Investor Profile - MA
Sieon Sanieoff
Sieon Sanieoff is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 68 properties held through 6 holding companies. Recent mortgage relationships include Rockland Trust, FIRST REPUBLIC BANK, and Middlesex Federal Savings.
Sieon's Activity
As of June 2026, public records show approximately $8.2M in recorded mortgage exposure linked to this investor across at least 4 mortgage filings and 68 properties held through 6 holding companies. Activity appears concentrated in residential and commercial assets recorded between 2015 and 2022.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02134, 02445, 02135, 02446, and 02124
Most activity in ALLSTON, BROOKLINE, BRIGHTON, DORCHESTER CENTER, and NEWTON CENTER.
Property Type Breakdown
Associated Entities (6)
MA · 3 properties · 2 mortgages
MA · 0 properties · 1 mortgage
+4 more entities not shown
Mortgages (4)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 04/15/2022 | $2.0M | Open | FIRST REPUBLIC BANK | UNITED S REALTY LLC | 43 SAINT PAUL ST #45, BROOKLINE, MA 02446 |
| 09/07/2018 | $2.9M | Open | Rockland Trust | SYROOS SANIEOFF | 378 WASHINGTON ST #380, DORCHESTER CENTER, MA 02124 |
+2 more not shown
Owned Properties (68)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 43 SAINT PAUL ST #45, BROOKLINE, MA 02446 | UNITED S REALTY LLC | Owns - 4.2 yrs | $0 |
| 1318 COMMONWEALTH AVE #18, ALLSTON, MA 02134 | COMM AVE 1318 LLC | Owns - 5.4 yrs | $0 |
+66 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential, commercial, and exempt properties across Boston-Worcester, MA-NH.
What companies is Sieon Sanieoff associated with?
Sieon Sanieoff is associated with 6 entities based on extracted signatures from public records. Key entities include A & B REALTY TRUST, TRUSTEES OF A & B REALTY TRUST, UNITED S REALTY LLC, 271 273 COREY ROAD REALTY TRUST, and LOTHIAN 15 17 LLC.
How many properties are associated with this investor?
At least 68 properties are associated with Sieon Sanieoff and the entities they control, based on signatures extracted from recorded documents connecting Sieon Sanieoff to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Rockland Trust, FIRST REPUBLIC BANK, and Middlesex Federal Savings, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2015 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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