[12] In October 2022, it was announced that Campus Apartments plans to construct a new 162,000 square foot headquarters on 41st and Walnut streets by 2026 featuring 136 new residential units and office space.

[13][14] In July 2024, Campus Apartments broke ground on a $148.75 million graduate student housing development at the University of Maryland, College Park, featuring a 323,000-square-foot LEED Silver-certified residential building that will provide 741 beds for the 2026-2027 academic year.

[17] In 2013, Adelman, with group of Philadelphia-based investors, led a $30 million investment into private aviation company Wheels Up, founded by serial entrepreneur Kenny Dichter.

[19][20] On January 5, 2021, Wheels Up announced its acquisition of Mountain Aviation, the 10th largest private jet charter operator in the U.S., bringing its total fleet to 350 aircraft.

[24] [25] In October 2020 Adelman co-led an investment into VIDE Beverages, a ready-to-drink vodka soda brand, with model, actress and entrepreneur Olivia Culpo.

[30] In October 2022, Adelman bought a 10% ownership stake in Harris Blitzer Sports & Entertainment from Michael G. Rubin, which owns and operates the 76ers, the NHL's New Jersey Devils, and the Prudential Center.

As part of the development, Adelman committed to a $60 million community benefits agreement supporting the city, school district, Chinatown, and minority-owned businesses.

The agreement came after NBA Commissioner Adam Silver helped broker peace between the two companies, bringing an end to their long-running dispute over the team's future arena plans.

[38] In January 2024, Adelman offered a $25,000 reward through the Philadelphia Crime Commission tip line to identify a vandal who spray-painted a swastika at the Horwitz-Wasserman Holocaust Memorial Plaza, which honors his grandfather Sam Wasserman's survival story.

[39] When the $36 million Alan Horwitz 'Sixth Man' Center operated by Philadelphia Youth Basketball opened in Philadelphia in July 2024, Adelman served as a lead donor, with the Adelman Family Stadium Court named to honor his longtime mentor and Campus Apartments founder Alan Horwitz, who initiated the project with a $5 million gift and whose passionate 76ers fandom earned him the nickname 'Sixth Man'.