Fortum shows significant equity losses in 2022 with large negative Profit/Loss and substantial Discontinued operations impact, leading to a weakened equity base and substantial liabilities. However, it still has positive equity attributable to owners of parent in 2023 (7670000000 EUR) and substantial cash flows from financing activities including net borrowing, but also large cash outflows from financing continuing operations (-4686 million) and significant dividends. The balance sheet indicates a high level of noncurrent liabilities and large negative reserves from translation and other comprehensive income, plus sizeable noncurrent derivative liabilities. For hybrids, typical requirements include durable equity credit strength and stable earnings to absorb coupon payments without impairing equity. The 2022 period shows volatile earnings and large discontinued-operation losses, but 2023 year-end equity improves modestly. Given data, this is not clearly strong; risk due to earnings volatility and large negative comprehensive income components. Thus, likely Marginally Suitable. Final: Marginally Suitable. 
<answer>Marginally Suitable</answer>