I need to assess whether TenneT Holding B.V. is suitable to issue hybrid bonds based on its financial data.

Let me analyze the key factors for hybrid bond issuance suitability:

**1. Financial Performance & Profitability:**
- Revenue grew significantly from €5,524M (2021-2022) to €8,299M (2022-2023) - a 50% increase
- However, the company is reporting losses: -€879M net loss in 2022-2023 and -€340M in 2021-2022
- Operating losses are worsening: -€976M in 2022-2023 vs -€275M in 2021-2022
- Negative earnings per share: -€4,835 per share

**2. Balance Sheet Strength:**
- Total assets grew from €31,200M to €38,509M
- Equity is substantial at €7,713M (2023) vs €7,424M (2022)
- However, equity ratio is only about 20% (€7,713M/€38,509M)
- Long-term borrowings increased significantly from €12,366M to €19,006M
- Total non-current liabilities jumped from €15,012M to €21,748M

**3. Cash Flow Position:**
- Operating cash flow is positive: €1,196M in 2022-2023 (though this includes working capital movements)
- Cash flows from operations excluding EEG working capital was only €596M
- Heavy capital expenditure: €4,424M purchase of PPE
- Investing cash flow is deeply negative: -€4,345M
- Financing activities provided €6,556M, indicating reliance on external funding

**4. Existing Hybrid Capital:**
- Already has €2,125M in hybrid capital outstanding (unchanged)
- Pays €57M annually in dividends to hybrid capital owners
- This suggests they already have experience with hybrid instruments

**5. Key Concerns:**
- Persistent operating losses and negative net income
- Very high leverage with significant debt increase
- Negative free cash flow (operating cash flow minus capex)
- The company is a regulated transmission system operator with stable revenue base but high capital intensity

**6. Positive Factors:**
- Essential infrastructure/utility nature (transmission system operator)
- Government backing (Dutch State is parent)
- Strong revenue growth
- Ability to raise capital (proceeds from borrowings: €7,338M)
- Regulated asset base provides stable cash flows

**Assessment:**
Hybrid bonds are typically suited for companies with:
- Stable cash flows (✓ - regulated utility)
- Investment grade credit quality (debatable - high leverage but government backing)
- Ability to absorb coupon deferrals (✗ - already loss-making)
- Need for equity-like capital without dilution

The company has several concerning features: persistent losses, high leverage, negative free cash flow. However, as a state-backed regulated utility with essential infrastructure status, it has implicit government support. The fact they already have hybrid capital suggests market acceptance.

The losses are problematic for hybrid suitability - hybrid bonds require ability to defer coupons without triggering distress, but the company is already in financial stress with operating losses. The high capex program and reliance on external funding suggest ongoing capital needs.

Given the government ownership and regulated utility status, there's implicit support, but the standalone financial metrics are weak. This makes it marginally suitable - the hybrid bonds would likely rely heavily on the government backing and regulated nature rather than standalone financial strength.

<answer>Marginally Suitable</answer>