The 60-year-old model lost her husband to cancer on January 10, after an 18-month battle, reported Entertainment Tonight.
Iman - who has a 15-year-old daughter, Alexandria, with her late husband - has largely kept to herself since her spouse passed away, but has shared a number of inspirational messages on social media.
Just last week, she posted: "Life doesn't get easier or more forgiving. We get stronger and more resilient."
And a few weeks after her husband's death, she simply wrote: "Love & gratitude. Iman (sic)."
More From This Section
The couple's daughter will receive her USD 25 million when she turns 25 while his son Duncan Jones - who he had with his former wife Angie Bowie - will receive his USD 25 million share soon.
A court met last month to approve a guardian for Alexandria, whilst it was also revealed that some of Bowie's long-standing staff will also get a share of his estate.
The estate will now be passed through the probate process.