The continuing turmoil at Uber Technologies Inc. has caused several investors to mark down their valuations of the company by as much as 15 percent, the Wall Street Journal reports, citing the third-quarter filings of four mutual funds that own shares in it.

The beleaguered ride-hailing company’s attempts to restore order to a company culture marred by scandal and ongoing infighting, all while it continues to search for a leader to replace co-founder and former CEO Travis Kalanick, has taken a toll…