Check out which companies are making headlines before the bell Monday:
Citigroup - The bank reported earnings excluding items of $1.30 a share on revenue of $20.1 billion, beating estimates of $1.14 a share on $19.36 billion in sales.
Visa - Robert W. Baird upgraded the card-transaction processor to outperform from neutral.
Microsoft - Deutsche Bank downgraded its the software company to hold from buy.
Johnson & Johnson - Jefferies downgraded the pharmaceutical company to hold from buy.
Eli Lilly - Jefferies upgraded its shares to hold from underperform.
Lexicon Pharmaceuticals - The company said its experimental diabetes treatment hit the key goal in a clinical test.
Edwards Lifesciences - The company won a court order curbing sales of Medtronic's CoreValve system after a prior ruling that the device infringed on patents held by Edwards.
—By CNBC's Kate Gibson.
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