SIGMA ALDRICH CORP

CUSIP: 826552101 Class: COM

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

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

Q3 2015
Shares 604,832 Value ($000) $84,023 Avg Close — Range —
Q2 2015
Shares 500,000 Value ($000) $69,675 Avg Close — Range —
Q1 2015
Shares 322,039 Value ($000) $44,522 Avg Close — Range —
Q4 2014
Shares 250,000 Value ($000) $34,318 Avg Close — Range —
Q2 2014
Shares 317,192 Value ($000) $32,189 Avg Close — Range —
Q1 2014
Shares 243,885 Value ($000) $22,774 Avg Close — Range —
Q4 2013
Shares 75,000 Value ($000) $7,051 Avg Close — Range —