The sale of shares can have significant implications for the company and its stakeholders, as it can affect the ownership structure and control of the company. It's important to ensure that the sale is done correctly and in compliance with any legal or regulatory requirements.

To effect a change in shareholder of a company through sale, the following steps may be involved:

1. Negotiating the terms of the sale: The seller and buyer will need to negotiate the terms of the sale, including the price and any other conditions or requirements.

2. Drafting and signing a purchase agreement: A purchase agreement should be drafted and signed by both parties to formalize the terms of the sale.

3. Transferring the shares: The seller will need to transfer the shares to the buyer, typically by endorsing the share certificates and registering the transfer with the company's registrar or transfer agent.

4. Updating the company's records: The company's records should be updated to reflect the change in ownership, including updating the shareholder register and notifying any relevant regulatory bodies.

5. Filing any required forms or documents: Depending on the jurisdiction and the type of company, there may be forms or documents that need to be filed with the relevant government agencies or registries to report the change in ownership.

It's important to consult with a lawyer or a business advisor to ensure that all necessary steps are taken and the sale is done correctly.