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COLB
Columbia Banking Systems Inc
stock NASDAQ

At Close

Oct 1, 2026 3:59:57 PM EDT

28.73USD+0.455%(+0.13)3,280,768

27.35Bid 29.90Ask 2.55Spread

Pre-market

Oct 1, 2026 9:28:30 AM EDT

28.50USD-0.350%(-0.10)130

After-hours

Sep 29, 2026 4:08:30 PM EDT

28.69USD0.000%(0.00)0

OverviewOptionsHistoricalDark Pool LevelsShortsMore

COLB Volume Oct 1, 2026

[NF]

Exchange	Day%	Volume	30D%
Nasdaq GSM	35.29	1,157,006	39.69
Off Exchange¹	31.62	1,036,714	35.53
IEX	11.22	367,867	7.92
NYSE Arca	8.09	265,079	6.12
Cboe BZX	4.14	135,713	3.76
Cboe EDGX	2.93	96,096	2.40
NYSE	2.07	67,750	1.44
MEMX	1.18	38,715	0.84
MIAX Pearl	0.89	29,168	0.42
NYSE American	0.55	18,029	0.10
NYSE National	0.54	17,828	0.44
Cboe BYX	0.53	17,506	0.49
Cboe EDGA	0.48	15,805	0.47
24X National	0.15	4,774	0.02
Nasdaq BX	0.11	3,743	0.08
Texas Stock Exchange LLC	0.08	2,537	0.08
Nasdaq PHLX	0.07	2,291	0.13
CHX	0.06	1,827	0.07
LTSE	0.00	0	0.00

chartexchange.com

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

COLB Nutrition Facts

1.13 servings per container

Serving size

2.89M

Calories

3.28M

% Day

% Avg

Nasdaq GSM 1M

35.29%

39.69%

Off Exchange¹ 1M

31.62%

35.53%

IEX 368K

11.22%

7.92%

NYSE Arca 265K

8.09%

6.12%

Cboe BZX 136K

4.14%

3.76%

Cboe EDGX 96K

2.93%

2.40%

NYSE 68K

2.07%

1.44%

MEMX 39K

1.18%

0.84%

MIAX Pearl 29K

0.89%

0.42%

NYSE American 18K

0.55%

0.10%

NYSE National 18K

0.54%

0.44%

Cboe BYX 18K

0.53%

0.49%

Cboe EDGA 16K

0.48%

0.47%

24X National 5K

0.15%

0.02%

Nasdaq BX 4K

0.11%

0.08%

Texas Stock Exchange LLC 3K

0.08%

Nasdaq PHLX 2K

0.07%

0.13%

CHX 2K

0.06%

0.07%

LTSE 0

0.00%

¹ A) Dark Pool or Off Exchange? B) Venues explained. C) All trades that update volume from the CTA.

chartexchange.com

COLB Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 1,036,714, which is 31.62% of today's total volume.
Today's Lit volume is 2,241,734, which is 68.38%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 35.53%.
The average Lit volume has been 64.47%.

COLB Volume by Exchange

Nasdaq GSM

Off Exchange

IEX

NYSE Arca

Cboe BZX

Cboe EDGX

NYSE

MEMX

MIAX Pearl

NYSE American

NYSE National