Social venture capital investor Acumen has marked a full exit from Orb Energy Private Limited which it had backed nine years ago. The impact investor has exited Orb Energy via a secondary share sale to two other existing investors, Dutch development bank FMO and Shell Ventures BV, the venture arm of global energy firm Shell. The exit comes after Shell in October 2019 announced that it had picked up a stake of almost 20 per cent in Orb Energy, which manufactures solar energy equipment such as photovoltaic panels and water heaters. Acumen had invested around $1.1 million in Orb Energy between May and June 2011. As per a statement by Acumen, its fund – Acumen Fund – had marked a profitable exit from its investment in Orb Energy.