The most recent Quixote Foundation IRS Forms 990PF are available for viewing or download here.
Private foundations are required to file a Form 990PF with the IRS for each tax year, and to make those forms available to the public. These forms provide detailed financial and grantmaking information. Each new year will be added as soon as the information is available--if it's not here, it's not complete yet.
Happy reading... you might need some strong coffee!