Saudi Aramco’s delayed initial public offering is sidelining grand North American expansion plans at its U.S. refining subsidiary Motiva Enterprises LLC, people familiar with the matter said, at a time when its rivals grew their market share. After dissolving a partnership with Royal Dutch Shell PLC two years ago, Motiva set out to rebuild and boost market share in the Americas. It evaluated deals for LyondellBasell Industries NV’s Houston refinery, with the Caribbean government of Curacao, and considered expanding its sole U.S. oil refinery. But none of those came to pass as the company feared it might pay too much for acquisitions or become too exposed to disruptions by expanding its sole U.S. refinery, the people said. […]