Company · Ownership research

TENARIS SA TS

CIK 0001190723 · CUSIP 88031M109

Insider tradingInitial holdingsInstitutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 88031M109 (TS), not CUSIP 88031M909 (TS), CUSIP 88031M959 (TS), CUSIP L90272136 (TNRSF), and does not merge CUSIPs.

This page lists the top 20 of 226 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Westwood Global Investments, LLC CIK 1356513 · View history	$251.97M 8,255,913 shares	12.56%	-64.53K(-0.80%)Reduced	SEC filing ↗ Aug 9, 2024	▾
02	Orbis Allan Gray Ltd CIK 1663865 · View history	$224.63M 7,360,076 shares	1.40%	-171.72K(-2.30%)Reduced	SEC filing ↗ Aug 14, 2024	▾
03	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$97.15M 3,183,299 shares	0.14%	+313.19K(+10.90%)Added	SEC filing ↗ Jul 31, 2024	▾
04	Sourcerock Group LLC CIK 1822531 · View history	$93.00M 3,047,116 shares	6.59%	+593.54K(+24.20%)Added	SEC filing ↗ Aug 14, 2024	▾
05	FMR LLC CIK 315066 · View history	$88.16M 2,888,760 shares	0.01%	-3.04K(-0.10%)Reduced	SEC filing ↗ Aug 13, 2024	▾
06	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$79.11M 2,592,044 shares	0.13%	+819.50K(+46.20%)Added	SEC filing ↗ Aug 9, 2024	▾
07	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$57.28M 1,876,865 shares	0.01%	+94.14K(+5.30%)Added	SEC filing ↗ Aug 14, 2024	▾
08	CITADEL ADVISORS LLC CIK 1423053 · View history	$51.05M 1,672,746 shares	0.05%	+934.51K(+126.60%)Added	SEC filing ↗ Aug 14, 2024	▾
09	MORGAN STANLEY CIK 895421 · Amended · View history	$47.26M 1,548,419 shares	0.00%	+20.83K(+1.40%)Added	SEC filing ↗ May 14, 2025	▾
10	Harding Loevner LP CIK 928196 · View history	$45.83M 1,501,595 shares	0.25%	-301.26K(-16.70%)Reduced	SEC filing ↗ Aug 14, 2024	▾
11	MOORE CAPITAL MANAGEMENT, LP CIK 1448574 · View history	$29.13M 954,335 shares	0.64%	+729.34K(+324.10%)Added	SEC filing ↗ Aug 14, 2024	▾
12	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$27.04M 885,884 shares	0.00%	+397.81K(+81.50%)Added	SEC filing ↗ Aug 14, 2024	▾
13	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$22.02M 721,475 shares	0.00%	-190.44K(-20.90%)Reduced	SEC filing ↗ Aug 13, 2024	▾
14	MARSHALL WACE, LLP CIK 1318757 · View history	$21.80M 714,161 shares	0.03%	-133.63K(-15.80%)Reduced	SEC filing ↗ Aug 14, 2024	▾
15	JANE STREET GROUP, LLC CIK 1595888 · View history	$21.30M 697,756 shares	0.02%	+611.28K(+706.90%)Added	SEC filing ↗ Aug 15, 2024	▾
16	NATIXIS ADVISORS, LLC CIK 1018331 · View history	$21.24M 696,062 shares	0.05%	-53.72K(-7.20%)Reduced	SEC filing ↗ Aug 1, 2024	▾
17	Pacer Advisors, Inc. CIK 1616667 · View history	$20.71M 678,417 shares	0.05%	+64.61K(+10.50%)Added	SEC filing ↗ Aug 13, 2024	▾
18	BlackRock Inc. CIK 1364742 · View history	$20.08M 658,086 shares	0.00%	+1.13K(+0.20%)Added	SEC filing ↗ Aug 13, 2024	▾
19	CAPITAL FUND MANAGEMENT S.A. CIK 1323645 · View history	$19.89M 651,827 shares	0.23%	+108.66K(+20.00%)Added	SEC filing ↗ Aug 13, 2024	▾
20	Perpetual Ltd CIK 1647273 · View history	$19.85M 650,553 shares	0.22%	-2.37M(-78.50%)Reduced	SEC filing ↗ Jul 30, 2024	▾

Showing 20 / 226 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

226

Cancelled or null records excluded

Disclosed shares

55,737,198

Not deduplicated across managers

Disclosed value

$1.70B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

TENARIS SA · Q2 2024

Explore all 226 reporting institutions.

This page includes 20 of 226 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.