TENARIS SA (TS) — Institutional Holders, Q2 2026

287 institutional investment managers reported a TS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $2.1B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← TS stock profile

TS in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

100

Trimmed

Sold out

Biggest buyers

Merewether Investment ManagementNew · +1,130,692 sh+$62.7M
Holocene AdvisorsNew · +1,030,105 sh+$57.2M
MARSHALL WACE, LLPAdded · +696,368 sh+$38.6M
JANE STREET GROUPAdded · +615,896 sh+$34.2M
MILLENNIUM MANAGEMENTAdded · +550,803 sh+$30.6M

Biggest sellers

Westwood Global InvestmentsSold out · -6,673,718 sh-$370.3M
FMRTrimmed · -1,490,807 sh-$82.7M
VAN ECK ASSOCIATESTrimmed · -414,506 sh-$23.0M
Invesco Ltd.Trimmed · -266,955 sh-$14.8M
Grantham, Mayo, Van OtterlooTrimmed · -158,015 sh-$8.8M

TS 13F holders ranked 1–100 of 287

Institutional investors reporting a position in TENARIS SA on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	FMR#1 · 6,760,952 sh	6,760,952	$375.2M	0.02%	-18.1%
2	RENAISSANCE TECHNOLOGIES#2 · 3,056,044 sh	3,056,044	$169.6M	0.23%	-4.5%
3	VAN ECK ASSOCIATES#3 · 2,478,526 sh	2,478,526	$137.5M	0.08%	-14.3%
4	WELLINGTON MANAGEMENT GROUP LLP#4 · 2,458,033 sh	2,458,033	$136.4M	0.02%	+2.2%
5	PRICE T ROWE ASSOCIATES#5 · 1,502,839 sh	1,502,839	$83.4M	<0.01%	+4.0%
6	MORGAN STANLEY#6 · 1,238,988 sh	1,238,988	$68.8M	<0.01%	+5.2%
7	GOLDMAN SACHS GROUP#7 · 1,179,501 sh	1,179,501	$65.5M	<0.01%	+63.6%
8	Merewether Investment Management#8 · 1,130,692 sh	1,130,692	$62.7M	1.18%	New
9	DIMENSIONAL FUND ADVISORS#9 · 1,039,883 sh	1,039,883	$57.7M	0.01%	-7.2%
10	Holocene Advisors#10 · 1,030,105 sh	1,030,105	$57.2M	0.13%	New
11	DRIEHAUS CAPITAL MANAGEMENT#11 · 1,001,129 sh	1,001,129	$55.6M	0.32%	+12.7%
12	CWA Asset Management Group#12 · 987,291 sh	987,291	$54.8M	—	+94.9%
13	Invesco Ltd.#13 · 901,517 sh	901,517	$50.0M	<0.01%	-22.8%
14	BlackRock#14 · 747,509 sh	747,509	$41.5M	<0.01%	+4.4%
15	JANE STREET GROUP#15 · 716,734 sh	716,734	$39.8M	<0.01%	+610.8%
16	MARSHALL WACE, LLP#16 · 704,368 sh	704,368	$39.1M	0.03%	+8704.6%
17	MASSACHUSETTS FINANCIAL SERVICES#17 · 628,372 sh	628,372	$35.3M	0.01%	-2.9%
18	MILLENNIUM MANAGEMENT#18 · 619,526 sh	619,526	$34.4M	0.01%	+801.5%
19	UBS Group AG#19 · 581,680 sh	581,680	$32.3M	<0.01%	+16.6%
20	Bridgewater Associates#20 · 568,223 sh	568,223	$31.5M	0.13%	+1884.7%
21	ASSETMARK#21 · 560,853 sh	560,853	$31.1M	—	+14.3%
22	Aventail Capital Group#22 · 559,941 sh	559,941	$31.1M	1.78%	+540.9%
23	Freestone Grove Partners#23 · 504,463 sh	504,463	$28.0M	0.18%	New
24	SIR Capital Management, L.P.#24 · 368,588 sh	368,588	$20.5M	2.35%	New
25	BANK OF AMERICA#25 · 343,934 sh	343,934	$19.1M	<0.01%	+117.1%
26	Connor, Clark & Lunn Investment Management Ltd.#26 · 293,599 sh	293,599	$16.3M	0.03%	+64.5%
27	Carrhae Capital LLP#27 · 278,311 sh	278,311	$15.4M	—	-17.5%
28	HARDING LOEVNER#28 · 264,186 sh	264,186	$14.7M	0.14%	-9.8%
29	Pacer Advisors#29 · 508,587 sh	508,587	$14.1M	0.04%	-97.0%
30	CITADEL ADVISORS#30 · 232,876 sh	232,876	$12.9M	<0.01%	-20.4%
31	NORTHERN#31 · 211,326 sh	211,326	$11.7M	<0.01%	-3.0%
32	Capital Wealth Planning#32 · 208,408 sh	208,408	$11.6M	0.06%	-13.3%
33	Grantham, Mayo, Van Otterloo#33 · 189,569 sh	189,569	$10.5M	0.02%	-45.5%
34	AQR CAPITAL MANAGEMENT#34 · 183,476 sh	183,476	$10.2M	<0.01%	+26.2%
35	Kiltearn Partners LLP#35 · 173,766 sh	173,766	$9.6M	2.34%	-15.2%
36	LMR Partners LLP#36 · 172,323 sh	172,323	$9.6M	0.04%	New
37	Quantinno Capital Management#37 · 163,782 sh	163,782	$9.1M	0.01%	+11.9%
38	NATIONAL BANK OF CANADA#38 · 146,497 sh	146,497	$8.1M	<0.01%	+0.4%
39	STATE STREET#39 · 143,477 sh	143,477	$8.0M	<0.01%	-29.4%
40	Medina Value Partners#40 · 134,108 sh	134,108	$7.4M	1.46%	-47.1%
41	Legal & General Group Plc#41 · 129,637 sh	129,637	$7.2M	<0.01%	-11.5%
42	CAPITAL FUND MANAGEMENT S.A.#42 · 125,440 sh	125,440	$7.0M	0.03%	New
43	XTX Topco Ltd#43 · 124,656 sh	124,656	$6.9M	0.09%	+769.5%
44	HRT FINANCIAL#44 · 124,288 sh	124,288	$6.9M	0.02%	+212.5%
45	Y-Intercept (Hong Kong) Ltd#45 · 112,363 sh	112,363	$6.2M	—	New
46	Lighthouse Investment Partners#46 · 105,655 sh	105,655	$5.9M	0.16%	+148.6%
47	Point72 Asset Management, L.P.#47 · 103,502 sh	103,502	$5.7M	<0.01%	New
48	Ethic#48 · 98,988 sh	98,988	$5.5M	0.07%	-21.2%
49	ExodusPoint Capital Management#49 · 92,044 sh	92,044	$5.1M	0.03%	+710.0%
50	Creative Planning#50 · 88,942 sh	88,942	$4.9M	<0.01%	+22.1%
51	SILVERCREST ASSET MANAGEMENT GROUP#51 · 80,885 sh	80,885	$4.5M	0.03%	-19.7%
52	LEUTHOLD GROUP#52 · 80,367 sh	80,367	$4.5M	0.45%	-4.3%
53	Energy Income Partners#53 · 80,180 sh	80,180	$4.4M	0.07%	New
54	Integrated Quantitative Investments#54 · 75,734 sh	75,734	$4.2M	0.69%	+13.4%
55	AMERICAN CENTURY COMPANIES#55 · 64,923 sh	64,923	$3.6M	<0.01%	+125.9%
56	CHARLES SCHWAB INVESTMENT MANAGEMENT#56 · 64,854 sh	64,854	$3.6M	<0.01%	+13.1%
57	CITIGROUP#57 · 64,250 sh	64,250	$3.6M	<0.01%	+4.6%
58	GUGGENHEIM CAPITAL#58 · 61,742 sh	61,742	$3.4M	0.02%	+24.4%
59	FIRST ADVISORS#59 · 60,384 sh	60,384	$3.4M	<0.01%	+322.1%
60	LAZARD ASSET MANAGEMENT#60 · 58,680 sh	58,680	$3.3M	<0.01%	+0.7%
61	J. Goldman#61 · 49,500 sh	49,500	$2.7M	0.07%	New
62	Nuveen#62 · 47,009 sh	47,009	$2.6M	<0.01%	New
63	WELLS FARGO & COMPANY#63 · 46,860 sh	46,860	$2.6M	<0.01%	+5.6%
64	Campbell & Investment Adviser#64 · 46,579 sh	46,579	$2.6M	0.14%	+13.5%
65	CENTRAL VALLEY ADVISORS#65 · 46,572 sh	46,572	$2.6M	0.66%	New
66	BALYASNY ASSET MANAGEMENT L.P.#66 · 45,238 sh	45,238	$2.5M	<0.01%	New
67	HIGHLAND CAPITAL MANAGEMENT#67 · 43,970 sh	43,970	$2.4M	—	+0.1%
68	Vident Advisory#68 · 43,189 sh	43,189	$2.4M	0.02%	+0.3%
69	ACADIAN ASSET MANAGEMENT#69 · 41,481 sh	41,481	$2.3M	<0.01%	+1260.0%
70	Pathstone#70 · 40,340 sh	40,340	$2.2M	<0.01%	+0.1%
71	GTS SECURITIES#71 · 39,981 sh	39,981	$2.2M	0.05%	-36.2%
72	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#72 · 39,063 sh	39,063	$2.2M	<0.01%	+468.4%
73	Mariner#73 · 36,774 sh	36,774	$2.0M	<0.01%	-8.8%
74	MANNING & NAPIER ADVISORS#74 · 36,400 sh	36,400	$2.0M	0.03%	-30.7%
75	Walleye Capital#75 · 36,651 sh	36,651	$2.0M	<0.01%	New
76	BANK OF MONTREAL#76 · 36,498 sh	36,498	$2.0M	<0.01%	+20.3%
77	JPMORGAN CHASE#77 · 35,187 sh	35,187	$2.0M	<0.01%	+85.2%
78	O'SHAUGHNESSY ASSET MANAGEMENT#78 · 33,870 sh	33,870	$1.9M	<0.01%	-23.7%
79	NEW YORK STATE COMMON RETIREMENT FUND#79 · 33,399 sh	33,399	$1.9M	<0.01%	0.0%
80	Cerity Partners#80 · 32,463 sh	32,463	$1.8M	<0.01%	+2.7%
81	Fulcrum Asset Management LLP#81 · 32,076 sh	32,076	$1.8M	0.18%	New
82	MERCER GLOBAL ADVISORS#82 · 31,154 sh	31,154	$1.7M	<0.01%	-7.4%
83	Mork Capital Management#83 · 28,320 sh	28,320	$1.6M	1.01%	0.0%
84	VANGUARD CAPITAL MANAGEMENT#84 · 26,589 sh	26,589	$1.5M	0.00%	0.0%
85	Savant Capital#85 · 24,582 sh	24,582	$1.4M	<0.01%	+99.0%
86	VIKING FUND MANAGEMENT#86 · 25,000 sh	25,000	$1.4M	—	0.0%
87	Schonfeld Strategic Advisors#87 · 24,969 sh	24,969	$1.4M	<0.01%	New
88	Cadence Wealth Management#88 · 24,863 sh	24,863	$1.4M	0.62%	+4.9%
89	Callan Family Office#89 · 24,482 sh	24,482	$1.4M	0.03%	+2.1%
90	Hennion & Walsh Asset Management#90 · 24,383 sh	24,383	$1.4M	—	+1.4%
91	AMERIPRISE FINANCIAL#91 · 23,784 sh	23,784	$1.3M	<0.01%	+1.4%
92	Vanguard Personalized Indexing Management#92 · 23,594 sh	23,594	$1.3M	0.01%	+13.5%
93	EVERGREEN CAPITAL MANAGEMENT#93 · 23,043 sh	23,043	$1.3M	—	-3.8%
94	Laird Norton Wetherby Company#94 · 22,906 sh	22,906	$1.3M	0.02%	-1.7%
95	Toroso Investments#95 · 21,660 sh	21,660	$1.2M	<0.01%	+17.2%
96	Beck Bode#96 · 21,659 sh	21,659	$1.2M	0.18%	+2.4%
97	Russell Investments Group, Ltd.#97 · 21,128 sh	21,128	$1.2M	<0.01%	+58.1%
98	SEI INVESTMENTS#98 · 20,582 sh	20,582	$1.1M	<0.01%	-23.0%
99	US BANCORP \DE\#99 · 20,357 sh	20,357	$1.1M	<0.01%	+41.8%
100	CHESAPEAKE CAPITAL#100 · 20,168 sh	20,168	$1.1M	0.59%	+16.7%

Funds that sold out of TS in Q2 2026 (31)

Held TS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held TS in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Westwood Global Investments6,673,718 sh	6,673,718	$388.3M
FEARNLEY ASSET MANAGEMENT AS112,700 sh	112,700	$6.6M
FORA Capital22,994 sh	22,994	$1.3M
North of South Capital LLP18,087 sh	18,087	$1.1M
IMC-Chicago15,003 sh	15,003	$872.9K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP12,217 sh	12,217	$710.8K
YOUSIF CAPITAL MANAGEMENT9,548 sh	9,548	$555.5K
Gallo Partners9,483 sh	9,483	$551.7K
GSA CAPITAL PARTNERS LLP8,074 sh	8,074	$470.0K
TWO SIGMA INVESTMENTS7,594 sh	7,594	$441.8K
Merit Financial Group6,959 sh	6,959	$404.9K
R Squared Ltd6,246 sh	6,246	$363.4K
MGO ONE SEVEN5,036 sh	5,036	$293.0K
Split Creek DBA Split Creek Capital3,819 sh	3,819	$222.2K
PDS Planning3,593 sh	3,593	$209.0K
Larry Mathis Financial Planning3,573 sh	3,573	$207.9K
D'Orazio & Associates3,499 sh	3,499	$203.6K
Advisory Services Network1,685 sh	1,685	$98.0K
Advisors Asset Management1,533 sh	1,533	$89.2K
MAI Capital Management519 sh	519	$30.2K
PALLADIEM460 sh	460	$27.2K
Sound Income Strategies448 sh	448	$26.0K
Whipplewood Advisors256 sh	256	$14.9K
TWIN PEAKS WEALTH ADVISORS64 sh	64	$3.7K
TOTH FINANCIAL ADVISORY40 sh	40	$2.3K
BARCLAYS PLC32 sh	32	$1.9K
Western Wealth Management30 sh	30	$1.7K
Dogwood Wealth Management28 sh	28	$1.6K
Innovative Asset Advisors Group13 sh	13	$756.00
Ancora Advisors8 sh	8	$465.00
Root Financial Partners8 sh	8	$465.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.