[2] Thor Equities owns property in the United States, Canada, Europe, Russia, India and Latin America, including London's historic Burlington Arcade and the Palmer House Hilton.

Thor also has investments in major U.S. cities including San Francisco's Union Square; Georgetown in Washington, D.C.; Robertson Boulevard in West Hollywood; Collins Avenue; Lincoln Road; Wynwood and the Design District in Miami.

[9] Each Ashley Stewart store hired from within the community, and the company was recognized by President Clinton for its contribution to the Welfare-to-work program.

[11] As business boomed, Sitt sold his interest in 2000 to concentrate on urban real estate through his company Thor Equities.

Today, Thor's portfolio transactions and development pipeline total over 20 million square feet and is valued at more than $10 billion.

[24] Thor has also made significant investments in the Meatpacking District, betting on the area to continue its climb as a premier retail destination in Manhattan, driven in part by the High Line and arrival of the new Whitney Museum.

[28] In March 2015, the company leased its entire 15,000-square-foot building at 155 Mercer Street in SoHo to Dolce & Gabbana for the brand's flagship retail store.

Other areas of Manhattan where Thor owns properties include Tribeca, Madison Avenue, Chelsea, Bowery, Flatiron, the Upper East Side, and its headquarters near Bryant Park.

[citation needed] Thor then reinvested in more land on Coney Island along Stillwell Avenue as well as some Boardwalk property including Astroland.

In 2006, Thor announced plans for a $1.5 billion Las Vegas-style amusement park resort, which required several zoning changes.

The building is home to the San Francisco office of the Sears Corporation as well as Twitter co-founder Evan Williams' startup Obvious Corp.[42][43] In a press release announcing the lease to Obvious, Joseph Sitt cited the growing trend of Silicon Valley tech companies moving to the surrounding area to set up shop.

The venture's first project was a full block high-end retail development along Playa del Carmen's Quinta Avenida.

[51] Joseph Sitt is the chairman and founder of the not-for-profit Global Gateway Alliance (GGA), which was created in 2012 to address the infrastructure challenges that New York's airports face.

[52][53][54] Joseph Sitt is an active board member of the Bedford Stuyvesant Restoration Corporation, a community development organization.

[57] Sitt is a managing director of Venetian Heritage, a not-for-profit organization that works to restore the Jewish museum and ancient synagogues of the Ghetto of Venice.

When they clashed over a crucial deadline in an approximately $24 million Flatiron District retail contract, Thor Equities and Mactaggart Family & Associates pulled out their abacus and calendar according to new lawsuit.