ALECTOR INC

Ticker: ALEC CUSIP: 014442107 Class: COM

ADAGE CAPITAL PARTNERS GP, L.L.C.'s Holding History (CIK: 0001165408)

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

Q2 2020

Shares 300,000 Value ($000) $7,332 Avg Close $27.60 Range $21.26 - $34.89

Q1 2020

Shares 400,000 Value ($000) $9,652 Avg Close $25.49 Range $15.63 - $35.93

Q4 2019

Shares 175,000 Value ($000) $3,015 Avg Close $17.00 Range $13.71 - $21.03

Q3 2019

Shares 175,000 Value ($000) $2,524 Avg Close $18.05 Range $13.64 - $22.41

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	300,000	$7,332	$27.60	$21.26 - $34.89
Q1 2020	400,000	$9,652	$25.49	$15.63 - $35.93
Q4 2019	175,000	$3,015	$17.00	$13.71 - $21.03
Q3 2019	175,000	$2,524	$18.05	$13.64 - $22.41