MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328AA8 Class: NOTE 4.5% 7/1

ADVENT CAPITAL MANAGEMENT /DE/'s Holding History (CIK: 0001097278)

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

Q1 2014
Shares 4,534,000 Value ($000) $4,571 Avg Close — Range —
Q4 2013
Shares 10,863,000 Value ($000) $11,361 Avg Close — Range —
Q3 2013
Shares 12,748,000 Value ($000) $11,574 Avg Close — Range —