Dividend tax for DRIP

In a previous employment I received shares as a bonus. These are shares in a US company and the dividends are paid via a dividend reinvestment plan (DRIP). They are automatically reinvested for me after US withholding tax has been paid. The value of these has not previously exceeded the dividend allowance. However for 2024/2025 the value may exceed the £500 allowance depending on how the shares perform. Do I need to report this to HMRC at the end of the tax year and pay dividend tax, even though the dividends are automatically reinvested?

Hi
As they are automatically reinvested by the company, no.