Utilize the input text as a context reference, choose the right relationship between 'Berkshire Hathaway' and 'Business Wire' from the options.
Options: manufacturer, subsidiary, brand, employer

Business Wire is a unit of Warren Buffett's Berkshire Hathaway Inc, and PR Newswire is a unit of Britain's UBM Plc (LSE: UBM.L - news ) .
subsidiary