SAN FAUSTIN S.A. - 12 Dec 2025 SCHEDULE 13D/A Report for Tenaris S.A. Ordinary Shares, $1.00 par value per share (TS)

Filing Manager
SAN FAUSTIN S.A.
Reporting Manager
SAN FAUSTIN S.A.
Security
Tenaris S.A. Ordinary Shares, $1.00 par value per share
Symbol
TS
Shares outstanding
1,020,093,525 shares
Disclosed Ownership
711,005,187 shares
Ownership
69.7%
Form type
SCHEDULE 13D/A
Filing time
17 Dec 2025, 16:01:10 UTC
Date of event
12 Dec 2025
Previous filing
19 Sep 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN 69.7% 711,005,187 0 711,005,187 ROCCA & PARTNERS STICHTING ADMINISTRATIEKANTOOR AANDELEN SAN FAUSTIN /s/ Fernando J. Mantilla / Attorney-in-fact
SAN FAUSTIN S.A. 69.7% 711,005,187 0 711,005,187 SAN FAUSTIN S.A. /s/ Fernando J. Mantilla / Attorney-in-fact 0001429586
TECHINT HOLDINGS S.A R.L. 69.7% 711,005,187 711,005,187 0 TECHINT HOLDINGS S.A R.L. /s/ Fernando J. Mantilla / Attorney-in-fact