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WLK
Westlake Corporation
stock NYSE

At Close

Sep 21, 2026 3:59:52 PM EDT

67.76USD-1.889%(-1.31)576,338

0.00Bid 0.00Ask 0.00Spread

Pre-market

Sep 22, 2026 9:16:30 AM EDT

67.79USD+0.030%(+0.02)2,293

After-hours

Sep 21, 2026 4:10:30 PM EDT

67.77USD+0.007%(+0.01)1

OverviewOptionsHistoricalExchange VolumeShortsMore

WLK Volume Sep 22, 2026

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Exchange	Day%	Volume	30D%
NYSE	41.92	241,584	33.06
Off Exchange¹	36.36	209,534	38.06
Nasdaq GSM	7.01	40,408	9.89
IEX	4.14	23,851	6.53
Cboe BZX	3.30	19,037	4.51
NYSE Arca	2.36	13,596	2.80
Cboe EDGX	1.88	10,843	1.98
Cboe BYX	0.82	4,734	0.63
MEMX	0.53	3,068	0.60
Nasdaq BX	0.43	2,451	0.31
MIAX Pearl	0.31	1,813	0.31
Cboe EDGA	0.28	1,624	0.62
NYSE National	0.19	1,102	0.19
Nasdaq PHLX	0.12	669	0.17
LTSE	0.11	654	0.10
NYSE American	0.11	639	0.15
CHX	0.08	470	0.06
Texas Stock Exchange LLC	0.04	220	0.01
24X National	0.00	1	0.01

chartexchange.com

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

WLK Nutrition Facts

0.79 servings per container

Serving size

729.18K

Calories

576.30K

% Day

% Avg

NYSE 242K

41.92%

33.06%

Off Exchange¹ 210K

36.36%

38.06%

Nasdaq GSM 40K

7.01%

9.89%

IEX 24K

4.14%

6.53%

Cboe BZX 19K

3.30%

4.51%

NYSE Arca 14K

2.36%

2.80%

Cboe EDGX 11K

1.88%

1.98%

Cboe BYX 5K

0.82%

0.63%

MEMX 3K

0.53%

0.60%

Nasdaq BX 2K

0.43%

0.31%

MIAX Pearl 2K

0.31%

Cboe EDGA 2K

0.28%

0.62%

NYSE National 1K

0.19%

Nasdaq PHLX 669

0.12%

0.17%

LTSE 654

0.11%

0.10%

NYSE American 639

0.11%

0.15%

CHX 470

0.08%

0.06%

Texas Stock Exchange LLC 220

0.04%

0.01%

24X National 1

0.00%

0.01%

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

chartexchange.com

WLK Off Exchange & Dark Pool Summary

Today's Off Exchange & Dark Pool volume is 209,534, which is 36.36% of today's total volume.
Today's Lit volume is 366,764, which is 63.64%.
Over the past 30 days, the average Off Exchange & Dark Pool volume has been 38.06%.
The average Lit volume has been 61.94%.

WLK Volume by Exchange

NYSE

Off Exchange

Nasdaq GSM

IEX

Cboe BZX

NYSE Arca

Cboe EDGX

Cboe BYX

MEMX

Nasdaq BX

MIAX Pearl