** Shares of Hess Midstream HESM.N down 2.1% at $39.98 in extended trading on news of secondary offering

** Houston-based subsidiary of Hess Corp HES.N commences 10 mln share offering by affiliate of Global Infrastructure Partners (GIP)

** Offering to cut BlackRock-owned GIP's stake from 14.3% to 9.6%, or ~20.8 mln shares, per the SEC filing

** Goldman Sachs sole bookrunner

** HESM shares on Mon finished up 0.9% at $40.85. Stock up 10% YTD and up about 27% over the past 12 months

(Lance Tupper is a Reuters market analyst. The views expressed are his own)

((lance.tupper@tr.com 1-646-279-6380))