Refer to the input text as context and select the correct relationship between 'Duracell' and 'Berkshire Hathaway' from the available options.
Options: brand, currency, position held, owned by

-- U.S. company Berkshire Hathaway (Sao Paolo: BERK34.SA - news ) to acquire U.S. personal care and cosmetics company Procter & Gamble's Duracell battery unit (notified June 23/deadline July 29)
owned by