MERRIMACK PHARMACEUTICALS IN

CUSIP: 590328100 Class: CMN

GUGGENHEIM CAPITAL LLC's Holding History (CIK: 0001283072)

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

Q1 2017
Shares 363,154 Value ($000) $1,118 Avg Close — Range —
Q4 2016
Shares 285,799 Value ($000) $1,166 Avg Close — Range —
Q2 2016
Shares 421,079 Value ($000) $2,270 Avg Close — Range —
Q1 2016
Shares 419,708 Value ($000) $3,513 Avg Close — Range —
Q4 2015
Shares 427,476 Value ($000) $3,377 Avg Close — Range —
Q3 2015
Shares 476,339 Value ($000) $4,053 Avg Close — Range —
Q2 2015
Shares 497,711 Value ($000) $6,155 Avg Close — Range —
Q1 2015
Shares 418,169 Value ($000) $4,968 Avg Close — Range —
Q4 2014
Shares 339,372 Value ($000) $3,835 Avg Close — Range —