CMS · Medicare Advantage / Part D

Enrollment by Contract — Top Parent Organizations

Auto-aggregated from the CMS Monthly Enrollment by Contract release. Current-month enrollment with year-over-year net adds, year-over-year %, and year-to-date % alongside member-weighted Star Ratings, 24-month trend, and one-click stock lookups. Prior-month enrollment is listed as a reference column on the right. Tables sort and export to CSV.

Industry Enrollment

61,360,231

MoM +0.02% · +14,242

Year-over-Year

+4.5%

vs Jun 2025

Active CMS Contracts

965

Jun 2026

Top YoY Grower (Tracked)iRanked by absolute net adds year over year across the 16 tracked parent organizations. Both the absolute change (+ members) and % change vs the year-ago snapshot are shown. Providers must have at least 50,000 members in the prior year to qualify.

Humana

+2,881,187 · +35.5%

CMS Report: Enrollment by Contract Comparison

Trend window

	Current MonthJun 2026								Prior MonthMay 2026
Provider	EnrollmentJun 2026	YoY Net Addsvs Jun 2025	YoY % Changevs Jun 2025	YTD % Changevs Jan 2026	Trend24-mo	Overall★ 2026	Ticker	MoM Net Addsvs May 2026	EnrollmentMay 2026
#1UnitedHealth Group	13,066,837	-635,947	-4.6%	-1.3%		4.11★	UNH	-8,007	13,074,844
#2Humana	10,986,117	+2,881,187	+35.5%	+5.9%		3.80★	HUM	+57,810	10,928,307
#3Centene Corp.	9,751,297	+861,819	+9.7%	+1.7%		3.39★	CNC	-76,596	9,827,893
#4CVS Health (Aetna)	8,023,424	-253,809	-3.1%	-0.4%		4.20★	CVS	+3,522	8,019,902
#5Health Care Service Corp.	3,645,791	-621,739	-14.6%	+0.8%		3.63★	—	-1,229	3,647,020
#6Elevance Health (Anthem)	2,227,734	-455,500	-17.0%	-0.6%		3.90★	ELV	+1,628	2,226,106
#7Kaiser Permanente	2,107,371	+126,262	+6.4%	+5.1%		4.41★	—	+4,621	2,102,750
#8Blue Cross Blue Shield (assoc.)	893,732	-10,335	-1.1%	-2.3%		—	—	-4,071	897,803
#9Devoted Health	512,365	+297,854	+138.9%	+15.4%		4.24★	—	+11,446	500,919
#10SCAN Group	451,446	+145,488	+47.6%	+8.9%		4.01★	—	+3,507	447,939
Highmark Health	445,070	-58,366	-11.6%	+3.4%		4.38★	—	-179	445,249
Healthfirst	370,574	+16,977	+4.8%	+1.2%		4.45★	—	+1,075	369,499
Guidewell (Florida Blue)	307,881	-12,635	-3.9%	-0.5%		4.15★	—	-139	308,020
Alignment Healthcare	292,055	+69,960	+31.5%	+10.0%		4.15★	ALHC	+2,660	289,395
Molina Healthcare	224,288	-39,928	-15.1%	-4.6%		3.22★	MOH	-735	225,023
Clover Health	156,903	+51,129	+48.3%	+6.1%		3.51★	CLOV	+513	156,390
Industry total (all contracts)	61,360,231	+2,654,978	+4.5%	+1.9%				+14,242	61,345,989

How to read this: Each % Change and Net Adds column compares the enrollment column to its left against the next column to the right. The Trend column is a 24-month sparkline of the parent's total enrollment—green if today is above where they started, red if below. Star Ratings are 2026 Overall ratings, member-weighted across each parent's contracts. Use the trend window above to shorten the sparkline range. 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.