Nine Energy Service NINE Institutional Ownership

Updated Oct 11, 2026

Nine Energy Service, Inc. (NYSE:NINE) was reported as a holding by 29 institutional investors in 13F filings for the quarter ended June 30, 2026.

• Collectively, these holders controlled 86.36% of Nine Energy Service's outstanding shares in Q2 2026, up from 83.50% in Q1 2026.
• Total shares held in Nine Energy Service rose 3.42% from Q1 2026, while the number of holders fell 42.00% from Q2 2025.
• Of the 29 holders of NINE in Q2 2026, 17 added to their positions, 6 reduced their stakes and 6 left their positions unchanged.
• Institutional investors held 12.05Mn shares of Nine Energy Service in total at the end of Q2 2026, up 398.91K from the prior quarter and up 1.3Mn from a year earlier.
• As of June 30, 2026, Mackay Shields LLC held the largest stake in Nine Energy Service with 3.01Mn shares, or 21.59% of shares outstanding.
• The largest position increases in NINE for Q2 2026 were by Cygnus Capital Advisors, LLC (+45.3K shares), Algebris (UK) LTD (+43.01K shares) and Morgan Stanley (+1.26K shares).
• On the other side, among holders that kept a position in Nine Energy Service, the largest reductions in Q2 2026 came from Philosophy Capital Management LLC (-173.34K shares), Jeffrey L. Gendell (-170.27K shares), CastleKnight Management LP (-126.39K shares), Adage Capital Partners GP, L.L.C. (-55.72K shares) and Mackay Shields LLC (-54.87K shares).
• Nine Energy Service's 10 largest institutional shareholders as of Q2 2026 were Mackay Shields LLC (3.01Mn shares), Philosophy Capital Management LLC (2.38Mn shares), Adage Capital Partners GP, L.L.C. (1.3Mn shares), CastleKnight Management LP (1.03Mn shares), Algebris (UK) LTD (832.91K shares), Jeffrey L. Gendell (614.23K shares), Vanguard Capital Management LLC (518.72K shares), Cygnus Capital Advisors, LLC (500.36K shares), Nomura Holdings Inc (482.29K shares) and Mackenzie Financial Corp (361.3K shares), per Business Quant data.