ALEC · Alector, Inc.

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$1.52 +0.00 (+0.00%) At close · Jul 29

Market Cap

$168.76M

111.03M

Options Chain

15-min delayed Underlying $1.52 · at close Jul 29, 2026 Options Calculator

Positioning

Aug 21, 2026 · 22 days to expiry · 6 contracts

Put / call OI

0.03

Call-heavy positioning

Open interest

contracts outstanding

Volume

traded today

Max pain

$2.50

$0.98 above spot

ATM implied vol

372.1%

market's expected move

Open interest by strike

Calls Puts

2.5

7.5

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 22d Sep 18 50d Oct 16 78d Jan 15 169d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
Underlying $1.52
33	4	549.2%	0.621	$0.05		$0.90	-0.785	195%	1	1
Call · $2.5 Last $0.05 Breakeven $2.55 Implied vol 549.2% Delta 0.621 ≈62% ITM Gamma 0.182 Theta -0.018 Vega 0.002 Open interest 33 Model this call Put · $2.5 In the money Last $0.90 Breakeven $1.60 Implied vol 195% Delta -0.785 ≈79% ITM Gamma 0.402 Theta -0.005 Vega 0.001 Open interest 1 Model this put
0	—	548.9%	0.426	—		—	-0.779	385.5%	—	0
Call · $5 Last — Breakeven — Implied vol 548.9% Delta 0.426 ≈43% ITM Gamma 0.184 Theta -0.018 Vega 0.001 Open interest 0 Model this call Put · $5 In the money Last — Breakeven — Implied vol 385.5% Delta -0.779 ≈78% ITM Gamma 0.204 Theta -0.009 Vega 0.001 Open interest 0 Model this put
4	1	458.8%	0.2	$0.10		—	-0.797	463.1%	—	0
Call · $7.5 Last $0.10 Breakeven $7.60 Implied vol 458.8% Delta 0.2 ≈20% ITM Gamma 0.158 Theta -0.011 Vega 0.001 Open interest 4 Model this call Put · $7.5 In the money Last — Breakeven — Implied vol 463.1% Delta -0.797 ≈80% ITM Gamma 0.162 Theta -0.011 Vega 0.001 Open interest 0 Model this put

About this data

Greeks, implied volatility, open interest and the last price come from the latest daily snapshot and are 15-minute delayed. 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. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 1653087 CUSIP 014442107 13F (30d) 20 filings 20 filers Visit website Investor relations