Hochtief's Double-Edged Rally: Scarcity and Commodity Bet Fuel a 200% Surge, but Thiess Price Tag Looms Large

Hochtief's 200% rally: low float and DAX inclusion, plus Thiess full acquisition for mining growth. But high valuation and 42% volatility signal risk.

Hochtief’s blistering 200% climb over the past twelve months reads like a textbook case of structural scarcity meeting relentless demand. Only about one-fifth of the shares are in free float, with Spanish parent ACS controlling the remaining 80%. When the Essen-based builder joined the DAX at the end of June, passive funds were forced to buy into a miniscule float, turbocharging an already powerful rally. Yet beneath this mechanical lift lies a more fundamental story—one that now includes a costly bet on mining and the rising tide of critical minerals.

On Thursday, Hochtief’s Australian subsidiary CIMIC closed the acquisition of the remaining 40% stake in mining services giant Thiess from Elliott, paying roughly €720 million. Combined with an earlier tranche, the total bill exceeds €900 million. Thiess employs over 15,000 people and generates annual sales of around AUD 6 billion. The move gives Hochtief full control over a business that is pivoting hard toward lithium and copper just as global appetite for those materials accelerates.

Operational firepower masks the valuation risk

Sceptics point to the stock’s red-hot valuation as the biggest red flag. At €487.60, the shares have slipped below the 50-day moving average, and some investors are locking in gains. A failure to reclaim the €492 level could open the door to a deeper correction toward €450. The technical picture is further complicated by a one-year volatility reading of nearly 42%—extraordinary for a conventional construction group.

Yet the operating numbers provide plenty of ballast. First-quarter net income jumped 30% to €217 million, while the order book hit a record €79 billion. The US subsidiary Turner alone scooped up $12.1 billion in new contracts in the first quarter, with data-centre projects for artificial intelligence now accounting for 37% of its pipeline. On home turf, Germany’s new infrastructure law promises faster planning approvals, which should accelerate revenue recognition in the domestic business.

Mining cash flows now stay in-house

The Thiess deal fundamentally changes the cash-flow dynamic. Previously, Hochtief shared mining profits with an outside partner; now every dollar from the mining segment flows straight back into the group. CIMIC’s mining order book stands at AUD 38 billion, representing roughly 37% of the entire group’s backlog. As copper prices continue their upward trajectory, Thiess stands to benefit across key regions such as Australia and Nevada.

Management also faces the delicate task of transitioning away from thermal coal. Coal-fired power generation now accounts for 26% of revenue, and the target is to push that below 25% next year. The full ownership of Thiess gives Hochtief greater control over the pace of that shift, but it also means bearing the entire burden of the transition.

The ultimate test: can the numbers match the hype?

With an RSI of 50, the stock is neither overbought nor oversold in the near term. The gap to the 200-day moving average remains a chunky 31%, a sign that the long-term trend is firmly intact. On a monthly basis, the shares have added roughly 4%, and the year-to-date gain stands at an impressive 46%.

The next quarterly report will serve as the pivotal catalyst. Investors will scrutinise how quickly the Thiess integration boosts margins and whether the US data-centre boom continues to fill the order book. For now, the rally enjoys twin support: the structural scarcity of the shares and the genuine operational momentum. But if earnings fail to justify the premium, the passive-driven gains can evaporate just as fast as they arrived. The order backlog of €79 billion must now deliver the profits the market is already pricing in.