The report comes three months after Kugler mysteriously left from the Fed's Board of Governors without giving a reason. Kugler joined the Fed in September 2023 after being appointed by then-President Joe Biden.

Kugler's resignation came after she requested and was denied a waiver by Chair Jerome Powell on a disclosure form that showed she had impermissible holdings, Fed officials familiar with the matter told CNBC.com.

Another note on the report says, "Consistent with her September 15, 2024, disclosure, certain trading activity was carried out by Dr. Kugler's spouse, without Dr. Kugler's knowledge and she affirms that her spouse did not intend to violate any rules or policies."

Kugler is married to Ignacio Donoso, who is an immigration lawyer.

Kugler's violations were related to purchases of stock in companies including Apple, Southwest Airlines, Caterpillar and Cava Group, the report indicates.

CNBC has reached out to Kugler for comment on the new Ethics disclosure report, which also discloses that Kugler received more than $41,000 worth of "pro bono legal services" from the law firm Arnold & Porter.

In early 2022, the Fed adopted new rules that banned officials from trading in individual stocks and bonds, as well as cryptocurrencies.

That move came after revelations that then-regional Fed presidents Eric Rosengren of Boston and Robert Kaplan of Dallas traded stocks and stock funds shortly before the central bank adopted broad measures to support the U.S. economy during the first weeks of the Covid-19 pandemic.

In 2024, the Fed's inspector general found that Atlanta Fed President Raphael Bostic, who is retiring in February, violated trading rules.