CMS · Medicare Advantage / Part D

Enrollment by Contract — Top Parent Organizations

Auto-aggregated from the CMS Monthly Enrollment by Contract release. Compare 5 reference periods with % and absolute net adds, member-weighted Star Ratings, and one-click stock lookups. Tables sort and export to CSV.
Enrollment: May 2026
State data: May 2026
Penetration: May 2026
Star Ratings: 2026
Generated: 2026-05-12 10:20 UTC
CMS source ↗
Industry Enrollment
61,345,989
MoM +0.2%
Year-over-Year
+4.7%
vs May 2025
Active CMS Contracts
970
May 2026
Top YoY Grower (Tracked)
Devoted Health
+132.5%
CMS Report: Enrollment by Contract Comparison
ProviderContract EnrollmentMay 2026% Changevs Apr 2026Net Addsvs Apr 2026Contract EnrollmentApr 2026% Changevs May 2025Net Addsvs May 2025Contract EnrollmentMay 2025% Changevs May 2024Net Addsvs May 2024Contract EnrollmentMay 2024% Changevs May 2021Net Addsvs May 2021Contract EnrollmentMay 2021Overall★ 2026Ticker
UnitedHealth Group13,074,844-0.2%-25,35113,100,195-3.9%-535,98113,636,176+2.4%+324,55813,311,618+13.3%+1,565,96511,745,6534.11★$UNH
Humana10,928,307+0.5%+57,07810,871,229+34.1%+2,765,7568,105,473-2.8%-232,7408,338,213-1.0%-81,2768,419,4893.80★$HUM
Centene Corp.9,827,893+0.3%+33,2979,794,596+10.2%+908,8628,885,734+15.8%+1,212,6457,673,089+45.6%+2,404,0765,269,0133.39★$CNC
CVS Health (Aetna)8,019,902+0.1%+5,1198,014,783-3.2%-268,7958,283,578-9.4%-863,6459,147,223+6.8%+578,5068,568,7174.20★$CVS
Health Care Service Corp.3,647,020+0.3%+9,4603,637,560-14.4%-613,3124,250,872+745.0%+3,747,804503,068+27.7%+108,972394,0963.63★
Elevance Health (Anthem)2,226,106-0.0%-2312,226,337-17.0%-455,6862,682,023+10.4%+252,3222,429,701+2,429,70103.90★$ELV
Kaiser Permanente2,102,750+0.2%+4,4942,098,256+6.1%+121,4101,976,846+3.8%+71,4961,905,350+8.8%+153,7941,751,5564.41★
Blue Cross Blue Shield (assoc.)897,803-0.4%-3,578901,381-0.8%-6,876908,257+11.8%+95,731812,526+812,5260
Devoted Health500,919+2.7%+12,981487,938+126.4%+272,452215,486-1.2%-2,508217,994+485.0%+180,72737,2674.23★
SCAN Group447,939+1.2%+5,468442,471+45.6%+138,488303,983+9.4%+26,158277,825+25.9%+57,152220,6734.01★
Highmark Health445,249-0.0%-76445,325-11.4%-57,462502,787+13.3%+58,864443,923+32.6%+109,161334,7624.38★
Healthfirst369,499+0.2%+761368,738+5.1%+17,842350,896+18.8%+55,561295,335+39.6%+83,737211,5984.45★
Guidewell (Florida Blue)308,020-0.1%-176308,196-4.0%-12,876321,072-15.7%-59,683380,755+59.3%+141,784238,9714.15★
Alignment Healthcare289,395+1.5%+4,243285,152+29.8%+65,435219,717+29.6%+50,196169,521+101.3%+85,31484,2074.15★$ALHC
Molina Healthcare225,023-1.5%-3,446228,469-12.6%-32,957261,426+2.0%+5,062256,364+98.6%+127,274129,0903.22★$MOH
Clover Health156,390+0.4%+594155,796+48.6%+50,975104,821+31.4%+25,03279,789+20.0%+13,29766,4923.51★$CLOV
Industry total (all contracts)61,345,989+0.2%+121,42261,224,567+4.5%+2,628,56358,596,004+2.9%+1,665,51356,930,491+10.6%+5,470,94351,459,548
How to read this: Each % Change and Net Adds column compares the enrollment column to its left against the next column to the right. Star Ratings are 2026 Overall ratings, member-weighted across each parent's contracts. Click column headers to sort; type in the filter box to search. Values aggregate all CMS contracts whose Parent Organization field maps to the listed company. Contracts with enrollment ≤ 10 are masked by CMS (HIPAA) and contribute zero.