X0508 4 2026-02-28 0001692427 NCS Multistage Holdings, Inc. NCSM 0001228756 MORRISON MICHAEL L C/O NCS MULTISTAGE HOLDINGS, INC. 19350 STATE HIGHWAY 249, SUITE 600 HOUSTON TX 77070 1 CFO & Treasurer 0 Common Stock 2026-02-28 4 M 0 4972 0 A 12451 D Common Stock 2026-02-28 4 F 0 4972 39.84 D 7479 D Common Stock 2026-02-28 4 D 0 262 39.84 D 7217 D Common Stock 2026-03-02 4 A 0 7996 0 A 15213 D Common Stock 2026-03-02 4 D 0 2019 40.93 D 13194 D Common Stock 2026-03-03 4 A 0 2463 0 A 15657 D Equivalent Stock Units 2026-02-28 4 M 0 4972 0 D Common Stock 4972 6043 D Equivalent Stock Units 2026-03-03 4 A 0 2463 0 A Common Stock 2463 8506 D Performance Stock Units 2026-03-03 4 A 0 4978 0 A 2028-12-31 Common Stock 4978 4978 D Equivalent stock units vested on February 28, 2026 and settled for cash. These shares were surrendered to satisfy the tax obligations related to the vesting of restricted stock units. These shares were surrendered to satisfy the tax obligations related to the vesting of performance stock units. Includes 2,145 restricted stock units which vest in two equal annual installments beginning on February 28, 2027 and 2,463 restricted stock units which vest in three equal annual installments beginning on February 28, 2027. These equivalent stock units settle in cash and represent the economic equivalent of one share of common stock, provided that the amount of cash settled for any equivalent stock unit will not exceed the maximum payout established by the Compensation, Nominating and Governance Committee. The number of derivative securities reported in column 9 represents 3,898 equivalent stock units which vest on February 28, 2027 and 2,145 equivalent stock units which vest in two equal annual installments beginning on February 28, 2027. The number of derivative securities reported in column 9 represents 3,898 equivalent stock units which vest on February 28, 2027, 2,145 equivalent stock units which vest in two equal annual installments beginning on February 28, 2027 and 2,463 equivalent stock units which vest in three equal annual installments beginning on February 28, 2027. These performance stock units represent a contingent right to receive common stock, based on the Issuer's relative total shareholder return versus that of its peer group, subject to an absolute total shareholder return modifier. Each performance stock unit will settle for between zero and 1.25 shares of common stock in the first quarter of 2029, based on achievement of the performance measures over a three-year period, following certification by the Compensation, Nominating and Governance Committee of the performance results. /s/ Ori Lev, attorney-in-fact 2026-03-03