X0202 SCHEDULE 13G 0001954661 XXXXXXXX LIVE Common Stock, par value $0.01 per share 03/31/2026 0001532286 NINE ENERGY SERVICE, INC. 65441V200 2001 Kirby Drive Suite 200 Houston TX 77019 Rule 13d-1(c) CastleKnight Master Fund LP b E9 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 PN CastleKnight Fund GP LLC b DE 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 OO CastleKnight Management LP b DE 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 IA PN CastleKnight Management GP LLC b DE 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 OO Weitman Capital LLC b NJ 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 OO Aaron Weitman b X1 0.00 1157943.00 0.00 1157943.00 1157943.00 N 8.3 HC IN NINE ENERGY SERVICE, INC. 2001 Kirby Drive, Suite 200, Houston, Texas 77019 CastleKnight Master Fund LP CastleKnight Fund GP LLC CastleKnight Management LP CastleKnight Management GP LLC Weitman Capital LLC Aaron Weitman CastleKnight Master Fund LP Maples Corporate Services Limited P.O. Box 309 Ugland House Grand Cayman KY1-1104 Cayman Islands CastleKnight Fund GP LLC 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America CastleKnight Management GP LLC 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America Weitman Capital LLC c/o Aaron Weitman c/o CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America Aaron Weitman c/o CastleKnight Management LP 888 Seventh Avenue, 24th Floor New York, New York 10019 United States of America CastleKnight Master Fund LP - Cayman Islands CastleKnight Fund GP LLC - Delaware CastleKnight Management LP - Delaware CastleKnight Management GP LLC - Delaware Weitman Capital LLC - New Jersey Aaron Weitman - United States Y CastleKnight Master Fund LP - 1,157,943 CastleKnight Fund GP LLC - 1,157,943 CastleKnight Management LP - 1,157,943 CastleKnight Management GP LLC - 1,157,943 Weitman Capital LLC - 1,157,943 Aaron Weitman - 1,157,943 CastleKnight Master Fund LP - 8.3% CastleKnight Fund GP LLC - 8.3% CastleKnight Management LP - 8.3% CastleKnight Management GP LLC - 8.3% Weitman Capital LLC - 8.3% Aaron Weitman - 8.3% CastleKnight Master Fund LP - 0 CastleKnight Fund GP LLC - 0 CastleKnight Management LP - 0 CastleKnight Management GP LLC - 0 Weitman Capital LLC - 0 Aaron Weitman - 0 CastleKnight Master Fund LP - 1,157,943 CastleKnight Fund GP LLC - 1,157,943 CastleKnight Management LP - 1,157,943 CastleKnight Management GP LLC - 1,157,943 Weitman Capital LLC - 1,157,943 Aaron Weitman - 1,157,943 CastleKnight Master Fund LP - 0 CastleKnight Fund GP LLC - 0 CastleKnight Management LP - 0 CastleKnight Management GP LLC - 0 Weitman Capital LLC - 0 Aaron Weitman - 0 CastleKnight Master Fund LP - 1,157,943 CastleKnight Fund GP LLC - 1,157,943 CastleKnight Management LP - 1,157,943 CastleKnight Management GP LLC - 1,157,943 Weitman Capital LLC - 1,157,943 Aaron Weitman - 1,157,943 Y Y N Please see Exhibit B attached hereto. Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit A - Joint Filing Agreement Exhibit B - Control Person Identification CastleKnight Master Fund LP By: CastleKnight Fund GP LLC, its general partner, By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman 04/09/2026 CastleKnight Fund GP LLC By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman 04/09/2026 CastleKnight Management LP By: CastleKnight Management GP LLC, its general partner, By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman 04/09/2026 CastleKnight Management GP LLC By: Weitman Capital LLC, its managing member, By: /s/ Aaron Weitman 04/09/2026 Weitman Capital LLC /s/ Aaron Weitman 04/09/2026 Aaron Weitman /s/ Aaron Weitman 04/09/2026 * Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his, her or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.