Based on the provided data, here is an assessment of Naturgy Energy Group SA’s suitability for issuing hybrid bonds:

**Reasoning:**
1.  **Issuance History & Sector:** The entity has issued hybrid bonds since 2013, including in 2021 or 2022. Naturgy operates in the gas and electricity utility sectors, which are prime candidates for hybrid bonds under the "Strongly Suitable" guidelines (regulated/quasi-regulated/utility).
2.  **Financial Profile:** The company has a significant investment-grade-like leverage profile (S&P Net Debt/EBITDA of 2.67x for 2022) and an FFO/Net Debt ratio that, while not stellar, is solid. The Moody's adjusted leverage trend is "Improving."
3.  **Refinancing Rationale:** With a first issuance in 2013 and subsequent issues (including 2021/2022), the company is likely approaching or has recently managed call dates, fitting the "strong refinancing rationale" and "existing hybrid bond approaching its first call date" criteria.
4.  **Market Conditions:** The interest rate environment shifted dramatically in 2022 (SWAP curve flipping from negative to positive). Issuing a hybrid in a higher-rate environment could be costly, but for a utility with stable cash flows, it remains a viable and core funding instrument to manage the capital structure efficiently without diluting equity, especially as rates rise. The company’s massive capex program (€1.7B outflow for PP&E/intangibles) and M&A history justify the funding need.
5.  **Business Risk:** Naturgy’s operations span regulated networks, unregulated renewables, and energy supply, fitting squarely within the "Strongly Suitable" to "Marginally Suitable" range, leaning heavily toward the former given its incumbent status and scale.

**Final Assessment:** Given the existing hybrid program, the utility business profile, the solid investment-grade metrics, and the ongoing need to fund capital investments and refinance subordinated debt, the company is strongly suitable.

<answer>Strongly Suitable</answer>