Investor profile - CO
Don Altman
Don Altman is a real estate investor and operator based in Denver-Boulder, CO. Public filings show activity across 32 properties held through 33 holding companies. Recent mortgage relationships include FirstBank, Elevations Credit Union, and CRYSTAL RIDGE COLORADO.
Don's Activity
As of December 2025, public records show approximately $92.7M in recorded mortgage exposure linked to this investor across at least 52 mortgage filings and 32 properties held through 33 holding companies. Activity appears concentrated in residential and multifamily assets recorded between 2014 and 2025.
Primary Geography
Denver-Boulder, CO
ZIP codes: 80304, 80302, 80305, 80301, and 80466
Most recorded activity for this investor appears in BOULDER and NEDERLAND.
Property Type Breakdown
Associated Entities (33)
CO · 1 property · 6 mortgages
CO · 0 properties · 3 mortgages
CO · 0 properties · 3 mortgages
+30 more not shown
Mortgages (52)
Top Lenders
$40.1M · 9 loans
$26.5M · 13 loans
$18.0M · 2 loans
| Date | Amount | Status | Lender | Borrower | Address |
|---|---|---|---|---|---|
| 02/26/2025 | $12.0M | Open | FirstBank | MAPLETON HILL INVESTMENTS LLC | - |
| 02/13/2024 | $110k | Open | FirstBank | 1357 SUMAC 1 LLC | 1357 SUMAC AVE, BOULDER, CO 80304 |
| 10/03/2022 | $1.5M | Open | FirstBank | 2690 VALMONT LLC | 2690 VALMONT RD, BOULDER, CO 80304 |
+49 more not shown
Owned Properties (32)
| Address | Deeded owner | Status | Consideration |
|---|---|---|---|
| 2690 VALMONT RD, BOULDER, CO 80304 | 2690 VALMONT LLC COLORADO LLC | Owns - 3.2 yrs | $2.4M |
| 2465 WALNUT ST, BOULDER, CO 80302 8 | MEGAN MCCONNELL | Sold | $1.3M |
| 2465 WALNUT ST, BOULDER, CO 80302 8 | ERIK ESTRADA | Sold | $1.2M |
+29 more not shown
FAQ
What type of real estate does this investor focus on?
Associated mortgages and deeds show activity in residential, multifamily, and misc properties across Denver-Boulder, CO.
What companies is Don Altman associated with?
Don Altman is associated with 33 entities based on extracted signatures from public records. Key entities include MAPLETON HILL INVESTMENTS LLC, GWIRTSMAN FAMILY LLC, 2215 LINDEN LLC, NEDERLAND INVESTMENT GROUP LLC, and JUNIPER INVESTMENT GROUP LLC.
How many properties are associated with this investor?
At least 32 properties are associated with Don Altman and the entities they control, based on signatures extracted from recorded documents connecting Don Altman to the entities.
Which lenders has this investor worked with?
Recent mortgage activity references FirstBank, Elevations Credit Union, and CRYSTAL RIDGE COLORADO, 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.
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