X0306 4 2021-05-10 0 0001532286 Nine Energy Service, Inc. NINE 0001727542 Crombie David 2001 KIRBY DRIVE, SUITE 200 HOUSTON TX 77019 0 1 0 0 See Remarks Common Stock 2021-05-10 4 S 0 44248 1.87 D 139298 D Common Stock 2021-05-12 4 S 0 10752 1.85 D 128546 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.87 to $1.89, inclusive. The reporting person undertakes to provide to Nine Energy Service, Inc., any security holder of Nine Energy Service, 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 range set forth in this footnote. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.73 to $1.90, inclusive. The reporting person undertakes to provide to Nine Energy Service, Inc., any security holder of Nine Energy Service, 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 range set forth in this footnote. Executive Vice President and Chief Operating Officer /s/ David Crombie by Theodore R. Moore, as Attorney-in-fact 2021-05-12