Mayor Zohran Mamdani has attracted more than a dozen executives to join his fledgling business advisory council, despite widespread fears among many Wall Street leaders that the mayor’s democratic socialist views will harm New York City’s economy.

The list of 15 Wall Street, real estate and health care executives includes Scott Rechler, who runs the real estate behemoth RXR; Hamdi Ulukaya, the billionaire chief executive of Chobani; Kevin Ryan, a prominent New York tech investor; and Priscilla Sims Brown, the chief executive of Amalgamated Bank.

The Mamdani administration is expected to formally announce the appointments as early as Thursday. When The New York Times sought comment on the impending announcement, City Hall officials shared the full roster with The Times.

The council does not include any executives from some of New York’s largest employers in finance, including JPMorgan Chase, Citigroup, American Express and BlackRock, or from big technology firms, including Meta and Alphabet. But the health care industry, a significant source of job growth in the city, is heavily represented.

The group also includes several executives who have retired from more prominent roles on Wall Street, including Robert Wolf, the former chief executive of UBS Americas; Antonio Weiss, a former head of global investment banking at Lazard; and Tony James, the billionaire former president and chief operating officer of Blackstone.

The creation of the council, whose stated purpose is to advise the mayor on how to invigorate the city’s economy at a time of lackluster job growth and budgetary constraint, comes as the mayor and Wall Street continue to struggle to establish a functional relationship.

The mayor has won some business-class support by retaining Jessica Tisch, the technocratic billionaire heiress, as police commissioner. But others in the business community remain unpersuaded, citing his languid approach to naming an economic development chief (his final choice was one embraced by business leaders) and his anti-Israel rhetoric.

Mr. Mamdani is also the first mayor in this century to not have a deputy mayor for economic development.

The mayor’s office also reached out to Jose Tavarez, the president for New York City at Bank of America; Ken Chenault, the former chief executive of American Express; and Charles Phillips, a private equity executive, about joining the council, though none ultimately joined.

A spokeswoman for Bank of America declined to comment. Mr. Chenault and Mr. Phillips did not respond to requests for comment.

A spokesman for the mayor said he could not discuss specific conversations with candidates, but said that some executives were unable to manage the council’s time commitments, while others did not receive clearance from their companies or were concerned about the level of media attention focused on the council.

“The doors of City Hall are always open to New York’s business leaders, and I look forward to welcoming their experience and strategic guidance as we build a stronger, more dynamic economy,” Mr. Mamdani said in a statement provided by City Hall.

“This council brings together the people building the next generation of New York’s economy — in finance, tech, life sciences and beyond — to help us double down on what makes this city the best place on Earth to start a company, grow a business and build a career,” Mr. Mamdani continued.

On Wall Street, news that Mr. Mamdani was creating the council — which was first revealed in May — has set off a fierce debate about whether executives should work with the mayor or resist him.

Joining the council would give them a voice on policies that might directly affect their businesses and the city’s economy, but several executives said they also feared the move would be viewed as tacit support for policies they opposed.

“The biggest challenges we face cannot be solved by business or government alone,” Mr. Ulukaya said in a statement.

Other members of the mayor’s council include Brandon Blackwood, the fashion designer who rose to prominence with his “End Systemic Racism” purse; Rafael Cestero, a Bloomberg administration alumnus who now runs a housing investment company; Keia Clarke, the chief executive of the New York Liberty; John D’Angelo, the chief executive of Northwell Health; Kruti Patel Goyal, the chief executive of Etsy; Marcus Samuelsson, the renowned restaurateur; Doug Steiner, the chairman of Steiner Studios; and Pat Wang, the chief executive of Healthfirst.

In a recent interview, Mr. Rechler, the RXR executive, argued that while he had concerns that Mr. Mamdani’s anti-Israel rhetoric might be contributing to rising antisemitism — concerns he had shared with the mayor directly — he had had several constructive dealings with the administration and believed in the importance of engaging with those with other opinions.

“I’ll work with any leader for the good of our city or our state, and I’m not going to necessarily agree with all of their positions,” he said.

The council is expected to meet with the mayor quarterly, with its first gathering anticipated for the fall.

Julie Su, the deputy mayor for economic justice who has been spearheading this effort, said that the administration was looking “forward to working with the leaders who make the hiring and investment decisions that will define New York’s economy for the next decade.”