By Anna Molin 

STOCKHOLM--Swedish investment giant Industrivärden AB said that Chairman Sverker Martin-Löf--one of the most powerful men in Swedish business--is stepping down early, amid questions over corporate governance.

The company added that it will shuffle a number of senior directors and executives at some of its portfolio companies, including at some of the Nordic's biggest corporate names--from banking giant Svenska Handelsbanken AB to telecoms-equipment maker Ericsson AB and construction giant Skanska AB. The move, disclosed early Thursday, represents one of the biggest shake-ups of corporate Sweden in decades.

The decision follows weeks of media scrutiny into the use by Mr. Martin-Löf and other top managers of corporate jets owned by one of Industrivärden's portfolio firms. It comes just days after Industrivärden Executive Vice President Pär Östberg--responsible for the company's investment operations since 2012 and widely seen as the likely heir to Chief Executive Anders Nyren--stepped down and left his board assignments at Ericsson and Skanska with little explanation. Mr. Östberg wasn't available to comment and hasn't spoken since.

The announcement of Mr. Martin-Löf's departure comes amid broader questions from shareholders over the governing structure at Industrivärden, which together with the Wallenberg-family's Investor AB, controls a large swath of corporate Sweden. Industrivärden was established by Handelsbanken in 1944 as a vehicle to gather and distribute shareholdings that the bank had accumulated in the 1930s in the wake of the global market crash.

Over the years, it moved into managing employee pensions. It then morphed into an active, long-term investor in its own right, managing pensions for private and public entities, along with investments by other long-term investors, including foundations and individuals.

More recently, Industrivärden has been criticized for letting a few key players, such as the 72-year-old Mr. Martin-Löf, hold too much power at the company and across its portfolio companies. He has defended the structure as necessary to maintain influence over the group's holdings, though he has recently said that it could benefit from spreading key posts across more people.

Mr. Martin-Löf had earlier signaled his intention to leave in 2016. But his involvement and handling of a corporate-jet controversy at SCA AB, a hygiene and forest products company in Industrivärden's portfolio, have recently fueled criticism.

The Swedish daily newspaper Svenska Dagbladet last year reported that SCA has been using the company's private jets to transport top managers on trips to hunting lodges in northern Sweden, the Olympic Games in London and to a soccer championship in Kiev--sometimes with wives, children, grandchildren and even dogs in tow.

Mr. Martin-Löf has maintained that the trips were business related or in keeping with global industry norms. But the allegations sparked particularly strong controversy in Sweden, amid the country's long-cherished ideals of egalitarianism.

In addition to his chairmanship at Industrivarden, Mr. Martin-Löf will give up his roles as chairman of both SCA and steelmaker SSAB AB. He is also vice chairman of Handelsbanken and Ericsson, and a board member at Skanska. His departure from Industrivärden and all other board assignments will be effective from the companies' annual general meetings in the spring.

Industrivärden said that in future, senior executives of portfolio companies won't serve on its board, and only to a limited extent on the boards of other portfolio companies. Industrivärden said that it will make a number of recommendations to the nominating committees for the companies affected.

Mr. Nyren will be asked to take over as chairman. Fredrik Lundberg, chief executive of key Industrivärden shareholder, L E Lundbergföretagen, will be proposed as vice chairman. A recruitment process for a new chief executive of the investment company is under way, Industrivärden said.

Mr. Nyren will also be asked to step down as chairman of Handelsbanken, and the bank's Chief Executive Pär Boman will be proposed as the new chairman. Industrivärden said that it will recommend an announcement on a successor to Mr. Boman be made before the bank's annual general meeting in March.

Mr. Boman will also be recommended as new chairman of SCA and as a new board director of Skanska. Bengt Kjell, formerly vice president of Industrivärden, will be recommended as new chairman of SSAB, and Mr. Nyren will be proposed as a board member of Ericsson.

Write to Anna Molin at anna.molin@wsj.com

Access Investor Kit for LM Ericsson Telefon AB

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=SE0000108656

Access Investor Kit for Skanska AB

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=SE0000113250

Access Investor Kit for LM Ericsson Telefon AB

Visit http://www.companyspotlight.com/partner?cp_code=P479&isin=US2948216088

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Ericsson (NASDAQ:ERIC)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Ericsson Charts.
Ericsson (NASDAQ:ERIC)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Ericsson Charts.