PROS HOLDINGS INC

CUSIP: 74346Y103 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q1 2019
Shares 4,800 Value ($000) $203 Avg Close — Range —
Q4 2018
Shares 19 Value ($000) $1 Avg Close — Range —
Q4 2017
Shares 3,990 Value ($000) $106 Avg Close — Range —
Q1 2015
Shares 322 Value ($000) $8 Avg Close — Range —
Q4 2014
Shares 1,023 Value ($000) $28 Avg Close — Range —