NATIONAL OILWELL VARCO INC

CUSIP: 637071101 Class: COM

PROFESSIONAL ADVISORY SERVICES INC's Holding History (CIK: 0000894205)

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

Q4 2014
Shares 215,099 Value ($000) $14,095 Avg Close — Range —
Q3 2014
Shares 199,363 Value ($000) $15,172 Avg Close — Range —
Q2 2014
Shares 200,443 Value ($000) $16,506 Avg Close — Range —
Q1 2014
Shares 199,460 Value ($000) $15,532 Avg Close — Range —
Q4 2013
Shares 185,074 Value ($000) $14,719 Avg Close — Range —
Q3 2013
Shares 147,627 Value ($000) $11,531 Avg Close — Range —
Q2 2013
Shares 150,026 Value ($000) $10,337 Avg Close — Range —