Shareholders’ annual K-1 tax forms for 2017 are now available here 1. SHAREHOLDER RELATIONS. The BlackstoneGroupL.P. 345 Park Avenue New York, NY 10154 As part of Blackstone’s ongoing effort to improve investor transparency, the firm is pleased to announce a significant acceleration in the availability of unit holders’ final 2013 tax information on Form K-1. The BlackstoneGroupL.P. (BX) see the separate Partner’s Instructions for Schedule K-1 and the instructions for your income tax return. 1. Partner DataLink Website The BlackstoneGroupL.P. IRS K-1Instructions. IRS Website. MLP Association. Deloitte Energy Portal. MLPData.com Quick Answer. The purpose of Schedule K-1 for firms such as The BlackstoneGroupL.P is to report a taxpayer's income from estates, credits or trusts as part of Form 1040, according to the Internal Revenue Service. Stock analysis for BlackstoneGroupLP/The (BX:New York) including stock price, stock chart, company news, key statistics, fundamentals and company profile. LaSalle Hotel Properties's stock jumps 5.1% premarket after Blackstone buyout BlackstoneGroupLP reported first-quarter profit that beat expectations thanks Investors. At Blackstone, For additional shareholder-related information about The BlackstoneGroupL.P.: US: +1 888-756-8443 International: +1 646-313-6590 The BlackstoneGroupLP is a global private equity firm founded in 1985 and headquartered in New York. The instructions have been sent to your email box. The BlackstoneGroupL.P. is an American multinational private equity, In late 2011, BlackstoneGroupLP acquired Jack Wolfskin, a German camping equipment company.