KRRO · Korro Bio, Inc.

Track KRRO — free

$12.96 -0.99 (-7.10%) At close · Aug 20

Market Cap

$205.42M

14.73M

Options Chain

Underlying $12.96 · at close Aug 20, 2026 Options Calculator

Positioning

Aug 21, 2026 · expires today · 20 contracts · mixed snapshot sessions · Jul 7, 2026–Aug 20, 2026; 16 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

—

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 Dec 18 119d Jan 15 147d Apr 16 238d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	—	0%	1	—		—	—	—	—	0
Call · $2.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this call Put · $2.5 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	0%	1	—		$0.05	—	—	76	34
Call · $5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta 0 Vega 0 Open interest 0 Model this call Put · $5 Snapshot session Jul 30, 2026 Last $0.05 Breakeven $4.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 34 Model this put
0	—	0%	1	—		—	-0.127	1356.1%	—	0
Call · $7.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol 0% Delta 1 ≈100% ITM Gamma 0 Theta -0.001 Vega 0 Open interest 0 Model this call Put · $7.5 Snapshot session Unknown Last — Breakeven — Implied vol 1356.1% Delta -0.127 ≈13% ITM Gamma 0.031 Theta -1.145 Vega 0.001 Open interest 0 Model this put
0	—	1262.6%	0.738	—		$0.80	-0.198	666.3%	100	663
Call · $10 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1262.6% Delta 0.738 ≈74% ITM Gamma 0.052 Theta -1.693 Vega 0.002 Open interest 0 Model this call Put · $10 Snapshot session Jul 29, 2026 Last $0.80 Breakeven $9.20 Implied vol 666.3% Delta -0.198 ≈20% ITM Gamma 0.084 Theta -0.757 Vega 0.002 Open interest 663 Model this put
118	2	333.6%	0.446	$0.80		—	-0.747	100.4%	—	0
Call · $12.5 In the money Snapshot session Aug 20, 2026 Last $0.80 Breakeven $13.30 Implied vol 333.6% Delta 0.446 ≈45% ITM Gamma 0.237 Theta -0.534 Vega 0.002 Open interest 118 Model this call Put · $12.5 Snapshot session Unknown Last — Breakeven — Implied vol 100.4% Delta -0.747 ≈75% ITM Gamma 0.642 Theta -0.13 Vega 0.002 Open interest 0 Model this put
Underlying $12.96
0	—	634.8%	0.251	—		—	—	—	—	0
Call · $15 Snapshot session Unknown Last — Breakeven — Implied vol 634.8% Delta 0.251 ≈25% ITM Gamma 0.101 Theta -0.822 Vega 0.001 Open interest 0 Model this call Put · $15 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
10	10	868.6%	0.201	$1.00		—	—	—	—	0
Call · $17.5 Snapshot session Jul 7, 2026 Last $1.00 Breakeven $18.50 Implied vol 868.6% Delta 0.201 ≈20% ITM Gamma 0.065 Theta -0.988 Vega 0.002 Open interest 10 Model this call Put · $17.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	1060.6%	0.177	—		—	—	—	—	0
Call · $20 Snapshot session Unknown Last — Breakeven — Implied vol 1060.6% Delta 0.177 ≈18% ITM Gamma 0.049 Theta -1.122 Vega 0.001 Open interest 0 Model this call Put · $20 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	1202.2%	0.161	—		—	—	—	—	0
Call · $22.5 Snapshot session Unknown Last — Breakeven — Implied vol 1202.2% Delta 0.161 ≈16% ITM Gamma 0.04 Theta -1.187 Vega 0.001 Open interest 0 Model this call Put · $22.5 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	1329.8%	0.151	—		—	—	—	—	0
Call · $25 Snapshot session Unknown Last — Breakeven — Implied vol 1329.8% Delta 0.151 ≈15% ITM Gamma 0.035 Theta -1.25 Vega 0.001 Open interest 0 Model this call Put · $25 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 · Jul 7, 2026–Aug 20, 2026; 16 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 1703647 CUSIP 500946108 13F (30d) 104 filings 102 filers Visit website Investor relations