TENARIS SA

NYSE:TSOTC:TNRSF

Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens)·LUXEMBOURG, N4

, organized in Luxembourg, is a manufacturer and supplier of steel pipes and related services for the petroleum industry. The company produces and ships over 4 million tons of pipes annually.

Prospectuses & Registrations

11 shown

Filed	Form	Description
2/25/13	F-6	F-6	→
1/18/11	F-3ASR	F-3ASR	→
8/9/10	F-6EF	FORM F-6EF	→
2/28/08	F-6	F-6	→
4/10/06	F-6EF	F-6EF	→
8/8/03	F-4/A	AMENDMENT NO.1 TO F0RM F-4	→
↓

Ownership

36 shown

Filed	Form	Description
12/9/24	SC 13D/A	AMENDMENT NO. 9 TO SCHEDULE 13D	→
7/30/24	SC 13D/A	AMENDMENT NO. 8 TO SCHEDULE 13D	→
6/4/24	SC 13D/A	AMENDMENT NO. 7 TO SCHEDULE 13D	→
1/22/24	SC 13D/A	AMENDMENT NO.6 TO SCHEDULE 13D	→
11/3/23	SC 13D/A	FORM SC 13D/A	→
6/28/21	SC 13D/A	AMENDMENT NO. 4 TO SCHEDULE 13D	→
↓

Other Filings

38 shown

Filed	Form	Description
2/10/26	SCHEDULE 13D/A	SCHEDULE 13D/A	→
12/17/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
9/19/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
7/8/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
4/30/25	SD	FORM SD	→
2/25/25	SCHEDULE 13D/A	SCHEDULE 13D/A	→
↓

Filing History(750 filings)

TypeDateAccessionPeriodSize

6-K

Mar 6, 2026

0001171843-26-001374FORM 6-K

Mar 5, 2026

23.9 KB

6-K

Mar 4, 2026

0001171843-26-001305FORM 6-K

Mar 3, 2026

90.7 KB

6-K

Feb 24, 2026

0001171843-26-001031FORM 6-K

Feb 23, 2026

37.9 KB

6-K

Feb 23, 2026

0001171843-26-001030FORM 6-K

Feb 19, 2026

22.8 KB

6-K

Feb 23, 2026

0001171843-26-000994FORM 6-K

Feb 20, 2026

120.8 KB

6-K

Feb 20, 2026

0001171843-26-000954FORM 6-K

Dec 31, 2025

1.9 MB

6-K

Feb 19, 2026

0001171843-26-000948FORM 6-K

Feb 18, 2026

336.5 KB

6-K

Feb 17, 2026

0001171843-26-000828FORM 6-K

Feb 13, 2026

82.0 KB

SCHEDULE 13D/A

Feb 10, 2026

0001213900-26-014102

—

20.7 KB

6-K

Jan 5, 2026

0001171843-26-000022FORM 6-K

Jan 2, 2026

168.6 KB

6-K

Dec 29, 2025

0001171843-25-008095FORM 6-K

Dec 26, 2025

133.2 KB

6-K

Dec 22, 2025

0001171843-25-008053FORM 6-K

Dec 19, 2025

212.3 KB

6-K

Dec 18, 2025

0001171843-25-007991FORM 6-K

Dec 17, 2025

43.6 KB

SCHEDULE 13D/A

Dec 17, 2025

0001213900-25-122779

—

19.8 KB

6-K

Dec 15, 2025

0001171843-25-007928FORM 6-K

Dec 12, 2025

175.5 KB

6-K

Dec 8, 2025

0001171843-25-007780FORM 6-K

Dec 5, 2025

190.7 KB

6-K

Dec 1, 2025

0001171843-25-007659FORM 6-K

Nov 28, 2025

190.7 KB

6-K

Nov 24, 2025

0001171843-25-007503FORM 6-K

Nov 21, 2025

247.2 KB

6-K

Nov 17, 2025

0001171843-25-007348FORM 6-K

Nov 14, 2025

78.1 KB

6-K

Nov 3, 2025

0001171843-25-006874FORM 6-K

Nov 2, 2025

17.6 KB

6-K

Oct 31, 2025

0001171843-25-006843FORM 6-K

Oct 30, 2025

15.4 KB

6-K

Oct 30, 2025

0001171843-25-006841FORM 6-K

Sep 30, 2025

902.4 KB

6-K

Oct 30, 2025

0001171843-25-006840FORM 6-K

Oct 29, 2025

271.1 KB

6-K

Oct 1, 2025

0001171843-25-006202FORM 6-K

Sep 30, 2025

30.2 KB

6-K

Oct 1, 2025

0001171843-25-006201FORM 6-K

Sep 30, 2025

155.2 KB

25 filings shown