Danish clean energy company Ørsted A/S (<a href="https://www.nasdaqomxnordic.com/aktier/microsite?Instrument=CSE122544&name=%C3%98rsted&ISIN=DK0060094928" target="_blank">CPH:ORSTED</a>) on Thursday posted a 19% year-on-year decline in first-quarter net profit to DKK 2.6 billion (USD 373m/EUR 349m) due to higher tax expenses.