TS · Insider trading · 13F holders · Congress trades
Tenaris S.A. American depositary Shares (TS)
Who is buying and selling TS: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 18
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 2
TS at a glance
- No open-market insider purchases or sales of TS were filed in the last 90 days.
- 18 13F filers hold TS among their 50 largest positions, worth $209.0M combined. The biggest bets by portfolio weight are SIR Capital Management, L.P. (2.4%), Kiltearn Partners LLP (2.3%) and Aventail Capital Group, LP (1.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
- Members of Congress have disclosed 6 TS trades since 2014, 0 purchases and 2 sales in the past year; the latest was Greg Gianforte (R-MT), selling $15K–50K on Nov 13, 2020.
- TS last closed at $60.21 on Oct 30, 2026.
TS insider trading
No open-market insider purchases or sales of TS were filed in the last 90 days.
Who owns TS? Hedge funds and superinvestors
18 13F filers hold TS among their 50 largest positions, worth $209.0M combined. The biggest bets by portfolio weight are SIR Capital Management, L.P. (2.4%), Kiltearn Partners LLP (2.3%) and Aventail Capital Group, LP (1.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Merewether Investment Management, LPHedge fund | 1.2% | $62.7M | 1,130,692 | — | Q2 2026 |
| CWA Asset Management Group, LLCWealth manager | 1.4% | $45.8M | 829,599 | -16.0% shares | Q3 2026 |
| Aventail Capital Group, LPHedge fund | 1.8% | $31.1M | 559,941 | — | Q2 2026 |
| SIR Capital Management, L.P.Hedge fund | 2.4% | $20.5M | 368,588 | — | Q2 2026 |
| Carrhae Capital LLPHedge fund | 1.0% | $16.1M | 291,886 | +4.9% shares | Q3 2026 |
| Kiltearn Partners LLPHedge fund | 2.3% | $9.6M | 173,766 | -15.2% shares | Q2 2026 |
| Medina Value Partners, LLCHedge fund | 1.5% | $7.4M | 134,108 | -47.1% shares | Q2 2026 |
| Integrated Quantitative Investments LLCInstitutional asset manager | 0.7% | $4.2M | 75,734 | +13.4% shares | Q2 2026 |
| Central Valley Advisors, LLCWealth manager | 0.7% | $2.6M | 47,540 | +2.1% shares | Q3 2026 |
| Mork Capital Management, LLCHedge fund | 1.0% | $1.6M | 28,320 | +0.0% shares | Q2 2026 |
| Bosman Wealth Management, LLCWealth manager | 0.9% | $1.5M | 26,763 | +85.6% shares | Q3 2026 |
| Cadence Wealth Management LLCWealth manager | 0.6% | $1.4M | 24,863 | +4.9% shares | Q2 2026 |
| Viewpoint Investment Partners CorpHedge fund | 0.4% | $1.3M | 23,900 | — | Q3 2026 |
| Chesapeake Capital Corp /il/Asset manager | 0.6% | $1.1M | 20,168 | +16.7% shares | Q2 2026 |
| OneAscent Investment Solutions LLCMutual fund manager | 0.7% | $736K | 13,271 | — | Q2 2026 |
| Altrinsic Global Advisors LLCHedge fund | 0.0% | $589K | 10,618 | -19.9% shares | Q2 2026 |
| New Vernon Capital Holdings II LLCAsset manager | 0.2% | $421K | 7,581 | +0.0% shares | Q2 2026 |
| Transmarket Holdings LPHedge fund | 0.2% | $360K | 6,520 | New | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 6, Q2 2026: 12). Screen TS in the grand portfolio →
TS stock trades by members of Congress
Members of Congress have disclosed 6 TS trades since 2014, 0 purchases and 2 sales in the past year; the latest was Greg Gianforte (R-MT), selling $15K–50K on Nov 13, 2020.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Dec 2, 2020 | Greg GianforteR-MT · House | Sale | $15K–50K | Nov 13, 2020 | +339.2% |
| Apr 27, 2020 | Donna E. ShalalaD-FL · House | Sale | $1K–15K | Feb 15, 2019 | +124.6% |
| Mar 29, 2019 | Greg GianforteR-MT · House | Sale | $50K–100K | Mar 4, 2019 | +125.9% |
| Feb 25, 2019 | Josh GottheimerD-NJ · House | Sale | $1K–15K | Feb 15, 2019 | +124.6% |
| Jan 23, 2019 | Greg GianforteR-MT · House | Buy | $15K–50K | Dec 21, 2018 | +189.7% |
| Jun 18, 2014 | Lois FrankelD-FL · House | Sale | $1K–15K | Jun 12, 2014 | +31.5% |
4 members have traded TS: Greg Gianforte, Donna E. Shalala, Josh Gottheimer, Lois Frankel.
TS questions and answers
Are insiders buying TS stock?
No open-market insider purchases or sales of TS were filed in the last 90 days.
Which hedge funds own TS?
18 13F filers hold TS among their 50 largest positions, worth $209.0M combined. The biggest bets by portfolio weight are SIR Capital Management, L.P. (2.4%), Kiltearn Partners LLP (2.3%) and Aventail Capital Group, LP (1.8%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
Has Congress traded TS?
Members of Congress have disclosed 6 TS trades since 2014, 0 purchases and 2 sales in the past year; the latest was Greg Gianforte (R-MT), selling $15K–50K on Nov 13, 2020.
Who is the largest holder of TS?
Among 13F filers, Merewether Investment Management, LP reports the largest TS position, $62.7M (1,130,692 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is SIR Capital Management, L.P.'s: 2.4% of its portfolio.
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