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Zymeworks Adopts Limited-Duration Shareholder Rights Plan, Enabling All Shareholders to Realize Full Value of Company | Business Wire
![In 2020, OXY adopted a "poison pill" shareholder rights plan to prevent an acquirer from buying 15% of the company : r/brkb In 2020, OXY adopted a "poison pill" shareholder rights plan to prevent an acquirer from buying 15% of the company : r/brkb](https://preview.redd.it/gxyw97i66zm81.jpg?width=640&crop=smart&auto=webp&s=dbe9ebdc565466fa54093a04e128abb5743c15ae)
In 2020, OXY adopted a "poison pill" shareholder rights plan to prevent an acquirer from buying 15% of the company : r/brkb
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