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Pursuant a purchase contract between Arrowhead and Calando, Arrowhead purchased approximately 60 million shares of favored share in Calando for $1 million in money and the cancellation of $8 million with debt owed to Arrowhead by Calando.. Arrowhead increases ownership in Calando’s outstanding equity to 79 percent Arrowhead Research Corporation today announced that it has invested $1 million in its majority owned subsidiary, Calando Pharmaceuticals, and converted approximately $8M of Calando debt to Arrowhead into equity. Arrowhead now owns approximately 79 percent of Calando’s outstanding equity.