MORGAN STANLEY: CEO turnover is on the rise and these 7 cloud software companies have the most to lose

Morgan Stanley credits Lawrie with turning DXC around for the better, which is why investors see him as key to the IT service provider's success moving forward.

"He took control of the DXC in 2012 and has since significantly transformed the business," according to the report. "During his tenure, the stock has gone from $9.6 billion in market cap in 2014 to $22.8 billion today. Many investors have a positive view of Mr. Lawrie and ascribe DXC's success to him."

Sherif, who cofounded life sciences data analysis software company Medidata Solutions in 1999, took on the role of CEO in 2001. This long history with the company has given investors confidence in his leadership, though Morgan Stanley believes that Sherif has a strong enough management team around him to carry on if he ever departs.

Still, Sherif is a key asset to the company, according to the report.

"As CEO, Mr. Sherif grew the company from a small startup to a 600-employee company with a $5 billion market cap. In his extensive tenure, Mr. Sherif has also called a majority of decisions made by the company, signifying his importance," it says

Skonnard cofounded the software and IT skills training platform Pluralsight in 2004. Morgan Stanley identifies him as a key person in Pluralsight's ability to acquire strategic assets, which helped grow Pluralsight's business before it went public in May 2018.

"He is key for success of company longer term as he is seen as a visionary of the business to investors," according to the report, which adds that there isn't a clear succession plan if Skonnard leaves.

Winn has been at the helm of the property management software company RealPage for two decades. During that time he "turned it into a $5 billion market cap company," according to the report.

"From early on in his tenure, he has played a key role in overseeing the implementation and innovation of on-demand property management tools and other services such as renters insurance," Morgan Stanley wrote.

RealPage doesn't have a public succession plan, according to Morgan Stanley, but it's believed that management is "thinking about it."

Morgan Stanley thinks Shopify founder and CEO Lutke's mergers and acquisitions prowess and "customer satisfaction philosophy" are vital to the company's success. Shopify makes a simple tool to let customers create their own online stores.

"Shopify was created when Mr. Lutke felt unsatisfied with current ecommerce sites and created his own platform to improve the experience. This different perspective — the increased focus on customer experience and satisfaction — has helped Shopify gain its strong customer base and take market share," Morgan Stanley wrote, adding that there isn't a clear plan if Lutke leaves the company.

Stone founded SS&C in 1986, and "has since been a key visionary for the company," according to the report

SS&C is a financial software holding company, focused on insurance, property management and lending software. Stone has been an important figure in helping the company identify new acquisition opportunities for growth, according to the report.

Despite Stone's value to the company, Morgan Stanley believes the SS&C is "relatively prepared" should he leave the company, and expects that President and COO Rahul Kanwar would take over the reigns.