ALT · Altimmune, Inc.

Track ALT — free

$2.94 +0.06 (+2.08%) At close · Aug 14

Market Cap

$571.88M

194.52M

Options Chain

Underlying $2.94 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 24 contracts · mixed snapshot sessions · Jun 18, 2026–Aug 14, 2026; 1 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 Aug 28 12d Sep 4 19d Sep 11 26d Sep 18 33d Sep 25 40d Oct 2 47d Dec 18 124d Jan 15 152d Mar 19 215d Jan 21 523d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
484	1	—	—	$2.42		$0.10	—	—	4	0
Call · $0.5 In the money Snapshot session Aug 14, 2026 Last $2.42 Breakeven $2.92 Implied vol — Delta — Gamma — Theta — Vega — Open interest 484 Model this call Put · $0.5 Snapshot session Jun 18, 2026 Last $0.10 Breakeven $0.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
230	1	—	—	$1.92		$0.05	-0.07	1231%	4	39
Call · $1 In the money Snapshot session Aug 14, 2026 Last $1.92 Breakeven $2.92 Implied vol — Delta — Gamma — Theta — Vega — Open interest 230 Model this call Put · $1 Snapshot session Aug 4, 2026 Last $0.05 Breakeven $0.95 Implied vol 1231% Delta -0.07 ≈7% ITM Gamma 0.03 Theta -0.056 Vega 0.001 Open interest 39 Model this put
76	2	248.2%	0.992	$1.72		$0.05	—	—	10	9
Call · $1.5 In the money Snapshot session Aug 12, 2026 Last $1.72 Breakeven $3.22 Implied vol 248.2% Delta 0.992 ≈99% ITM Gamma 0.023 Theta -0.002 Vega 0 Open interest 76 Model this call Put · $1.5 Snapshot session Jul 31, 2026 Last $0.05 Breakeven $1.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 9 Model this put
11	1	232.5%	0.935	$1.12		$0.15	—	—	2	1
Call · $2 In the money Snapshot session Aug 10, 2026 Last $1.12 Breakeven $3.12 Implied vol 232.5% Delta 0.935 ≈94% ITM Gamma 0.152 Theta -0.01 Vega 0.001 Open interest 11 Model this call Put · $2 Snapshot session Jun 18, 2026 Last $0.15 Breakeven $1.85 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this put
454	30	—	—	$0.40		$0.15	-0.191	177.8%	2	542
Call · $2.5 In the money Snapshot session Aug 13, 2026 Last $0.40 Breakeven $2.90 Implied vol — Delta — Gamma — Theta — Vega — Open interest 454 Model this call Put · $2.5 Snapshot session Jul 24, 2026 Last $0.15 Breakeven $2.35 Implied vol 177.8% Delta -0.191 ≈19% ITM Gamma 0.433 Theta -0.016 Vega 0.001 Open interest 542 Model this put
Underlying $2.94
2.5k	92	67.5%	0.433	$0.10		$0.13	-0.547	83.7%	736	1.5k
Call · $3 Snapshot session Aug 14, 2026 Last $0.10 Breakeven $3.10 Implied vol 67.5% Delta 0.433 ≈43% ITM Gamma 1.629 Theta -0.009 Vega 0.001 Open interest 2.5k Model this call Put · $3 In the money Snapshot session Aug 14, 2026 Last $0.13 Breakeven $2.87 Implied vol 83.7% Delta -0.547 ≈55% ITM Gamma 1.326 Theta -0.011 Vega 0.001 Open interest 1.5k Model this put
13.5k	1	192.3%	0.266	$0.03		$0.64	—	—	100	114
Call · $3.5 Snapshot session Aug 14, 2026 Last $0.03 Breakeven $3.53 Implied vol 192.3% Delta 0.266 ≈27% ITM Gamma 0.485 Theta -0.021 Vega 0.001 Open interest 13.5k Model this call Put · $3.5 In the money Snapshot session Aug 14, 2026 Last $0.64 Breakeven $2.86 Implied vol — Delta — Gamma — Theta — Vega — Open interest 114 Model this put
998	1	238.4%	0.181	$0.05		$1.17	-0.914	173.2%	10	11
Call · $4 Snapshot session Aug 13, 2026 Last $0.05 Breakeven $4.05 Implied vol 238.4% Delta 0.181 ≈18% ITM Gamma 0.31 Theta -0.021 Vega 0.001 Open interest 998 Model this call Put · $4 In the money Snapshot session Jul 16, 2026 Last $1.17 Breakeven $2.83 Implied vol 173.2% Delta -0.914 ≈91% ITM Gamma 0.258 Theta -0.009 Vega 0.001 Open interest 11 Model this put
140	5	322.1%	0.186	$0.05		$1.43	-0.929	218.6%	6	2
Call · $4.5 Snapshot session Jul 24, 2026 Last $0.05 Breakeven $4.55 Implied vol 322.1% Delta 0.186 ≈19% ITM Gamma 0.234 Theta -0.029 Vega 0.001 Open interest 140 Model this call Put · $4.5 In the money Snapshot session Jul 21, 2026 Last $1.43 Breakeven $3.07 Implied vol 218.6% Delta -0.929 ≈93% ITM Gamma 0.176 Theta -0.01 Vega 0 Open interest 2 Model this put
293	50	368.1%	0.169	$0.01		$2.05	-0.895	304.8%	2	2
Call · $5 Snapshot session Aug 6, 2026 Last $0.01 Breakeven $5.01 Implied vol 368.1% Delta 0.169 ≈17% ITM Gamma 0.192 Theta -0.031 Vega 0.001 Open interest 293 Model this call Put · $5 In the money Snapshot session Aug 13, 2026 Last $2.05 Breakeven $2.95 Implied vol 304.8% Delta -0.895 ≈89% ITM Gamma 0.168 Theta -0.018 Vega 0.001 Open interest 2 Model this put
6	1	—	—	$0.08		$2.57	-0.872	376.3%	1	0
Call · $5.5 Snapshot session Aug 6, 2026 Last $0.08 Breakeven $5.58 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 Model this call Put · $5.5 In the money Snapshot session Aug 13, 2026 Last $2.57 Breakeven $2.93 Implied vol 376.3% Delta -0.872 ≈87% ITM Gamma 0.155 Theta -0.026 Vega 0.001 Open interest 0 Model this put
0	—	—	—	—		$3.07	—	—	1	0
Call · $6 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $6 In the money Snapshot session Aug 13, 2026 Last $3.07 Breakeven $2.93 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 18, 2026–Aug 14, 2026; 1 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 1326190 CUSIP 02155H200 13F (30d) 201 filings 199 filers Visit website Investor relations