Investor profile - MA
Martin Karol
Martin Karol is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 6 properties held through 60 holding companies. Recent mortgage relationships include Everett Bank, East Cambridge Savings Bank, and Charles River Bank.
Martin's Activity
As of December 2025, public records show approximately $5.3M in recorded mortgage exposure linked to this investor across at least 7 mortgage filings and 6 properties held through 60 holding companies. Activity appears concentrated in residential and multifamily assets recorded between 2016 and 2023.
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02141, 01867, 02113, 01850, and 02460
Most recorded activity for this investor appears in CAMBRIDGE, READING, BOSTON, LOWELL, and NEWTON.
Property Type Breakdown
Associated Entities (60)
MA · 0 properties · 3 mortgages
MA · 2 properties · 3 mortgages
MA · 0 properties · 3 mortgages
+57 more not shown
Mortgages (7)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 01/31/2020 | $430k | Closed | East Cambridge Savings Bank | 15 HARDING STREET LLC | 15 HARDING ST, CAMBRIDGE, MA 02141 |
| 11/06/2019 | $700k | Open | Everett Bank | 3 5 QUINCY COURT LLC | 3 QUINCY CT, BOSTON, MA 02113 |
| 02/08/2019 | $986k | Closed | East Cambridge Savings Bank | 15 HARDING STREET LLC | 15 HARDING ST, CAMBRIDGE, MA 02141 |
+4 more not shown
Owned Properties (6)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 52 SANBORN ST, READING, MA 01867 107 | - | Sold | $0 |
| 26 HARDWICK ST, CAMBRIDGE, MA 02141 2 | CHUAN CHANG | Sold | $888k |
| 26 HARDWICK ST, CAMBRIDGE, MA 02141 2 | JAMES TOMPKIN | Sold | $896k |
+3 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential and multifamily properties across Boston-Worcester, MA-NH.
What companies is Martin Karol associated with?
Martin Karol is associated with 60 entities based on extracted signatures from public records. Key entities include CAVE OF WONDERS LLC, 3 5 QUINCY COURT LLC, CRB RESIDENTIAL LLC, CC SIX LLC, and 157 159 MERRIMACK LLC.
How many properties are associated with this investor?
At least 6 properties are associated with Martin Karol and the entities they control, based on signatures extracted from recorded documents connecting Martin Karol to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Everett Bank, East Cambridge Savings Bank, and Charles River Bank, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2016 through 2023, with the most recent mortgage recorded in 2020.
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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