MATTSON TECHNOLOGY INC

CUSIP: 577223100 Class: CMN

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q3 2014
Shares 381,960 Value ($000) $943 Avg Close — Range —
Q2 2014
Shares 406,584 Value ($000) $890 Avg Close — Range —
Q1 2014
Shares 370,394 Value ($000) $859 Avg Close — Range —
Q4 2013
Shares 332,590 Value ($000) $911 Avg Close — Range —