DYAX CORP

CUSIP: 26746E103 Class: CMN

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

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

Q4 2015
Shares 115,795 Value ($000) $4,356 Avg Close — Range —
Q3 2015
Shares 115,358 Value ($000) $2,202 Avg Close — Range —
Q2 2015
Shares 559,141 Value ($000) $14,817 Avg Close — Range —
Q1 2015
Shares 1,585,098 Value ($000) $26,558 Avg Close — Range —
Q4 2014
Shares 2,131,808 Value ($000) $29,973 Avg Close — Range —