(Bloomberg) -- A group of pension funds, unions and asset managers in the U.S., the U.K. and Europe has called on Lyft Inc.’s board to remove a proposed dual-class share structure ahead of an IPO pitch to investors, the Financial Times reported on Saturday, citing a letter sent to directors last week.

Lyft should stick with its single class of shares with one vote each when it debuts on the Nasdaq exchange as a switch to a dual-class structure imposes unnecessary risk to potential shareholders, according to the letter. If Lyft’s board fails to address the issue, it should adopt a provision to phase out the extra voting rights in seven years, it said.

The letter was signed by the U.K.’s Local Authority Pension Fund Forum, BNP Paribas Asset Management, pension funds representing public employees in New York, Los Angeles, Chicago and Ohio, the Teamsters union and United Auto Workers retirees, according to the newspaper.

Scott Stringer, the New York City comptroller who oversees the city’s pension funds, told FT that "outsized control among an unaccountable few is an unnecessary risk, and Lyft should go back to the drawing board."

Securities and Exchange Commission Chairman Jay Clayton said earlier this week that getting rid of dual share classes means "you would choke off some very good companies from coming to market."

Lyft declined to comment to FT.

To contact the reporter on this story: Deana Kjuka in Prague at dkjuka@bloomberg.net

To contact the editors responsible for this story: Katerina Petroff at kpetroff@bloomberg.net, Shaji Mathew, James Amott

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