Investor Profile - CO
Karlston Nasser
Karlston Nasser is a real estate investor and operator based in Denver-Boulder, CO. Public filings show activity across 21 properties held through 12 holding companies. Recent mortgage relationships include Alpine Bank and Bank of Colorado.
Karlston's Activity
As of June 2026, public records show approximately $11.1M in recorded mortgage exposure linked to this investor across at least 16 mortgage filings and 21 properties held through 12 holding companies. Activity appears concentrated in residential and office assets recorded between 2021 and 2026.
Primary Geography
Denver-Boulder, CO
ZIP codes: 80302, 80303, and 80112
Most activity in BOULDER and CENTENNIAL.
Property Type Breakdown
Associated Entities (12)
CO · 3 properties · 2 mortgages
CO · 1 property · 2 mortgages
+10 more entities not shown
Mortgages (16)
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 05/12/2026 | $710k | Open | Alpine Bank | 880 PARTNERS LLC | 911 BROADWAY ST, BOULDER, CO 80302 |
| 05/12/2026 | $620k | Open | Alpine Bank | 880 PARTNERS LLC | 880 19TH ST, BOULDER, CO 80302 |
+14 more not shown
Owned Properties (21)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 880 19TH ST, BOULDER, CO 80302 | 880 PARTNERS LLC | Owns - 1 mo | $975k |
| 2790 UNIVERSITY HEIGHTS AVE, BOULDER, CO 80302 | 2790 PARTNERS LLC | Owns - 8 mos | $1.6M |
+19 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential and office properties across Denver-Boulder, CO.
What companies is Karlston Nasser associated with?
Karlston Nasser is associated with 12 entities based on extracted signatures from public records. Key entities include 15TH ST PARTNERS LLC, 880 PARTNERS LLC, 19TH STREET PARTNERS LLC, 19TH ST PARTNERS II LLC, and ARAPAHOE PARTNERS LLC.
How many properties are associated with this investor?
At least 21 properties are associated with Karlston Nasser and the entities they control, based on signatures extracted from recorded documents connecting Karlston Nasser to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references Alpine Bank and Bank of Colorado, indicating a mix of lending relationships.
How recent is their activity?
Records show activity from 2021 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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