BRIEF-Blackstone Holdings I LP Reports 8.5 Pct Stake In CVR Partners LP As On Dec 18 By: Reuters: Company News December 20, 2017 at 18:37 PM EST * BLACKSTONE HOLDINGS I L.P. REPORTS 8.5 PERCENT STAKE IN CVR PARTNERS LP AS ON DEC 18 - SEC FILING Read More >> Related Stocks: Cvr Partners LP