Apple has rarely issued press releases trumpeting new acquisitions since the landmark 1997 deal for NeXT that brought Steve Jobs back into the fold, and the company's now-massive size could help it continue its silence even with a rumored $3.2 billion deal for Beats Electronics.
The U.S. Securities and Exchange Commission, the regulatory body that makes the rules for publicly-traded companies, requires the public disclosure of any "significant" acquisition activity by a regulated company. For most companies contemplating a $3.2 billion acquisition, that disclosure would take the guise of a press release and the filing of form 8-K with the SEC.
Apple, however, is not most companies.