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 203 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	$261.97M 8,240,633 shares	11.89%	-15.28K(-0.20%)Reduced	SEC filing ↗ Nov 12, 2024	▾
02	FMR LLC CIK 315066 · View history	$111.38M 3,503,644 shares	0.01%	+614.88K(+21.30%)Added	SEC filing ↗ Nov 13, 2024	▾
03	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$89.62M 2,819,144 shares	0.13%	+227.10K(+8.80%)Added	SEC filing ↗ Nov 13, 2024	▾
04	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$85.07M 2,686,231 shares	0.11%	-497.07K(-15.60%)Reduced	SEC filing ↗ Oct 29, 2024	▾
05	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$80.94M 2,546,184 shares	0.01%	+1.66M(+187.40%)Added	SEC filing ↗ Nov 14, 2024	▾
06	Sourcerock Group LLC CIK 1822531 · View history	$68.87M 2,166,500 shares	5.57%	-880.62K(-28.90%)Reduced	SEC filing ↗ Nov 14, 2024	▾
07	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$64.81M 2,038,707 shares	0.06%	+1.63M(+403.30%)Added	SEC filing ↗ Nov 14, 2024	▾
08	Balyasny Asset Management L.P. CIK 1218710 · View history	$64.74M 2,036,609 shares	0.17%	+2.04MNew	SEC filing ↗ Nov 14, 2024	▾
09	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$63.02M 1,982,429 shares	0.01%	+105.56K(+5.60%)Added	SEC filing ↗ Nov 14, 2024	▾
10	CITADEL ADVISORS LLC CIK 1423053 · View history	$57.09M 1,795,953 shares	0.06%	+123.21K(+7.40%)Added	SEC filing ↗ Nov 14, 2024	▾
11	Orbis Allan Gray Ltd CIK 1663865 · View history	$56.55M 1,779,017 shares	0.30%	-5.58M(-75.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
12	SIR Capital Management, L.P. CIK 1434997 · View history	$45.48M 1,430,551 shares	4.42%	+1.11M(+351.00%)Added	SEC filing ↗ Nov 14, 2024	▾
13	MORGAN STANLEY CIK 895421 · Amended · View history	$38.32M 1,205,344 shares	0.00%	-343.07K(-22.20%)Reduced	SEC filing ↗ May 14, 2025	▾
14	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$34.52M 1,085,933 shares	0.01%	+364.46K(+50.50%)Added	SEC filing ↗ Nov 14, 2024	▾
15	Point72 Asset Management, L.P. CIK 1603466 · View history	$33.40M 1,050,552 shares	0.12%	+531.86K(+102.50%)Added	SEC filing ↗ Nov 14, 2024	▾
16	Harding Loevner LP CIK 928196 · View history	$28.73M 903,867 shares	0.17%	-597.73K(-39.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
17	Holocene Advisors, LP CIK 1700574 · View history	$21.45M 674,857 shares	0.09%	+674.86KNew	SEC filing ↗ Nov 14, 2024	▾
18	Pacer Advisors, Inc. CIK 1616667 · View history	$21.13M 664,712 shares	0.05%	-13.71K(-2.00%)Reduced	SEC filing ↗ Nov 12, 2024	▾
19	BlackRock, Inc. CIK 2012383 · View history	$20.74M 652,546 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
20	Grantham, Mayo, Van Otterloo & Co. LLC CIK 1352662 · View history	$19.57M 615,730 shares	0.06%	+241.93K(+64.70%)Added	SEC filing ↗ Nov 13, 2024	▾

Showing 20 / 203 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

203

Cancelled or null records excluded

Disclosed shares

50,888,868

Not deduplicated across managers

Disclosed value

$1.60B

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 · Q3 2024

Explore all 203 reporting institutions.

This page includes 20 of 203 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.