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Equibles

TS

Tenaris SA

Company with tickers: TS, TNRSF

CIK
1190723
CUSIP
88031M109
Shares Outstanding
504,819,878
13F Activity (30d)
169 filings 165 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 266
Total Value: $2,322,653,926
Total Shares: 39,921,865
Showing 1–100 of 277 holdings by value · page 1 of 3

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 266 13F filers · Δ vs Dec 31, 2025
Top Holder
20.7%
Jun 2023 → Mar 2026 · range 14.1% – 25.7%
−1.3 pts
Top 5
58.7%
Jun 2023 → Mar 2026 · range 36.6% – 58.7%
+6.9 pts
Top 10
73.2%
Jun 2023 → Mar 2026 · range 56.2% – 73.2%
+3.7 pts
HHI
924
Jun 2023 → Mar 2026 · range 475 – 924
Broadly held+120

Quarterly Activity

vs Dec 31, 2025
New
70
Increased
90
Decreased
64
Sold Out
36
Unchanged
42
Holder count: +34
Institutional value: +82.4%
Shares held: +20.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega FMR LLC +6,053,126 8,251,759
Mega VAN ECK ASSOCIATES CORP +873,847 2,893,032
Mega Invesco Ltd. +622,268 1,168,472
Mega UBS Group AG +276,246 498,978
Large RENAISSANCE TECHNOLOGIES LLC +235,400 3,199,744

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega CITADEL ADVISORS LLC −644,173 362,723
Mid Westwood Global Investments, LLC −598,686 6,673,718
Small Medina Value Partners, LLC −308,133 253,362
Mega WELLINGTON MANAGEMENT GROUP LLP −277,103 2,405,034
Mega PRICE T ROWE ASSOCIATES INC /MD/ −204,514 1,445,210

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Large Driehaus Capital Management LLC 888,346 $51,683,970
Mid CWA Asset Management Group, LLC 554,150 $32,240,447
Mid Carrhae Capital LLP 337,428 $19,631,561
Large Capital Wealth Planning, LLC 240,514 $13,993,104
Large Connor, Clark & Lunn Investment Management Ltd. 178,439 $10,381,581

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega D. E. Shaw & Co., Inc. 471,555 $18,131,289
Mid Jump Financial, LLC 346,283 $13,314,581
Large Point72 Asset Management, L.P. 266,087 $10,231,045
Large Balyasny Asset Management L.P. 228,960 $8,803,512
Small Corigliano Investment Advisers, LLC 157,700 $6,063,565
Filter: New 70 Increased 90 Reduced 64 Sold out 36 Unchanged 42
Showing 100 of 277
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega FMR LLC $480,087,337 20.67% 8,251,759
Mid Westwood Global Investments, LLC $388,276,912 16.72% 6,673,718
Large RENAISSANCE TECHNOLOGIES LLC $186,161,105 8.02% 3,199,744
Mega VAN ECK ASSOCIATES CORP $168,316,601 7.25% 2,893,032
Mega WELLINGTON MANAGEMENT GROUP LLP $139,924,877 6.02% 2,405,034
Mega PRICE T ROWE ASSOCIATES INC /MD/ $84,082,317 3.62% 1,445,210
Mega MORGAN STANLEY $68,540,051 2.95% 1,178,069
Mega Invesco Ltd. $67,981,697 2.93% 1,168,472
Mega DIMENSIONAL FUND ADVISORS LP $65,220,186 2.81% 1,121,007
Large Driehaus Capital Management LLC $51,683,970 2.23% 888,346
Mega GOLDMAN SACHS GROUP INC $41,941,612 1.81% 720,894
Mega BlackRock, Inc. $41,644,719 1.79% 715,791
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $37,633,964 1.62% 646,854
Mid CWA Asset Management Group, LLC $29,471,079 1.27% 506,550
Mega UBS Group AG $29,030,539 1.25% 498,978
Large ASSETMARK, INC $28,553,405 1.23% 490,777
Large Grantham, Mayo, Van Otterloo & Co. LLC $20,222,437 0.87% 347,584
Mid Carrhae Capital LLP $19,631,561 0.85% 337,428
Mid Harding Loevner LP $17,038,478 0.73% 292,858
Mega CITADEL ADVISORS LLC $17,013,169 0.73% 292,423
Small Medina Value Partners, LLC $14,740,601 0.63% 253,362
Large Capital Wealth Planning, LLC $13,993,104 0.60% 240,514
Mega NORTHERN TRUST CORP Bank $12,677,304 0.55% 217,898
Small Kiltearn Partners LLP $11,918,696 0.51% 204,859
Mega STATE STREET CORP $11,820,896 0.51% 203,178
Large PEAK6 LLC $10,588,760 0.46% 182,000
Large Connor, Clark & Lunn Investment Management Ltd. $10,381,581 0.45% 178,439
Mega BANK OF AMERICA CORP /DE/ Bank $9,217,862 0.40% 158,437
Mega Legal & General Group Plc $8,524,242 0.37% 146,515
Large Quantinno Capital Management LP $8,514,468 0.37% 146,347
Large NATIONAL BANK OF CANADA /FI/ Bank $8,485,843 0.37% 145,855
Mega AQR CAPITAL MANAGEMENT LLC $8,460,941 0.36% 145,427
Mid Ethic Inc. $7,305,778 0.31% 125,572
Small FEARNLEY ASSET MANAGEMENT AS $6,556,886 0.28% 112,700
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $6,475,434 0.28% 111,300
Mega JANE STREET GROUP, LLC $5,866,754 0.25% 100,838
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $5,860,936 0.25% 100,738
Mid Aventail Capital Group, LP $5,083,012 0.22% 87,367
Small LEUTHOLD GROUP, LLC $4,886,770 0.21% 83,994
Large Creative Planning $4,236,667 0.18% 72,820
Mega MILLENNIUM MANAGEMENT LLC $3,998,304 0.17% 68,723
Small Integrated Quantitative Investments LLC $3,886,307 0.17% 66,798
Mid GTS SECURITIES LLC Broker-Dealer $3,647,071 0.16% 62,686
Mega CITIGROUP INC $3,574,927 0.15% 61,446
Mega CITADEL ADVISORS LLC $3,473,346 0.15% 59,700
Large LAZARD ASSET MANAGEMENT LLC $3,389,100 0.15% 58,252
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $3,336,157 0.14% 57,342
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $3,071,904 0.13% 52,800
Mid MANNING & NAPIER ADVISORS LLC $3,053,926 0.13% 52,491
Mega MILLENNIUM MANAGEMENT LLC $2,909,000 0.13% 50,000
Large GUGGENHEIM CAPITAL LLC $2,888,403 0.12% 49,646
Mid Crossmark Global Holdings, Inc. $2,820,857 0.12% 48,485
Mid CWA Asset Management Group, LLC $2,769,368 0.12% 47,600
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $2,584,181 0.11% 44,417
Mega WELLS FARGO & COMPANY/MN $2,582,434 0.11% 44,387
Mid HIGHLAND CAPITAL MANAGEMENT, LLC $2,555,265 0.11% 43,920
Large Vident Advisory, LLC $2,504,123 0.11% 43,041
Mid Lighthouse Investment Partners, LLC $2,472,650 0.11% 42,500
Mid Campbell & CO Investment Adviser LLC $2,387,881 0.10% 41,043
Large Mariner, LLC $2,345,061 0.10% 40,307
Large Pathstone Holdings, LLC $2,343,896 0.10% 40,287
Large HRT FINANCIAL LP $2,314,051 0.10% 39,774
Large MERCER GLOBAL ADVISORS INC /ADV $1,957,000 0.08% 33,637
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $1,943,153 0.08% 33,399
Mid Brooklyn Investment Group $1,901,089 0.08% 32,676
Mega JANE STREET GROUP, LLC $1,896,668 0.08% 32,600
Small Caitong International Asset Management Co., Ltd $1,874,152 0.08% 32,213
Large Cerity Partners LLC $1,839,824 0.08% 31,623
Mega BANK OF MONTREAL /CAN/ Bank $1,764,947 0.08% 30,336
Mega AMERICAN CENTURY COMPANIES INC $1,671,744 0.07% 28,734
Large Bridgewater Associates, LP $1,665,693 0.07% 28,630
Mega ENVESTNET ASSET MANAGEMENT INC $1,650,159 0.07% 28,363
Small Mork Capital Management, LLC $1,647,657 0.07% 28,320
Large SEI INVESTMENTS CO $1,555,034 0.07% 26,728
Small CSS LLC/IL $1,550,497 0.07% 26,650
Mega VANGUARD CAPITAL MANAGEMENT LLC $1,546,948 0.07% 26,589
Large TD Waterhouse Canada Inc. $1,537,231 0.07% 26,422
Mega LPL Financial LLC $1,480,215 0.06% 25,442
Small VIKING FUND MANAGEMENT LLC $1,454,500 0.06% 25,000
Mid Hennion & Walsh Asset Management, Inc. $1,398,763 0.06% 24,042
Mid Callan Family Office, LLC Family Office $1,394,574 0.06% 23,970
Mid EVERGREEN CAPITAL MANAGEMENT LLC $1,393,294 0.06% 23,948
Micro Cadence Wealth Management LLC $1,379,447 0.06% 23,710
Mega AMERIPRISE FINANCIAL INC $1,364,087 0.06% 23,446
Mid Laird Norton Wetherby Trust Company, LLC Bank $1,355,302 0.06% 23,295
Mid FORA Capital, LLC $1,337,790 0.06% 22,994
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,321,384 0.06% 22,712
Large Walleye Trading LLC $1,290,548 0.06% 22,182
Mid Twin Tree Management, LP $1,239,234 0.05% 21,300
Small Beck Bode, LLC $1,230,739 0.05% 21,154
Mid Vanguard Personalized Indexing Management, LLC $1,209,154 0.05% 20,783
Large GABELLI FUNDS LLC $1,163,600 0.05% 20,000
Mega JANE STREET GROUP, LLC $1,157,782 0.05% 19,900
Mega JPMORGAN CHASE & CO $1,105,242 0.05% 18,997
Mid HANTZ FINANCIAL SERVICES, INC. $1,080,460 0.05% 18,571
Large Tidal Investments LLC $1,074,991 0.05% 18,477
Mid SIGNATUREFD, LLC $1,072,024 0.05% 18,426
Mid North of South Capital LLP $1,052,301 0.05% 18,087
Mid Sanctuary Advisors, LLC $1,025,771 0.04% 17,631
Small Illumine Investment Management, LLC $1,024,142 0.04% 17,603

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