Based on the provided annual report facts for IBERDROLA SA and the S&P rating methodology guidelines, here is the assessment:

**1. Business Profile and Cash Flow Visibility:**
Iberdrola is a major global utility company with significant operations in regulated electricity and gas networks, as well as renewable generation. The data shows substantial Property, Plant, and Equipment (€86.3 billion) and Intangible Assets (€20.1 billion), characteristic of infrastructure-heavy utilities. The company generates stable and growing cash flows, with an EBITDA of €13.2 billion in 2022 (up from €12.0 billion in 2021) and Operating Profit of €7.98 billion. According to the "Regulated Utilities" section of the methodology, such companies benefit from regulatory frameworks that allow for cost recovery and stable returns, leading to highly visible cash flows. This aligns with the "Strongly Suitable" criterion of being a "Regulated... utility... with highly visible cash flows."

**2. Financial Profile and Leverage:**
*   **Equity:** Total Equity is €58.1 billion.
*   **Debt:** Non-current financial liabilities are €44.2 billion, and Current financial liabilities are €25.1 billion, totaling roughly €69.3 billion in financial debt.
*   **Leverage:** The debt-to-equity ratio is approximately 1.2x. While investment grade, utilities often carry higher leverage than industrial firms due to the stability of their cash flows. Hybrid bonds are frequently used by utilities to optimize their capital structure, improve adjusted leverage ratios (such as FFO/Debt), and maintain investment grade ratings (specifically in the BBB to A range) while funding large capital expenditure programs (Construction in Progress is €11.5 billion, indicating ongoing heavy investment).
*   **Existing Hybrids:** The equity statement shows "Instrumentos De Capital Con Caracteristicas De Pasivo Financiero" (Equity instruments with characteristics of financial liabilities) of €576 million (non-current) and €87 million (current). More importantly, the cash flow statement shows interest payments on "Obligaciones Perpetuas Subordinadas" (Perpetual Subordinated Bonds) of €169 million in 2022. This confirms Iberdrola already utilizes hybrid capital and has established access to this market.

**3. Suitability Assessment:**
*   **Strongly Suitable Criteria:**
    *   *Regulated/Utility:* Yes, Iberdrola is a classic regulated utility/infrastructure player.
    *   *Investment Grade:* Yes, its metrics (strong EBITDA, manageable leverage for the sector) support an Investment Grade profile (typically BBB+ to A- for major European utilities).
    *   *Refinancing/Capex Rationale:* Yes, high Construction in Progress (€11.5 billion) indicates a strong need for long-term funding. Hybrids provide permanent capital that supports leverage ratios during heavy capex cycles.
    *   *Market Access:* Yes, the company has existing perpetual bonds and a large market capitalization, indicating high credibility and access to institutional capital.
    *   *Rating Benefit:* For utilities, hybrids are a core part of the capital structure to bridge the gap between equity and senior debt, often providing rating headroom or preventing downgrades during periods of high investment.

*   **Not Suitable/Marginally Suitable Check:**
    *   It is not "Not Suitable" because it is not highly cyclical, distressed, or a commodity pure-play without hedging/regulation. It is not "Strong IG (A or better)" in a way that makes hybrids unnecessary; even strong utilities use hybrids for structural leverage optimization.
    *   It is more than "Marginally Suitable" because hybrid issuance is a standard, recurring funding instrument for large utilities like Iberdrola, not just an opportunistic or temporary measure. The cash flow visibility is high, not moderate.

**Conclusion:**
Iberdrola fits the profile of a regulated utility with highly visible cash flows, significant capital expenditure needs, and an existing track record in the hybrid market. Issuing hybrid bonds allows it to maintain optimal leverage ratios and fund its energy transition investments efficiently. Therefore, it is strongly suitable.

<answer>Strongly Suitable</answer>