NATIONAL OILWELL VARCO INC

CUSIP: 637071101 Class: COM

BERKSHIRE HATHAWAY INC's Holding History (CIK: 0001067983)

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

Q1 2015
Shares 1,978,895 Value ($000) $98,925 Avg Close — Range —
Q4 2014
Shares 5,258,385 Value ($000) $344,582 Avg Close — Range —
Q3 2014
Shares 6,382,360 Value ($000) $485,698 Avg Close — Range —
Q2 2014
Shares 7,302,278 Value ($000) $601,342 Avg Close — Range —
Q1 2014
Shares 8,880,000 Value ($000) $691,486 Avg Close — Range —
Q4 2013
Shares 8,880,000 Value ($000) $706,226 Avg Close — Range —
Q3 2013
Shares 8,880,000 Value ($000) $693,617 Avg Close — Range —
Q2 2013
Shares 8,880,000 Value ($000) $611,832 Avg Close — Range —