Who owns Dalmine?
Dalmine is owned by Tenaris (Luxembourg, NYSE: TS).[1]
Evidence: Tenaris S.A. Annual Report on Form 20-F filed 2026-03-31, SEC EDGAR, 31 March 2026. Verified from filings; last checked .
Key facts
- Current owner
- Tenaris S.A. verified
- Owner HQ
- 🇱🇺 Luxembourg, Luxembourg
- Origin
- 🇮🇹 Italy
- Category
- Energy › Oil & gas › Oilfield services & drilling
- Parent ticker
- NYSE: TS
- Last verified
- · 1 sources
About Dalmine
Dalmine S.p.A. is a leading Italian producer of seamless steel pipe and a 100 percent owned Tenaris subsidiary, per the 20-F.
What Tenaris's annual report says about Dalmine
Sentences about Dalmine from Tenaris's latest annual filing[1], copied word for word.
("Dalmine"), a leading Italian producer of seamless steel pipe products; Confab Industrial S.A. ("Confab"), the leading Brazilian producer of welded steel pipe products; Algoma Tubes Inc. ("AlgomaTubes"), a Canadian producer of seamless and welded steel pipe products; S.C.
The Dalmine facility comprises: a steel shop, including an electric arc furnace, three ladle furnaces, two vacuum degassing and two continuous casters with their dedicated cooling beds; a retained mandrel mill with two in-line-high-productivity finishing lines including one heat treatment; a rotary expander with a finishing line including a heat treatment; and two premium connection threading lines.
In order to reduce the cost of electrical energy at our operations in Dalmine, we operate a gas-fired, combined heat and power station with a capacity of 120 MW in Dalmine.
How often Tenaris names Dalmine in its annual report
A plain count of the times the name appears in the text of each annual report, not counting the start of a sentence. A brand that an owner writes about more is usually one it treats as central. The brand is named more often than it was three years earlier.
Ownership timeline of Dalmine
Where Dalmine sits in Tenaris
Controlling ownership as of . Brands grouped under the entity that owns them; large groups are collapsed.
Open the full Tenaris ownership tree →
See the full Tenaris brand portfolio (5) →
Other brands owned by Tenaris
Tenaris controls 5 brands on Brandtree, 5 of them in energy.
Also in energy
Other brands in oilfield services & drilling, and who owns them
Tenaris has more brands in oilfield services & drilling on Brandtree than any other owner: 4 of 17.
| Brand | Owner | Owner based in |
|---|---|---|
| BENTEC | Helmerich & Payne | 🇺🇸 United States |
| Bently Nevada | Baker Hughes | 🇺🇸 United States |
| Pintail Completions | RPC | 🇺🇸 United States |
| ChampionX | SLB | 🇺🇸 United States |
| FlexSteel | Cactus | 🇺🇸 United States |
| Citadel Casing Solutions | Innovex | 🇺🇸 United States |
| Ulterra | Patterson-UTI | 🇺🇸 United States |
| PROPWR | ProPetro | 🇺🇸 United States |
About the owner: Tenaris
Tenaris is a publicly listed company headquartered in Luxembourg, Luxembourg. Brandtree records 5 brands under its control, and it is listed as NYSE: TS.
Tenaris S.A. is a Luxembourg company that its 2025 Form 20-F says grew from Siderca, formed in 1948. San Faustin S.A. beneficially owned 66.13 percent of its share capital and 70.07 percent of the votes at 31 December 2025; 28.17 percent traded on the Italian and Mexican exchanges and its ADSs trade on the NYSE.
🇮🇹 Dalmine and other Italian brands
Brandtree records a controlling owner for 209 brands that began in Italy. 76 of them (36%) are now controlled by a company headquartered in another country, Dalmine among them.
- Enilive — Eni 🇮🇹
- Hera Comm — Hera 🇮🇹
- Iren Mercato — Iren 🇮🇹
- ATV Azienda Trasporti Verona — FNM 🇮🇹
- Academia Barilla — Barilla 🇮🇹
- Acquaviva — Vandemoortele 🇧🇪
Frequently asked questions
Who is the parent company of Dalmine?
The parent company of Dalmine is Tenaris, a publicly listed company headquartered in Luxembourg.
Is Dalmine Italian or Luxembourgish?
Dalmine originated in Italy, but it is owned today by Tenaris, which is headquartered in Luxembourg. So Dalmine is an Italian-origin brand under Luxembourgish ownership.
Is Dalmine still owned by Tenaris?
Yes. As of 10 October 2026, Dalmine is still owned by Tenaris. The ownership record was last checked against primary sources on that date.
Sources (1) & corrections
Last verified . Every ownership fact above is backed by one of these primary documents. Numbers in brackets in the text refer to this list.
- [1] Tenaris S.A. Annual Report on Form 20-F filed 2026-03-31 — SEC EDGAR, SEC Form 20-F, published 31 March 2026; retrieved 5 October 2026.
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