Tenaris SA
TS · AIM
$58.23+$1.86 (+3.30%)TodayMarket closed ·
Prev close $56.37
Who owns TS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 70.9% of TS’s shares.
- Rocca & Partners, S.A.64.6%
- MFS Investment Management1.7%
- Vanguard Capital Management, LLC0.9%
- BlackRock Institutional Trust Company, N.A.0.7%
- Next 6 largest institutions3.0%
- All other shareholders29.1%
| Holder | Shares | % of shares |
|---|---|---|
| Rocca & Partners, S.A. | 692.09M | 64.56% |
| MFS Investment Management | 18.16M | 1.69% |
| Vanguard Capital Management, LLC | 9.93M | 0.93% |
| BlackRock Institutional Trust Company, N.A. | 7.76M | 0.72% |
| BlackRock Advisors (UK) Limited | 6.02M | 0.56% |
| Artemis Investment Management LLP | 5.97M | 0.56% |
| Invesco Advisers, Inc. | 5.77M | 0.54% |
| Caisse de Depot et Placement du Quebec | 5.29M | 0.49% |
| Aviva Investors Global Services Limited | 5.14M | 0.48% |
| Wellington Management Company, LLP | 3.64M | 0.34% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| MFS International Growth Fund | 7.78M | 0.73% |
| MFS International Intrinsic Value Portfolio | 6.05M | 0.56% |
| Caisse de depot et Placement du Quebec | 5.29M | 0.49% |
| Artemis Global Income Fund | 4.90M | 0.46% |
| Vanguard Total International Stock Index Fund | 4.71M | 0.44% |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.78M
- Days to cover
- 3.35
- % of shares outstanding
- 0.35%
- Average daily volume
- 1.13M
- Change since last report
- −1.9%
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