Who owns TS?
Institutional ownership of Tenaris S.A. from Form 13F, Q2 2026
282 institutional managers reported holding Tenaris S.A. (TS) in Form 13F filings for Q2 2026, with 38,394,166 shares worth $2.1B. The largest reported holder was FMR LLC. Managers that filed both quarters cut a net 896,794 shares (-2.3%). 51 opened new positions and 31 sold out.
- Funds holding
- 282
- Value held
- $2.1B
- New / sold out
- 51 / 31
- Net shares, same filers
- -2.3%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of TS
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| FMR LLC | $375M | 17.6% | 6,760,952 | Trimmed |
| Renaissance Technologies LLC | $170M | 8.0% | 3,056,044 | Trimmed |
| Van Eck Associates Corp | $138M | 6.5% | 2,478,526 | Trimmed |
| Wellington Management Group LLP | $136M | 6.4% | 2,458,033 | Added |
| Price T Rowe Associates Inc | $83.4M | 3.9% | 1,502,839 | Added |
| Morgan Stanley | $68.8M | 3.2% | 1,238,988 | Added |
| Goldman Sachs Group Inc | $65.5M | 3.1% | 1,179,501 | Added |
| Merewether Investment Management, LP | $62.7M | 2.9% | 1,130,692 | New |
| Dimensional Fund Advisors LP | $57.7M | 2.7% | 1,039,883 | Trimmed |
| Holocene Advisors, LP | $57.2M | 2.7% | 1,030,105 | New |
| Driehaus Capital Management LLC | $55.6M | 2.6% | 1,001,129 | Added |
| CWA Asset Management Group, LLC | $54.8M | 2.6% | 987,291 | Added |
| Invesco Ltd. | $50.0M | 2.3% | 901,517 | Trimmed |
| BlackRock, Inc. | $41.5M | 1.9% | 747,509 | Added |
| Jane Street Group, LLC | $39.8M | 1.9% | 716,734 | Added |
| Marshall Wace, LLP | $39.1M | 1.8% | 704,368 | Added |
| Massachusetts Financial Services Co | $35.3M | 1.6% | 628,372 | Trimmed |
| Millennium Management LLC | $34.4M | 1.6% | 619,526 | Added |
| UBS Group AG | $32.3M | 1.5% | 581,680 | Added |
| Bridgewater Associates, LP | $31.5M | 1.5% | 568,223 | Added |
| Assetmark, Inc | $31.1M | 1.5% | 560,853 | Added |
| Aventail Capital Group, LP | $31.1M | 1.5% | 559,941 | Added |
| Freestone Grove Partners LP | $28.0M | 1.3% | 504,463 | New |
| SIR Capital Management, L.P. | $20.5M | 1.0% | 368,588 | New |
| Bank of America Corp | $19.1M | 0.9% | 343,934 | Added |
Share of 13F holdings is each fund's shares as a share of the 38,394,166 TS shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Merewether Investment Management, LP New+$62.7M
- Holocene Advisors, LP New+$57.2M
- Marshall Wace, LLP Added+$38.6M
- Jane Street Group, LLC Added+$34.2M
- Millennium Management LLC Added+$30.6M
- Bridgewater Associates, LP Added+$29.9M
- Freestone Grove Partners LP New+$28.0M
- CWA Asset Management Group, LLC Added+$26.7M
- Aventail Capital Group, LP Added+$26.2M
- Goldman Sachs Group Inc Added+$25.4M
Biggest sellers in Q2 2026
- Westwood Global Investments, LLC Sold out-$388M
- FMR LLC Trimmed-$82.7M
- Van Eck Associates Corp Trimmed-$23.0M
- Invesco Ltd. Trimmed-$14.8M
- Grantham, Mayo, Van Otterloo & Co. LLC Trimmed-$8.8M
- Renaissance Technologies LLC Trimmed-$8.0M
- Medina Value Partners, LLC Trimmed-$6.6M
- Fearnley Asset Management As Sold out-$6.6M
- Dimensional Fund Advisors LP Trimmed-$4.5M
- State Street Corp Trimmed-$3.3M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $518M and sold $586M; 99 added and 79 trimmed.
Questions about TS ownership
- Who owns TS stock?
- 282 institutional investment managers reported TS positions in their Form 13F filings for Q2 2026, holding 38,394,166 shares worth $2.1B in total. FMR LLC reported the largest position.
- Are funds buying or selling TS?
- In Q2 2026, 51 managers opened new TS positions, 99 added, 79 trimmed and 31 sold out. Managers that filed in both quarters sold a net 896,794 shares.
- How current is this TS institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to TS by CUSIP. Options are left out. TS news and filings · TS insider trades · Top funds