Orion OEC Institutional Ownership

Updated Oct 11, 2026

Orion S.A. (NYSE:OEC) appeared in the 13F filings of 185 institutional investors for the quarter ended June 30, 2026.

• Collectively, these holders controlled 94.01% of Orion's outstanding shares in Q2 2026, up from 91.64% in Q1 2026.
• Total shares held in Orion rose 2.83% from Q1 2026, while the number of holders fell 1.07% from Q2 2025.
• Looking at the 185 holders of OEC individually, 102 added to their positions, 50 reduced their stakes and 33 left their positions unchanged.
• In total, institutional investors held 53.13Mn shares of Orion at the end of Q2 2026, up 1.46Mn from the prior quarter and up 1.56Mn from a year earlier.
• Pzena Investment Management LLC held the largest position in OEC at 4.77Mn shares as of June 30, 2026, or 8.44% of shares outstanding.
• The largest position increases in OEC for Q2 2026 were by American Century Companies Inc (+695.31K shares), Acadian Asset Management LLC (+581.79K shares), AQR Capital Management LLC (+516.82K shares), Mackenzie Financial Corp (+382.74K shares) and Fuller & Thaler Asset Management, Inc. (+256.27K shares).
• On the other side, among holders that kept a position in Orion, the largest reductions in Q2 2026 came from Jane Street Group, LLC (-402.57K shares), D. E. Shaw & Co., Inc. (-282.49K shares), Marshall Wace, LLP (-237.4K shares), Charles Schwab Investment Management Inc (-213.41K shares) and Divisar Capital Management LLC (-182.51K shares).
• Business Quant data shows the 10 biggest positions in Orion as of Q2 2026 were held by Pzena Investment Management LLC (4.77Mn shares), BlackRock, Inc. (4.21Mn shares), Divisar Capital Management LLC (3.38Mn shares), American Century Companies Inc (3.2Mn shares), AQR Capital Management LLC (2.47Mn shares), D. E. Shaw & Co., Inc. (2.19Mn shares), Dimensional Fund Advisors LP (1.97Mn shares), Invesco Ltd. (1.66Mn shares), Fuller & Thaler Asset Management, Inc. (1.64Mn shares) and Geode Capital Management, LLC (1.45Mn shares).