I need to assess whether Bouygues is suitable to issue hybrid bonds based on the financial data provided. Hybrid bonds are typically subordinated debt instruments with equity-like features, often used by companies with strong credit profiles to optimize their capital structure.

Let me analyze key financial metrics:

**Balance Sheet Strength:**
- Total Assets: €60.6B (2023) vs €44.6B (2022) - significant growth
- Equity: €13.9B (2023) vs €12.8B (2022) - equity base growing
- Equity ratio: 23% (2023), 28.7% (2022) - moderate equity ratio, declined due to asset growth
- Goodwill increased significantly: €12.6B (2023) vs €7.4B (2022) - suggests major acquisitions

**Leverage and Debt:**
- Net Debt: €7.4B (2023) vs €0.9B (2022) - massive increase in net debt
- Long-term borrowings: €11.6B (2023) vs €5.8B (2022) - doubled
- Total non-current liabilities: €16.7B (2023) vs €9.7B (2022)
- Current liabilities: €29.9B (2023) vs €22.1B (2022)

**Profitability:**
- Revenue: €44.3B (2022) vs €37.6B (2021) - strong growth
- Operating profit: €1.87B (2022) vs €1.73B (2021)
- Net profit: €1.13B (2022) vs €1.31B (2021) - declining profitability
- Profit margin: ~2.5% - relatively thin

**Cash Flow:**
- Operating cash flow: €2.98B (2022) vs €3.58B (2021) - declining
- Investing cash flow: -€8.6B (2022) - very large outflow due to acquisitions
- Financing cash flow: +€4.85B (2022) - raising debt to fund investments
- Free cash flow is negative due to heavy investment

**Key Concerns for Hybrid Bond Issuance:**

1. **Rapidly increasing leverage**: Net debt jumped from €0.9B to €7.4B - a 7x increase
2. **Major acquisitions**: Goodwill nearly doubled, cash outflow for subsidiaries of €6.3B
3. **Declining profitability**: Net profit down despite revenue growth
4. **Thin margins**: Operating margin ~4.2%, net margin ~2.5%
5. **Negative free cash flow**: Operating cash flow doesn't cover heavy investment spending

**Positive Factors:**
- Large, established company (Bouygues is a major French conglomerate)
- Diversified business (construction, media, telecom)
- Still profitable with €1.13B net income
- Strong revenue growth
- Reasonable equity base

**Hybrid Bond Considerations:**
Hybrid bonds are typically issued by investment-grade companies with:
- Strong, stable cash flows
- Diversified revenue streams
- Ability to absorb higher leverage due to subordination
- Need for equity-like capital without diluting shareholders

Bouygues shows characteristics of a company actively investing/growing through acquisitions, which has strained its balance sheet. The dramatic increase in net debt and goodwill, combined with declining operating cash flow and thin margins, suggests the company is becoming more leveraged. However, Bouygues remains a major conglomerate with diversified operations and is still profitable.

The company appears to be in a transitional/acquisitive phase rather than a stable, deleveraging phase. Hybrid bonds would add subordinated debt, which could be appropriate if the company is investment-grade and needs to diversify funding sources. However, the rapid deterioration in net debt position and negative free cash flow raises concerns.

Given the significant increase in leverage, declining profitability trends, and thin margins, but considering the company's size, diversification, and still-positive profitability, this appears to be a borderline case. The data shows enough scale and diversification to potentially support hybrid issuance, but the rapid leverage increase and cash flow pressures create meaningful risk.

<answer>Marginally Suitable</answer>