Arrowhead Receives Additional 180 Day Grace Period to Comply with the NASDAQ $1.00 Minimum Bid Requirement

Arrowhead Research Corporation ARWR today announced that, on June 7, 2017, it received a notification from the NASDAQ Stock Market indicating that the Company will have an additional 180-day grace period, until December 5, 2011 to regain compliance with NASDAQ's $1.00 minimum bid requirement. The notification indicated that the Company did not regain compliance during the initial 180-day grace period provided under the rule. In accordance with NASDAQ Marketplace Rule 5810(c)(3)(A), the Company is eligible for the additional grace period because it meets the initial listing requirements for the NASDAQ Capital Market except for the bid price and provided written notice of its intention to cure the deficiency during the second compliance period by effecting a reverse stock split, if necessary. The NASDAQ letter does not impact Arrowhead's listing on The NASDAQ Capital Market at this time and Arrowhead's common stock will continue to trade under its current symbol "ARWR" during the additional 180-day compliance period. “This extension provides us with another six months to further our business, technical and organizational milestones, which we believe will lead to a higher market value of our stock,” said Chris Anzalone, Arrowhead's President and CEO. “While we have no immediate plans to implement a reverse stock split at this time, seeking approval of this measure serves as a prudent and precautionary step as we work to increase our valuation through organic growth.”