TENARIS SA-ADR (TS) Institutional Shareholders
TENARIS SA-ADR (TS) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $2.05B in TS holdings during the latest filing period.
Fmr Llc is currently the largest disclosed institutional shareholder of TS tracked by InsiderSet, reporting ownership valued at approximately $480.09M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $473.07M, representing an estimated loss of -1.46% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 75% of the total disclosed TS value among the investors covered in this analysis. Major shareholders include Fmr Llc, Westwood Global Investments, Llc, Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in TENARIS SA-ADR (TS).
This page ranks the largest institutional TS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
258
Total Reported Value
$2.05B
Largest Holder
Fmr Llc
Largest Position
$480.09M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
104
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.03% | 8,251,759 | $480,087,317 | $473,073,343 | -$7,013,974 | -1.46% | |
| Westwood Global Investments, Llc | 14.47% | 6,673,718 | $388,276,914 | $382,604,253 | -$5,672,661 | -1.46% | |
| Renaissance Technologies LLC | Jim Simons | 0.29% | 3,199,744 | $186,161,106 | $183,441,324 | -$2,719,782 | -1.46% |
| Wellington Management Group Llp | 0.03% | 2,405,034 | $139,924,878 | $137,880,599 | -$2,044,279 | -1.46% | |
| Morgan Stanley | 0.00% | 1,178,069 | $68,540,118 | $67,538,696 | -$1,001,422 | -1.46% | |
| Invesco Ltd. | 0.01% | 1,168,472 | $67,981,701 | $66,988,500 | -$993,201 | -1.46% | |
| Dimensional Fund Advisors Lp | 0.01% | 1,121,007 | $65,218,551 | $64,267,331 | -$951,220 | -1.46% | |
| Cwa Asset Management Group, Llc | 1.68% | 987,291 | $54,784,766 | $56,601,393 | +$1,816,627 | +3.32% | |
| Driehaus Capital Management Llc | 0.38% | 888,346 | $51,683,970 | $50,928,876 | -$755,094 | -1.46% | |
| Goldman Sachs Group Inc | 0.01% | 720,894 | $41,941,619 | $41,328,853 | -$612,766 | -1.46% | |
| Blackrock, Inc. | 0.00% | 715,791 | $41,644,696 | $41,036,298 | -$608,398 | -1.46% | |
| Massachusetts Financial Services Co | 0.01% | 646,854 | $38,079,913 | $37,084,140 | -$995,773 | -2.61% | |
| Ubs Group Ag | 0.01% | 498,978 | $29,030,540 | $28,606,409 | -$424,131 | -1.46% | |
| Assetmark, Inc | 0.06% | 490,777 | $28,553,390 | $28,136,245 | -$417,145 | -1.46% | |
| Grantham, Mayo, Van Otterloo & Co. Llc | 0.05% | 347,584 | $20,222,437 | $19,926,991 | -$295,446 | -1.46% | |
| Harding Loevner Lp | 0.18% | 292,858 | $17,038,478 | $16,789,549 | -$248,929 | -1.46% | |
| Citadel Advisors Llc | 0.01% | 292,423 | $17,013,170 | $16,764,611 | -$248,559 | -1.46% | |
| Carrhae Capital Llp | 1.02% | 278,311 | $15,443,477 | $15,955,570 | +$512,093 | +3.32% | |
| Medina Value Partners, Llc | 3.09% | 253,362 | $14,740,601 | $14,525,243 | -$215,358 | -1.46% | |
| Capital Wealth Planning, Llc | 0.08% | 240,514 | $13,993,105 | $13,788,668 | -$204,437 | -1.46% | |
| Northern Trust Corp | 0.00% | 217,898 | $12,677,306 | $12,492,092 | -$185,214 | -1.46% | |
| Kiltearn Partners Llp | 3.21% | 204,859 | $11,918,697 | $11,744,566 | -$174,131 | -1.46% | |
| State Street Corp | 0.00% | 203,178 | $11,820,896 | $11,648,195 | -$172,701 | -1.46% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | 178,439 | $10,381,581 | $10,229,908 | -$151,673 | -1.46% | |
| Bank Of America Corp | 0.00% | 158,437 | $9,217,841 | $9,083,193 | -$134,648 | -1.46% | |
| Legal & General Group Plc | 0.00% | 146,515 | $8,523,509 | $8,399,705 | -$123,804 | -1.45% | |
| Quantinno Capital Management Lp | 0.01% | 146,347 | $8,514,482 | $8,390,074 | -$124,408 | -1.46% | |
| National Bank Of Canada | 0.01% | 145,855 | $8,484,385 | $8,361,867 | -$122,518 | -1.44% | |
| Aqr Capital Management Llc | 0.00% | 145,427 | $8,460,922 | $8,337,330 | -$123,592 | -1.46% | |
| Fearnley Asset Management As | 2.14% | 112,700 | $6,556,886 | $6,461,091 | -$95,795 | -1.46% | |
| Y-Intercept (Hong Kong) Ltd | 0.12% | 112,363 | $6,235,023 | $6,441,771 | +$206,748 | +3.32% | |
| Jane Street Group, Llc | 0.01% | 100,838 | $5,866,755 | $5,781,043 | -$85,712 | -1.46% | |
| Silvercrest Asset Management Group Llc | 0.04% | 100,738 | $5,860,937 | $5,775,310 | -$85,627 | -1.46% | |
| Ethic Inc. | 0.07% | 98,988 | $5,492,838 | $5,674,982 | +$182,144 | +3.32% | |
| Aventail Capital Group, Lp | 0.25% | 87,367 | $5,083,012 | $5,008,750 | -$74,262 | -1.46% | |
| Leuthold Group, Llc | 0.52% | 83,994 | $4,886,771 | $4,815,376 | -$71,395 | -1.46% | |
| Creative Planning | 0.00% | 72,820 | $4,236,653 | $4,174,771 | -$61,882 | -1.46% | |
| Millennium Management Llc | 0.00% | 68,723 | $3,998,304 | $3,939,890 | -$58,414 | -1.46% | |
| Integrated Quantitative Investments Llc | 0.70% | 66,798 | $3,886,308 | $3,829,529 | -$56,779 | -1.46% | |
| Gts Securities Llc | 0.13% | 62,686 | $3,647,071 | $3,593,788 | -$53,283 | -1.46% | |
| Citigroup Inc | 0.00% | 61,446 | $3,574,929 | $3,522,699 | -$52,230 | -1.46% | |
| Lazard Asset Management Llc | 0.01% | 58,252 | $3,389,078 | $3,339,587 | -$49,491 | -1.46% | |
| Charles Schwab Investment Management Inc | 0.00% | 57,342 | $3,336,157 | $3,287,417 | -$48,740 | -1.46% | |
| Manning & Napier Advisors Llc | 0.04% | 52,491 | $3,053,926 | $3,009,309 | -$44,617 | -1.46% | |
| Guggenheim Capital Llc | 0.02% | 49,646 | $2,888,404 | $2,846,205 | -$42,199 | -1.46% | |
| Central Valley Advisors, Llc | 0.66% | 46,572 | $2,584,252 | $2,669,973 | +$85,721 | +3.32% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 44,417 | $2,584,181 | $2,546,427 | -$37,754 | -1.46% | |
| Wells Fargo & Company/Mn | 0.00% | 44,387 | $2,582,429 | $2,544,707 | -$37,722 | -1.46% | |
| Vident Advisory, Llc | 0.02% | 43,041 | $2,504,169 | $2,467,541 | -$36,628 | -1.46% | |
| Lighthouse Investment Partners, Llc | 0.09% | 42,500 | $2,472,650 | $2,436,525 | -$36,125 | -1.46% |
Frequently asked questions about TS
Who owns the most TS stock?
The largest holders of TS are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for TENARIS SA-ADR (TS).
Is TS widely held by superinvestors?
Many widely followed stocks like TS appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly TS is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.