Adar Poonawalla-led Serum Institute of India (SII) is selling its 35% stake in its joint venture with German specialty glass firm SCHOTT AG to American private equity firm TPG. Established in 1990, SCHOTT Poonawalla is a 50:50 venture between SCHOTT Pharma AG & Co. KGaA (Germany) and the Serum Institute of India. The company manufactures tubular glass pharmaceutical containers, including vials, syringes, ampoules, and cartridges.