Sondotécnica Engenharia de Solos S.A

What it is

Founded in 1954 with the initial goal of investigating and surveying soil, Sondotécnica gradually widened its range of services to include dam studies and consulting for hydroelectric construction. Today it is a pure engineering-consulting firm: it does not build anything itself, but it tells those who do whether and how to build — doing feasibility studies, master plans, designs, and on-site supervision.

With heavy investment in research, training, and qualifications, the company diversified its areas of work and today serves multiple infrastructure segments, with a focus on project execution, management, inspection, and supervision; it claims leadership in engineering consulting in Brazil, with more than 3,000 projects completed and more than 400 clients served. Those clients span transport, sanitation, housing, urbanisation, energy, environment, irrigation, and industry.

Who owns it

Shares trade on the B3 exchange under three tickers — SOND3 (ordinary voting shares), SOND5, and SOND6 (two classes of non-voting preference shares). SOND5 and SOND6 each represent one-third of total capital and carry no voting rights.

Control, accordingly, rests entirely with the holders of the ordinary SOND3 shares.

The structured data shows insiders hold about 26.5% of equity; the company’s own site credits its origin to a founder named Jaime — whose Polish-Brazilian family arrived in Brazil in the 1920s, who trained at the National School of Engineering in Rio de Janeiro, and who founded Sondotécnica at the age of 25. The precise current breakdown between the controlling group and the free float is not disclosed in available public sources.

Who runs it

The investor-relations contact listed in company filings is Fábio Bergman, reachable at the Botafogo headquarters. The names of the chief executive and chief financial officer are not individually disclosed in the company’s public filings or investor-relations pages at the time of writing.

On governance and quality, the company holds ISO 9001:2015 (quality management), ISO 14001:2015 (environmental management), and ISO 45001:2018 (occupational health and safety) certifications, all accredited by DNV-GL. It is also the only Brazilian engineering firm to have signed a formal agreement with MIT.

The money, in plain words

Revenue has grown 39% in two years — from R$163m (~US$31.6m) in 2023 to R$226m (~US$43.9m) in 2025 (our calculation from structured data). Net profit over the same stretch nearly tripled, from R$11.9m (US$2 mn) to R$35.7m (~US$6.9m), a sign that scale is flowing cleanly to the bottom line rather than being eaten by rising costs.

It keeps about 14.6 cents of profit from every real of sales — a net profit margin of 14.6%, strong for a consulting firm. More striking is what it earns for its owners: for every real of equity on the books, it generates roughly 48 cents of annual profit — a return on equity of 47.7%, a level that most industrial companies would envy.

The stock trades at just 5.6 times earnings (a price-to-earnings ratio of 5.6×), cheap by almost any measure, which likely reflects its tiny size and thin trading liquidity. The balance sheet carries no reported debt and holds R$16.7m (~US$3.2m) in cash (our calculation), leaving the company financially clean.

What it is doing now

In August 2025, Sondotécnica formed a new special-purpose entity — Consórcio Infragestão Rodoviária — to execute a road-management contract signed with DNIT, Brazil’s national road infrastructure agency. This is the type of long-duration government supervision contract that anchors revenues for years.

In May 2026, the company called a shareholder meeting to seek approval to be reclassified as a “Companhia de Menor Porte” (smaller-company category) under Brazil’s CVM securities rules — a lighter regulatory regime that would reduce compliance costs without changing its listing status.

What to watch

• Brazil’s infrastructure pipeline. Sondotécnica’s revenues rise and fall with government spending on roads, sanitation, and energy. A federal budget squeeze or project delays translate directly into fewer mandates.
• Governance transparency. The company does not publicly name its chief executive or disclose the full ownership split. For a listed firm, that is an unusual gap — and a risk for outside investors who cannot easily track who is making decisions.
• The earnings quality test. The jump in net income from R$14.6m (US$3 mn) (2024) to R$35.7m (US$7 mn) (2025) is large; confirming that it reflects real contract revenue, not one-off accounting items, is the key question for the next set of results.
• Liquidity. With a market value of R$192m (~US$37m) spread across three share classes, daily trading volumes are thin. The price can move sharply on small orders — that cuts both ways.

This is news, not investment advice.