Martin Kirzner
Chief Executive Officer
Sharp Management
Owner
Sharp Management|Martin Kirzner NYC portfolio
$229.3 million -walkup 56%, elevator 30%, mixed-use 12%; Bronx 60%, Brooklyn 23%, Manhattan 15%*
889th largest portfolio by dollar value
1,283,980 sqft – walkup 64%, elevator 31%, mixed-use 4%; Bronx 60%, Manhattan 20%, Brooklyn 18%
398th largest by SF
58 properties – Bronx 43%, Brooklyn 29%, Manhattan 27%
148th largest
1,447 residential units – Bronx 56%, Manhattan 26%, Brooklyn 17%
238th largest by residential units
Other Links:
Person Activity past 24 months:
Seller signatory: 2 for $10.6 million
Borrower signatory: 1 for $6.1 million
Top Ten Associated Companies:
Denali Management (6), Michael Rothstein (1), Gilman Management (1), Prana Investments (1), Customers Bank (1), JPMorgan Chase (1), Dime Community Bank (1), Newpoint Real Estate Capital (1), L+M Development Partners (1), Signature Bank (1)
Top Ten Associated People:
Jonathan Wiener (5), David Koshers (2), Michael Rothstei (1), Richard Herman (1), Ursula Flores (1), Philip G. Rinaldi (1), Brad Casey (1), Eben Ellertson (1), Ben Rieder (1), Ana McBayne (1)
Recent activity as signatory:
• Sharp Management sold 643 Cauldwell Avenue for $5.7 million to Mark J. Schwartz and GRE Holdings on May 27, 2026.
• Sharp Management sold 355 Lincoln Place for $4.9 million to Gilman Management on September 18, 2025.
• Sharp Management borrowed $6.1 million from NewPoint Real Estate Capital for 2800 Frederick Douglass Boulevard on November 27, 2024.
• Martin Kirzner sold 2305 Clarendon Road for $1.3 million to Michael Rothstein on May 16, 2024.
• Sharp Management borrowed $14.3 million from Dime Community Bank for 217 West 146 Street on May 05, 2024.
• Sharp Management borrowed $30.3 million from Newpoint Real Estate Capital for 429 East 137 Street on February 29, 2024.
• Sharp Management borrowed $32 million from JPMorgan Chase for 235 Brook Avenue on September 19, 2022.
• Sharp Management sold 1514 Sedgwick Avenue for $22.5 million to Yechiel Newhouse on April 28, 2022.
• Sharp Management sold 158 East 103 Street for $24 million to L+M Development Partners on December 03, 2021.
• Sharp Management sold 1025 Longwood Avenue for $3 million to Denali Management on September 24, 2021.
• Sharp Management sold 3007 3 Avenue for $3 million to Denali Management on September 24, 2021.
• Sharp Management sold 526 East 138 Street for $17.9 million to Denali Management on September 24, 2021.
• Sharp Management sold 533 East 139 Street for $2.6 million to Denali Management on September 24, 2021.
• Sharp Management sold 537 East 139 Street for $2.8 million to Denali Management on September 24, 2021.
• Sharp Management sold 514 East 138 Street for $7.5 million to Denali Management on September 24, 2021.
• Martin Kirzner borrowed $5.8 million from Customers Bank for 226 West 149 Street on January 01, 2021.
• Sharp Management sold 2105 Walton Avenue for $7 million to Prana Investments on July 28, 2020.
• Sharp Management borrowed $9 million from Signature Bank for 267 West 140 Street on June 22, 2020.
Latest Stories:
• GRE, Mark J. Schwartz, pay $5.7M to Sharp Management for walkups in Longwood (June 11, 2026)
• Sharp Management sells 58-unit walkup in Prospect Heights for $4.9M (October 23, 2025)
• Michael Rothstein pays $1.3M for 16-unit walkup in Flatbush (May 30, 2024)
• L+M Development pays $24M to Sharp Management for rental in East Harlem (December 15, 2021)
• Denali Management pays $29.5M to Sharp Management for rentals in Bronx (October 08, 2021)
• Denali Management pays $7.5M to Sharp Management for two rentals in Mott Haven (October 07, 2021)
• Prana pays $7M for multifamily in Fordham, 7th city buy since November (August 06, 2020)