NATIONAL OILWELL VARCO INC

CUSIP: 637071101 Class: COM

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

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

Q3 2014
Shares 24,508 Value ($000) $1,865 Avg Close — Range —
Q2 2014
Shares 25,481 Value ($000) $2,098 Avg Close — Range —