COMBIMATRIX CORPORATION

CUSIP: 20009T501 Class: COM PAR

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

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

Q3 2017
Shares 66,070 Value ($000) $496 Avg Close — Range —
Q2 2017
Shares 25,878 Value ($000) $138 Avg Close — Range —
Q1 2017
Shares 13,314 Value ($000) $73 Avg Close — Range —