Security key
88031M109
TENARIS SA - Ordinary Shares, $1.00 par value per share (TS)
CUSIP: 88031M109
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Ordinary Shares, $1.00 par value per share
- Total 13F shares
- 4,487,868
- Total 13F value
- $249,409,744
- Share change
- -6,122,939
- Put/Call ratio
- 141%
- SEC-reported price per share
- $55.49
- Number of holders
- 113
- Value change
- -$357,972,135
- Number of buys
- 50
- Number of sells
- 54
- Shares outstanding
- 1,008,870,971
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
113
Top holders
10
TS full security history
Ownership snapshot
Full 13F holder table
TENARIS SA SEC filings
TENARIS SA company facts
Broader feeds
Ownership snapshot
Top reported holders of TS - TENARIS SA - Ordinary Shares, $1.00 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
SAN FAUSTIN S.A.
Disclosed value leader
SAN FAUSTIN S.A.
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 69%
13D/G row: SAN FAUSTIN S.A.
Showing 1-6 of 15 holder rows.
Quick read
SAN FAUSTIN S.A. leads the comparable SEC ownership view at 69%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens SAN FAUSTIN S.A.'s linked filing trail.
Comparable ownership
Top 5
SAN FAUSTIN S.A.
69%
FMR LLC
0.82%
Westwood Global Investments, LLC
0.66%
RENAISSANCE TECHNOLOGIES LLC
0.32%
VAN ECK ASSOCIATES CORP
0.29%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| SAN FAUSTIN S.A. |
13D/G
|
69%
|
$27,655,736,021
692,085,486 shares
|
-$756,031,252 | 06 Feb 2026 |
| FMR LLC |
13F
Company
|
0.82%
|
$480,087,317
8,251,759 shares
|
— | 31 Mar 2026 |
| Westwood Global Investments, LLC |
13F
Company
|
0.66%
|
$388,276,914
6,673,718 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
0.32%
|
$186,161,106
3,199,744 shares
|
— | 31 Mar 2026 |
| VAN ECK ASSOCIATES CORP |
13F
Company
|
0.29%
|
$168,317,000
2,893,032 shares
|
— | 31 Mar 2026 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
0.24%
|
$139,924,878
2,405,034 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
113
Shares
4,487,868
Rows available
113
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
263
Q2 2026 holders
113
Holder diff
-150
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|