(Adds details on 2018 investments)
March 8 (Reuters) - Supermarket chain Kroger Co on Thursday reported quarterly net sales that beat analysts' estimates, but issued a disappointing full-year profit forecast that sent its shares down 7 percent in premarket trading.
The company said it expects full-year 2018 earnings of $1.95 per share to $2.15 per share, largely below the $2.15 analysts were expecting on average.
The company said it planned capital investments of about $3 billion in 2018, which excludes mergers, acquisitions and purchases of leased facilities.
Sales rose to $31.03 billion from $27.61 billion in the fourth quarter ended Feb. 3.
Analysts had expected sales of $30.83 billion, according to Thomson Reuters I/B/E/S.
Identical same-store sales in the fourth quarter rose 1.5 percent, slightly above the estimate of 1.45 percent.
Net earnings attributable to Kroger rose to $854 million, or 96 cents per share, from $506 million, or 53 cents per share, a year earlier. (Reporting by Nivedita Balu in Bengaluru; Editing by Sriraj Kalluvila)