Less than half of the projects undertaken by the Clinton Global Initiative have been completed, according to a list posted Monday.

Amid controversy over the nature of the Clinton Foundation's work, Hillary Clinton has continued to defend the charitable offshoot from allegations that it served as a vehicle to further her family's political ambitions by pointing to the often ill-defined works of the Clinton Global Initiative and its related organizations.

The Clinton Global Initiative, which is holding its glitzy annual meeting in Atlanta this week, operates by convening powerful CEOs and nonprofit heads and encouraging them to pledge to philanthropic projects called "commitments."

But the report showed fewer than half of those commitments have been completed since 2005, with roughly a third underway and more than 200 others "stalled" or "unfulfilled."

The charity said in its report that several organizations pulled out of their commitments around the time of the financial crisis, when funding for some companies suddenly became tight.

According to the report, the Clinton Global Initiative received an all-time low number of commitments in 2015, the year Hillary Clinton launched her presidential campaign and drew a deluge of negative attention to the Clinton Foundation's work.

The philanthropy did not list all the organizations that pledged money for projects that never became reality.

Hillary Clinton has struggled to answer questions on the campaign trail about why many donors to the Clinton Foundation received favorable treatment from the State Department while she served as secretary of state.