Philanthropist Jane Rivkin, widow of financial strategist Jack Rivkin, the former CEO and chief investment strategist at Altegris Advisors, is listing her Amagansett estate, at 90 Indian Wells Hwy., for $18 million.

The Rivkins often hosted Safe Horizons charity events at their home, which they bought in 2010 for $6.5 million from Tahitian “pearl king” Salvador Assael.

The 6,500-square-foot manse, built in 1909, comes with 7 bedrooms, and 11½ bathrooms.

It sits on 2.3 acres.

Jack Rivkin, who passed away in November, was often interviewed on Bloomberg to discuss then-candidate Donald Trump’s impact on the markets.

Jane Rivkin used to own the Kitchen Classics tabletop shops in Bridgehampton and East Hampton.

The listing broker is Town & Country’s Judi Desiderio.