ALECTOR INC

Ticker: ALEC CUSIP: 014442107 Class: COM

PERCEPTIVE ADVISORS LLC's Holding History (CIK: 0001224962)

Note: Option positions (PUT/CALL) are excluded.

Q2 2020

Shares 511,731 Value ($000) $12,507 Avg Close $27.60 Range $21.26 - $34.89

Q1 2020

Shares 511,731 Value ($000) $12,348 Avg Close $25.49 Range $15.63 - $35.93

Q4 2019

Shares 511,731 Value ($000) $8,817 Avg Close $17.00 Range $13.71 - $21.03

Q3 2019

Shares 511,731 Value ($000) $7,379 Avg Close $18.05 Range $13.64 - $22.41

Q2 2019

Shares 511,731 Value ($000) $9,325 Avg Close $20.30 Range $15.78 - $27.00

Q1 2019

Shares 511,731 Value ($000) $9,579 Avg Close $18.92 Range $15.16 - $23.84

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	511,731	$12,507	$27.60	$21.26 - $34.89
Q1 2020	511,731	$12,348	$25.49	$15.63 - $35.93
Q4 2019	511,731	$8,817	$17.00	$13.71 - $21.03
Q3 2019	511,731	$7,379	$18.05	$13.64 - $22.41
Q2 2019	511,731	$9,325	$20.30	$15.78 - $27.00
Q1 2019	511,731	$9,579	$18.92	$15.16 - $23.84