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 238 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	$326.74M 8,320,443 shares	14.89%	-441.46K(-5.00%)Reduced	SEC filing ↗ May 14, 2024	▾
02	Orbis Allan Gray Ltd CIK 1663865 · View history	$295.77M 7,531,797 shares	1.77%	-16.50K(-0.20%)Reduced	SEC filing ↗ May 15, 2024	▾
03	Perpetual Ltd CIK 1647273 · Amended · View history	$118.70M 3,022,738 shares	1.16%	-93.90K(-3.00%)Reduced	SEC filing ↗ Apr 16, 2024	▾
04	FMR LLC CIK 315066 · View history	$113.56M 2,891,799 shares	0.01%	-105.80K(-3.50%)Reduced	SEC filing ↗ May 13, 2024	▾
05	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$112.71M 2,870,114 shares	0.17%	-403.45K(-12.30%)Reduced	SEC filing ↗ Apr 30, 2024	▾
06	Sourcerock Group LLC CIK 1822531 · View history	$96.35M 2,453,576 shares	7.76%	+1.13M(+85.80%)Added	SEC filing ↗ May 15, 2024	▾
07	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$79.01M 2,011,910 shares	0.07%	-621.48K(-23.60%)Reduced	SEC filing ↗ May 15, 2024	▾
08	Harding Loevner LP CIK 928196 · View history	$70.80M 1,802,852 shares	0.44%	-459.77K(-20.30%)Reduced	SEC filing ↗ May 15, 2024	▾
09	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$70.01M 1,782,729 shares	0.01%	+56.94K(+3.30%)Added	SEC filing ↗ May 15, 2024	▾
10	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$69.61M 1,772,544 shares	0.11%	+941.20K(+113.20%)Added	SEC filing ↗ May 13, 2024	▾
11	MORGAN STANLEY CIK 895421 · Amended · View history	$59.99M 1,527,588 shares	0.00%	-96.57K(-5.90%)Reduced	SEC filing ↗ Oct 17, 2024	▾
12	Balyasny Asset Management L.P. CIK 1218710 · View history	$41.29M 1,051,370 shares	0.11%	-1.52M(-59.20%)Reduced	SEC filing ↗ May 13, 2024	▾
13	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$35.81M 911,917 shares	0.01%	-243.26K(-21.10%)Reduced	SEC filing ↗ May 15, 2024	▾
14	MARSHALL WACE, LLP CIK 1318757 · View history	$33.29M 847,789 shares	0.06%	+152.98K(+22.00%)Added	SEC filing ↗ May 15, 2024	▾
15	NATIXIS ADVISORS, LLC CIK 1018331 · View history	$29.44M 749,780 shares	0.07%	+107.73K(+16.80%)Added	SEC filing ↗ Apr 25, 2024	▾
16	Kiltearn Partners LLP CIK 1582633 · View history	$29.38M 743,959 shares	2.72%	+247.56K(+49.90%)Added	SEC filing ↗ May 15, 2024	▾
17	CITADEL ADVISORS LLC CIK 1423053 · View history	$28.99M 738,232 shares	0.03%	+320.05K(+76.50%)Added	SEC filing ↗ May 15, 2024	▾
18	TT International Asset Management LTD CIK 1809187 · View history	$27.20M 692,603 shares	2.52%	+141.53K(+25.70%)Added	SEC filing ↗ May 14, 2024	▾
19	BlackRock Inc. CIK 1364742 · View history	$25.80M 656,960 shares	0.00%	-482.73K(-42.40%)Reduced	SEC filing ↗ May 10, 2024	▾
20	Pacer Advisors, Inc. CIK 1616667 · View history	$24.10M 613,807 shares	0.06%	+87.81K(+16.70%)Added	SEC filing ↗ May 10, 2024	▾

Showing 20 / 238 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

238

Cancelled or null records excluded

Disclosed shares

55,948,226

Not deduplicated across managers

Disclosed value

$2.19B

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 · Q1 2024

Explore all 238 reporting institutions.

This page includes 20 of 238 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.