Jemima Goldsmith is reported to have bought Kiddington Hall, near Woodstock, for £15m.
The stately home has nine bedrooms, five reception rooms, an orangery, tennis court and 466 acres of surrounding landscaped parkland.
Miss Goldsmith is the daughter of financier Sir James Goldsmith and former wife of ex-Pakistani cricketer and now politician, Imran Khan.
The remaining 1,600 acres of land, which includes five farms and the village of Kiddington, is reported to have been bought by Alec Reed, founder of Reed recruitment group, according to The Sunday Times.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here