NATIONAL OILWELL VARCO INC

CUSIP: 637071101 Class: COM

ROBERTS GLORE & CO INC /IL/'s Holding History (CIK: 0001017115)

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

Q1 2015
Shares 7,217 Value ($000) $361 Avg Close — Range —
Q4 2014
Shares 9,540 Value ($000) $625 Avg Close — Range —
Q3 2014
Shares 8,990 Value ($000) $684 Avg Close — Range —
Q2 2014
Shares 8,990 Value ($000) $740 Avg Close — Range —
Q1 2014
Shares 8,990 Value ($000) $700 Avg Close — Range —
Q4 2013
Shares 5,440 Value ($000) $433 Avg Close — Range —
Q3 2013
Shares 5,440 Value ($000) $425 Avg Close — Range —