ZENDESK INC

CUSIP: 98936J101 Class: COMMON STOCK

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

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

Q2 2022
Shares 13,364 Value ($000) $990 Avg Close — Range —
Q1 2022
Shares 24,686 Value ($000) $2,969 Avg Close — Range —
Q1 2021
Shares 13,602 Value ($000) $1,804 Avg Close — Range —
Q4 2020
Shares 23,090 Value ($000) $3,305 Avg Close — Range —
Q3 2020
Shares 60,297 Value ($000) $6,206 Avg Close — Range —
Q2 2020
Shares 43,793 Value ($000) $3,877 Avg Close — Range —
Q1 2020
Shares 58,561 Value ($000) $3,748 Avg Close — Range —
Q4 2019
Shares 74,496 Value ($000) $5,709 Avg Close — Range —
Q3 2019
Shares 28,851 Value ($000) $2,103 Avg Close — Range —
Q2 2019
Shares 2 Value ($000) $0 Avg Close — Range —
Q1 2019
Shares 845 Value ($000) $72 Avg Close — Range —
Q4 2018
Shares 3,118 Value ($000) $182 Avg Close — Range —
Q4 2017
Shares 15,162 Value ($000) $513 Avg Close — Range —
Q1 2017
Shares 3,308 Value ($000) $93 Avg Close — Range —
Q4 2016
Shares 1,296 Value ($000) $27 Avg Close — Range —