UPDATE 1-Market Chatter-Corporate finance press digest
(Adds item on AT&T Inc)
Aug 26 (Reuters) - The following corporate finance-related stories were reported by media:
* Berkshire Hathaway Inc Chairman and CEO Warren Buffett is helping finance Burger King Worldwide Inc's takeover of Canadian chain Tim Hortons Inc, the Wall Street Journal reported, citing people familiar with the matter.
* Chevron Corp has been searching for up to $1.5 billion of equity investment to help develop its Duvernay shale formation assets in Canada and contacted potential investors including private-equity firms, according to people familiar with the matter.
* Amazon.com Inc has agreed to buy live-streaming gaming network Twitch for more than $1 billion, the Wall Street Journal reported, citing two people familiar with the matter.