Four top Yale New Haven Health executives are out as the state’s largest health system continues to reorganize its C-suite.

The four executives include two from Yale New Haven Health and two from Greenwich Hospital, a YNHH spokesman confirmed Friday.

No longer with the organizations are YNHH Executive Vice President and Chief Financial Officer Gail Kosyla, who had served in the role for just under two years, and Bill Aseltyne, senior vice president and general counsel, who has been with YNHH for 19 years.

From Greenwich Hospital, Mark Kosak, executive vice president and chief operating officer, and Bill Degnan, chief financial officer, are also leaving their positions.

Robert Hutchinson, a spokesman for Yale New Haven Health, said he could confirm that “we made executive transitions as part of our ongoing efforts to transform our Health System to meet the demands of our current healthcare landscape.”

He added that YNHHS thanks “these individuals for their dedicated service over the years.”

Hutchinson said the health system will identify new leaders to fill the system CFO and general counsel roles “in the coming months.”

In Greenwich, he said, “the new executive leadership structure is in alignment with other YNHHS hospitals and our system-wide structure.”

A spokesperson for Greenwich Hospital declined to comment further.

According to YNHH’s 990 tax form for 2024, Aseltyne was paid a salary of $1.2 million plus about $193,000 in other compensation, while Kosyla was paid $1.14 million plus about $408,00 in other compensation.

Compensation figures for the other two executives were not available.

In a letter sent to staff on Thursday that was shared on Facebook, YNHH CEO Christopher O’Connor said, “This continues to be a period of transformation for our Health System. Your ongoing dedication and leadership are instrumental as we continue to build a strong and innovative Health System that will serve the needs of our patients now and in the future.”

YNHH announced in March it was restructuring its operations, including eliminating an unspecified number of positions. That same month, it offered voluntary retirement packages to certain senior employees, stating the effort was necessary to navigate “a rapidly changing healthcare landscape.”

YNHHS has not said how many employees accepted the buyouts.

Yale New Haven Health — which includes Bridgeport Hospital, Greenwich Hospital, Lawrence + Memorial Hospital and Yale-New Haven Hospital and related entities — reported an operating loss of $162 million in fiscal year 2023, according to audited financial statements. That was an improvement from the previous fiscal year, when YNHH reported an operating loss of $234 million.

In fiscal year 2024, according to audited financial statements, YNNH improved its financials, reporting an operating surplus of $46.2 million.