X0306 4 2018-09-10 0 0001404655 HUBSPOT INC HUBS 0001494474 Gill Ronald S C/O HUBSPOT, INC. 25 FIRST STREET, 2ND FLOOR CAMBRIDGE MA 02141 1 0 0 0 Common Stock 2018-09-10 4 M 0 4140 5.76 A 18214 D Common Stock 2018-09-10 4 S 0 4140 152.33 D 14074 D Employee Stock Option (right to buy) 5.76 2018-09-10 4 M 0 4140 0.00 D 2022-06-18 Common Stock 4140 20693 D This transaction was effected pursuant to a written trading plan adopted by the Reporting Person in accordance with Rule 10b5-1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $151.75 to $152.55, inclusive. The reporting person undertakes to provide to HubSpot, Inc., any security holder of HubSpot, 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. This stock option is fully vested. /s/ John P. Kelleher, attorney-in-fact 2018-09-11