Catch up on the weekend's top five stories with this list compiled by The Fly: 1. Specialty chemicals company Chemtura (CHMT) agreed to be acquired by Germany's Lanxess for $33.50 per share, representing a total transaction value of about $2.5B. 2. After reports Friday that Twitter (TWTR) is holding informal talks to potentially sell itself to a Salesforce (CRM) or Google (GOOG), new details emerged over the weekend, with the Wall Street Journal confirming the news and Bloomberg revealing that CEO Jack Dorsey, recently brought back on board to help revive growth at the microblog service, isn't so keen on the idea of selling. 3. Gunmaker Smith & Wesson (SWHC) disclosed Friday that its proposal to replace the U.S. Army's sidearm failed to advance to the next stage of selection, sending shares lower in after-hours trading. 4. Sony's (SNE) western remake "The Magnificent Seven" outgunned competitors at the box office, grossing $35M in its opening weekend as Time Warner's (TWX) family-friendly "Storks" took second place. 5. CBS (CBS), Capital One (COF), Spirit Airlines (SAVE), Whole Foods (WFM), and Sarepta (SRPT) saw positive calls in Barron's, and Viacom (VIA) was discussed in the context of a potential remerger with CBS.