The stock purchases by the insiders are at companies developing treatments for breast cancer and schizophrenia.
That's Rule No. 5 of his '5 Rules for Trimming Your Winning Positions.'
Shares of Pfizer rise Thursday after the drugmaker is named a 'top pick' at Credit Suisse following a meeting the analysts had with Pfizer's management team.
Colfax strikes a deal to sell its air and gas handling division to private-equity firm KPS Capital Partners for approximately $1.8 billion.
Shares of ImmunoGen plunge after the U.S. Food and Drug Administration requests additional trials to 'evaluate the safety and efficacy' of one of its cancer-fighting treatments.
Shares of Puma Biotechnology plunge after the company reveals that more patients than expected have discontinued treatment with its breast cancer drug, Nerlynx, prompting several analyst downgrades.
Novartis gets a potentially blockbuster eye drug and Takeda gets to unload some debt and employees it took on when it purchased Shire.
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