NEW YORK — RadioShack Corp. said Tuesday that it plans to close up to 1,100 stores, or about a fifth of its US locations. The news came as the retailer reported a wider quarterly loss after a disappointing holiday season. Its stock tumbled 17.3 percent.
Chief executive Joseph Magnacca said the closings would leave the company with more than 4,000 US stores. That’s still far more than at Best Buy, which has roughly 1,400 US locations.
RadioShack did not immediately identify the stores that will close or say how many jobs would be affected. A call to the company, based in Fort Worth, was not returned.
The closings are just the latest setback for RadioShack, which is fighting to update its image and compete with the rise of online and discount retailers.
Long known as a destination for batteries and obscure electronic parts, RadioShack has sought to remake itself as a specialist in wireless devices and accessories. But growth in the wireless business is slowing, as more people have smartphones and see fewer reasons to upgrade.
In addition to slashing costs and shuffling its management, RadioShack has been renovating its stores with a more modern look.
‘‘Since I joined the company, it has been clear we need to change the conversation about RadioShack,’’ Magnacca said during a call with analysts.
He pointed to the success of the company’s Super Bowl ad as an example of ‘‘exactly the kind of disruption we needed.’’
The spot got glowing reviews for poking fun at the company’s outdated image by showing characters from the 1980s, including Alf, Chucky and Teen Wolf, ransacking a store.
Magnacca also outlined various efforts the company is taking, such as revamping its product mix and working to identify trends in electronics earlier.
Still, he conceded that the turnaround push is taking longer than expected because the company was ‘‘weak’’ in many areas and ‘‘just broken’’ in others. The latest quarter’s performance was hurt by a slowdown in customer traffic and increased promotional activity.
Sales at stores open at least a year — a key indicator of a retailer’s health — sank about 19 percent.
The company said that the stores targeted to be closed are being selected based on location, the area’s demographics, lease duration, and financial performance.
For the three months that ended Dec. 31, RadioShack lost $191.4 million, or $1.90 per share. That compared with a loss of $63.3 million, or 63 cents per share, a year earlier. Excluding certain items, the company lost $1.29 per share.
Analysts surveyed by FactSet had expected a loss of 16 cents per share.
Revenue declined to $935.4 million from $1.17 billion. Wall Street was looking for revenue of $1.12 billion.
RadioShack reported a full-year loss of $400.2 million, or $3.97 per share.
In the prior year it lost $139.4 million, or $1.39 per share. Its adjusted loss was $3.04 per share.
Annual revenue declined 10 percent to $3.43 billion from $3.83 billion.
Shares of RadioShack fell 47 cents Tuesday, or 17.3 percent, to $2.25. The stock is down about 22 percent in the past year.