X0306 4 2016-12-12 1 0001113148 INFINITY PHARMACEUTICALS, INC. INFI 0001336503 KANGO SUJAY C/O INFINITY PHARMACEUTICALS, INC. 784 MEMORIAL DRIVE CAMBRIDGE MA 02139 0 1 0 0 Chief Commercial Officer Common Stock 2016-12-12 4 S 0 25009 1.304 D 50590 D Common Stock 2016-12-13 4 S 0 298 1.30 D 50292 D Common Stock 2016-12-13 4 S 0 42017 1.2673 D 8275 D Common Stock 2016-12-13 4 S 0 7676 1.2537 D 599 D Common Stock 3598.06 I 401(k) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $1.30 to $1.31, inclusive. The reporting person undertakes to provide to Infinity Pharmaceuticals, Inc., any security holder of Infinity 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 1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $1.26 to $1.285, inclusive. The reporting person undertakes to provide to Infinity Pharmaceuticals, Inc., any security holder of Infinity 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 2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $1.25 to $1.255, inclusive. The reporting person undertakes to provide to Infinity Pharmaceuticals, Inc., any security holder of Infinity 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 3. Ex. 24: Limited Power of Attorney /s/Seth A. Tasker as attorney-in-fact for Sujay Kango 2016-12-14