ZS PHARMA INC

CUSIP: 98979G105 Class: Cmn

RTW INVESTMENTS, LP's Holding History (CIK: 0001493215)

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

Q1 2015
Shares 71,315 Value ($000) $3,001 Avg Close — Range —
Q4 2014
Shares 374,821 Value ($000) $15,581 Avg Close — Range —