Naturgy: When Private Capital Buys a Utility and Cannot Leave

Naturgy is a case study in what happens when private capital acquires control of critical national infrastructure and then cannot easily sell it. Successive investment funds accumulated large stakes, the free float collapsed, a foreign takeover attempt was abandoned, and the company eventually had to buy its own shares to restore a functioning market in them. This analysis covers both the business and the ownership problem. It is part of the Spain Company Stories hub.

How did the ownership become a problem?

Through successive private equity and infrastructure fund investments that individually made sense and collectively removed the market. Large stakes accumulated with financial investors alongside a Spanish industrial holding shareholder, leaving a free float too small for meaningful trading.

That creates specific difficulties for a listed company. Index inclusion depends on free float, institutional investors cannot build positions without moving the price, valuation becomes unreliable, and the shares stop functioning as an acquisition currency or an employee incentive.

A foreign takeover approach was explored and abandoned in 2024, which left the situation unresolved: shareholders wanting an exit, no buyer for the whole company, and a stock that could not absorb a large placing.

What did the tender offer achieve?

It used the company’s own balance sheet to solve a shareholder problem. Naturgy repurchased €2,332m of its own shares in a voluntary tender offer completed in June 2025, then placed portions back into the market — €495m in August and €879m in October — under its 2025–2027 strategic plan.

The sequence is unusual and effective: buy shares from investors who want out, then sell them gradually to investors who want in, using the company as the intermediary that the market could not otherwise provide.

The result was a substantially increased free float and improved liquidity, which the company explicitly linked to its ability to operate normally as a listed business. Net debt to EBITDA stood at 2.3 times even after the repurchase, indicating the balance sheet absorbed it comfortably.

What is the gas business actually worth now?

More than the transition narrative suggests, at least for the next decade. Naturgy finalised commercial and pricing conditions through 2027 for its pipeline gas supply from Algeria and secured new liquefied natural gas supply agreements with the United States, which is the core of a supply portfolio serving Spanish and international demand.

Gas retains two roles that are difficult to replace: industrial process heat, where electrification is technically hard, and electricity system balancing. Naturgy operates 17 combined-cycle units across 10 Spanish sites, and the company emphasised their role in ensuring security of electricity supply.

That last point acquired new force in 2025. After the April blackout, the value of dispatchable generation providing voltage support and system stability became a live regulatory and commercial question rather than a legacy consideration.

What is the dividend policy?

Explicit and rising. Under the 2025–2027 strategic plan presented in February 2025, Naturgy set a dividend trajectory increasing from a minimum of €1.70 per share in 2025 to €1.80 in 2026 and €1.90 in 2027, conditional on maintaining a BBB credit rating.

Total dividends distributed in 2025 amounted to around €1.7bn, against net profit of €2.023bn — a high payout ratio that reflects the mature, cash-generative character of network and supply businesses.

The credit rating condition is the discipline. Tying the dividend to a rating threshold gives bondholders comfort and constrains the shareholders who might otherwise prefer maximum distribution from an infrastructure asset.

How does Naturgy compare with its Spanish peers?

It is the gas specialist in a market where Iberdrola is the electricity network champion and Repsol is the integrated oil and retail player. The three overlap in retail energy supply and in renewables while remaining structurally different businesses.

Naturgy’s distinguishing asset is the gas value chain: supply contracts, liquefied natural gas access, transport and distribution networks, and the combined-cycle fleet that converts gas into electricity when the system needs it.

Its distinguishing weakness is the same thing. A company built around gas in a system moving toward electrification has a longer-dated transition problem than a company built around wires, and the biomethane initiatives it has begun — 170 GWh now integrated into Spanish gas networks — are early-stage relative to the scale of the network they must eventually fill.

What does the Latin American business contribute?

Regulated distribution earnings in markets with growing demand, alongside the currency and political risk that accompanies them. Naturgy has held gas and electricity distribution positions across several Latin American countries for decades.

The strategic value is the same as for any regulated network: predictable returns on an asset base that grows with connections. The complication is that regulatory settlements in emerging markets can be revised more abruptly than in Europe, and tariff decisions carry direct political weight.

For a company that has spent recent years focused on domestic ownership questions, the international portfolio has been a stable contributor rather than a strategic focus, which is a reasonable position for assets of this type to occupy.

What is biomethane’s role?

Small today and strategically significant. Naturgy has been integrating biomethane into the Spanish gas networks, reaching 170 GWh, which is a fraction of gas demand but establishes the technical and regulatory pathway.

The strategic argument is that gas networks retain value if the molecule flowing through them can be decarbonised. Biomethane from agricultural and municipal waste, and potentially hydrogen blending, would allow existing infrastructure to survive an electrification transition rather than becoming stranded.

The honest assessment is that available biomethane volumes across Europe are far below current gas demand, so this can decarbonise part of the network rather than all of it. Which parts survive, serving which customers, is the strategic question every European gas distributor faces.

Why does the combined-cycle fleet matter more now?

Because a system that failed in April 2025 has rediscovered the value of dispatchable generation. Naturgy operates 17 combined-cycle gas units across 10 Spanish sites, and the company explicitly emphasised their role in security of electricity supply in its 2025 results.

These plants run relatively few hours in a system dominated by renewables, which makes their economics dependent on capacity payments and on the price spikes that occur when renewable output is low. That is a volatile revenue model and a necessary one.

The regulatory direction after the blackout is likely to increase the value of firm capacity and system services, which improves the economics of exactly this fleet. The plants that looked like stranded assets in 2020 look considerably more strategic in 2026.

What does the ownership episode teach?

That infrastructure assets held by financial investors eventually need an exit, and that suitable exits for systemically important utilities are scarce. A trade buyer faces political scrutiny, a listing requires a market that concentrated ownership has destroyed, and another fund simply defers the problem.

The Naturgy resolution was creative and expensive: the company itself provided the liquidity, buying shares from exiting investors and reselling them gradually into a market that could absorb smaller amounts.

For policymakers, the episode is an argument for attention to free float in strategically significant listed companies. For investors, it is a reminder that entry into a concentrated register is considerably easier than exit from one.

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