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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%Nov 2024Jan 2025May 2025Jul 2025Sep 2025Nov 2025Jan 2026Mar 2026May 2026Jul 2026Sep 2026Oct 2026UnitedHealth GroupHumanaCentene Corp.CVS Health (Aetna)Other plans
UnitedHealth GroupHumanaCentene Corp.CVS Health (Aetna)Other plans
Market Share by Parent Organization
ProviderOct 2026 ShareSep 2026 ShareOct 2025 ShareOct 2024 ShareOct 2021 ShareShare Δvs Oct 2021
UnitedHealth Group21.14%21.17%23.36%23.14%22.80%-1.66 pp
Humana17.94%17.93%13.76%14.54%16.33%+1.61 pp
Centene Corp.16.02%15.99%15.26%13.85%10.25%+5.77 pp
CVS Health (Aetna)13.00%13.02%14.01%16.18%16.69%-3.69 pp
Health Care Service Corp.5.96%5.95%7.33%0.88%0.75%+5.21 pp
Elevance Health (Anthem)3.62%3.62%4.52%4.27%0.00%+3.62 pp
Kaiser Permanente3.43%3.43%3.38%3.34%3.43%+0.01 pp
Blue Cross Blue Shield (assoc.)1.43%1.43%1.50%1.36%0.00%+1.43 pp
Devoted Health0.88%0.86%0.35%0.42%0.08%+0.79 pp
SCAN Group0.75%0.75%0.53%0.48%0.42%+0.33 pp
Highmark Health0.72%0.72%0.86%0.78%0.65%+0.07 pp
Healthfirst0.61%0.60%0.61%0.53%0.42%+0.19 pp
Guidewell (Florida Blue)0.50%0.50%0.54%0.66%0.47%+0.03 pp
Alignment Healthcare0.49%0.48%0.39%0.32%0.17%+0.32 pp
Molina Healthcare0.36%0.36%0.45%0.43%0.27%+0.09 pp
Clover Health0.26%0.26%0.19%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.