MERRIMACK PHARMACEUTICALS IN

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

CSS LLC/IL's Holding History (CIK: 0001103646)

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

Q2 2015
Shares 750,000 Value ($000) $1,577 Avg Close — Range —
Q1 2015
Shares 3,888,000 Value ($000) $7,733 Avg Close — Range —
Q4 2014
Shares 2,888,000 Value ($000) $5,473 Avg Close — Range —
Q3 2014
Shares 3,888,000 Value ($000) $6,036 Avg Close — Range —
Q2 2014
Shares 3,015,000 Value ($000) $4,060 Avg Close — Range —
Q1 2014
Shares 3,590,000 Value ($000) $3,630 Avg Close — Range —
Q4 2013
Shares 2,690,000 Value ($000) $2,828 Avg Close — Range —