LONDON-- Rolls-Royce Holdings PLC said Wednesday that John Rishton will retire as chief executive and be replaced by former ARM Holdings PLC chief Warren East, following a tumultuous period for the British engine maker, marked by profit warnings, layoffs and the exit of its chief financial officer only a few months ago.

Mr. Rishton, who informed the company chairman Ian Davis late last year of his plans to exit, will depart on July 2 after more than four-year leading the company.

Mr. East, 53-years-old, was CEO of ARM Holdings from 2001 to 2013 and a nonexecutive director at Rolls-Royce. He "has proven strategic and leadership skills in a global business and a strong record of value creation," Mr. Davis said. Investors welcomed the change, sending Rolls-Royce stock up more than 3%.

The change comes after one of Rolls-Royce's big investors, the Seqoia Fund, called Rolls-Royce's performance in 2014 "a horror show." In its annual report, the fund criticized Mr. Rishton for showing "minimal awareness of the returns on capital his acquisitions have generated."

Mr. Davis Wednesday signaled that no big strategy changes were planned, saying the board was "comfortable" with its involvement in making engines for ships and planes and land-based power systems.

Rolls-Royce shares slumped last year after the company said it wouldn't have any profit growth and then revised earnings downward multiple times. The company in November announced plans to slash 2,600 jobs and the replacement of chief financial officer Mark Morris, a 27-year company veteran.

To appease investors, Rolls-Royce last year embarked on a GBP1 billion ($1.5 billion) share repurchase, a first for the company.

Incoming chief executive Mr. East said the near-term focus would be on driving restructuring measures put in place by Mr. Rishton. "You can see the positive effects of the operational transformation," Mr. East said.

One of the issues for the new Rolls-Royce management team will be figuring out how to re-enter the narrowbody aircraft engine market: by far the largest sector of commercial flying. Rolls-Royce was a partner with Pratt & Whitney, the engine unit of United Technologies Corp., before exiting several years ago as it opted not to invest in a new turbine design.

Mr. Davis said he wanted Rolls-Royce to re-enter that sector, though echoed Mr. Rishton's view that doing so wouldn't be done alone because of the scale of the financial commitment and the risk of such a project. "Partnering in some form is a very important part of our approach to get into the narrowbody," he said.

Mr. Rishton's also saw other developments that unnerved investors. The U.K. Serious Fraud Office and U.S. regulators have begun looking into alleged illegal business dealings conducted by Rolls-Royce in Asia. Rolls-Royce has strengthened its anticorruption process but the probe remains open.

The British company also tried to strengthen its maritime engine business through a $10 billion takeover of Finland's Wärtsilä Oyj, which rebuffed Rolls-Royce's preliminary approach. The attempted acquisition of a company of that size surprised investors who hadn't realized expansion was on the management's agenda so soon after its full takeover of Tognum, a German engineering company originally acquired in partnership with Daimler.

The sale of its subscale industrial gas turbine business to Siemens was received better.

The company also sold its subscale industrial gas turbine business to Siemens.

Rolls-Royce said Mr. East will get a base salary of 925,000 pounds ($1.38 million) and a pension allowance of 25% of salary. He will also be eligible to participate in annual performance related bonus scheme up to a maximum of 180% of salary per annum and in the performance share plan up to a maximum of 180% of salary.

Mr. East, who said he has been eager to resume a chief executive role since leaving ARM, would lean on his technology background to bring out more of that focus at Rolls-Royce.

Write to Robert Wall at robert.wall@wsj.com and Ian Walker at ian.walker@wsj.com

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