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TS in the 13F filings

Tenaris S A · CUSIP 88031M109

Sector · Materials
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
18
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 1 listed it in both
Shares listed
17,821,887
combined, among listed positions
Reported value
$1.0bn
combined, at the quarter end

Among the 91 comparable managers: 11 buyers (opened or added shares) and 10 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +4,918,633.

Managers listing TS in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

18 of 18 holders

ActionFiling
Fidelity (FMR LLC)8,251,759$480munder 0.1%Added+6,053,12615 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC3,199,744$186m0.29%Added+235,40014 May 2026 (the filing on sec.gov)
Wellington Management Group LLP2,405,034$140munder 0.1%Trimmed-277,10315 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,445,210$84munder 0.1%Trimmed-204,51415 May 2026 (the filing on sec.gov)
Invesco Ltd1,168,472$68munder 0.1%Added+622,26812 May 2026 (the filing on sec.gov)
MFS Investment Management646,854$38munder 0.1%Trimmed-9,58514 May 2026 (the filing on sec.gov)
Citadel Advisors LLC292,423$17munder 0.1%Trimmed-639,97315 May 2026 (the filing on sec.gov)
AQR Capital Management LLC145,427$8.5munder 0.1%Added+34,57015 May 2026 (the filing on sec.gov)
Jane Street Group LLC100,838$5.9munder 0.1%Newnew12 May 2026 (the filing on sec.gov)
Millennium Management LLC68,723$4.0munder 0.1%Trimmed-87,48315 May 2026 (the filing on sec.gov)
Bridgewater Associates LP28,630$1.7munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP22,712$1.3munder 0.1%Trimmed-6,87415 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP12,217$711kunder 0.1%Newnew14 May 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP11,363$661kunder 0.1%Newnew14 May 2026 (the filing on sec.gov)
Marshall Wace LLP8,000$465kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Two Sigma Investments LP7,594$442kunder 0.1%Held015 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC3,837$223kunder 0.1%Newnew27 Oct 2026 (the filing on sec.gov)
Acadian Asset Management LLC3,050$176kunder 0.1%Added+93913 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 7 in Q2 2026

Tracked managers listing it, at least.

0510152014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
TS by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20134$243mn.a.n.a.
Q3 20137$233mn.a.n.a.
Q4 20132$22mn.a.n.a.
Q1 20143$27mn.a.n.a.
Q2 20142$17mn.a.n.a.
Q3 20144$235mn.a.n.a.
Q4 20145$241mn.a.n.a.
Q1 20155$181mn.a.n.a.
Q2 20153$28mn.a.n.a.
Q3 20154$28mn.a.n.a.
Q4 20154$123mn.a.n.a.
Q1 20165$80mn.a.n.a.
Q2 20161$640kn.a.n.a.
Q4 20162$214mn.a.n.a.
Q1 20176$422mn.a.n.a.
Q2 20173$266mn.a.n.a.
Q3 20174$55mn.a.n.a.
Q4 20172$61mn.a.n.a.
Q1 20187$294mn.a.n.a.
Q2 20186$685mn.a.n.a.
Q3 20188$660mn.a.n.a.
Q4 20187$327mn.a.n.a.
Q1 20197$819mn.a.n.a.
Q2 20196$681mn.a.n.a.
Q3 20195$574mn.a.n.a.
Q4 20196$508mn.a.n.a.
Q1 20206$345mn.a.n.a.
Q2 20204$401mn.a.n.a.
Q3 20202$148mn.a.n.a.
Q4 20203$256mn.a.n.a.
Q1 20215$371mn.a.n.a.
Q2 20214$283mn.a.n.a.
Q3 20212$176mn.a.n.a.
Q4 20215$216mn.a.n.a.
Q1 20227$304mn.a.n.a.
Q2 20224$111mn.a.n.a.
Q3 20224$154mn.a.n.a.
Q4 20224$212mn.a.n.a.
Q1 20234$170mn.a.n.a.
Q2 20238$386mn.a.n.a.
Q3 202312$393mn.a.n.a.
Q4 20237$317m34
Q1 20246$193m43
Q2 20245$149m42
Q3 20245$227m41
Q4 20248$316m34
Q1 20255$373m51
Q2 20253$188m30
Q3 20252$123m21
Q4 20251$114m910
Q1 20262$326m1110
Q2 20267$467m178

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

TS and LIN →TS and GLW →TS and HWM →Choose a stock to compare with TS →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own TS, latest filings →Back to the 13F Explorer →