DYAX CORP

CUSIP: 26746E103 Class: CMN

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2015
Shares 132,374 Value ($000) $4,980 Avg Close — Range —
Q3 2015
Shares 52,746 Value ($000) $1,007 Avg Close — Range —
Q2 2015
Shares 3,458 Value ($000) $92 Avg Close — Range —
Q1 2015
Shares 8,939 Value ($000) $150 Avg Close — Range —
Q4 2014
Shares 7,493 Value ($000) $105 Avg Close — Range —
Q1 2014
Shares 14,600 Value ($000) $131 Avg Close — Range —
Q4 2013
Shares 32,163 Value ($000) $242 Avg Close — Range —
Q3 2013
Shares 15,682 Value ($000) $108 Avg Close — Range —