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4 Big Tech giants have plowed over $1 trillion into stock buybacks in 10 years — more than Tesla or Meta's entire market value
(markets.businessinsider.com)
This is a most excellent place for technology news and articles.
It's the same thing.
It's not because they announce it way ahead of time. Manipulation would be Apple buying a bunch of stock right before they announce the new iPhone, then selling after the announcement. That's very illegal.
Giving money to existing shareholders is completely legal (as long as you give it equally per share) because it's the shareholders' money. They own the company.
Your example would be manipulating for the company. Stock buybacks primarily manipulate for the execs and large shareholders. Even though they have reporting requirements, they benefit from the general increases in price.
If the company wants to give money to shareholders, they could do that in the form of dividends.
No one is being manipulated. The company is handing the stockholders their own profits. Dividends are the same thing, just taxed differently.