FRAMINGHAM (AP) -- Staples' fiscal fourth-quarter net income dropped 72 percent, dragged down by charges related to store closings and other matters. Its adjusted results topped Wall Street's view, but its forecast for this year was below analysts' estimates.

Its shares dropped 5 percent in premarket trading.

The office-products company also announced Wednesday that it is increasing its quarterly dividend by 9 percent.

Staples Inc. has launched a strategic plan that includes investing more in its online and mobile efforts and expanding the product assortment that it offers to its business customers. The efforts are aimed at serving customers' better and accelerating growth.

For the period ended Feb. 2, the chain earned $78.1 million, or 12 cents per share. That's down from $283.6 million (41 cents per share) a year earlier.

Excluding charges tied to stores closings and other items, earnings from continuing operations came to 46 cents per share. Analysts expected 45 cents per share, according to a FactSet survey.

Revenue rose 3 percent to $6.57 billion from $6.37 billion, helped by an extra week in the period. Taking out the sales during the extra week, revenue fell 4 percent from a year ago.

Wall Street forecast $6.71 billion in revenue.

Staples lost $210.7 million, or 31 cents per share, for the full year. In the prior year it earned $984.7 million ($1.40 per share). Annual revenue edged down 1 percent to $24.38 billion from $24.66 billion.

The Framingham company anticipates 2013 earnings between $1.30 and $1.35 per share. Revenue is expected to rise by a low single-digit percentage rate compared with 2012's consolidated sales of $23.92 billion. Analysts expect $1.44 per share on $24.33 billion in revenue.

Staples has stores at Stadium Plaza in Tewksbury, the Chelmsford Mall, as well as in Bedford, Burlington, Acton and Nashua.

Shares of Staples were trading at $12.40, down 89 cents, in Nasdaq action as of 10:30 a.m.