Investor Profile - MA
Jumantro Sianturi
Jumantro Sianturi is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 40 properties held through 14 holding companies. Recent mortgage relationships include RD ADVISORS, MALDEN TEACHERS FCU, and QS Private Lending.
Jumantro's Activity
As of June 2026, public records show approximately $22.0M in recorded mortgage exposure linked to this investor across at least 37 mortgage filings and 40 properties held through 14 holding companies. Activity appears concentrated in residential and commercial assets recorded between 2015 and 2026.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02148, 02180, 02149, 01830, and 02155
Most activity in MALDEN, STONEHAM, HAVERHILL, EVERETT, and MEDFORD.
Property Type Breakdown
Associated Entities (14)
MA · 2 properties · 6 mortgages
MA · 1 property · 6 mortgages
+12 more entities not shown
Mortgages (37)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 03/13/2026 | $401k | Open | Builders Capital | 10 WILLIAM STREET LLC | 8 WILLIAM ST #10, HAVERHILL, MA 01830 |
| 03/13/2026 | $401k | Open | Builders Capital | 10 WILLIAM STREET LLC | 10 WILLIAM ST, HAVERHILL, MA 01830 |
+35 more not shown
Owned Properties (40)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 38 PLEASANT ST, EVERETT, MA 02149 | NORTHSTARS REALTY LLC | Owns - 9 mos | $1.3M |
| 108 GREENWOOD ST, WAKEFIELD, MA 01880 | NORTHSTARS REALTY LLC | Sold | $700k |
+38 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential, commercial, and office properties across Boston-Worcester, MA-NH.
What companies is Jumantro Sianturi associated with?
Jumantro Sianturi is associated with 14 entities based on extracted signatures from public records. Key entities include LYNN HOMES LLC, 41 WARREN LLC, ONEDEAN LLC, 10 WILLIAM STREET LLC, and NORTHSTARS REALTY LLC.
How many properties are associated with this investor?
At least 40 properties are associated with Jumantro Sianturi and the entities they control, based on signatures extracted from recorded documents connecting Jumantro Sianturi to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references RD ADVISORS, MALDEN TEACHERS FCU, and QS Private Lending, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2015 through 2026, with the most recent mortgage recorded in 2026.
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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