Investor profile - MA
William Thibeault
William Thibeault is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 6 properties held through 20 holding companies. Recent mortgage relationships include Rockland Trust, RBS CITIZENS NA, and DANA J MARKS TRUSTEE OF 136 SAINT BOTOLPH REALTY LENDING TRUST.
William's Activity
As of December 2025, public records show approximately $25.4M in recorded mortgage exposure linked to this investor across at least 8 mortgage filings and 6 properties held through 20 holding companies. Activity appears concentrated in office and commercial assets recorded between 2011 and 2021.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02116, 02109, and 02108
Most recorded activity for this investor appears in BOSTON.
Property Type Breakdown
Associated Entities (20)
MA · 0 properties · 2 mortgages
MA · 0 properties · 2 mortgages
MA · 0 properties · 1 mortgage
+17 more not shown
Mortgages (8)
Top Lenders
$10.9M · 2 loans
$10.4M · 2 loans
$4.0M · 1 loan
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 02/07/2018 | $4.0M | Open | DANA J MARKS TRUSTEE OF 136 SAINT BOTOLPH REALTY LENDING TRUST | ILBT LLC | 136 SAINT BOTOLPH ST, BOSTON, MA 02115 |
| 12/23/2015 | $21.4M | Closed | Rockland Trust | WASHINGTON LIBERTY LLC | 630 WASHINGTON ST, BOSTON, MA 02111 205 |
| 04/17/2014 | $8.3M | Open | Rockland Trust | BROMFIELD 44 LLC | 40 BROMFIELD ST, BOSTON, MA 02108 |
+5 more not shown
Owned Properties (6)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 8 CARVER ST, BOSTON, MA 02116 | STEINWAY 162 LLC | Sold | $18.4M |
| 162 BOYLSTON ST, BOSTON, MA 02116 3RD | STEINWAY 162 LLC | Sold | $18.4M |
| 19 CONGRESS ST, BOSTON, MA 02109 | PO SQ 13 19 CONGRESS ST LLC | Sold | $14.6M |
+3 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in office and commercial properties across Boston-Worcester, MA-NH.
What companies is William Thibeault associated with?
William Thibeault is associated with 20 entities based on extracted signatures from public records. Key entities include ILBT LLC, RUMMEY MARSHVIEW LLC, 103 ARCH STREET LLC, WASHINGTON LIBERTY LLC, and BROMFIELD 44 LLC.
How many properties are associated with this investor?
At least 6 properties are associated with William Thibeault and the entities they control, based on signatures extracted from recorded documents connecting William Thibeault to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Rockland Trust, RBS CITIZENS NA, and DANA J MARKS TRUSTEE OF 136 SAINT BOTOLPH REALTY LENDING TRUST, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2011 through 2021, with the most recent mortgage recorded in 2018.
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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