X0306 4 2019-06-26 0 0000879407 ARROWHEAD PHARMACEUTICALS, INC. ARWR 0001506045 Ferrari Mauro 225. S LAKE AVE SUITE 1050 PASADENA CA 91101 1 0 0 0 Common Stock 2019-06-26 4 S 0 17756 27.61 D 1900 D The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.58 to $27.79, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4. /s/ Mauro Ferrari 2019-06-28