GRBK · Green Brick Partners, Inc.

Track GRBK — free

$70.46 -0.21 (-0.30%) At close · Aug 14

Market Cap

$3.03B

43.01M

Options Chain

Underlying $70.46 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 34 contracts · mixed snapshot sessions · Feb 27, 2026–Aug 13, 2026; 6 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 Nov 20 96d Feb 19 187d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	8	—	—	$36.40		$0.35	-0.031	346.9%	1	20
Call · $35 In the money Snapshot session Apr 21, 2026 Last $36.40 Breakeven $71.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $35 Snapshot session Apr 13, 2026 Last $0.35 Breakeven $34.65 Implied vol 346.9% Delta -0.031 ≈3% ITM Gamma 0.002 Theta -0.19 Vega 0.006 Open interest 20 Model this put
0	—	183.9%	0.997	—		$0.45	-0.037	289.2%	1	14
Call · $40 In the money Snapshot session Unknown Last — Breakeven — Implied vol 183.9% Delta 0.997 ≈100% ITM Gamma 0.001 Theta -0.019 Vega 0.001 Open interest 0 Model this call Put · $40 Snapshot session May 5, 2026 Last $0.45 Breakeven $39.55 Implied vol 289.2% Delta -0.037 ≈4% ITM Gamma 0.003 Theta -0.184 Vega 0.006 Open interest 14 Model this put
26	52	145.8%	0.996	$20.73		$0.35	-0.048	245.9%	3	21
Call · $45 In the money Snapshot session Mar 12, 2026 Last $20.73 Breakeven $65.73 Implied vol 145.8% Delta 0.996 ≈100% ITM Gamma 0.001 Theta -0.017 Vega 0.001 Open interest 26 Model this call Put · $45 Snapshot session May 27, 2026 Last $0.35 Breakeven $44.65 Implied vol 245.9% Delta -0.048 ≈5% ITM Gamma 0.005 Theta -0.196 Vega 0.007 Open interest 21 Model this put
3	2	111.8%	0.996	$19.71		$0.50	-0.055	193.1%	5	41
Call · $50 In the money Snapshot session Jun 3, 2026 Last $19.71 Breakeven $69.71 Implied vol 111.8% Delta 0.996 ≈100% ITM Gamma 0.001 Theta -0.015 Vega 0.002 Open interest 3 Model this call Put · $50 Snapshot session Jun 12, 2026 Last $0.50 Breakeven $49.50 Implied vol 193.1% Delta -0.055 ≈5% ITM Gamma 0.007 Theta -0.172 Vega 0.013 Open interest 41 Model this put
14	5	81%	0.996	$14.60		$0.48	-0.069	147.2%	1	44
Call · $55 In the money Snapshot session Apr 30, 2026 Last $14.60 Breakeven $69.60 Implied vol 81% Delta 0.996 ≈100% ITM Gamma 0.002 Theta -0.014 Vega 0.002 Open interest 14 Model this call Put · $55 Snapshot session Jun 30, 2026 Last $0.48 Breakeven $54.52 Implied vol 147.2% Delta -0.069 ≈7% ITM Gamma 0.011 Theta -0.156 Vega 0.013 Open interest 44 Model this put
31	4	53%	0.995	$13.20		$0.05	-0.071	94.6%	2	85
Call · $60 In the money Snapshot session Jun 17, 2026 Last $13.20 Breakeven $73.20 Implied vol 53% Delta 0.995 ≈99% ITM Gamma 0.003 Theta -0.012 Vega 0.002 Open interest 31 Model this call Put · $60 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $59.95 Implied vol 94.6% Delta -0.071 ≈7% ITM Gamma 0.017 Theta -0.102 Vega 0.014 Open interest 85 Model this put
6	1	48.4%	0.921	$6.90		$0.10	-0.1	53.2%	1	141
Call · $65 In the money Snapshot session Aug 6, 2026 Last $6.90 Breakeven $71.90 Implied vol 48.4% Delta 0.921 ≈92% ITM Gamma 0.036 Theta -0.062 Vega 0.014 Open interest 6 Model this call Put · $65 Snapshot session Aug 13, 2026 Last $0.10 Breakeven $64.90 Implied vol 53.2% Delta -0.1 ≈10% ITM Gamma 0.038 Theta -0.073 Vega 0.014 Open interest 141 Model this put
38	2	23.3%	0.604	$3.00		$0.85	-0.417	29.8%	1	143
Call · $70 In the money Snapshot session Aug 4, 2026 Last $3.00 Breakeven $73.00 Implied vol 23.3% Delta 0.604 ≈60% ITM Gamma 0.194 Theta -0.076 Vega 0.034 Open interest 38 Model this call Put · $70 Snapshot session Aug 13, 2026 Last $0.85 Breakeven $69.15 Implied vol 29.8% Delta -0.417 ≈42% ITM Gamma 0.154 Theta -0.09 Vega 0.034 Open interest 143 Model this put
Underlying $70.46
65	1	41.5%	0.115	$0.45		$4.05	-0.938	33.7%	1	36
Call · $75 Snapshot session Aug 10, 2026 Last $0.45 Breakeven $75.45 Implied vol 41.5% Delta 0.115 ≈12% ITM Gamma 0.055 Theta -0.065 Vega 0.016 Open interest 65 Model this call Put · $75 In the money Snapshot session Aug 11, 2026 Last $4.05 Breakeven $70.95 Implied vol 33.7% Delta -0.938 ≈94% ITM Gamma 0.046 Theta -0.029 Vega 0.009 Open interest 36 Model this put
86	1	75.9%	0.092	$0.05		$8.50	-0.987	49.2%	3	0
Call · $80 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $80.05 Implied vol 75.9% Delta 0.092 ≈9% ITM Gamma 0.025 Theta -0.1 Vega 0.016 Open interest 86 Model this call Put · $80 In the money Snapshot session Jul 30, 2026 Last $8.50 Breakeven $71.50 Implied vol 49.2% Delta -0.987 ≈99% ITM Gamma 0.011 Theta -0.01 Vega 0.004 Open interest 0 Model this put
45	2	102.5%	0.073	$0.29		$14.00	-0.991	69.3%	2	2
Call · $85 Snapshot session Aug 13, 2026 Last $0.29 Breakeven $85.29 Implied vol 102.5% Delta 0.073 ≈7% ITM Gamma 0.016 Theta -0.114 Vega 0.01 Open interest 45 Model this call Put · $85 In the money Snapshot session Feb 27, 2026 Last $14.00 Breakeven $71.00 Implied vol 69.3% Delta -0.991 ≈99% ITM Gamma 0.006 Theta -0.011 Vega 0.002 Open interest 2 Model this put
42	1	124.4%	0.062	$0.09		$10.80	-0.992	86.4%	2	0
Call · $90 Snapshot session Aug 13, 2026 Last $0.09 Breakeven $90.09 Implied vol 124.4% Delta 0.062 ≈6% ITM Gamma 0.011 Theta -0.12 Vega 0.01 Open interest 42 Model this call Put · $90 In the money Snapshot session Jun 25, 2026 Last $10.80 Breakeven $79.20 Implied vol 86.4% Delta -0.992 ≈99% ITM Gamma 0.004 Theta -0.012 Vega 0.002 Open interest 0 Model this put
7	1	159.8%	0.074	$0.95		—	—	—	—	0
Call · $95 Snapshot session Jun 26, 2026 Last $0.95 Breakeven $95.95 Implied vol 159.8% Delta 0.074 ≈7% ITM Gamma 0.01 Theta -0.179 Vega 0.01 Open interest 7 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
1	1	179.1%	0.067	$0.24		—	—	—	—	0
Call · $100 Snapshot session May 15, 2026 Last $0.24 Breakeven $100.24 Implied vol 179.1% Delta 0.067 ≈7% ITM Gamma 0.008 Theta -0.185 Vega 0.01 Open interest 1 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
31	1	202.2%	0.067	$0.35		—	—	—	—	0
Call · $105 Snapshot session May 26, 2026 Last $0.35 Breakeven $105.35 Implied vol 202.2% Delta 0.067 ≈7% ITM Gamma 0.007 Theta -0.208 Vega 0.011 Open interest 31 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
6	1	224.2%	0.067	$0.15		—	—	—	—	0
Call · $110 Snapshot session May 27, 2026 Last $0.15 Breakeven $110.15 Implied vol 224.2% Delta 0.067 ≈7% ITM Gamma 0.007 Theta -0.231 Vega 0.011 Open interest 6 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
13	1	231.8%	0.054	$0.15		—	—	—	—	0
Call · $115 Snapshot session Jun 4, 2026 Last $0.15 Breakeven $115.15 Implied vol 231.8% Delta 0.054 ≈5% ITM Gamma 0.006 Theta -0.203 Vega 0.011 Open interest 13 Model this call Put · $115 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 · Feb 27, 2026–Aug 13, 2026; 6 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 1373670 CUSIP 392709101 13F (30d) 294 filings 288 filers Visit website Investor relations