MICREL INC

CUSIP: 594793101 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q2 2015
Shares 649,953 Value ($000) $9,034 Avg Close — Range —
Q1 2015
Shares 678,616 Value ($000) $10,233 Avg Close — Range —
Q4 2014
Shares 775,736 Value ($000) $11,257 Avg Close — Range —
Q3 2014
Shares 773,488 Value ($000) $9,305 Avg Close — Range —
Q2 2014
Shares 275,047 Value ($000) $3,103 Avg Close — Range —
Q1 2014
Shares 296,481 Value ($000) $3,285 Avg Close — Range —
Q4 2013
Shares 266,230 Value ($000) $2,628 Avg Close — Range —
Q3 2013
Shares 253,141 Value ($000) $2,306 Avg Close — Range —
Q2 2013
Shares 276,232 Value ($000) $2,729 Avg Close — Range —