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Industry Analysis

Market Share Over Time

Each provider's share of the total Medicare Advantage / Part D universe across the comparison periods. The final column shows the percentage-point change from the oldest column to the most recent — positive means the provider is gaining share, negative means they're losing it.
Market share over time — % of MA universe Trailing 24 months · Top 4 parents + “Other plans”
0%20%40%60%80%100%Jun 2024Aug 2024Oct 2024Dec 2024Apr 2025Jun 2025Aug 2025Oct 2025Dec 2025Feb 2026Apr 2026May 2026UnitedHealth GroupHumanaCentene Corp.CVS Health (Aetna)Other plans
UnitedHealth GroupHumanaCentene Corp.CVS Health (Aetna)Other plans
Market Share by Parent Organization
ProviderMay 2026 ShareApr 2026 ShareMay 2025 ShareMay 2024 ShareMay 2021 ShareShare Δvs May 2021
UnitedHealth Group21.31%21.40%23.27%23.38%22.83%-1.51 pp
Humana17.81%17.76%13.83%14.65%16.36%+1.45 pp
Centene Corp.16.02%16.00%15.16%13.48%10.24%+5.78 pp
CVS Health (Aetna)13.07%13.09%14.14%16.07%16.65%-3.58 pp
Health Care Service Corp.5.95%5.94%7.25%0.88%0.77%+5.18 pp
Elevance Health (Anthem)3.63%3.64%4.58%4.27%0.00%+3.63 pp
Kaiser Permanente3.43%3.43%3.37%3.35%3.40%+0.02 pp
Blue Cross Blue Shield (assoc.)1.46%1.47%1.55%1.43%0.00%+1.46 pp
Devoted Health0.82%0.80%0.37%0.38%0.07%+0.74 pp
SCAN Group0.73%0.72%0.52%0.49%0.43%+0.30 pp
Highmark Health0.73%0.73%0.86%0.78%0.65%+0.08 pp
Healthfirst0.60%0.60%0.60%0.52%0.41%+0.19 pp
Guidewell (Florida Blue)0.50%0.50%0.55%0.67%0.46%+0.04 pp
Alignment Healthcare0.47%0.47%0.37%0.30%0.16%+0.31 pp
Molina Healthcare0.37%0.37%0.45%0.45%0.25%+0.12 pp
Clover Health0.25%0.25%0.18%0.14%0.13%+0.13 pp
Share calculated as provider's total contract enrollment divided by the industry's total contract enrollment for the same month. "pp" = percentage points.