Thomas James Mattingly

Employer firm

Big Sioux Wealth Management CRD 299593

$235M regulatory AUM

Reported services (Item 5G)

• Financial planning
• Portfolio management (individuals)
• Pension consulting
• Selection of other advisers
• Educational seminars

From the firm’s Form ADV. Read the guides:

• Item 5F — Regulatory AUM
• Item 5G — Advisory services
• Full firm profile

Current Employers

Employment History

• 09/2023 → Present
  Big Sioux Financial, Inc. Dba Big Sioux Wealth Management
  Watertown, SD
• 08/2009 → 08/2023
  Watertown School District
  Watertown, SD

Other Businesses

1. Basketball and Football Coach at Watertown High School. Start Date: 12/2024. Not investment related. Approximately 30 hours per month, 0 hours per month during securities trading hours. 2. Legacy Properties - Commercial LLC and Legacy Properties - Residential LLC; Partnership LLC of rental properties in Watertown, SD; 117 Summerwood Dr. Watertown, SD 57201; Landlord for Residential Rentals and Commercial Rentals; President and part-owner of both LLCs; July 10, 2025; 10 - 15 Hours per month; 2-3 Hours per month; primary role is bookeeping for the properties and occasional showings.

Exams

• S65 Uniform Investment Adviser Law Examination
  2023-09-01

Other Names

• Tommy Mattingly
• Tom Mattingly