Appian CEO on principles for mining investment Michael Scherb, founder and CEO, Appian Capital Advisory. Since Appian Capital Advisory raised its flagship mining and metals fund in 2014, the London-based firm has made nine investments with six mines now in production and another two likely within the next two years. The firm has expanded to 37 investment professionals across locations in London, Toronto, Lima, Belo Horizonte and Sydney, now overseeing 4,650 employees across its portfolio. Sign Up for the Copper Digest Sign Up On Monday, Appian announced a significantly larger fund – $775 million and oversubscribed – which, despite the disruption caused by covid-19, has already deployed 40% of its capital.