Deepa Seetharaman / Wall Street Journal:

Facebook’s board says it was “entirely appropriate” for Sheryl Sandberg to investigate if George Soros shorted Facebook after he made negative comments  —  A letter from the board said Sandberg was being truthful about her knowledge of a public-relations firm’s work into the investor

Facebook's board says it was "entirely appropriate" for Sheryl Sandberg to investigate if George Soros shorted Facebook after he made negative comments (Deepa Seetharaman/Wall Street Journal)
Source: Tech Meme