DYAX CORP

CUSIP: 26746E103 Class: CMN

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q4 2015
Shares 2,242,073 Value ($000) $84,347 Avg Close — Range —
Q3 2015
Shares 2,857,773 Value ($000) $54,555 Avg Close — Range —
Q2 2015
Shares 2,483,507 Value ($000) $65,813 Avg Close — Range —
Q1 2015
Shares 1,131,414 Value ($000) $18,957 Avg Close — Range —
Q4 2014
Shares 982,745 Value ($000) $13,817 Avg Close — Range —
Q3 2014
Shares 2,954,684 Value ($000) $29,901 Avg Close — Range —
Q2 2014
Shares 3,717,013 Value ($000) $35,683 Avg Close — Range —
Q1 2014
Shares 3,786,478 Value ($000) $34,003 Avg Close — Range —
Q4 2013
Shares 3,357,747 Value ($000) $25,301 Avg Close — Range —
Q3 2013
Shares 4,432,625 Value ($000) $30,408 Avg Close — Range —
Q2 2013
Shares 679,866 Value ($000) $2,352 Avg Close — Range —