SPERO THERAPEUTICS INC

Ticker: SPRO CUSIP: 84833T103 Class: COM

Alyeska Investment Group, L.P.'s Holding History (CIK: 0001453072)

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

Q1 2021

Shares 49,602 Value ($000) $730 Avg Close $17.60 Range $12.70 - $22.23

Q4 2020

Shares 49,602 Value ($000) $962 Avg Close $15.59 Range $11.03 - $23.64

Q3 2020

Shares 100,000 Value ($000) $1,116 Avg Close $11.83 Range $8.50 - $14.37

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	49,602	$730	$17.60	$12.70 - $22.23
Q4 2020	49,602	$962	$15.59	$11.03 - $23.64
Q3 2020	100,000	$1,116	$11.83	$8.50 - $14.37