Sergey Rybak
Principal
Rybak Development
Developer, Owner
227 Sea Breeze Avenue, Suite C-403. Brooklyn, NY 11224
1817 Emmons Avenue, 2nd Floor Brooklyn, NY 11235
Rybak Development NYC portfolio
$453.4 million -development 26%, condo 23%, retail 17%; Manhattan 43%, Brooklyn 35%, Queens 20%*
487th largest portfolio by dollar value
308,544 sqft – condo 61%, elevator 12%, development 11%; Brooklyn 63%, Manhattan 25%, Queens 11%
1164th largest by SF
14 properties – Manhattan 47%, Brooklyn 47%, Queens 5%
726th largest
366 residential units – Brooklyn 49%, Queens 26%, Manhattan 24%
751th largest by residential units
0 foreclosures, 0 bankruptcies, 175 other court cases.
Person Activity past 24 months:
Buyer signatory: 2 for $13.7 million
Borrower signatory: 4 for $112.4 million
Developer (new building or major alteration): 25 for 130,093 square feet
Top Ten Associated Companies:
Valley National Bank (8), Maxim Capital Group (3), MF1 Capital (1), JPMorgan Chase (1), Townhouse Management Company (1), Catholic Near East Welfare Association (1), Bank Hapoalim (1), Sapir Organization (1), BK Developers (1), Semyon Vays (1)
Top Ten Associated People:
Declan P. Meagher (2), Christopher McKenna (1), Mitchel Maidman (1), Eric Sadkin (1), Peter I. Vaccari (1), Sharon Raz (1), Victor Brown Jr. (1), Mark Zeldin (1), Mark Penna (1), Victor Brown (1)
Recent activity as signatory:
• BK Developers and Semyon Vays sold None for $4 million to Rybak Development on March 13, 2026.
• Sergey Rybak filed plans for new building for 44,410 sqft in Lenox Hill, Manhattan, on September 26, 2025.
• Rybak Development borrowed $28.1 million from Valley National Bank for 722 59th Street, Sunset Park, Brooklyn on September 04, 2025.
• Catholic Near East Welfare Association sold 250 East 62 Street for $9.7 million to Rybak Development on September 03, 2025.
• Rybak Development borrowed $5.8 million from Bank Hapoalim for 250 East 62 Street on September 03, 2025.
• Rybak Development borrowed $26.5 million from Maxim Capital Group for 500 East 81 Street on May 22, 2025.
• Rybak Development borrowed $52 million from Emerald Creek Capital for 133 East 55 Street on August 07, 2024.
• Sergey Rybak filed plans for new building for 41,142 sqft in Grand Central, Manhattan, on June 14, 2024.
• Rybak Development borrowed $10.1 million from Valley National Bank for None on April 01, 2024.
• Sergey Rybak filed plans for new building for 34,524 sqft in Yorkville, Manhattan, on January 30, 2024.
Latest Stories:
• Rybak Development pays $4M for dev site in Boerum Hill (March 20, 2026)
• Rybak Development pays $9.7M to Catholic nonprofit for dev site in Lenox Hill (September 12, 2025)
• Rybak signs $26.5M construction loan with Maxim for 9-unit project in Yorkville (June 10, 2025)
• Rybak Dev in contract to pay $9.7M for nearly 41K sf Lenox Hill dev site (March 19, 2025)
• Rybak Development files DOB plans for 26-unit building in Grand Central (June 21, 2024)
• Namdar, Klosed, partners, sign $147.1M refi for 20 properties in NYC (June 06, 2024)
• Rybak Development plans 9-unit building in Yorkville (February 11, 2024)
• Rybak signs $71M construction loan for $166M condo project in Forest Hills (January 22, 2024)
• Rybak Development pays $12M to Sapir for retail building in Grand Central (December 21, 2023)