I need to assess whether Acciona SA is suitable to issue hybrid bonds based on the provided financial data. Hybrid bonds are typically evaluated based on several key criteria: financial stability, profitability, cash flow generation, leverage, and creditworthiness.

Let me analyze the key metrics:

**1. Financial Position & Scale**
- Total Assets: €22.6 billion (2023) vs €19.6 billion (2022) - growing
- Equity: €6.3 billion (2023) vs €5.6 billion (2022) - strong equity base
- Revenue: €11.2 billion (2022) vs €8.1 billion (2021) - significant revenue growth of 38%

**2. Profitability**
- Profit attributable to owners: €441 million (2022) vs €332 million (2021) - improving profitability
- Basic EPS: €8.06/share (2022) vs €6.08/share (2021) - strong EPS growth
- Profit from operating activities: €1,334 million (2022) vs €829 million (2021) - strong operating performance

**3. Cash Flow Generation**
- Operating cash flow: €1,648 million (2022) vs €574 million (2021) - very strong improvement
- Investing cash flow: -€1,944 million (2022) - heavy capex spending
- Financing cash flow: €338 million (2022) - positive financing inflow

**4. Leverage & Debt Position**
- Non-current liabilities: €8.5 billion (2023) vs €7.1 billion (2022)
- Current liabilities: €7.8 billion (2023) vs €6.9 billion (2022)
- Total liabilities: €16.3 billion vs equity of €6.3 billion
- Debt-to-equity ratio: roughly 2.6:1 (total liabilities to equity)

**5. Key Concerns for Hybrid Bond Issuance**
- Heavy capital expenditure: €2,195 million purchase of PPE and intangibles in 2022
- Significant financing costs: €256 million
- The company is investing heavily (negative investing cash flows)
- Debt levels are substantial and growing

**6. Positive Factors**
- Strong revenue growth (38%)
- Improved operating cash flow (nearly 3x increase)
- Profitable operations with growing margins
- Large, established company (S.A. in Spain)
- Strong equity base with non-controlling interests

**Assessment:**
Hybrid bonds are typically issued by companies with:
- Investment grade or near-investment grade characteristics
- Stable cash flows
- Ability to service debt
- Need for regulatory capital or long-term financing

Acciona shows:
- Strong operating performance and cash flow generation
- Significant growth trajectory
- However, high leverage and heavy capex needs
- The company appears to be in a growth/investment phase with substantial infrastructure investments

The company has the scale, profitability, and cash flow generation capability to service hybrid bonds. The strong operating cash flow improvement (€1.6B) relative to financing costs suggests debt service capacity. However, the high leverage and capital-intensive nature create some risk.

Given the strong revenue growth, improved profitability, substantial operating cash flows, and large asset base, but considering the elevated leverage and capital intensity, this company appears **Marginally Suitable** for hybrid bond issuance. It has the cash flow to service hybrids, but the high leverage and investment intensity create some concern about financial flexibility.

<answer>Marginally Suitable</answer>