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Tenaris S.A. (TS) institutional ownership

Market cap$28.8B SectorEnergy
Funds holding · Q1 2026
248
reported TS position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
153 buyers · 95 sellers

Tenaris S.A. (TS) price and institutional activity

Dates

Q1 2026

$0 bought by 153 investors
FMR LLCDriehaus Capital Management LLC +151 more
$0 sold by 95 investors
Citadel Advisors LLCWestwood Global Investments, LLC +93 more
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Bought Sold Totals per quarter; hover a bar for the names.

Tenaris S.A. (TS) institutional activity · 248

Investor Type Est. change Change Δ Own Date
FMR LLC · Added
Change +6.1M Δ Own +275.3% Date Q1 2026
FMR LLC Added· Q1 2026 +6.1M +275.3% Q1 2026
Driehaus Capital Management LLC · New
Change +888K Date Q1 2026
Driehaus Capital Management LLC New· Q1 2026 +888K Q1 2026
Van Eck Associates Corp · Added
Change +874K Date Q1 2026
Van Eck Associates Corp Added· Q1 2026 +874K Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −640K −68.6% Q1 2026
Invesco Ltd. · Added
Change +622K Δ Own +113.9% Date Q1 2026
Invesco Ltd. Added· Q1 2026 +622K +113.9% Q1 2026
Westwood Global Investments, LLC · Reduced
Change −599K Date Q1 2026
Westwood Global Investments, LLC Reduced· Q1 2026 −599K Q1 2026
Cwa Asset Management Group, LLC · New
Change +507K Date Q1 2026
Cwa Asset Management Group, LLC New· Q1 2026 +507K Q1 2026
D. E. Shaw & Co., Inc. · Exited
Change −472K Δ Own −100.0% Date Q1 2026
D. E. Shaw & Co., Inc. Exited· Q1 2026 −472K −100.0% Q1 2026
Jump Financial, LLC · Exited
Change −346K Δ Own −100.0% Date Q1 2026
Jump Financial, LLC Exited· Q1 2026 −346K −100.0% Q1 2026
Carrhae Capital LLP · New
Change +337K Date Q1 2026
Carrhae Capital LLP New· Q1 2026 +337K Q1 2026
Medina Value Partners, LLC · Reduced
Change −308K Date Q1 2026
Medina Value Partners, LLC Reduced· Q1 2026 −308K Q1 2026
Wellington Management Group LLP · Reduced
Change −277K Δ Own −10.3% Date Q1 2026
Wellington Management Group LLP Reduced· Q1 2026 −277K −10.3% Q1 2026
UBS Group AG · Added
Change +276K Date Q1 2026
UBS Group AG Added· Q1 2026 +276K Q1 2026
Point72 Asset Management, L.P. · Exited
Change −266K Δ Own −100.0% Date Q1 2026
Point72 Asset Management, L.P. Exited· Q1 2026 −266K −100.0% Q1 2026
Capital Wealth Planning, LLC · New
Change +241K Date Q1 2026
Capital Wealth Planning, LLC New· Q1 2026 +241K Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 248

Famous investor activity in Tenaris S.A. (TS)

Tenaris S.A. (TS) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
San Faustin S.A.
% of shares outstanding 69.7% Filing date Feb 10, 2026
San Faustin S.A. 69.7% Feb 10, 2026
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Tenaris S.A. (TS) ownership FAQ

Who owns TS?

248 reporting institutions disclosed TS position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.