MATTSON TECHNOLOGY INC

CUSIP: 577223100 Class: CMN

Potomac Capital Management, Inc.'s Holding History (CIK: 0001418746)

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

Q2 2014
Shares 891,116 Value ($000) $1,952 Avg Close — Range —
Q1 2014
Shares 1,432,998 Value ($000) $3,325 Avg Close — Range —
Q4 2013
Shares 506,059 Value ($000) $1,387 Avg Close — Range —