Top 20 HSA Market Concentration – 2025 Midyear Update
November 4, 2025
Research
Using data from our 2025 Midyear HSA Research Report, we measured HSA market concentration using the Herfindahl-Hirschman Index (HHI) and found it increased 8% to 1,409 from 1,302 a year ago. This growth was driven primarily by strong equity market performance, which boosted investment asset values, along with continued organic account growth among the largest […]
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