COMBIMATRIX CORPORATION

CUSIP: 20009T501 Class: COM PAR

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q1 2017
Shares 1,900 Value ($000) $10 Avg Close — Range —
Q1 2016
Shares 744 Value ($000) $3 Avg Close — Range —