International Business Machines Corp. is “well on track” to achieving its 2015 growth targets, Chief Executive Officer Virginia “Ginni” Rometty said in her first annual letter to shareholders.

The world’s largest computer-services provider aims to generate “at least” $20 a share in operating earnings by 2015, Rometty reiterated in the 2011 annual report published this weekend. She became the first female CEO in the company’s 100-year history in January.

Rometty succeeded Sam Palmisano, inheriting a five-year plan that includes boosting software to half of IBM’s earnings, with a focus on programs that help businesses analyze and project trends, as well as on cloud computing and emerging growth markets. Palmisano remains as chairman.

“Our investors benefit from a business model that is both sustainable over the long term and fueled by some of the world’s most attractive high-growth markets and technologies,” Rometty wrote. “Our strong strategic positioning, solid balance sheet, recurring revenue, robust profit streams and unmatched global reach give us confidence that we will achieve success in the next five years.”

IBM rose less than 1 percent, to $200.62, in New York trading on March 9. Last week, the shares closed above $200 for the first time, factoring in stock splits.