BRIEF-Merck reports 6.5 pct passive stake in Spero Therapeutics as of Nov 6
November 15, 2017 at 16:52 PM EST
* Merck & Co reports 6.5 percent passive stake in Spero Therapeutics Inc as of Nov 6 - SEC Filing Source text: [http://bit.ly/2z57b4q] Further company coverage: