Investor profile - MA
Joseph Martignetti
Joseph Martignetti is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 3 properties held through 12 holding companies. Recent mortgage relationships include Rockland Trust and Winchester Savings Bank.
Joseph's Activity
As of December 2025, public records show approximately $50.1M in recorded mortgage exposure linked to this investor across at least 13 mortgage filings and 3 properties held through 12 holding companies. Activity appears concentrated in industrial assets recorded between 2014 and 2022.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 01801 and 01887
Most recorded activity for this investor appears in WOBURN and WILMINGTON.
Property Type Breakdown
Associated Entities (12)
MA · 0 properties · 4 mortgages
MA · 0 properties · 2 mortgages
MA · 2 properties · 2 mortgages
+9 more not shown
Mortgages (13)
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 11/04/2022 | $5.4M | Open | Winchester Savings Bank | 90 RESEARCH DEVELOPMENT LLC | - |
| 01/07/2022 | $5.5M | Open | Winchester Savings Bank | 304 CAMBRIDGE LLC | 304 CAMBRIDGE RD, WOBURN, MA 01801 |
| 01/07/2022 | $3.5M | Open | Winchester Savings Bank | 304 CAMBRIDGE LLC | 304 CAMBRIDGE RD, WOBURN, MA 01801 |
+10 more not shown
Owned Properties (3)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 10 MICRO DR, WOBURN, MA 01801 | 10 MICRO DRIVE LLC | Owns - 8.7 yrs | $100 |
| 317 NEW BOSTON ST, WOBURN, MA 01801 | 317 NB DEVELOPMENT LLC | Owns - 9.3 yrs | $100 |
| 100 RESEARCH DR, WILMINGTON, MA 01887 | MBRT 100 LLC | Owns - 10.0 yrs | $16.6M |
+0 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in industrial properties across Boston-Worcester, MA-NH.
What companies is Joseph Martignetti associated with?
Joseph Martignetti is associated with 12 entities based on extracted signatures from public records. Key entities include 304 CAMBRIDGE LLC, BEACH STREET ROCKPORT LLC, 10 MICRO DRIVE LLC, 317 NB DEVELOPMENT LLC, and SACHEM VENTURES LLC.
How many properties are associated with this investor?
At least 3 properties are associated with Joseph Martignetti and the entities they control, based on signatures extracted from recorded documents connecting Joseph Martignetti to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Rockland Trust and Winchester Savings Bank, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2014 through 2022, with the most recent mortgage recorded in 2022.
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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