Oil States International, Inc (OIS) Institutional Ownership

Ownership Summary

Oil States International, Inc (NYSE:OIS) is held by 176 institutional investors per 13F filings through December 2025.

• These investors collectively held 88.7% of Oil States International's outstanding shares in December 2025, down from 94.0% in September 2025.
• Their total shares held in OIS decreased -4.68% from the prior quarter, while the number of investors in Oil States International increased 18.12% year over year.
• Of these 176 holders, 87 added to their stakes in Oil States International, 66 trimmed positions, and 23 made no changes.
• In total, institutional investors held 51.44Mn shares in Oil States International as of December 2025, down by 2.53Mn shares quarter on quarter, and up 335.04K shares year over year.
• As of December 31, 2025, BlackRock, Inc. held the largest stake in Oil States International with 6.31Mn shares, accounting for 10.88% of total shares outstanding.
• Leading buyers of Oil States International shares for the quarter ending December 2025 were VANGUARD CAPITAL MANAGEMENT LLC (2.42Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.64Mn), First Eagle Investment Management, LLC (1.51Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (1.33Mn), MARSHALL WACE, LLP (932.77K).
• The largest sales of OIS for the quarter ending December 2025 came from GENDELL JEFFREY L (1.27Mn), HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC (702.85K), D. E. Shaw & Co., Inc. (481.84K), KENNEDY CAPITAL MANAGEMENT LLC (374.14K), BlackRock, Inc. (348.18K).
• Oil States International's 10 largest shareholders as of December 2025 include BlackRock, Inc. (6.31Mn), First Eagle Investment Management, LLC (4.09Mn), DIMENSIONAL FUND ADVISORS LP (3.52Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.42Mn), ACADIAN ASSET MANAGEMENT LLC (2.35Mn), D. E. Shaw & Co., Inc. (2.17Mn), AMERICAN CENTURY COMPANIES INC (1.85Mn), AQR CAPITAL MANAGEMENT LLC (1.82Mn), State Street Corp (1.73Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.64Mn) per Business Quant data.