To assess whether IBERDROLA SA is suitable to issue hybrid bonds, we must evaluate its financial health, creditworthiness, and existing capital structure based on the provided 2022 annual report data.

**1. Financial Strength and Profitability:**
*   **Revenue Growth:** Revenue increased significantly from €39.1 billion in 2021 to €53.9 billion in 2022, indicating strong top-line growth.
*   **Profitability:** The company reported a Net Profit attributable to owners of the parent of €4.34 billion in 2022, up from €3.89 billion in 2021. EBITDA also grew from €12.0 billion to €13.2 billion. This demonstrates robust earnings capacity to service debt obligations, including the discretionary coupons often associated with hybrid bonds.
*   **Cash Flow:** Cash flows from operating activities were strong at €10.44 billion, providing ample liquidity.

**2. Leverage and Capital Structure:**
*   **Equity Base:** Total Equity stands at €58.1 billion, with Equity Attributable to Owners of the Parent at €41.1 billion. This provides a substantial buffer for creditors.
*   **Debt Levels:** Noncurrent Financial Liabilities are €44.2 billion, and Current Financial Liabilities are €25.1 billion, totaling roughly €69.3 billion in financial debt. While significant, this is typical for a large utility infrastructure company.
*   **Existing Hybrids:** The data shows "Instrumentos De Capital Con Caracteristicas De Pasivo Financiero" (Financial Instruments with characteristics of financial liabilities, often referring to hybrids/perpetuals) of €576 million (non-current) and €87 million (current). The presence of these instruments indicates the company already utilizes hybrid capital and has established market access for such instruments.
*   **Interest Coverage:** Finance Costs were €3.04 billion against an Operating Profit (EBIT) of roughly €8.0 billion (derived from Operating Profit before tax/finance costs). The interest coverage ratio is healthy (>2.5x), suggesting the company can comfortably handle additional interest-like payments.

**3. Credit Profile and Market Perception:**
*   **Investment Grade Characteristics:** The combination of regulated utility assets (stable cash flows), strong EBITDA margins, and manageable leverage ratios typically supports an investment-grade credit rating. Hybrid bonds are most attractive to issuers with investment-grade ratings because they allow for equity credit treatment (usually 50% equity credit by rating agencies) while paying a higher coupon than senior debt but lower than pure equity.
*   **Dividend History:** The company pays dividends (€0.18 per share recognized, €0.31 proposed), signaling a commitment to returning capital to shareholders, which aligns with the profile of companies that issue hybrids to optimize their capital structure without diluting existing shareholders immediately.

**Conclusion:**
IBERDROLA SA exhibits strong financial performance, stable cash flows typical of the utility sector, and an existing framework for hybrid instruments. Its leverage is manageable, and its profitability is robust. These factors make it a prime candidate for issuing hybrid bonds to optimize its weighted average cost of capital (WACC) and strengthen its equity base for rating agency purposes. Therefore, it is strongly suitable.

<answer>Strongly Suitable</answer>