TENARIS SA-ADR (TS) Institutional Ownership Changes & 13F Activity

TENARIS SA-ADR (TS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC, Sequoia Financial Advisors, Ariel Appreciation Fund, Egerton Capital UK, and Viking Global Investors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2019Ariel Appreciation FundSell-126,048929,806$21,051
Q3 2019Renaissance Technologies LLCBuy3,615,1005,040,000$106,747
Q3 2019Egerton Capital UKSell-2,474,05811,738,362$248,619
Q3 2019Ariel Appreciation FundBuy29,6441,055,854$22,363
Q2 2019Egerton Capital UKBuy1,401,20614,212,420$373,929
Q2 2019Renaissance Technologies LLCBuy658,6001,424,900$37,489
Q2 2019Ariel Appreciation FundSell-31,1671,026,210$27,000
Q1 2019Egerton Capital UKBuy5,283,57412,811,214$361,917
Q1 2019Renaissance Technologies LLCSell-1,567,900766,300$21,648
Q1 2019Ariel Appreciation FundBuy67,5621,057,377$29,871
Q4 2018Egerton Capital UKSell-1,689,0557,527,640$160,489
Q4 2018Renaissance Technologies LLCBuy1,660,0002,334,200$49,765
Q4 2018Ariel Appreciation FundBuy100,281989,815$21,103
Q3 2018Egerton Capital UKBuy2,405,9549,216,695$308,944
Q3 2018Viking Global InvestorsSell-1,673,8052,192,701$73,499
Q3 2018Ariel Appreciation FundBuy10,784889,534$29,817
Q2 2018Egerton Capital UKBuy5,556,1666,810,741$247,843
Q2 2018Viking Global InvestorsBuy1,299,5433,866,506$140,702
Q2 2018Ariel Appreciation FundBuy56,918878,750$31,978
Q1 2018Viking Global InvestorsBuy2,566,9632,566,963$88,997
Q1 2018Ariel Appreciation FundBuy27,132821,832$28,493
Q4 2017Renaissance Technologies LLCBuy171,800674,200$21,480
Q4 2017Ariel Appreciation FundBuy164,870794,700$25,319
Q3 2017Ariel Appreciation FundBuy157,743629,830$17,830
Q3 2017Renaissance Technologies LLCSell-86,900502,400$14,223
Q2 2017Renaissance Technologies LLCSell-363,799589,300$18,351
Q2 2017Ariel Appreciation FundBuy129,513472,087$14,701
Q1 2017Renaissance Technologies LLCBuy828,599953,099$32,539
Q1 2017Ariel Appreciation FundBuy72,544342,574$11,695
Q4 2016Ariel Appreciation FundBuy18,991270,030$9,643

Frequently asked questions about TS activity

  • Which institutional owners are buying TS?

    Institutional owners buying TS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in TS activity?

    "Buy" means an investor increased their reported position in TS compared to the prior reporting period. This reflects growing exposure to TENARIS SA-ADR (TS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in TS increasing?

    Institutional interest in TS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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