NATIONAL OILWELL VARCO INC

CUSIP: 637071101 Class: COM

CHECK CAPITAL MANAGEMENT INC/CA's Holding History (CIK: 0001032814)

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

Q1 2015
Shares 4,260 Value ($000) $213 Avg Close — Range —
Q4 2014
Shares 4,260 Value ($000) $279 Avg Close — Range —
Q3 2014
Shares 4,260 Value ($000) $324 Avg Close — Range —
Q2 2014
Shares 4,260 Value ($000) $351 Avg Close — Range —
Q1 2014
Shares 4,260 Value ($000) $332 Avg Close — Range —
Q4 2013
Shares 4,260 Value ($000) $339 Avg Close — Range —
Q3 2013
Shares 4,280 Value ($000) $334 Avg Close — Range —
Q2 2013
Shares 4,330 Value ($000) $298 Avg Close — Range —