Check out which companies are making headlines before the bell on Monday:
Dick's Sporting Goods - Barclays has initiated coverage of the sporting goods retailer's stock with an "overweight rating," saying Dick's has "distinguished itself as a consolidator" in a largely mature market.
Abercrombie & Fitch - The clothing retailer's shares have been upgraded to "outperform" from "neutral" at Macquarie, pointing to various strategies that it believes will expand Abercrombie's profit margins over time.
(Read More: See the Day's Top Percentage Winners & Losers)
Las Vegas Sands - PriceWaterhouseCoopers resigned as the casino operator's auditor. The company has no disagreements on its financials for 2011, 2012, and the year-to-date for 2013, but said the relationship "has run its course."
JPMorgan Chase - The bank has lost co-chief operating officer, Frank Bisignano, to First Data, where he will become chief executive officer. Matt Zames will become JPMorgan's sole chief operating officer.
TripAdvisor - Barry Diller resigned as a member of its board of directors, effective immediately. However, Diller will act as a special advisor to the company's chief executive officer.
Conceptus - Conceptus will be bought by Germany's Bayer for $1.1 billion, or $31 per share in cash, a 19.7 percent premium over the stock's closing price Friday. Conceptus is a maker of contraceptive devices.
Valeant Pharmaceuticals, Actavis - The two have put a proposed merger on hold, according to Reuters. Valeant was reportedly seeking to buy Actavis for more than $13 billion, but the talks are said to have broken down over proposed terms of the deal.
Boeing - Dreamliner commercial service is back, with Ethiopian Airlines becoming the first to put the 787 back in the air since its grounding earlier this year.
SunTrust Banks - FBR Capital has upgraded the stock to "outperform" from "market perform," citing lower operating expenses and declining credit costs, among other factors.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
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