Photo: Alpha Mark (Nathanial Jeffrey Brinkman – Right)
Duluth, MN — Nathanial Jeffrey Brinkman, co-founder of Duluth-based marketing firm AlphaMark, has a criminal record stemming from a 2017 felony assault in Austin, Minnesota, along with longstanding public allegations of sexual misconduct, according to local residents.
2017 Felony Assault Conviction
Brinkman was convicted of third-degree felony assault for an incident on March 18, 2017, in Austin, MN. Minnesota criminal court file 50‑CR‑17‑710 documents the charges, while civil court file 50‑CV‑17‑2009 ordered Brinkman to pay $7,624.96 in restitution to the victim, Kenny Allen Ree, for injuries sustained during the attack.
Court filings indicate that video evidence submitted to the court played a key role in confirming the assault. The video depicts Brinkman striking the victim, followed by further physical contact until he was removed from the victim by others. The video will be available for review in connection with this article.
Public Allegations and Move to Duluth
According to local residents of Austin, MN, Brinkman faced sexual assault allegations prior to relocating to Duluth. These allegations have not been verified in court records but have followed him for many years, according to posts and discussions on public forums. Brinkman’s move to Duluth coincided with the establishment of his marketing business, AlphaMark.
Named in Father’s Civil Lawsuit Dismissed Under UPEPA
Nathanial Jeffrey Brinkman was also named in a civil lawsuit filed by his father, Jeff Brinkman, under file number 27‑CV‑24‑13993 in Hennepin County District Court. The case, which involved multiple defendants, was dismissed under the Uniform Parentage and Enforcement of Parental Accountability Act (UPEPA).
The court awarded attorneys’ fees and costs to the defendants, who remain anonymous in public reporting:
-
One defendant was awarded $11,782 in attorneys’ fees and $757 in costs
-
A group of other defendants collectively received $19,945.58 in attorneys’ fees and $240 in costs
The dismissal demonstrates that the claims in the lawsuit were not sustained, yet Nathanial Brinkman’s inclusion in the case adds to the public scrutiny surrounding him.
AlphaMark and Its Operations
Brinkman currently operates AlphaMark, a marketing and promotional products company he co-founded with Daniel Larson. The company provides promotional products, branded apparel, graphic design, and marketing solutions.
Other key team members include:
-
Rachel Theiste – Art Director
-
Bailey Kanstrup – E-Commerce Coordinator
-
Blake Halsey – Sales Representative
Clients and Business Connections
AlphaMark maintains business relationships with multiple Minnesota companies, including:
-
Life 97.3
-
Rosenbauer
-
Wurth Elektronik
-
Superior Cannabis Company (owned by Brinkman’s father)
-
Terex Corporation
-
White Pine Pet Care
-
HOOPS Brewing
-
Earth Rider Brewery
-
Vikre Distillery
-
Surly Brewery
-
Kinney Creek Brewery
-
MCD Express Inc.
-
H & M Trucking
-
Helgesen
Despite his felony conviction, public allegations, and inclusion in his father’s dismissed lawsuit, Brinkman continues to operate a company serving notable local and regional clients.
Legal and Public Record Notes
All information in this report is drawn from Minnesota court filings and publicly available business information from AlphaMark’s website. Public allegations are presented as reported by local residents and have not been verified in court records. References to Jeff Brinkman’s civil case (27‑CV‑24‑13993) reflect the official dismissal under UPEPA, with attorneys’ fees and costs awarded to defendants whose identities are kept confidential. Video evidence from Brinkman’s criminal case is summarized factually without graphic detail, and is available for review in connection with this article.
Footage of Nathanial Brinkman assaulting Kenny Ree (Mower County Court)
Case Number: 50-CR-17-710 (Mower County Court)
Case Number: 50-CV-17-2009 (Mower County Court)