ZBIO · Zenas BioPharma, Inc.

Track ZBIO — free

$31.96 +0.34 (+1.08%)

Market Cap

$2.06B

65.18M

Options Chain

Underlying $31.96 · today Options Calculator

Positioning

Aug 21, 2026 · expires today · 32 contracts · mixed snapshot sessions · Dec 19, 2025–Aug 21, 2026; 15 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 0d Sep 18 28d Oct 16 56d Nov 20 91d Dec 18 119d Jan 15 147d Feb 19 182d Mar 19 210d Dec 17 483d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	—	—	—		$0.03	—	—	72	20
Call · $2.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $2.5 Snapshot session Jul 27, 2026 Last $0.03 Breakeven $2.47 Implied vol — Delta — Gamma — Theta — Vega — Open interest 20 Model this put
0	—	—	—	—		$0.03	—	—	10	0
Call · $5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $5 Snapshot session Jul 28, 2026 Last $0.03 Breakeven $4.97 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$0.05	—	—	58	0
Call · $7.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $7.5 Snapshot session Jul 29, 2026 Last $0.05 Breakeven $7.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		$0.05	0	0%	38	9
Call · $10 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $10 Snapshot session Aug 6, 2026 Last $0.05 Breakeven $9.95 Implied vol 0% Delta 0 ≈0% ITM Gamma 0 Theta 0 Vega 0 Open interest 9 Model this put
0	—	—	—	—		—	0	0%	—	0
Call · $12.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $12.5 Snapshot session Unknown Last — Breakeven — Implied vol 0% Delta 0 ≈0% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this put
0	—	—	—	—		—	-0.045	1693%	—	0
Call · $15 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $15 Snapshot session Unknown Last — Breakeven — Implied vol 1693% Delta -0.045 ≈5% ITM Gamma 0.005 Theta -2.233 Vega 0.001 Open interest 0 Model this put
1	1	—	—	$15.00		$2.85	0	0%	2	50
Call · $17.5 In the money Snapshot session Aug 11, 2026 Last $15.00 Breakeven $32.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $17.5 Snapshot session Jun 3, 2026 Last $2.85 Breakeven $14.65 Implied vol 0% Delta 0 ≈0% ITM Gamma 0 Theta 0 Vega 0 Open interest 50 Model this put
26	1	—	—	$12.50		$3.75	0	0%	1	0
Call · $20 In the money Snapshot session Jul 21, 2026 Last $12.50 Breakeven $32.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 26 Model this call Put · $20 Snapshot session May 11, 2026 Last $3.75 Breakeven $16.25 Implied vol 0% Delta 0 ≈0% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this put
12	1	—	—	$6.91		$5.25	-0.083	917.3%	2	1
Call · $22.5 In the money Snapshot session Aug 13, 2026 Last $6.91 Breakeven $29.41 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 Model this call Put · $22.5 Snapshot session Jun 12, 2026 Last $5.25 Breakeven $17.25 Implied vol 917.3% Delta -0.083 ≈8% ITM Gamma 0.016 Theta -1.932 Vega 0.002 Open interest 1 Model this put
1k	5	—	—	$3.67		$7.10	-0.105	718.6%	2	1
Call · $25 In the money Snapshot session Aug 13, 2026 Last $3.67 Breakeven $28.67 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1k Model this call Put · $25 Snapshot session Apr 22, 2026 Last $7.10 Breakeven $17.90 Implied vol 718.6% Delta -0.105 ≈11% ITM Gamma 0.024 Theta -1.821 Vega 0.002 Open interest 1 Model this put
74	21	190.9%	0.908	$2.50		$0.40	-0.247	400.1%	1	265
Call · $30 In the money Snapshot session Aug 21, 2026 Last $2.50 Breakeven $32.50 Implied vol 190.9% Delta 0.908 ≈91% ITM Gamma 0.082 Theta -0.437 Vega 0.002 Open interest 74 Model this call Put · $30 Snapshot session Aug 19, 2026 Last $0.40 Breakeven $29.60 Implied vol 400.1% Delta -0.247 ≈25% ITM Gamma 0.075 Theta -1.744 Vega 0.004 Open interest 265 Model this put
Underlying $31.96
75	1	336.2%	0.266	$0.10		—	-0.796	261%	—	0
Call · $35 Snapshot session Aug 20, 2026 Last $0.10 Breakeven $35.10 Implied vol 336.2% Delta 0.266 ≈27% ITM Gamma 0.094 Theta -1.531 Vega 0.004 Open interest 75 Model this call Put · $35 In the money Snapshot session Unknown Last — Breakeven — Implied vol 261% Delta -0.796 ≈80% ITM Gamma 0.103 Theta -1.018 Vega 0.003 Open interest 0 Model this put
0	—	567.2%	0.148	—		—	-0.811	647.5%	—	0
Call · $40 Snapshot session Unknown Last — Breakeven — Implied vol 567.2% Delta 0.148 ≈15% ITM Gamma 0.039 Theta -1.823 Vega 0.002 Open interest 0 Model this call Put · $40 In the money Snapshot session Unknown Last — Breakeven — Implied vol 647.5% Delta -0.811 ≈81% ITM Gamma 0.04 Theta -2.41 Vega 0.003 Open interest 0 Model this put
1	1	807.3%	0.134	$6.50		—	-0.853	845.8%	—	0
Call · $45 Snapshot session Dec 19, 2025 Last $6.50 Breakeven $51.50 Implied vol 807.3% Delta 0.134 ≈13% ITM Gamma 0.025 Theta -2.397 Vega 0.002 Open interest 1 Model this call Put · $45 In the money Snapshot session Unknown Last — Breakeven — Implied vol 845.8% Delta -0.853 ≈85% ITM Gamma 0.026 Theta -2.683 Vega 0.002 Open interest 0 Model this put
1	1	935.7%	0.101	$4.80		—	-0.872	1016.2%	—	0
Call · $50 Snapshot session Dec 19, 2025 Last $4.80 Breakeven $54.80 Implied vol 935.7% Delta 0.101 ≈10% ITM Gamma 0.018 Theta -2.276 Vega 0.002 Open interest 1 Model this call Put · $50 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1016.2% Delta -0.872 ≈87% ITM Gamma 0.019 Theta -2.906 Vega 0.002 Open interest 0 Model this put
0	—	1785.7%	0.271	—		—	-0.885	1171%	—	0
Call · $55 Snapshot session Unknown Last — Breakeven — Implied vol 1785.7% Delta 0.271 ≈27% ITM Gamma 0.017 Theta -8.13 Vega 0.003 Open interest 0 Model this call Put · $55 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1171% Delta -0.885 ≈88% ITM Gamma 0.016 Theta -3.125 Vega 0.002 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 · Dec 19, 2025–Aug 21, 2026; 15 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 1953926 CUSIP 98937L105 13F (30d) 140 filings 139 filers Visit website Investor relations