← Back to 13F holdingsStock detail · v1
NRG Energy, Inc
$NRGLast close: $21.21(2010-06-30)BRK current position: 6,000,000 shares ($0.13B as of 2010-06-30)Quarters with activity: 4CUSIP: 629377508
Delisted or non-tradable security. No daily market prices available for NRG. The chart below uses the IMPLIED price from each 13F filing (value ÷ shares), which gives one datapoint per quarter rather than a continuous price line. Buy/sell markers and the position-history table still reflect Berkshire's actual transactions.
Price history with Berkshire transactions
InitiatedAddedTrimmedExited
NRG (indexed, 1× = first visible date)Shares held (right axis)
Hover for daily price. Triangle markers show quarter-end Berkshire buy (▲ green) / sell (▼ orange/red) events from 13F-HR filings. Quarter-level granularity only — actual trade dates are not disclosed.
Berkshire's quarterly position history
| Quarter | Shares | Δ Shares | Action | Value (USD) | 13F |
|---|---|---|---|---|---|
| 2010-06-30 | 6,000,000 | — | held | $127.3M | View |
| 2010-03-31 | 6,000,000 | — | held | $125.4M | View |
| 2009-12-31 | 6,000,000 | — | held | $141.7M | View |
| 2009-09-30 | 6,000,000 | -1,200,000 | trimmed | $169.1M | View |
| 2009-06-30 | 7,200,000 | — | held | $186.9M | View |
| 2009-03-31 | 7,200,000 | — | held | $126.7M | View |
| 2008-12-31 | 7,200,000 | +2,200,000 | added | $168M | View |
| 2008-09-30 | 5,000,000 | +1,761,900 | added | $123.8M | View |
| 2008-06-30 | 3,238,100 | +3,238,100 | initiated | $138.9M | View |
Prices via Yahoo Finance. Berkshire position data from quarterly 13F-HR filings. 13F has a ~45-day filing lag and only covers long US-listed equity positions. Cost basis below is approximated from the quarter-end value at which shares were added (FIFO).