WRB · Berkley W R Corp

Track WRB — free

$70.51 +0.04 (+0.06%) At close · Aug 14

Market Cap

$25.89B

371.23M

Options Chain

Underlying $70.51 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 34 contracts · mixed snapshot sessions · Jul 13, 2026–Aug 14, 2026; 13 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 5d Sep 18 33d Oct 16 61d Jan 15 152d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		$0.09	-0.044	232.5%	1	2
Call · $44.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $44.5 Snapshot session Aug 11, 2026 Last $0.09 Breakeven $44.41 Implied vol 232.5% Delta -0.044 ≈4% ITM Gamma 0.004 Theta -0.164 Vega 0.007 Open interest 2 Model this put
0	—	—	—	—		$0.10	-0.048	210.2%	1	1
Call · $47 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $47 Snapshot session Jul 31, 2026 Last $0.10 Breakeven $46.90 Implied vol 210.2% Delta -0.048 ≈5% ITM Gamma 0.005 Theta -0.161 Vega 0.007 Open interest 1 Model this put
0	—	—	—	—		—	-0.053	189.1%	—	0
Call · $49.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $49.5 Snapshot session Unknown Last — Breakeven — Implied vol 189.1% Delta -0.053 ≈5% ITM Gamma 0.006 Theta -0.158 Vega 0.008 Open interest 0 Model this put
0	—	—	—	—		—	-0.077	152.1%	—	0
Call · $54.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $54.5 Snapshot session Unknown Last — Breakeven — Implied vol 152.1% Delta -0.077 ≈8% ITM Gamma 0.011 Theta -0.166 Vega 0.014 Open interest 0 Model this put
0	—	64%	0.983	—		—	-0.084	101.1%	—	1
Call · $59.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 64% Delta 0.983 ≈98% ITM Gamma 0.007 Theta -0.02 Vega 0.004 Open interest 0 Model this call Put · $59.5 Snapshot session Unknown Last — Breakeven — Implied vol 101.1% Delta -0.084 ≈8% ITM Gamma 0.017 Theta -0.118 Vega 0.015 Open interest 1 Model this put
0	2	—	—	$15.05		$0.15	-0.078	73.9%	1	1
Call · $62 In the money Snapshot session Jul 28, 2026 Last $15.05 Breakeven $77.05 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $62 Snapshot session Jul 21, 2026 Last $0.15 Breakeven $61.85 Implied vol 73.9% Delta -0.078 ≈8% ITM Gamma 0.022 Theta -0.082 Vega 0.015 Open interest 1 Model this put
2	2	36.6%	0.974	$7.80		$0.30	-0.1	56.1%	14	19
Call · $64.5 In the money Snapshot session Aug 6, 2026 Last $7.80 Breakeven $72.30 Implied vol 36.6% Delta 0.974 ≈97% ITM Gamma 0.018 Theta -0.018 Vega 0.004 Open interest 2 Model this call Put · $64.5 Snapshot session Jul 21, 2026 Last $0.30 Breakeven $64.20 Implied vol 56.1% Delta -0.1 ≈10% ITM Gamma 0.035 Theta -0.074 Vega 0.015 Open interest 19 Model this put
3	1	39.4%	0.852	$5.15		$0.20	-0.104	32.4%	1	559
Call · $67 In the money Snapshot session Aug 7, 2026 Last $5.15 Breakeven $72.15 Implied vol 39.4% Delta 0.852 ≈85% ITM Gamma 0.065 Theta -0.07 Vega 0.023 Open interest 3 Model this call Put · $67 Snapshot session Aug 13, 2026 Last $0.20 Breakeven $66.80 Implied vol 32.4% Delta -0.104 ≈10% ITM Gamma 0.062 Theta -0.044 Vega 0.015 Open interest 559 Model this put
134	34	37.9%	0.628	$1.10		$0.76	-0.373	38.4%	21	85
Call · $69.5 In the money Snapshot session Aug 13, 2026 Last $1.10 Breakeven $70.60 Implied vol 37.9% Delta 0.628 ≈63% ITM Gamma 0.112 Theta -0.111 Vega 0.035 Open interest 134 Model this call Put · $69.5 Snapshot session Aug 12, 2026 Last $0.76 Breakeven $68.74 Implied vol 38.4% Delta -0.373 ≈37% ITM Gamma 0.111 Theta -0.111 Vega 0.035 Open interest 85 Model this put
Underlying $70.51
137	3	27.2%	0.281	$0.37		$1.75	-0.714	27.8%	10	96
Call · $72 Snapshot session Aug 12, 2026 Last $0.37 Breakeven $72.37 Implied vol 27.2% Delta 0.281 ≈28% ITM Gamma 0.139 Theta -0.07 Vega 0.032 Open interest 137 Model this call Put · $72 In the money Snapshot session Aug 13, 2026 Last $1.75 Breakeven $70.25 Implied vol 27.8% Delta -0.714 ≈71% ITM Gamma 0.137 Theta -0.071 Vega 0.032 Open interest 96 Model this put
70	1	33.5%	0.104	$0.95		$4.04	—	—	1	33
Call · $74.5 Snapshot session Aug 14, 2026 Last $0.95 Breakeven $75.45 Implied vol 33.5% Delta 0.104 ≈10% ITM Gamma 0.06 Theta -0.046 Vega 0.016 Open interest 70 Model this call Put · $74.5 In the money Snapshot session Aug 14, 2026 Last $4.04 Breakeven $70.46 Implied vol — Delta — Gamma — Theta — Vega — Open interest 33 Model this put
216	10	46.2%	0.069	$0.05		$1.70	-0.854	63.9%	18	1
Call · $77 Snapshot session Aug 12, 2026 Last $0.05 Breakeven $77.05 Implied vol 46.2% Delta 0.069 ≈7% ITM Gamma 0.032 Theta -0.047 Vega 0.01 Open interest 216 Model this call Put · $77 In the money Snapshot session Jul 28, 2026 Last $1.70 Breakeven $75.30 Implied vol 63.9% Delta -0.854 ≈85% ITM Gamma 0.041 Theta -0.111 Vega 0.025 Open interest 1 Model this put
26	4	88.7%	0.156	$0.05		$3.16	-0.946	57.6%	1	6
Call · $79.5 Snapshot session Aug 6, 2026 Last $0.05 Breakeven $79.55 Implied vol 88.7% Delta 0.156 ≈16% ITM Gamma 0.03 Theta -0.163 Vega 0.025 Open interest 26 Model this call Put · $79.5 In the money Snapshot session Jul 28, 2026 Last $3.16 Breakeven $76.34 Implied vol 57.6% Delta -0.946 ≈95% ITM Gamma 0.022 Theta -0.046 Vega 0.01 Open interest 6 Model this put
28	1	78.3%	0.036	$0.13		—	-0.947	85.4%	—	0
Call · $84.5 Snapshot session Aug 3, 2026 Last $0.13 Breakeven $84.63 Implied vol 78.3% Delta 0.036 ≈4% ITM Gamma 0.011 Theta -0.048 Vega 0.01 Open interest 28 Model this call Put · $84.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 85.4% Delta -0.947 ≈95% ITM Gamma 0.014 Theta -0.068 Vega 0.01 Open interest 0 Model this put
0	—	—	—	—		—	-0.923	126.2%	—	0
Call · $89.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $89.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 126.2% Delta -0.923 ≈92% ITM Gamma 0.013 Theta -0.137 Vega 0.01 Open interest 0 Model this put
1	1	—	—	$0.23		—	-0.97	119%	—	0
Call · $94.5 Snapshot session Jul 13, 2026 Last $0.23 Breakeven $94.73 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $94.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 119% Delta -0.97 ≈97% ITM Gamma 0.007 Theta -0.059 Vega 0.005 Open interest 0 Model this put
1	2	—	—	$0.10		—	-0.973	135.6%	—	0
Call · $99.5 Snapshot session Jul 13, 2026 Last $0.10 Breakeven $99.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $99.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 135.6% Delta -0.973 ≈97% ITM Gamma 0.005 Theta -0.061 Vega 0.005 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 · Jul 13, 2026–Aug 14, 2026; 13 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 11544 CUSIP 084423102 13F (30d) 889 filings 830 filers Visit website Investor relations