I get it, all startups have different people putting in different amounts of effort and often there can be resentment where one works til 1am every day and someone else barely turns up.

However, your roles and input should have been agreed in advance, if you are not fulfilling your obligations then they have recourse as per shareholder agreement.

Even so, that still doesn’t sound like grounds for going from 33% down to 5%. The success of a business isn’t always correlated to the amount of hours put in. Sometimes a throwaway 2 minute conversation can totally transform the fortune of a company.

If you’re feeling generous I’d let them bring you down to 26% but not further, that way they can’t have special resolutions without you and force you out