X0206 3 2017-04-27 0 0001692427 NCS Multistage Holdings, Inc. NCSM 0001034196 ADVENT INTERNATIONAL CORP/MA C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001556190 Advent Partners GPE VII Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001561808 Advent Partners GPE VII Cayman Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001559259 Advent Partners GPE VII-A Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001559260 Advent Partners GPE VII-A Cayman Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001563878 Advent Partners GPE VII-B Cayman Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001616626 Advent International GPE VII, LLC C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001616580 GPE VII GP Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 0001616558 GPE VII GP (Delaware) Limited Partnership C/O ADVENT INTERNATIONAL CORPORATION 75 STATE STREET, 29TH FLOOR BOSTON MA 02109 0 0 1 0 Common Stock 30943536 I See Notes Represents 30,943,536 shares held directly by Advent-NCS Acquisition Limited Partnership ("Advent-NCS LP"), of which 3,864,846 shares are indirectly owned by Advent International GPE VII Limited Partnership ("AI GPE VII"), 3,577,074 shares are indirectly owned by Advent International GPE VII-A Limited Partnership ("AI GPE VII-A"), 8,989,098 shares are indirectly owned by Advent International GPE VII-B Limited Partnership ("AI GPE VII-B"), 2,856,087 shares are indirectly owned by Advent International GPE VII-C Limited Partnership ("AI GPE VII-C"), (CONTINUED IN NEXT FOOTNOTE) (CONTINUTED FROM PREVIOUS FOOTNOTE) 2,314,575 shares are indirectly owned by Advent International GPE VII-D Limited Partnership ("AI GPE VII-D"), 6,476,481 shares are indirectly owned by Advent International GPE VII-E Limited Partnership ("AI GPE VII-E"), 835,476 shares are indirectly owned by Advent International GPE VII-F Limited Partnership ("AI GPE VII-F"), 835,476 shares are indirectly owned by Advent International GPE VII-G Limited Partnership ("AI GPE VII-G"), 504,381 shares are indirectly owned by Advent International GPE VII-H Limited Partnership ("AI GPE VII-H"), 12,378 shares are indirectly owned by Advent Partners GPE VII Limited Partnership ("AP GPE VII"), 30,945 shares are indirectly owned by Advent Partners GPE VII-A Limited Partnership ("AP GPE VII-A"), (CONTINUED IN NEXT FOOTNOTE) (CONTINUTED FROM PREVIOUS FOOTNOTE) 303,246 shares are indirectly owned by Advent Partners GPE VII-B Cayman Limited Partnership ("AP GPE VII-B Cayman"), 272,304 shares are indirectly owned by Advent Partners GPE VII Cayman Limited Partnership ("AP GPE VII Cayman") and 71,169 shares are indirectly owned by Advent Partners GPE VII-A Cayman Limited Partnership ("AP GPE VII-A Cayman"). Advent International Corporation ("AIC") is the manager of Advent International LLC ("AILLC") and of Advent International GPE VII, LLC ("AI GPE VII GP"). AI GPE VII GP is the general partner of each of AP GPE VII, AP GPE VII-A, AP GPE VII Cayman, AP GPE VII-A Cayman and AP GPE VII-B Cayman (collectively, the "AP Funds"). AI GPE VII GP also is the general partner of GPE VII GP Limited Partnership ("GPE VII GP"), which is the general partner of each of AI GPE VII-A, AI GPE VII-E and AI GPE VII-H (collectively, the "GPE VII GP Funds"). AI GPE VII GP also is the general partner of GPE VII GP (Delaware) Limited Partnership ("GPE VII GP DE"), which is the general partner of each of AI GPE VII, AI GPE VII-B, AI GPE VII-C, AI GPE VII-D, AI GPE VII-F and AI GPE VII-G (collectively, the "GPE VII GP DE Funds"). Advent-NCS GP LLC ("Advent-NCS GP") is the general partner of Advent-NCS LP. The AP Funds, GPE VII GP Funds and GPE VII GP DE Funds collectively own 100% of the limited partnership interests in Advent-NCS LP. Each of AIC, AILLC, AI GPE VII GP, GPE VII GP, GPE VII GP DE, Advent-NCS GP, Advent-NCS LP, each of the AP Funds, each of the GPE VII GP Funds and each of the GPE VII GP DE Funds are referred to herein as the "Reporting Persons". Each Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of its respective pecuniary interest therein, if any, and the inclusion of these shares in their report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or any other purpose. This Form 3 is the second of three Forms 3 being filed relating to the same event. The Form 3 has been split into three filings because there are more than 10 Reporting Persons in total, and the SEC's EDGAR filing system limits a single Form 3 to a maximum of 10 Reporting Persons. Each Form 3 will be filed by Designated Filer Advent International Corporation. /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27 /s/ Richard Terranova, Attorney-in-Fact 2017-04-27