Cosmo Charles Hahn

Employer firm

Abacus Wealth Partners CRD 128590

$3.58B regulatory AUM 9 advisory clients

Reported services (Item 5G)

• Financial planning
• Portfolio management (individuals)
• Portfolio management (pooled vehicles)
• Portfolio management (institutions)
• Pension consulting
• Selection of other advisers

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

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

Current Employers

Employment History

• 10/2025 → 06/2026
  Ubs Financial Services, Inc
  San Francisco, CA
• 07/2024 → 07/2025
  Scinto Group Llp
  Grass Valley, CA
• 01/2024 → 04/2024
  Hawaii Health Partners - Hph
  Honolulu, CA
• 05/2024 → 06/2024
  South Lake Partners Llc
  Anaheim, CA
• 07/2023 → 12/2023
  N/A
  Honolulu, HI
• 12/2020 → 06/2023
  Buck Institute For Research On Aging
  Novato, CA
• 09/2018 → 06/2019
  Falcon Critical Care Transport
  Sunnyvale, CA
• 07/2019 → 08/2019
  Ucsc Biomedical Engineering
  Santa Cruz, CA
• 09/2019 → 10/2019
  June Bugs Gym
  Santa Cruz, CA
• 11/2019 → 11/2020
  N/A
  Santa Cruz, CA
• 07/2017 → 08/2018
  Premier Physical Therapy
  Santa Cruz, CA
• 12/2016 → 06/2017
  Ucsc- Opers
  Santa Cruz, CA
• 01/2015 → 11/2016
  N/A
  Sebastopol, CA
• 08/2024 → 04/2025
  Outlier Ai
  Grass Valley, CA
• 07/2026 → Present
  Abacus Wealth Partners, Llc
  Sebastopol, CA

Previous Registrations

• 2025-12-03 → 2026-07-09
  Ubs Financial Services Inc.
  San Francisco, CA
  Weehawken, NJ
  Weehawken, NJ

Exams

• S66 Uniform Combined State Law Examination
  2025-09-18