Companhia Siderúrgica Nacional

What it is

CSN is the largest fully integrated steel producer in Brazil and one of the largest in Latin America by crude steel output. Its main plant sits in Volta Redonda, in the state of Rio de Janeiro — a mill built with American financing during World War II that still anchors the whole enterprise.

Steel is the core, but CSN long ago grew into a five-legged industrial group. Its other divisions mine iron ore, make cement, run railways and ports, and generate renewable power — each generating its own revenue stream but also sharing the same debt burden.

• Steel: annual crude steel capacity of 5.6 million tonnes, producing slabs, hot- and cold-rolled, galvanised and tin-mill products.
• Mining: iron ore extraction, with CSN owning its own ore source at the Casa de Pedra mine in Minas Gerais.
• Cement: seven integrated cement plants in Brazil with installed capacity of 17 million tonnes per year.
• Logistics: railways, ports, and road haulage — including a stake in MRS Logística and the port at Itaguaí.
• Energy: hydroelectric and thermoelectric generation.

Who owns it

Benjamin Steinbruch is the controlling shareholder of CSN. His holding vehicle, Vicunha Siderúrgica, controls the group; insiders collectively hold about 55% of the shares, leaving roughly 33% as a publicly traded free float and about 12% with institutional investors (EODHD).

The Brazilian government sold its 91% interest in the company through a series of privatisation auctions in 1993 and early 1994.

The decisive moment came in 1995, when one large shareholder withdrew from the privatisation consortium and Steinbruch — then chief executive of Vicunha — became CSN’s chairman. He has not let go since, now holding the top three roles simultaneously.

Who runs it

Benjamin Steinbruch has been Chairman of the Board since April 1995 and Chief Executive Officer since April 2002, also taking personal responsibility for mining and railway assets. Combining the chair and CEO roles in one person is unusual for a company of this size and is a governance point worth noting.

Antonio Marco Campos Rabello has served as Chief Financial Officer since March 18, 2024, overseeing treasury, controllership, tax, accounting, and investor relations.

The money, in plain words

CSN sells about R$44.8bn (US$8.7bn) of goods and services a year, a modest 2.5% rise from fiscal 2024 (our calculation). The problem is not on the revenue line — it is below it: the company is losing money at the bottom, posting a net loss of R$2.0bn (US$388m) in fiscal 2025, a net margin of –4.5% (our calculation).

The culprit is debt. CSN carries gross borrowings of R$54.0bn (US$10.5bn) against cash of R$14.4bn (US$2.8bn), leaving net debt of R$39.6bn (US$7.7bn, our calculation) — more than three times the company’s own book value of equity.

The interest bill on that debt is consuming the operating profit that the factories actually generate, turning a respectable operating result into a bottom-line loss. Return on equity is –8.3%, meaning owners are watching their stake shrink, not grow.

What it is doing now

Steinbruch has announced a strategy of accelerating asset sales and sharply reducing leverage, naming Brazil’s structurally high interest rates as the trigger. CSN will sell its controlling interest in CSN Cimentos as the centrepiece of the plan, with the process formally launched in early 2026.

Market sources value the cement unit at more than R$10bn (US$2bn), though CSN has not disclosed pricing expectations.

The cement sale is one part of a broader plan that also includes divesting a significant stake in CSN Infraestrutura, with an overall objective of cutting gross debt by approximately R$15bn (US$2.9 bn)–R$18bn (US$3.5 bn) through asset sales.

What to watch

• Cement sale price and timing. The transaction could be completed by end-2026, subject to regulatory approval. Any shortfall from the R$10bn (US$1.9 bn)+ expectation would leave the debt problem only partly solved.
• Brazil’s interest rates. The cost of carrying R$54bn (US$10.5 bn) in gross debt moves in lockstep with domestic rates; any relief from Brazil’s central bank directly improves CSN’s bottom line.
• Steel margins. The company’s flagship plant at Volta Redonda is operating at reduced capacity with one blast furnace idle — a signal that the steel business itself needs capital investment at precisely the moment cash is scarce.
• Governance concentration. With one man as founder-heir, chairman, and CEO controlling a 55% block, minority shareholders have limited recourse if the asset-sale strategy miscarries.

This is news, not investment advice.