SCHEDULE: CastleKnight Discloses 8.3% Stake in Nine Energy Service

CastleKnight Master Fund LP and affiliated entities have reported beneficial ownership of 1,157,943 shares, representing 8.3% of the outstanding common stock of Nine Energy Service, Inc.

Summary

• CastleKnight Master Fund LP, along with CastleKnight Fund GP LLC, CastleKnight Management LP, CastleKnight Management GP LLC, Weitman Capital LLC, and Aaron Weitman, have jointly filed a Schedule 13G.
• The filing indicates beneficial ownership of 1,157,943 shares of Nine Energy Service, Inc. common stock.
• This holding represents 8.3% of the class of securities.
• The filing date is April 9, 2026, with the event date being March 31, 2026.
• The reporting persons have shared power to vote and shared power to dispose of these shares.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral filing, as it is a standard disclosure of beneficial ownership and does not inherently signal positive or negative developments for the company.

Future Outlook

This filing is an informational disclosure regarding beneficial ownership and does not contain forward-looking statements or guidance from Nine Energy Service, Inc.

Industry Context

StockSavvy.ai notes that Schedule 13G filings are typically made by passive investors who acquire beneficial ownership of more than 5% of a company's voting stock. This filing indicates a significant passive stake by CastleKnight entities in Nine Energy Service, Inc.

Stakeholder Impact

• Shareholders: The filing informs shareholders about a significant passive ownership stake held by CastleKnight entities, which could be a factor in market perception and potential future corporate actions.

Key Dates

Keywords

Schedule 13G, Nine Energy Service, CastleKnight Master Fund LP, beneficial ownership, common stock, investment holding, SEC filing