MATTSON TECHNOLOGY INC

CUSIP: 577223100 Class: CMN

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

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

Q1 2016
Shares 14,049 Value ($000) $51 Avg Close — Range —
Q4 2015
Shares 14,432 Value ($000) $51 Avg Close — Range —
Q3 2015
Shares 14,999 Value ($000) $35 Avg Close — Range —
Q2 2015
Shares 20,419 Value ($000) $68 Avg Close — Range —