Yahoo Inc.

The three year effort to integrate the IT systems of American Airlines and the former US Airways reaches another milestone this weekend as American shifts the planes and pilots to a single operating system. They will use American's massive flight operating system, which runs 500 applications.

Private equity investors seem concerned about the impact on their reputations of regulatory action, and that concern extends to their limited partners.

Deploying an automatic password reset in the wake of a cyberattack, a move Yahoo has so far avoided, may wind up locking users out of their email accounts, online security experts say.

An information-security firm says the hackers who stole at least 500 million records from Yahoo are criminals who are selling access to the database, and not a state-sponsored group as Yahoo contends.

Six Democratic U.S. senators have written to Yahoo CEO Marissa Mayer, seeking answers to questions about the company’s 500 million-account data breach, thought to be the largest ever.

More U.S. businesses are bolstering efforts to retain top executives of acquired concerns because unwanted exits can doom a takeover.

The intrusion was launched from computers in Russia and sought data on 30 to 40 targeted users of the company’s online services who did business in Russia, a person familiar with the matter said.

Investors started worrying that a massive security breach disclosed by Yahoo Inc. could impact the internet company’s $4.8 billion deal to sell its core business to Verizon Communications Inc.

Yahoo’s revelation of a massive security breach might have reminded you of an old account or two you haven’t logged into for years. Here are some tips and links to help reduce your overall exposure.

The debate around executive pay clawbacks was reignited earlier this week when lawmakers questioned Wells Fargo’s CEO over the bank’s sales practices, just as the SEC received a further nod from U.S. courts to stay its course on the issue.

Yahoo disclosed a security breach by a “state-sponsored actor” affecting at least 500 million users, potentially the largest such breach on record and the latest hurdle for the company as it works through the sale of its core business.