NEPHROGENEX INC

CUSIP: 640667101 Class: COM

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

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

Q4 2015
Shares 6,179 Value ($000) $10 Avg Close — Range —
Q2 2015
Shares 200 Value ($000) $1 Avg Close — Range —
Q1 2015
Shares 100 Value ($000) $1 Avg Close — Range —
Q3 2014
Shares 800 Value ($000) $4 Avg Close — Range —
Q2 2014
Shares 2,056 Value ($000) $13 Avg Close — Range —
Q1 2014
Shares 2,255 Value ($000) $18 Avg Close — Range —