I looked further, I guess not, but then they don't have to disclose.

Peanut oil was tested as an adjuvant in a clinical trial for a flu vaccine developed by Merck in the 1960s, known as "Adjuvant 65". This formulation was never approved for public use in the United States or any other country, and it was not licensed for general use. Although the 1964 New York Times article reported on the patent for this peanut-oil based adjuvant, it explicitly stated the vaccine was still under study and not yet licensed for general use. No peanut oil-based adjuvants have been approved for use in human vaccines in the U.S. or elsewhere. While some sources mention that peanut oil was used in early clinical trials, it is not an ingredient in any currently approved or licensed vaccines. The FDA does not require manufacturers to disclose all ingredients, and some components may be considered trade secrets, but there is no evidence that peanut oil is present in any vaccine currently available. Therefore, while peanut oil was briefly tested in a clinical trial, it has never been used in a licensed vaccine for public use.