Jemstone Group
(JJ Operating)
358 5th Ave, Suite 704. New York, NY, 10001
People:
Jemstone Group NYC portfolio
$435 million -retail 72%, mixed-use 15%, office 11%; Manhattan 43%, Bronx 34%, Brooklyn 18%*
578th largest portfolio by dollar value
928,905 sqft – retail 34%, office 33%, mixed-use 31%; Bronx 52%, Brooklyn 38%, Manhattan 5%
562th largest by SF
17 properties – Manhattan 35%, Bronx 29%, Brooklyn 29%
668th largest
20 residential units – Manhattan 65%, Brooklyn 35%
3913th largest by residential units
1 foreclosure, 0 bankruptcies, 2 other court cases.
Notes
Jemstone Group is an affiliate of JJ Operating, all owned by members of the Jemal family.
Company Activity past 24 months:
Seller company: 4 for $15.7 million
Borrower company: 2 for $204.8 million
Top Ten Associated Companies:
Signature Bank (4), Yitzchok Katz (1), Raimondo Zaytoune (1), Apollo Global Management (1), Extell Development (1), Feil Organization (1), Uzi Shvut (1), TriState Capital Bank (1), Kanstantsin Skirukha (1), Pacific Western Bank (1)
Top Ten Associated People:
Kenneth A. Stagnari (3), Paul Verdi (2), Yitzchok Katz (1), Raimondo Zaytoune (1), Jeffrey Horowitz (1), Jeffrey Feil (1), Uzi Shvut (1), Kanstantsin Skirukha (1), Haley Holmberg (1), Grace Chiang (1)
Recent activity as company:
• JJ Operating, Joseph J. Jemal, ISJ Management and Parkway Management sold 849 Manhattan Avenue for $2.4 million to Kanstantsin Skirukha on July 08, 2026.
• ISJ Management and JJ Operating sold None for $3.6 million to Raimondo Zaytoune on April 27, 2026.
• Jemstone Group sold 2946 3 Avenue for $2 million to Uzi Shvut on December 09, 2025.
• JJ Operating borrowed $19.8 million from TriState Capital Bank for 555 Bergen Avenue on September 30, 2025.
• JJ Operating sold 382 Fulton Street for $7.7 million to Extell Development and Feil Organization on July 09, 2025.
• JJ Operating borrowed $185 million from Apollo Global Management for None on April 11, 2025.
• JJ Operating borrowed $7.9 million from Tristate Capital Bank for 8 Flatbush Avenue on June 12, 2024.
• JJ Operating borrowed $39 million from Starwood Mortgage Capital for Howard building on October 13, 2023.
• Eduard Yakubov sold 768 East 31 Street for $1.7 million to Jemstone Group and Joseph Cohen on October 20, 2022.
• ISJ Management, Jemstone Group and Billy Shalom sold 360 Livingston Street for $25.5 million to Yitzchok Katz on August 25, 2022.
Latest Stories:
• Raimondo Zaytoune pays $3.6M to Jemal family for retail in Sheepshead Bay (June 10, 2026)
• Jemal family’;s JJ Operating signs $185M refi with Apollo for Chelsea (April 18, 2025)
Court Records:
Properties: