Jemstone Group
(JJ Operating)
358 5th Ave, Suite 704. New York, NY, 10001
People:
Jemstone Group NYC portfolio
$440.8 million -retail 72%, mixed-use 16%, office 11%; Manhattan 42%, Bronx 34%, Brooklyn 19%*
504th largest portfolio by dollar value
935,476 sqft – retail 34%, office 33%, mixed-use 32%; Bronx 51%, Brooklyn 39%, Manhattan 5%
518th largest by SF
18 properties – Manhattan 33%, Brooklyn 33%, Bronx 27%
567th largest
26 residential units – Manhattan 50%, Brooklyn 50%
3453th 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: 3 for $13.3 million
Borrower company: 3 for $212.7 million
Top Ten Associated Companies:
Signature Bank (4), Pacific Western Bank (1), Apollo Global Management (1), Yitzchok Katz (1), Raimondo Zaytoune (1), Tristate Capital Bank (1), Extell Development (1), Feil Organization (1), TriState Capital Bank (1), Capital One (1)
Top Ten Associated People:
Kenneth A. Stagnari (3), Paul Verdi (2), Jeffrey Horowitz (1), Yitzchok Katz (1), Raimondo Zaytoune (1), Jeffrey Feil (1), Haley Holmberg (1), Uzi Shvut (1), Grace Chiang (1)
Recent activity as company:
• ISJ Management and JJ Operating sold 3696 Nostrand Avenue, Sheepshead Bay, Brooklyn 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.
• Jemstone Group borrowed $11.1 million from Signature Bank for 186 Montague Street on June 05, 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: