Investor profile - MA
William Mcquillan
William Mcquillan is a real estate investor and operator based in Boston-Worcester, MA-NH. Public filings show activity across 17 properties held through 21 holding companies. Recent mortgage relationships include Wells Fargo Bank and Northwestern Mutual.
William's Activity
As of December 2025, public records show approximately $649.9M in recorded mortgage exposure linked to this investor across at least 18 mortgage filings and 17 properties held through 21 holding companies. Activity appears concentrated in commercial and industrial assets recorded between 2014 and 2025.
Associated People
Primary Geography
Boston-Worcester, MA-NH
ZIP codes: 02472, 02114, 02126, 02215, and 02125
Most recorded activity for this investor appears in WATERTOWN and BOSTON.
Property Type Breakdown
Associated Entities (21)
MA · 32,934 properties · 8 mortgages
MA · 4 properties · 2 mortgages
MA · 2 properties · 2 mortgages
+18 more not shown
Mortgages (18)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 11/21/2025 | $34.8M | Open | Eastern Bank | ARSENAL HOTEL LLC | 25 BOND ST, READING, MA 01867 |
| 09/24/2024 | $53.0M | Open | NATIONWIDE LIFE INS | BAM HOTEL LLC | 121 BROOKLINE AVE, BOSTON, MA 02215 |
| 06/05/2023 | $150.0M | Open | Northwestern Mutual | 100 FORGE HOLDING LLC | 100 102 HILLSIDE RD, WATERTOWN, MA 02472 |
+15 more not shown
Owned Properties (17)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 100 102 HILLSIDE RD, WATERTOWN, MA 02472 | NORTHWESTERN MUTUAL LIFE INSURANCE CO | Sold | $0 |
| 100 102 HILLSIDE RD, WATERTOWN, MA 02472 | ADVANCED EXTERIORS AND GLAZING OF NEW ENGLAND LLC | Sold | $392k |
| 485 ARSENAL ST, WATERTOWN, MA 02472 | - | Sold | $0 |
+14 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in commercial, industrial, and misc properties across Boston-Worcester, MA-NH.
What companies is William Mcquillan associated with?
William Mcquillan is associated with 21 entities based on extracted signatures from public records. Key entities include WELLS FARGO BANK NA, BACK STREET BOSTON HOLDINGS LLC, 100 FORGE HOLDING LLC, CITIZENS BANK NA, and ARSENAL HOTEL LLC.
How many properties are associated with this investor?
At least 17 properties are associated with William Mcquillan and the entities they control, based on signatures extracted from recorded documents connecting William Mcquillan to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Wells Fargo Bank and Northwestern Mutual, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2014 through 2025, with the most recent mortgage recorded in 2025.
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.
Elementix is not a consumer reporting agency, and this information does not constitute a consumer report. The data may not be used to make decisions about an individual's eligibility for personal credit, consumer housing, employment, insurance, or any other purpose governed by the Fair Credit Reporting Act.
Elementix may suppress certain contact indicators where legally required or where appropriate for safety or privacy reasons. Requests for removal, suppression, or correction of information must be submitted to compliance@elementix.ai. Elementix reviews such requests only where required by applicable law or where information is factually inaccurate. General objections or unsupported demands do not create a removal obligation.