Investor Profile - CA
Sergio Martinez
Sergio Martinez is a real estate investor and operator based in San Francisco Bay Area, CA. Public filings show activity across 37 properties held through 4 holding companies. Recent mortgage relationships include Stockton Mortgage, PANIAGUA TERESA, and ROGELLO A DIAZ ETUX.
Sergio's Activity
As of June 2026, public records show approximately $903k in recorded mortgage exposure linked to this investor across at least 16 mortgage filings and 37 properties held through 4 holding companies. Activity appears concentrated in residential and vacant assets recorded between 2016 and 2026.
Associated People
Primary Geography
San Francisco Bay Area, CA
ZIP codes: 95215, 95206, 95220, 94536, and 95205
Most activity in STOCKTON, ACAMPO, FREMONT, IONE, and GALT.
Property Type Breakdown
Associated Entities (4)
CA · 8 properties · 15 mortgages
CA · 85 properties · 1 mortgage
+2 more entities not shown
Mortgages (16)
Top Lenders
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 02/10/2026 | $300k | Open | Stockton Mortgage | LOS ALTOS LLC | 25393 KENNEFICK RD, GALT, CA 95632 |
| 08/26/2024 | $200k | Open | PANIAGUA TERESA | LOS ALTOS LLC | 138 2ND ST, GALT, CA 95632 |
+14 more not shown
Owned Properties (37)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 25393 KENNEFICK RD, GALT, CA 95632 | LOS ALTOS LLC | Owns - 5 mos | $450k |
| 1017 ROYAL OAKS DR, STOCKTON, CA 95209 | LOS ALTOS LLC | Sold | $360k |
+35 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential, vacant, and agricultural properties across San Francisco Bay Area, CA.
What companies is Sergio Martinez associated with?
Sergio Martinez is associated with 4 entities based on extracted signatures from public records. Key entities include LOS ALTOS LLC, MARTINEZ PROPERTIES LLC, KSS PROPERTIES LLC, and NILES REAL ESTATE LLC.
How many properties are associated with this investor?
At least 37 properties are associated with Sergio Martinez and the entities they control, based on signatures extracted from recorded documents connecting Sergio Martinez to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Stockton Mortgage, PANIAGUA TERESA, and ROGELLO A DIAZ ETUX, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2016 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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