30.7900 31.4900 3,291,500
31.9900 32.2100 30.7500 31.2500 4,149,300
32.2400 32.6200 31.3800 31.6300 2,035,300
32.3700 32.6000 31.7200 32.0200 2,382,300
32.0400 32.7000 31.8800 32.4200 2,421,600
Weekend
Weekend
31.4300 32.2300 31.4300 32.0700 2,745,900
30.9700 31.4000 30.1400 31.2400 3,445,400
30.5900 31.4200 30.5900 31.1400 3,483,700
29.7400 30.4900 29.5400 30.4400 2,752,600
29.3000 29.9600 29.0300 29.6900 2,396,900
Weekend
Weekend
28.9800 29.5000 28.9200 29.4400 2,712,300
29.1800 29.3600 28.5600 29.0400 3,754,900
28.9600 29.3400 28.8200 28.9600 2,595,300
28.9600 29.1600 28.7200 28.9600 3,104,900
28.9100 29.2600 28.3700 28.8700 3,248,300
Weekend
Weekend
30.3100 31.1100 28.8300 28.8800 8,058,200
7 · 8-K After-hours · 17:24 ET 8-K ↗
29.8000 30.2800 29.5300 29.6700 4,040,500
28.6100 29.9700 28.4600 29.7000 3,750,800
28.5200 28.8400 28.2100 28.3500 1,834,400
No trading
Weekend
Weekend
29.2800 29.3900 28.8500 28.9100 1,795,500
28.5500 29.3600 28.5100 29.2500 1,914,100
28.2400 28.6200 28.0400 28.4100 2,320,200
28.6100 28.8000 28.2200 28.2900 2,046,600
28.7400 28.8800 28.4400 28.6100 1,577,200
Weekend
Weekend
29.5000 29.7200 29.0300 29.0500 1,469,100
28.7500 29.7000 28.5000 29.3600 1,895,000
28.9500 29.1600 28.6700 28.9000 2,190,400
28.6800 29.0900 28.5400 28.9900 2,531,100
28.1100 29.1000 28.0600 28.7800 2,539,300
Weekend
Weekend
28.0500 28.3500 27.5400 28.1900 2,289,600
No trading
6 · 8-K After market open · 12:13 ET 8-K ↗
28.5000 28.5000 27.9000 27.9500 1,452,300
28.5000 28.5000 28.1500 28.2500 1,757,700
28.4300 28.6900 28.3600 28.4400 1,819,500
Weekend
Weekend
28.5600 28.7200 28.4700 28.5900 850,900
No trading
28.6500 28.7200 28.5400 28.6200 826,100
29.0000 29.0700 28.5700 28.6100 1,997,400
29.0200 29.2600 28.8900 29.0200 2,548,700
Weekend
Weekend
28.8600 29.1200 28.6400 28.8500 4,590,100
29.1800 29.2600 28.7600 28.8600 2,615,400
28.9600 29.3300 28.8200 28.9500 2,422,100
29.1400 29.3100 28.7900 28.9100 2,428,100
29.5100 29.6100 29.0900 29.1600 1,885,900
Weekend
Weekend
29.3300 29.4600 29.0500 29.2400 2,209,300
28.9600 29.5000 28.9100 29.2600 3,123,500
27.9900 29.3500 27.9900 29.0400 5,330,100
28.2700 28.7100 28.1000 28.1500 2,284,900
28.1800 28.6400 28.0600 28.3000 2,094,700
Weekend
Weekend
28.1400 28.3800 28.0500 28.1800 2,411,700
28.1000 28.3900 28.0300 28.2800 1,978,200
27.7200 28.3200 27.7200 28.1700 3,898,700
28.2300 28.2500 27.6600 27.6700 3,013,400
27.5600 28.3300 27.5100 28.0800 2,461,400
Weekend
Weekend
27.9300 28.2100 27.6900 27.7200 1,696,900
No trading
28.3200 28.5900 28.3200 28.3600 2,030,000
27.7100 28.7700 27.6900 28.4200 2,510,000
27.2600 27.6700 26.9600 27.5400 2,445,900
Weekend
Weekend
26.3100 27.4700 26.3000 27.1700 2,602,000
5 · 8-K Pre-market · 08:45 ET 8-K ↗
26.6300 27.1600 26.1500 26.2300 2,799,800
25.9300 26.4500 25.8600 26.3700 2,484,400
25.6000 26.0600 25.5100 25.8000 5,318,000
26.7900 26.9300 25.6400 25.7500 3,558,200
Weekend
Weekend
4 · 8-K After market open · 14:44 ET 8-K ↗
26.7100 27.0000 26.4700 26.9300 2,318,000
26.9200 27.3700 26.7300 26.8700 3,151,100
26.9900 27.3900 26.9100 27.1400 3,522,100
27.0800 27.3500 26.8600 26.9000 3,719,500
27.0500 27.4100 26.8300 27.1100 2,573,400
Weekend
Weekend
26.2000 26.9400 26.0300 26.9300 2,257,800
26.5200 26.7800 26.2200 26.4200 2,616,600
3 · 10-Q Next filing day · accepted 05 Nov, 17:35 ET 10-Q ↗
26.5500 27.1400 26.3500 26.5200 3,959,500
2 · 8-K After-hours · 16:02 ET 8-K ↗
26.6100 26.8500 26.2500 26.4700 3,758,800
26.5500 26.9400 26.0600 26.9200 4,691,900
Weekend
Weekend
25.6900 26.9700 25.1200 26.8000 6,117,100
1 · 8-K After-hours · 16:51 ET 8-K ↗
26.1200 26.7100 25.9700 26.0200 4,325,900
26.7400 27.1400 26.1400 26.3500 5,322,600
25.6600 26.8700 25.3600 26.8400 9,004,600
25.8500 25.8500 25.5000 25.7000 4,373,200
Weekend
Weekend
25.2900 25.7600 25.2000 25.5400 3,134,300
25.0100 25.2800 24.7500 24.9900 3,109,500
25.4900 25.6700 24.9700 25.0000 3,848,600
25.1900 25.6900 25.1400 25.5700 5,400,500
24.5700 25.5100 24.4500 25.3600 5,881,800
Weekend
Weekend
24.5100 24.7100 24.0700 24.3200 8,005,800
25.9700 26.0500 23.8300 24.0700 7,614,900
26.8000 26.8800 25.7700 26.1400 5,581,100
25.5000 26.8700 25.4800 26.7400 5,349,100
25.3700 25.7900 25.0100 25.7100 6,555,500
Weekend
Weekend
26.0500 26.6800 24.9000 24.9000 4,985,100
25.6400 25.9000 25.3200 25.6600 5,117,200
26.2000 26.2400 25.6400 25.6400 4,947,200
26.6500 26.9200 26.1600 26.1900 5,899,400
26.7000 27.3200 26.4000 26.5800 7,029,300
Weekend
Weekend
25.9600 26.5500 25.8100 26.4100 5,544,100
25.9300 26.1100 25.5400 25.9300 4,104,500
25.6100 25.9800 25.5300 25.9600 6,423,200
25.6900 25.8200 25.2600 25.7400 4,693,200
26.1900 26.2000 25.3900 25.6600 5,370,300
Weekend
Weekend
25.9100 26.1900 25.6700 26.0600 4,168,400
25.8800 26.1800 25.4400 25.8000 6,527,600
26.3900 26.6300 25.9400 26.1500 6,015,500
26.2200 26.7700 26.2100 26.3900 3,205,300
26.4200 26.6300 26.0600 26.0900 4,791,500
Weekend
Weekend
26.9400 26.9700 26.4500 26.5500 14,335,800
26.0000 26.9500 25.8200 26.9100 4,616,300
25.4600 26.5000 25.4500 25.8200 4,020,900
25.6900 25.9900 25.1000 25.3600 4,500,600
26.6400 26.7000 25.7300 25.8400 4,839,500
Weekend
Weekend
26.2400 26.3600 25.9700 26.0600 3,536,500
26.3300 26.6500 26.1300 26.2900 3,877,500
25.9600 26.5300 25.9100 26.2200 4,578,100
27.0100 27.0800 25.9600 25.9600 4,191,400

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

21 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:35 ET Summarise
20 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:29 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:27 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 30 Jun, 18:00 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) After market open · 13:42 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After market open · 13:39 ET Summarise
14 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:13 ET Summarise
12 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 17:21 ET Summarise
11 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 17:21 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After market open · 13:33 ET Summarise
9 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After market open · 13:21 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:24 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After market open · 12:13 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:45 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After market open · 14:44 ET Summarise
3 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 05 Nov, 17:35 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:51 ET Summarise