Missouri State Representative

Mark Matthiesen 2026 Regular Session - Authored & Sponsored Legislation

Legislative Session

Co-Sponsor of Legislation

MO

Missouri 2026 Regular Session

Missouri House Bill HB1618

Modifies provisions relating to indoor air quality
MO

Missouri 2026 Regular Session

Missouri House Bill HJR119

Introduced
1/7/26  
Refer
3/9/26  
Proposes a constitutional amendment changing how judges are selected to certain courts
MO

Missouri 2026 Regular Session

Missouri House Bill HB1901

Modifies provisions relating to indoor air quality
MO

Missouri 2026 Regular Session

Missouri House Bill HB3105

Introduced
1/27/26  
Refer
2/12/26  
Report Pass
2/26/26  
Modifies provisions regarding the rights of firearms owners

Primary Sponsor of Legislation

MO

Missouri 2026 Regular Session

Missouri House Bill HB1800

Introduced
1/7/26  
Refer
1/8/26  
Report Pass
1/22/26  
Refer
1/29/26  
Report Pass
2/9/26  
Refer
3/5/26  
Report Pass
3/9/26  
Engrossed
3/9/26  
Changes the percentage of the cap on the inflationary growth factor for the assessment growth of real or personal property occurring within a political subdivision, defines assessment value, and adds provisions related to the sales ratio studies performed by the State Tax Commission
MO

Missouri 2026 Regular Session

Missouri House Bill HB1802

Introduced
1/7/26  
Refer
1/15/26  
Report Pass
3/3/26  
Refer
3/5/26  
Allows election challengers to be present any time ballots are being cast
MO

Missouri 2026 Regular Session

Missouri House Bill HB3305

Modifies provisions governing mental health efforts in public schools
MO

Missouri 2026 Regular Session

Missouri House Bill HB3332

Introduced
2/18/26  
Refer
2/24/26  
Report Pass
3/25/26  
Modifies provisions relating to employment benefits for first responders
MO

Missouri 2026 Regular Session

Missouri House Bill HB3342

Introduced
2/18/26  
Prohibits personal property tax levies passed prior to January 1, 1975, from applying to motor vehicles
MO

Missouri 2026 Regular Session

Missouri House Bill HB1799

Authorizes taxpayers to submit petitions to reduce local tax rate levies
MO

Missouri 2026 Regular Session

Missouri House Bill HB1801

Changes the definition of "qualified student" for the Missouri Empowerment Scholarship Accounts Program
MO

Missouri 2026 Regular Session

Missouri House Bill HB3177

Establishes provisions relating to nuisance actions against racing facilities and race tracks
MO

Missouri 2026 Regular Session

Missouri House Bill HB2507

Prohibits labor organizations from collecting payment for union dues from a new employee until such employee has worked at least two hundred fifty hours
MO

Missouri 2026 Regular Session

Missouri House Bill HB2506

Introduced
1/7/26  
Refer
2/24/26  
Report Pass
3/12/26  
Refer
4/1/26  
Requires the office of childhood to design and develop placards that include a QR code containing a link to a child care facility's complaint investigations and inspection reports
MO

Missouri 2026 Regular Session

Missouri House Bill HB2528

Exempts portable solar generation devices from public service commission regulations