VOCERA COMMUNICATIONS INC

CUSIP: 92857F107 Class: COMMON STOCK

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2017
Shares 100,594 Value ($000) $3,040 Avg Close — Range —
Q3 2017
Shares 97,190 Value ($000) $3,049 Avg Close — Range —
Q2 2017
Shares 117,724 Value ($000) $3,110 Avg Close — Range —
Q1 2017
Shares 92,185 Value ($000) $2,289 Avg Close — Range —
Q4 2016
Shares 98,326 Value ($000) $1,818 Avg Close — Range —
Q3 2016
Shares 91,455 Value ($000) $1,546 Avg Close — Range —
Q2 2016
Shares 137,921 Value ($000) $1,772 Avg Close — Range —
Q1 2016
Shares 93,623 Value ($000) $1,194 Avg Close — Range —
Q4 2015
Shares 75,393 Value ($000) $920 Avg Close — Range —
Q3 2015
Shares 79,444 Value ($000) $906 Avg Close — Range —
Q2 2015
Shares 75,843 Value ($000) $868 Avg Close — Range —