SIENNA BIOPHARMACEUTICALS IN

Ticker: SNNAQ CUSIP: 82622H108 Class: COM

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

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

Q2 2018

Shares 27,730 Value ($000) $421 Avg Close $16.98 Range $14.33 - $21.53

Q1 2018

Shares 50,454 Value ($000) $948 Avg Close $17.48 Range $13.37 - $20.99

Q4 2017

Shares 50,909 Value ($000) $924 Avg Close $21.15 Range $15.22 - $26.00

Q3 2017

Shares 50,909 Value ($000) $1,133 Avg Close $21.95 Range $18.50 - $29.25

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	27,730	$421	$16.98	$14.33 - $21.53
Q1 2018	50,454	$948	$17.48	$13.37 - $20.99
Q4 2017	50,909	$924	$21.15	$15.22 - $26.00
Q3 2017	50,909	$1,133	$21.95	$18.50 - $29.25