Spanish energy giant Iberdrola has successfully raised €1 billion (USD 1.16 billion) through the first hybrid green bond issued under the European Green Bond (EuGB) Standard, marking a new milestone for Europe’s sustainable finance market. The offering drew an exceptional €8 billion in orders from over 400 institutional investors worldwide, underscoring the company’s strong market credibility and investors’ confidence in the newly established EU green bond framework.

Europe’s “Gold Standard” for Green Finance

The European Green Bond Regulation, which came into effect in December 2024, introduced a rigorous, taxonomy-aligned framework aimed at strengthening market integrity and combating greenwashing. It requires that 100% of proceeds from EuGB-designated bonds fund EU Taxonomy-aligned economic activities, with a 15% flexibility pocket allowed for sectors that are still awaiting finalized criteria. Issuers must also adhere to strict transparency rules, disclosing their green transition plans, specifying the use of proceeds, and providing detailed impact reporting. The goal: to establish a credible and globally recognized “gold standard” for green bond issuance. By becoming the first corporate to issue a hybrid bond under this new standard, Iberdrola not only demonstrated regulatory readiness but also cemented its leadership position in aligning corporate finance with Europe’s climate objectives.

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Record Demand and Competitive Pricing

Investor appetite for the issue far exceeded expectations, with demand surpassing €8 billion eight times the initial target. Orders came from a diverse mix of investors across Europe, the UK, Asia, and North America, reflecting the international appeal of the new EU framework and the growing institutional shift toward climate-aligned debt instruments. The surge in demand enabled Iberdrola to tighten pricing and secure a coupon of just 3.75%, the lowest among hybrid bonds issued globally in 2025. Hybrid bonds often treated as part equity and part debt offer long-term financing flexibility while preserving credit metrics, making them an increasingly popular choice for companies with ambitious sustainability goals.

“The volume of demand and the conditions set once again demonstrate the level of confidence of the market and investors in the soundness and solvency of the Group’s business and growth plans,” Iberdrola said in its statement.

Reinforcing a Long-Term Green Finance Strategy

Iberdrola has long positioned itself at the forefront of sustainable finance and renewable energy investment. The company’s sustainable financing exceeded €60 billion by the end of 2024, with 94% of total new financing classified as green or sustainable. The firm’s financing roadmap aims for two-thirds of its total debt to be sustainable by 2025, channeling proceeds into projects spanning renewable generation, energy efficiency, clean transportation, and circular economy initiatives. This latest issuance directly supports Iberdrola’s long-term investment strategy to accelerate Europe’s energy transition. The company continues to expand its renewable generation footprint across wind, solar, and hydroelectric assets, while modernizing grids to support electrification and decarbonization.

Strengthening Market Confidence in the EuGB Framework

For regulators and investors alike, Iberdrola’s successful debut is a litmus test for the EuGB Standard’s viability. The oversubscription and favorable pricing signal that the market is not only ready for but enthusiastic about more rigorous green finance instruments that combine transparency, accountability, and impact assurance. Analysts note that the transaction may set a benchmark for other European utilities and corporates preparing to issue under the new regime. Its success could catalyze broader adoption of taxonomy-aligned capital raising, helping bridge the estimated €700 billion annual investment gap required to meet EU climate and energy targets.

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A Template for Europe’s Sustainable Transition

With this landmark bond, Iberdrola has once again demonstrated its ability to lead both on energy transition and sustainable financing innovation. By linking its funding strategy directly to the EU’s most stringent sustainability criteria, the company has provided a blueprint for how corporations can blend capital market competitiveness with climate accountability. As Europe scales its green finance ambitions under the EuGB regime, Iberdrola’s issuance stands as a pivotal case study: strong investor trust, credible environmental integrity, and market-defining innovation can coexist delivering returns for shareholders while accelerating the continent’s path to net zero.

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