MBX · MBX Biosciences, Inc.

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$68.57 +1.49 (+2.22%) At close · Aug 14

Market Cap

$3.30B

48.16M

Options Chain

Underlying $68.57 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 4 days to expiry · 38 contracts · mixed snapshot sessions · Jun 26, 2026–Aug 14, 2026; 14 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 4d Sep 18 32d Oct 16 60d Dec 18 123d Jan 15 151d Jan 21 522d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	523.3%	0.99	—		—	—	—	—	0
Call · $20 In the money Snapshot session Unknown Last — Breakeven — Implied vol 523.3% Delta 0.99 ≈99% ITM Gamma 0.001 Theta -0.11 Vega 0.002 Open interest 0 Model this call Put · $20 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	475.3%	0.989	—		—	-0.02	557.2%	—	0
Call · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 475.3% Delta 0.989 ≈99% ITM Gamma 0.001 Theta -0.109 Vega 0.002 Open interest 0 Model this call Put · $22.5 Snapshot session Unknown Last — Breakeven — Implied vol 557.2% Delta -0.02 ≈2% ITM Gamma 0.001 Theta -0.218 Vega 0.004 Open interest 0 Model this put
0	—	432.7%	0.988	—		—	-0.025	524%	—	0
Call · $25 In the money Snapshot session Unknown Last — Breakeven — Implied vol 432.7% Delta 0.988 ≈99% ITM Gamma 0.001 Theta -0.108 Vega 0.002 Open interest 0 Model this call Put · $25 Snapshot session Unknown Last — Breakeven — Implied vol 524% Delta -0.025 ≈2% ITM Gamma 0.001 Theta -0.244 Vega 0.005 Open interest 0 Model this put
3	1	359.7%	0.986	$32.30		—	-0.027	423.8%	—	0
Call · $30 In the money Snapshot session Jul 24, 2026 Last $32.30 Breakeven $62.30 Implied vol 359.7% Delta 0.986 ≈99% ITM Gamma 0.001 Theta -0.106 Vega 0.003 Open interest 3 Model this call Put · $30 Snapshot session Unknown Last — Breakeven — Implied vol 423.8% Delta -0.027 ≈3% ITM Gamma 0.002 Theta -0.211 Vega 0.005 Open interest 0 Model this put
0	2	298.5%	0.983	$20.00		$1.35	-0.032	353.3%	1	1
Call · $35 In the money Snapshot session Jun 29, 2026 Last $20.00 Breakeven $55.00 Implied vol 298.5% Delta 0.983 ≈98% ITM Gamma 0.002 Theta -0.103 Vega 0.003 Open interest 0 Model this call Put · $35 Snapshot session Jun 26, 2026 Last $1.35 Breakeven $33.65 Implied vol 353.3% Delta -0.032 ≈3% ITM Gamma 0.003 Theta -0.206 Vega 0.006 Open interest 1 Model this put
18	5	229.6%	0.985	$26.21		—	-0.039	292.8%	—	0
Call · $40 In the money Snapshot session Aug 10, 2026 Last $26.21 Breakeven $66.21 Implied vol 229.6% Delta 0.985 ≈98% ITM Gamma 0.002 Theta -0.074 Vega 0.003 Open interest 18 Model this call Put · $40 Snapshot session Unknown Last — Breakeven — Implied vol 292.8% Delta -0.039 ≈4% ITM Gamma 0.004 Theta -0.2 Vega 0.006 Open interest 0 Model this put
6	1	184.4%	0.982	$23.50		$3.30	-0.048	239.7%	10	10
Call · $45 In the money Snapshot session Aug 14, 2026 Last $23.50 Breakeven $68.50 Implied vol 184.4% Delta 0.982 ≈98% ITM Gamma 0.003 Theta -0.071 Vega 0.003 Open interest 6 Model this call Put · $45 Snapshot session Jun 30, 2026 Last $3.30 Breakeven $41.70 Implied vol 239.7% Delta -0.048 ≈5% ITM Gamma 0.005 Theta -0.194 Vega 0.007 Open interest 10 Model this put
17	5	—	—	$16.50		$1.30	-0.075	206.4%	1	122
Call · $50 In the money Snapshot session Aug 10, 2026 Last $16.50 Breakeven $66.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 17 Model this call Put · $50 Snapshot session Aug 10, 2026 Last $1.30 Breakeven $48.70 Implied vol 206.4% Delta -0.075 ≈8% ITM Gamma 0.009 Theta -0.236 Vega 0.012 Open interest 122 Model this put
38	2	—	—	$13.82		$0.15	-0.188	262.8%	1	100
Call · $55 In the money Snapshot session Aug 14, 2026 Last $13.82 Breakeven $68.82 Implied vol — Delta — Gamma — Theta — Vega — Open interest 38 Model this call Put · $55 Snapshot session Aug 14, 2026 Last $0.15 Breakeven $54.85 Implied vol 262.8% Delta -0.188 ≈19% ITM Gamma 0.013 Theta -0.584 Vega 0.024 Open interest 100 Model this put
29	1	—	—	$10.20		$1.80	-0.242	196.1%	50	113
Call · $60 In the money Snapshot session Aug 6, 2026 Last $10.20 Breakeven $70.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 29 Model this call Put · $60 Snapshot session Aug 10, 2026 Last $1.80 Breakeven $58.20 Implied vol 196.1% Delta -0.242 ≈24% ITM Gamma 0.02 Theta -0.496 Vega 0.026 Open interest 113 Model this put
19	4	81.8%	0.73	$4.80		$2.00	-0.335	134.6%	4	76
Call · $65 In the money Snapshot session Aug 13, 2026 Last $4.80 Breakeven $69.80 Implied vol 81.8% Delta 0.73 ≈73% ITM Gamma 0.051 Theta -0.224 Vega 0.027 Open interest 19 Model this call Put · $65 Snapshot session Aug 13, 2026 Last $2.00 Breakeven $63.00 Implied vol 134.6% Delta -0.335 ≈34% ITM Gamma 0.035 Theta -0.402 Vega 0.031 Open interest 76 Model this put
Underlying $68.57
20	3	90.8%	0.446	$4.35		$3.10	-0.553	92.4%	5	5
Call · $70 Snapshot session Aug 5, 2026 Last $4.35 Breakeven $74.35 Implied vol 90.8% Delta 0.446 ≈45% ITM Gamma 0.055 Theta -0.295 Vega 0.032 Open interest 20 Model this call Put · $70 In the money Snapshot session Aug 12, 2026 Last $3.10 Breakeven $66.90 Implied vol 92.4% Delta -0.553 ≈55% ITM Gamma 0.054 Theta -0.293 Vega 0.032 Open interest 5 Model this put
13	1	151.3%	0.339	$0.40		—	-0.759	102%	—	0
Call · $75 Snapshot session Aug 13, 2026 Last $0.40 Breakeven $75.40 Implied vol 151.3% Delta 0.339 ≈34% ITM Gamma 0.031 Theta -0.452 Vega 0.029 Open interest 13 Model this call Put · $75 In the money Snapshot session Unknown Last — Breakeven — Implied vol 102% Delta -0.759 ≈76% ITM Gamma 0.039 Theta -0.257 Vega 0.022 Open interest 0 Model this put
10	2	116%	0.14	$2.45		$21.87	-0.865	114.3%	1	0
Call · $80 Snapshot session Aug 5, 2026 Last $2.45 Breakeven $82.45 Implied vol 116% Delta 0.14 ≈14% ITM Gamma 0.024 Theta -0.212 Vega 0.015 Open interest 10 Model this call Put · $80 In the money Snapshot session Jul 28, 2026 Last $21.87 Breakeven $58.13 Implied vol 114.3% Delta -0.865 ≈86% ITM Gamma 0.024 Theta -0.198 Vega 0.015 Open interest 0 Model this put
14	10	131.7%	0.091	$1.07		$26.70	-0.921	126.8%	2	0
Call · $85 Snapshot session Jul 17, 2026 Last $1.07 Breakeven $86.07 Implied vol 131.7% Delta 0.091 ≈9% ITM Gamma 0.016 Theta -0.176 Vega 0.016 Open interest 14 Model this call Put · $85 In the money Snapshot session Jul 13, 2026 Last $26.70 Breakeven $58.30 Implied vol 126.8% Delta -0.921 ≈92% ITM Gamma 0.015 Theta -0.147 Vega 0.015 Open interest 0 Model this put
2	2	162%	0.085	$1.29		—	-0.932	150%	—	0
Call · $90 Snapshot session Jul 13, 2026 Last $1.29 Breakeven $91.29 Implied vol 162% Delta 0.085 ≈9% ITM Gamma 0.012 Theta -0.207 Vega 0.016 Open interest 2 Model this call Put · $90 In the money Snapshot session Unknown Last — Breakeven — Implied vol 150% Delta -0.932 ≈93% ITM Gamma 0.011 Theta -0.155 Vega 0.009 Open interest 0 Model this put
1	1	199.7%	0.097	$1.15		—	-0.968	147.4%	—	0
Call · $95 Snapshot session Jul 10, 2026 Last $1.15 Breakeven $96.15 Implied vol 199.7% Delta 0.097 ≈10% ITM Gamma 0.011 Theta -0.279 Vega 0.017 Open interest 1 Model this call Put · $95 In the money Snapshot session Unknown Last — Breakeven — Implied vol 147.4% Delta -0.968 ≈97% ITM Gamma 0.006 Theta -0.08 Vega 0.005 Open interest 0 Model this put
0	—	—	—	—		$35.10	-0.944	192.2%	1	0
Call · $100 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $100 In the money Snapshot session Aug 6, 2026 Last $35.10 Breakeven $64.90 Implied vol 192.2% Delta -0.944 ≈94% ITM Gamma 0.007 Theta -0.168 Vega 0.01 Open interest 0 Model this put
0	—	—	—	—		—	-0.948	211.7%	—	0
Call · $105 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $105 In the money Snapshot session Unknown Last — Breakeven — Implied vol 211.7% Delta -0.948 ≈95% ITM Gamma 0.006 Theta -0.175 Vega 0.01 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 26, 2026–Aug 14, 2026; 14 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 1776111 CUSIP 55287L101 13F (30d) 175 filings 171 filers Visit website Investor relations