IBM Internet of Things

IBM is hoping to harness the data collected by smartphones, tablets, connected vehicles and appliances as part of its new Internet of Things business unit. (Joeg Sarbach/Associated Press)

IBM has cut an undisclosed number of jobs in the U.S., part of a "workforce rebalancing" that is designed to shift the focus of the tech giant.

The company has allowed jobs to go unfilled and implemented layoffs earlier this week according to local reports from North Carolina and other IBM units in the U.S.

IBM's strategy is to shift the company toward cloud computing and artificial intelligence operations.

"IBM is aggressively transforming its business to lead in a new era of cognitive and cloud computing," the company said Wednesday in a statement. "This includes remixing skills to meet client requirements."

At the end of 2015, IBM employed 377,757 employees worldwide.

Like many technology companies, it has been "offshoring" work in the past few years, moving jobs to lower-cost countries.

It also has been selling off non-core businesses and buying companies geared toward building its Watson cognitive computing business.

IBM frequently tightens its belt in its first fiscal quarter, reacting to its full-year performance and setting up for the period ahead.

IBM stock is off about 13 per cent in the past year and stockholders, including long-time supporter Warren Buffett, have questioned its potential.