Check out which companies are making headlines before the bell on Friday:
Hewlett-Packard - Chairman Ray Lane resigned, although he will remain as a director. Two other directors have departed, and director Ralph Whitworth will take over as interim chairman. Lane has been under fire for his role in the acquisition of British software company Autonomy, after HP took a multibillion-dollar writedown because of accounting issues.
F5 Networks - F5 has slashed its fiscal second-quarter outlook, with its North American business performing below expectations. The technology provider now sees profit of $1.06 to $1.07 per share, compared to current estimates of $1.23 a share.
Boeing - Boeing may do a certification flight for its grounded 787 jet today, according to reports. The flight would be a key step on getting a revamped battery system approved and returning the 787 to service.
(Read More: See the Day's Top Percentage Winners & Losers)
Chevron - Chevron has completed repairs at its Richmond, Calif., refinery that was damaged in a fire last year. The facility still needs regulatory approval to resume production, which is seen coming by the end of June.
Southwest Airlines - The airline has obtained a new $1 billion revolving credit line, replacing an $800 million line that was set to expire in April 2016.
UnitedHealth Group - UnitedHealth unit Health Plan of Nevada has been found responsible by a jury in a case involving members who contracted hepatitis C. The plaintiffs in the case have been awarded $24 million in compensatory damages, with punitive damages still to be determined.
Walt Disney - Disney is set to begin an undetermined number of layoffs at its consumer products and studio units, according to sources.
Apple - Apple will sign a music streaming deal with Warner and Universal Music within a week, according to a CNET report.
Kimberly-Clark - BMO Capital has downgraded the consumer products maker's stock to "underperform" from "market perform."
Hanesbrands - The clothing maker has initiated a quarterly dividend of $0.20 per share, putting the yield at 1.8 percent at the stock's current price.
WD-40 - The maker of lubricants and cleaning products reported quarterly profit of $0.66 per share for its fiscal second quarter, 10 cents above estimates. It also raised its profit outlook for the year, despite weaker sales in the Americas and higher expenses. WD-40 is seeing improved results in the Europe and Asia-Pacific regions.
Exide Technologies - The battery manufacturer has retained Lazard to review options for maximizing shareholder value. It did not say what specific alternatives it might be considering.
Valero Energy - The energy producer has approved the spin off of its retail business. Shares of subsidiary CST Brands are expected to be distributed to Valero shareholders on May 1.
Rosetta Stone - The maker of language education software is closing its well-known yellow retail kiosk locations, and will cut 245 employees. The move is part of a process in which Rosetta Stone will become an online operation.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
Questions? Comments? Email us at firstname.lastname@example.org