Exhibit 99.1 NCS Multistage Holdings, Inc. 19350 State Highway 249, Suite 600 Houston, Texas 77070 PRESS RELEASE NCS MULTISTAGE HOLDINGS, INC. ANNOUNCES FIRST QUARTER 2024 RESULTS First Quarter Results ● Total revenues of $43.9 million, a 1% year-over-year increase and a 24% increase compared to the fourth quarter of 2023 ● Net income of $2.1 million and earnings per diluted share of $0.82, compared to net loss of $(15.0) million and loss per share of $(6.10) in the same quarter of 2023 ● Adjusted net incom ...