Latest Period
Q1 2026
Security Snapshot
TENARIS SA - Ordinary Shares, $1.00 par value per share (TS) Institutional Ownership
CUSIP: 88031M109
13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026
Institutions Reporting
262
Shares (Excl. Options)
39,329,028
Price
$58.18
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- Security type / class
- Equity / Ordinary Shares, $1.00 par value per share
- Symbol
- TS on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 39,329,028
- Total 13F value
- $2,288,537,763
- Portfolio coverage rank
- 0%
- Share change
- +6,424,710
- Value change
- +$415,300,448
- Number of holders
- 262
- Shares outstanding
- 1,008,870,971
- SEC-reported price per share
- $59.99
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- TS - TENARIS SA - Ordinary Shares, $1.00 par value per share is tracked under CUSIP 88031M109.
- 262 institutions reported positions in Q1 2026.
- 1 significant owner is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 229 to 262 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $1,266,140,368 to $2,288,537,763.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 262 institutions filings for Q1 2026.
Security key
88031M109
Latest holder period
Q1 2026
13F holders
262
13D/G owners
1
CIK / CUSIP context first
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 88031M109:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
1
Security
TS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| SAN FAUSTIN S.A. | 69% | -1.6% | $27,655,736,021 | -$756,031,252 | 692,085,486 | -2.7% | SAN FAUSTIN S.A. | 06 Feb 2026 |
As of 31 Mar 2026, 262 institutional investors reported holding 39,329,028 shares of TENARIS SA - Ordinary Shares, $1.00 par value per share (TS). This represents 3.9% of the company’s total 1,008,870,971 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
49
Latest
Q1 2026
Rows shown
1-25 of 49
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 39,329,028 | $2,288,537,763 | +$415,300,448 | $58.18 | 262 |
| 2025 Q4 | 32,927,189 | $1,266,140,368 | -$94,332,912 | $38.45 | 229 |
| 2025 Q3 | 35,694,308 | $1,276,834,263 | -$370,497,729 | $35.77 | 220 |
| 2025 Q2 | 45,891,964 | $1,708,084,599 | -$183,845,232 | $37.40 | 220 |
| 2025 Q1 | 50,748,772 | $1,984,794,448 | +$22,057,160 | $39.11 | 222 |
| 2024 Q4 | 49,785,304 | $1,881,283,894 | -$53,363,075 | $37.79 | 228 |
| 2024 Q3 | 49,963,013 | $1,589,188,375 | -$165,633,083 | $31.79 | 194 |
| 2024 Q2 | 55,617,977 | $1,697,523,741 | -$47,445,506 | $30.52 | 217 |
| 2024 Q1 | 55,824,978 | $2,192,303,496 | -$226,942,299 | $39.27 | 231 |
| 2023 Q4 | 62,225,265 | $2,162,905,063 | +$43,050,602 | $34.76 | 218 |
| 2023 Q3 | 61,353,143 | $1,938,840,255 | -$235,526,632 | $31.60 | 213 |
| 2023 Q2 | 68,887,694 | $1,932,776,186 | +$356,543,526 | $29.95 | 195 |
| 2023 Q1 | 52,881,632 | $1,502,899,424 | +$22,869,602 | $28.42 | 219 |
| 2022 Q4 | 50,549,126 | $1,777,398,368 | -$723,380,433 | $35.16 | 214 |
| 2022 Q3 | 71,778,650 | $1,657,488,823 | +$403,842,075 | $25.84 | 174 |
| 2022 Q2 | 48,838,496 | $1,254,803,520 | -$228,996,255 | $25.69 | 174 |
| 2022 Q1 | 57,590,730 | $1,727,768,479 | +$235,300,826 | $30.07 | 174 |
| 2021 Q4 | 49,985,524 | $1,042,782,873 | +$25,503,117 | $20.86 | 140 |
| 2021 Q3 | 48,724,861 | $1,028,543,854 | -$125,301,335 | $21.11 | 127 |
| 2021 Q2 | 54,512,016 | $1,193,625,802 | -$81,368,027 | $21.90 | 141 |
| 2021 Q1 | 58,157,561 | $1,319,534,126 | -$98,063,929 | $22.69 | 123 |
| 2020 Q4 | 63,004,116 | $1,004,935,719 | -$24,546,133 | $15.95 | 124 |
| 2020 Q3 | 65,637,514 | $646,559,838 | -$61,139,682 | $9.85 | 113 |
| 2020 Q2 | 70,930,500 | $917,503,476 | +$15,951,457 | $12.93 | 123 |
| 2020 Q1 | 70,060,797 | $844,282,655 | -$255,155 | $12.05 | 121 |