Nine Energy CFO Guy Sirkes resigns; Heather Schmidt named Interim CFO

Nine Energy Service, Inc.

Guy Sirkes resigns as EVP & CFO effective May 11, 2026 to accept another position.
Heather Schmidt appointed Interim CFO effective May 11, 2026; she joined Nine in 2012.
Schmidt currently SVP of Strategic Development & IR; previously VP of Strategic Development, IR & Marketing.
Schmidt holds an MBA from Rice University; no family ties to directors or exec officers.
No transactions between Schmidt and the company requiring disclosure under Item 404(a).

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