WLK · Westlake Corp

Track WLK — free

$79.55 -0.64 (-0.80%) At close · Aug 14

Market Cap

$10.12B

127.80M

Options Chain

Underlying $79.55 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 6 days to expiry · 36 contracts · mixed snapshot sessions · Jun 22, 2026–Aug 14, 2026; 17 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 6d Sep 18 34d Oct 16 62d Dec 18 125d Jan 15 153d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	250.9%	0.97	—		$0.45	-0.043	284.8%	1	4
Call · $45 In the money Snapshot session Unknown Last — Breakeven — Implied vol 250.9% Delta 0.97 ≈97% ITM Gamma 0.003 Theta -0.138 Vega 0.008 Open interest 0 Model this call Put · $45 Snapshot session Jul 13, 2026 Last $0.45 Breakeven $44.55 Implied vol 284.8% Delta -0.043 ≈4% ITM Gamma 0.003 Theta -0.218 Vega 0.008 Open interest 4 Model this put
0	—	210.1%	0.965	—		$0.45	-0.04	218.6%	1	53
Call · $50 In the money Snapshot session Unknown Last — Breakeven — Implied vol 210.1% Delta 0.965 ≈96% ITM Gamma 0.003 Theta -0.133 Vega 0.008 Open interest 0 Model this call Put · $50 Snapshot session Jul 10, 2026 Last $0.45 Breakeven $49.55 Implied vol 218.6% Delta -0.04 ≈4% ITM Gamma 0.004 Theta -0.155 Vega 0.008 Open interest 53 Model this put
0	—	173.2%	0.958	—		$0.05	-0.044	176%	5	19
Call · $55 In the money Snapshot session Unknown Last — Breakeven — Implied vol 173.2% Delta 0.958 ≈96% ITM Gamma 0.005 Theta -0.128 Vega 0.009 Open interest 0 Model this call Put · $55 Snapshot session Aug 5, 2026 Last $0.05 Breakeven $54.95 Implied vol 176% Delta -0.044 ≈4% ITM Gamma 0.005 Theta -0.135 Vega 0.009 Open interest 19 Model this put
0	—	123.6%	0.965	—		$1.00	-0.059	146.7%	25	69
Call · $60 In the money Snapshot session Unknown Last — Breakeven — Implied vol 123.6% Delta 0.965 ≈96% ITM Gamma 0.006 Theta -0.079 Vega 0.009 Open interest 0 Model this call Put · $60 Snapshot session Jul 31, 2026 Last $1.00 Breakeven $59.00 Implied vol 146.7% Delta -0.059 ≈6% ITM Gamma 0.008 Theta -0.143 Vega 0.016 Open interest 69 Model this put
0	1	98.6%	0.947	$13.89		$0.05	-0.074	111.5%	6	3
Call · $65 In the money Snapshot session Aug 4, 2026 Last $13.89 Breakeven $78.89 Implied vol 98.6% Delta 0.947 ≈95% ITM Gamma 0.01 Theta -0.088 Vega 0.01 Open interest 0 Model this call Put · $65 Snapshot session Aug 12, 2026 Last $0.05 Breakeven $64.95 Implied vol 111.5% Delta -0.074 ≈7% ITM Gamma 0.012 Theta -0.129 Vega 0.017 Open interest 3 Model this put
100	6	80%	0.896	$7.50		$0.01	-0.114	84.7%	5	8
Call · $70 In the money Snapshot session Aug 4, 2026 Last $7.50 Breakeven $77.50 Implied vol 80% Delta 0.896 ≈90% ITM Gamma 0.021 Theta -0.12 Vega 0.017 Open interest 100 Model this call Put · $70 Snapshot session Aug 10, 2026 Last $0.01 Breakeven $69.99 Implied vol 84.7% Delta -0.114 ≈11% ITM Gamma 0.022 Theta -0.136 Vega 0.017 Open interest 8 Model this put
20	9	63.9%	0.771	$5.50		$0.95	-0.168	47.8%	2	19
Call · $75 In the money Snapshot session Aug 4, 2026 Last $5.50 Breakeven $80.50 Implied vol 63.9% Delta 0.771 ≈77% ITM Gamma 0.045 Theta -0.162 Vega 0.035 Open interest 20 Model this call Put · $75 Snapshot session Aug 13, 2026 Last $0.95 Breakeven $74.05 Implied vol 47.8% Delta -0.168 ≈17% ITM Gamma 0.05 Theta -0.099 Vega 0.027 Open interest 19 Model this put
Underlying $79.55
486	1	37.2%	0.466	$2.20		$1.40	-0.554	26.8%	1	25
Call · $80 Snapshot session Aug 12, 2026 Last $2.20 Breakeven $82.20 Implied vol 37.2% Delta 0.466 ≈47% ITM Gamma 0.102 Theta -0.123 Vega 0.042 Open interest 486 Model this call Put · $80 In the money Snapshot session Aug 14, 2026 Last $1.40 Breakeven $78.60 Implied vol 26.8% Delta -0.554 ≈55% ITM Gamma 0.141 Theta -0.086 Vega 0.042 Open interest 25 Model this put
26	1	55.5%	0.196	$1.11		—	-0.911	36.6%	—	0
Call · $85 Snapshot session Aug 12, 2026 Last $1.11 Breakeven $86.11 Implied vol 55.5% Delta 0.196 ≈20% ITM Gamma 0.047 Theta -0.127 Vega 0.029 Open interest 26 Model this call Put · $85 In the money Snapshot session Unknown Last — Breakeven — Implied vol 36.6% Delta -0.911 ≈91% ITM Gamma 0.042 Theta -0.047 Vega 0.019 Open interest 0 Model this put
1	1	74%	0.114	$0.40		—	—	—	—	0
Call · $90 Snapshot session Aug 4, 2026 Last $0.40 Breakeven $90.40 Implied vol 74% Delta 0.114 ≈11% ITM Gamma 0.025 Theta -0.118 Vega 0.02 Open interest 1 Model this call Put · $90 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	99%	0.099	—		—	—	—	—	0
Call · $95 Snapshot session Unknown Last — Breakeven — Implied vol 99% Delta 0.099 ≈10% ITM Gamma 0.017 Theta -0.142 Vega 0.02 Open interest 0 Model this call Put · $95 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	117.9%	0.079	—		—	—	—	—	0
Call · $100 Snapshot session Unknown Last — Breakeven — Implied vol 117.9% Delta 0.079 ≈8% ITM Gamma 0.012 Theta -0.146 Vega 0.021 Open interest 0 Model this call Put · $100 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	139.1%	0.076	—		—	—	—	—	0
Call · $105 Snapshot session Unknown Last — Breakeven — Implied vol 139.1% Delta 0.076 ≈8% ITM Gamma 0.01 Theta -0.166 Vega 0.012 Open interest 0 Model this call Put · $105 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	151.2%	0.064	$0.70		—	—	—	—	0
Call · $110 Snapshot session Jun 22, 2026 Last $0.70 Breakeven $110.70 Implied vol 151.2% Delta 0.064 ≈6% ITM Gamma 0.008 Theta -0.156 Vega 0.013 Open interest 1 Model this call Put · $110 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
20	20	166.6%	0.059	$0.02		$40.20	—	—	2	0
Call · $115 Snapshot session Jul 20, 2026 Last $0.02 Breakeven $115.02 Implied vol 166.6% Delta 0.059 ≈6% ITM Gamma 0.007 Theta -0.161 Vega 0.013 Open interest 20 Model this call Put · $115 In the money Snapshot session Jul 23, 2026 Last $40.20 Breakeven $74.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
20	20	181.4%	0.056	$0.05		—	—	—	—	0
Call · $120 Snapshot session Jul 20, 2026 Last $0.05 Breakeven $120.05 Implied vol 181.4% Delta 0.056 ≈6% ITM Gamma 0.006 Theta -0.166 Vega 0.013 Open interest 20 Model this call Put · $120 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	—	195.6%	0.052	—		—	—	—	—	0
Call · $125 Snapshot session Unknown Last — Breakeven — Implied vol 195.6% Delta 0.052 ≈5% ITM Gamma 0.005 Theta -0.171 Vega 0.013 Open interest 1 Model this call Put · $125 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	209.2%	0.05	$0.60		—	—	—	—	0
Call · $130 Snapshot session Jun 22, 2026 Last $0.60 Breakeven $130.60 Implied vol 209.2% Delta 0.05 ≈5% ITM Gamma 0.005 Theta -0.176 Vega 0.014 Open interest 1 Model this call Put · $130 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jun 22, 2026–Aug 14, 2026; 17 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown.

Key facts CIK 1262823 CUSIP 960413102 13F (30d) 363 filings 334 filers Visit website Investor relations