Tenaris TS Institutional Ownership

Updated Oct 24, 2026

Tenaris Sa (NYSE:TS) counted 283 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

• Collectively, these holders controlled 3.64% of Tenaris' outstanding shares in Q2 2026, down from 3.73% in Q1 2026.
• Total holdings of TS shares fell 2.41% from Q1 2026, and the holder count rose 29.82% from Q2 2025.
• Of the 283 holders, 154 added to their positions, 78 reduced their stakes and 51 left their positions unchanged in Q2 2026.
• Combined, institutional investors held 38.39Mn shares of TS as of Q2 2026, down 947.76K from the prior quarter and down 4.66Mn from a year earlier.
• As of June 30, 2026, the biggest holder of Tenaris was FMR LLC with 6.76Mn shares, or 0.64% of shares outstanding.
• The biggest increases in TS positions during Q2 2026 came from Marshall Wace, LLP (+696.37K shares), Jane Street Group, LLC (+615.9K shares), Millennium Management LLC (+550.8K shares), Bridgewater Associates, LP (+539.59K shares) and CWA Asset Management Group, LLC (+480.74K shares).
• Holders that trimmed the most shares of Tenaris in Q2 2026 while keeping a position were FMR LLC (-1.49Mn shares), Van Eck Associates Corp (-414.51K shares), Invesco Ltd. (-266.95K shares), Grantham, Mayo, Van Otterloo & Co. LLC (-158.01K shares) and Renaissance Technologies LLC (-143.7K shares).
• Per Business Quant, the top 10 investors in TS for the quarter ended June 30, 2026 were FMR LLC (6.76Mn shares), Renaissance Technologies LLC (3.06Mn shares), Van Eck Associates Corp (2.48Mn shares), Wellington Management Group LLP (2.46Mn shares), T. Rowe Price Associates Inc (1.5Mn shares), Morgan Stanley (1.24Mn shares), Goldman Sachs Group Inc (1.18Mn shares), Merewether Investment Management, LP (1.13Mn shares), Dimensional Fund Advisors LP (1.04Mn shares) and Holocene Advisors, LP (1.03Mn shares).