Check out which companies are making headlines before the bell on Tuesday:
Merck — The drug maker earned 84 cents per share for the second quarter, excluding certain items, one cent above estimates. Merck's earnings were cut in half form a year ago, as it lost market exclusivity for its allergy drug Singulair.
Generac —The generator maker earned 95 cents per share for the second quarter, excluding certain items, well above estimates of 76 cents. Revenue was also well above estimates, although the company warned that it would start to run into tough comparisons to the year-earlier period. Sales soared during hurricane Sandy and other weather disruptions last year.
Coach — The luxury retailer earned 89 cents per share for its fourth quarter, excluding certain items, matching estimates. But North American sales were weaker, and the company also announced the departure of executives Jerry Stritzke and Mike Tucci at the end of August.
Health Management Associates — The operator of not-for-profit hospitals is being bought by Community Health Systems for $7.6 billion in cash and stock. The deal is worth $13.78 per share, below HMA's Monday close of $14.92.
Mosaic, Potash — Both fertilizer producers are seeing their stocks hit hard this morning - following the breakup one of the world's largest potash partnerships. Russia's Uralkali pulled out of a venture with its partner in Belarus, and expects the move will cause global prices to drop by 25 percent.
Pitney Bowes —The office products maker beat estimates by 9 cents with second quarter profit of 43 cents per share, excluding certain items. The company also announced it would sell its North American management services business to funds affiliated with Apollo Global Management.
National Oilwell Varco—The oilfield services equipment maker missed estimates by 9 cents with second quarter profit of $1.24 per share. However, its revenues did beat consensus, and the company did see sequential gains in revenue and profit.
Herbalife – The maker of health and nutritional products posted second quarter profit of $1.41 per share, well above estimates of $1.18. Revenue also exceeded consensus, as did projected current quarter revenue growth. Herbalife also raised its yearly earnings forecast, citing strong demand for its products.
Time Warner Cable – Time Warner Cable pulled CBS stations from its systems in three markets after the two failed to reach agreement in a fee dispute, but then reversed that decision as the two sides agreed to keep talking.
Anadarko Petroleum – Anadarko reported second quarter profit of $1.05 per share, excluding certain items, 14 cents above estimates. Anadarko's bottom line was helped by higher natural gas prices.
Express Scripts – Express Scripts earned $1.12 per share for the second quarter, excluding certain items, beating estimates by two cents. Revenue also beat consensus, with the pharmacy benefits manager noting growth in its specialty pharmaceutical business. Express Scripts also raised its yearly earnings forecast, and announced that its chief financial officer is departing.
Hartford Financial – Hartford missed estimates by five cents in reporting second quarter profit of 66 cents per share, excluding certain items. The insurance company has been in the process of restructuring its operations to focus on core areas like property-casualty insurance and group benefits.
HCA – The hospital operator named Milton Johnson as its next chief executive officer. He'll succeed Richard Bracken, who will retire from that post at year's end. Johnson is currently the company's chief financial officer and has been with HCA for 31 years.
Eastman Chemical — Eastman reported second quarter profit of $1.80 per share, excluding certain items, 16 cents above estimates. The chemical company also raised its full year earnings forecast, as it continues to benefit from its 2012 acquisition of chemical maker Solutia.
Spirit Airlines — Chairman William Franke is selling his investment firm Indigo's stake in the airline. He'll also resign from its board next month.
Lockheed Martin — Lockheed has reportedly reached agreement with the Pentagon on a jet order involving 71 F-35 fighter jets, according to Reuters. The deal would be worth more than seven billion dollars.
U.S. Steel – The steel producer lost 35 cents per share for the second quarter, smaller than the 78 cent loss expected by analysts. Revenue came in below consensus, as U.S. steel and other steel producers contend with weak prices and an overabundance of supply.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
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