KEY POINTS
  • Greenlight bought up shares in Signet Jewelers, Under Armour and Best Buy while dissolving stakes in Monsanto, Rite Aid, Hewlett Packard and Kroger.
  • Einhorn's fund reported a 2.7 million stake in Twitter as of the end of December. CNBC previously reported the fund's stake in the social media company. Twitter shares are up 40 percent so far this year.
David Einhorn

David Einhorn's Greenlight Capital hedge fund reported new holdings in several big retailers as of the end of December.

The fund reported new stakes in nearly two dozen companies, including a 6.2 million share stake in department store operator J.C. Penney, 125,000 shares in Nordstrom and 132,000 shares in Kohls. Greenlight also disclosed a new 103,000 share stake in Signet Jewelers, 451,000 shares in Under Armour, and 103,000 shares in Best Buy.

In the same period, Greenlight dissolved stakes in Monsanto, Rite Aid, Hewlett Packard and Kroger.

The fund also disclosed a 2.7 million share stake in Twitter. CNBC previously reported in January that Greenlight Capital had bought a stake in the social media platform.