ZENDESK INC

CUSIP: 98936J101 Class: COMMON STOCK

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q2 2017
Shares 23,725 Value ($000) $659 Avg Close — Range —
Q1 2017
Shares 130,258 Value ($000) $3,652 Avg Close — Range —
Q4 2016
Shares 197,706 Value ($000) $4,191 Avg Close — Range —
Q3 2016
Shares 150,992 Value ($000) $4,637 Avg Close — Range —
Q2 2016
Shares 229,170 Value ($000) $6,046 Avg Close — Range —
Q1 2016
Shares 248,430 Value ($000) $5,200 Avg Close — Range —