Investor Profile - MA
Jonathan Katz
Jonathan Katz is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 7 properties held through 5 holding companies. Recent mortgage relationships include FIRST REPUBLIC BANK and Cape Cod Five.
Jonathan's Activity
As of June 2026, public records show approximately $6.1M in recorded mortgage exposure linked to this investor across at least 4 mortgage filings and 7 properties held through 5 holding companies. Activity appears concentrated in residential assets recorded between 2019 and 2023.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02215, 02445, 02465, 02067, and 02038
Most activity in BOSTON, BROOKLINE, WEST NEWTON, SHARON, and FRANKLIN.
Property Type Breakdown
Associated Entities (5)
MA · 35 properties · 5 mortgages
MA · 1 property · 1 mortgage
+3 more entities not shown
Mortgages (4)
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 09/27/2021 | $2.6M | Open | Cape Cod Five | JONATHAN KATZ | 451 WILD HARBOR RD, NORTH FALMOUTH, MA 02556 |
| 06/24/2020 | $2.0M | Open | FIRST REPUBLIC BANK | 11 KESWICK LLC | 11 KESWICK ST, BOSTON, MA 02215 |
+2 more not shown
Owned Properties (7)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 451 WILD HARBOR RD, NORTH FALMOUTH, MA 02556 | ALCOLA REALTY LLC | Owns - 7.2 yrs | $2.0M |
| 40 INDIAN LN, FRANKLIN, MA 02038 | ALISON KATZ | Owns - 8.8 yrs | $465k |
+5 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential properties across Boston-Worcester, MA-NH.
What companies is Jonathan Katz associated with?
Jonathan Katz is associated with 5 entities based on extracted signatures from public records. Key entities include MAY INSTITUTE INC, 901 BEACON LLC, ALCOLA REALTY LLC, 11 KESWICK LLC, and ALCOLA REALTY NOMINEE TRUST.
How many properties are associated with this investor?
At least 7 properties are associated with Jonathan Katz and the entities they control, based on signatures extracted from recorded documents connecting Jonathan Katz to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references FIRST REPUBLIC BANK and Cape Cod Five, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2019 through 2023, with the most recent mortgage recorded in 2021.
How is associated activity determined?
Elementix uses AI to extract signatures from recorded documents. These signatures are used to determine the relationships between people and entities. This is a novel approach that goes beyond looking at corporate filings and skip-tracing.
The information displayed on this page is compiled from recorded real estate documents, business filings, and other lawfully available sources. Elementix summarizes and analyzes public record activity related to investment real estate and associated business entities. Any contact indicators shown (such as email domain references or partial phone digits) are provided solely as unverified signals and may be incomplete or outdated.
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