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

61,631,392

MoM +0.26% · +157,945

Year-over-Year

+4.5%

vs Aug 2025

Active CMS Contracts

968

Aug 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

+2,932,871 · +36.1%

CMS Report: Enrollment by Contract Comparison

Trend window

	Current MonthAug 2026								Prior MonthJul 2026
Provider	EnrollmentAug 2026	YoY Net Addsvs Aug 2025	YoY % Changevs Aug 2025	YTD % Changevs Jan 2026	Trend24-mo	Overall★ 2026	Ticker	MoM Net Addsvs Jul 2026	EnrollmentJul 2026
#1UnitedHealth Group	13,070,964	-699,281	-5.1%	-1.3%		4.11★	UNH	+1,492	13,069,472
#2Humana	11,052,048	+2,932,871	+36.1%	+6.6%		3.81★	HUM	+37,430	11,014,618
#3Centene Corp.	9,833,615	+874,703	+9.8%	+2.6%		3.39★	CNC	+48,912	9,784,703
#4CVS Health (Aetna)	8,036,454	-249,242	-3.0%	-0.3%		4.20★	CVS	+11,609	8,024,845
#5Health Care Service Corp.	3,666,280	-633,174	-14.7%	+1.4%		3.63★	—	+12,185	3,654,095
#6Elevance Health (Anthem)	2,235,013	-446,871	-16.7%	-0.3%		3.90★	ELV	+3,368	2,231,645
#7Kaiser Permanente	2,116,198	+126,739	+6.4%	+5.6%		4.41★	—	+5,452	2,110,746
#8Blue Cross Blue Shield (assoc.)	888,322	-9,362	-1.0%	-2.9%		—	—	-2,461	890,783
#9Devoted Health	528,506	+318,240	+151.4%	+19.0%		4.25★	—	+7,319	521,187
#10SCAN Group	458,080	+149,003	+48.2%	+10.5%		4.01★	—	+3,953	454,127
Highmark Health	445,542	-60,626	-12.0%	+3.5%		4.38★	—	+453	445,089
Healthfirst	372,938	+13,603	+3.8%	+1.9%		4.45★	—	+1,004	371,934
Guidewell (Florida Blue)	308,470	-12,741	-4.0%	-0.3%		4.15★	—	+686	307,784
Alignment Healthcare	296,228	+70,046	+31.0%	+11.5%		4.15★	ALHC	+2,073	294,155
Molina Healthcare	223,617	-42,359	-15.9%	-4.9%		3.22★	MOH	+20	223,597
Clover Health	157,895	+50,465	+47.0%	+6.8%		3.51★	CLOV	+423	157,472
Industry total (all contracts)	61,631,392	+2,668,224	+4.5%	+2.3%				+157,945	61,473,447

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.