Naturgy Energy Group SA appears **Strongly Suitable** for hybrid bond issuance.

Key reasons:

- **Sector and cash-flow profile are supportive:** Naturgy is a large Spanish energy group with significant regulated or quasi-regulated utility and energy infrastructure characteristics. Utilities and energy infrastructure businesses are among the most natural hybrid issuers because their cash flows are relatively visible, capital intensity is high, and rating agencies typically give partial equity credit to well-structured hybrids.

- **Established hybrid issuer:** The company has already issued hybrid bonds, with first issuance in **2013** and further issuance in **2021 or 2022**. This is a strong positive signal: it demonstrates capital-market access, investor familiarity, and management willingness to use hybrids as part of the capital structure.

- **Investment-grade-style leverage metrics:** S&P Net Debt / EBITDA of **2.67x** and S&P FFO / Net Debt of **28.47%** are consistent with a solid BBB-area credit profile rather than a distressed or speculative-grade profile. These are precisely the kinds of metrics where hybrid equity credit can be useful in preserving rating headroom.

- **Large capital base and recurring capex needs:** Naturgy has a substantial asset base, including **€17.4bn of property, plant and equipment** and **€28.4bn of noncurrent assets**, with annual investment cash outflows of about **€1.7bn** for PP&E/intangibles and other noncurrent assets. This supports a credible funding rationale for hybrid issuance.

- **Strong operating cash generation:** EBITDA increased to **€4.95bn** in 2022 from **€3.53bn** in 2021, and operating cash flow rose materially to **€4.24bn** from **€1.00bn**. This supports coupon service capacity and reduces concerns about coupon deferral risk.

- **Balance sheet benefit is meaningful:** Naturgy has sizeable financial liabilities, with noncurrent financial liabilities of about **€14.0bn** and current financial liabilities of **€2.3bn**. A hybrid instrument could provide meaningful rating-agency equity credit and support adjusted leverage and FFO/debt metrics.

- **Financial policy credibility:** The company pays significant dividends, with distributions of about **€1.5bn** in 2022, but remains profitable and cash-generative. Existing hybrid issuance suggests that management is familiar with maintaining an efficient capital structure while preserving credit metrics.

- **Market environment was less favorable in 2022 but still accessible:** Rates and spreads rose sharply in 2022, making hybrids more expensive, but Naturgy’s established issuer status and utility profile should support investor demand. The higher market cost affects timing and pricing, but not overall suitability.

Potential offsetting considerations include the fact that Moody’s adjusted leverage trend was **improving**, so a hybrid may not be strictly necessary to prevent deterioration. However, the company’s sector, capital intensity, existing hybrid track record, investment-grade profile, and clear balance-sheet/rating rationale outweigh this.

<answer>Strongly Suitable</answer>