UnitedHealthcare (UNH) Stock: Slides Sharply as Medicare Advantage Cuts and Rising Medical Ratios Squeeze Profit

TLDR

• UNH stock tumbles as medical costs surge and margins weaken
• Medicare funding cuts and rising care costs hit UNH outlook
• UNH plunges after earnings reveal margin and cost pressures
• Higher medical use and funding shifts drag UNH shares lower
• UNH sinks as rising expenses and policy changes weigh on results

UnitedHealthcare (UNH) shares fell sharply after closing at $351.64 and then dropping further to $298.58 in pre-market trading. The decline followed new results that showed rising medical costs and weaker margins across several major business segments. UNH faced ongoing pressure from Medicare Advantage funding changes that continued to reshape its performance outlook.

UnitedHealth Group Incorporated, UNH

Medical Cost Trends Strain UNH Margin Performance

UNH reported higher medical costs that pushed its full year adjusted medical care ratio to 88.9% from 85.5% last year. The fourth quarter ratio exceeded 91% and showed the continued impact of elevated use trends. UNH noted that funding reductions and policy shifts added sustained expense pressure across core units.

The company reported $19.0 billion in earnings from operations for the year, but the total included a significant restructuring charge. The charge reached $2.8 billion and covered cyberattack costs, divestitures and several operational actions. Adjusted earnings from operations reached $21.7 billion and reflected ongoing business stability.

UNH also disclosed favorable reserve development of $140 million that partially offset rising care costs. Days claims payable declined to 44.1 due to timing changes connected to the Inflation Reduction Act. Sales outstanding improved slightly compared to last year and signaled continued cash discipline.

UNH Segment Results Shift as Medicare Advantage Pullback Accelerates

UNH recorded full year revenues of $344.9 billion in its UnitedHealthcare division, which marked 16% annual growth. Enrollment reached 49.8 million people and rose by 415,000 across several programs. Yet operating margin fell to 2.7% as funding changes and medical trends continued to pressure returns.

The Medicare and Retirement segment produced revenue growth of 23% due to expanded participation and Part D effects. Total Medicare Advantage growth reached 755,000 members during 2025 and supported premium gains. UNH confirmed enrollment will contract by more than 1.1 million members in 2026 as it exits selected markets.

Community and State revenue increased 17% because of growth in complex care programs and Medicaid rate changes. Enrollment declined by 55,000 as states advanced eligibility changes that reduced program counts. UNH emphasized stable performance across its core offerings despite shifting market conditions.

Optum Growth Continues but UNH Faces Turnaround Demands

Optum revenue climbed 8% in the fourth quarter to $70.3 billion and increased 7% for the full year. The segment reached $270.6 billion in annual revenue and maintained broad engagement across payers and providers. UNH highlighted progress on operational resets at Optum to improve near-term efficiency.

UNH produced $10 million in fourth quarter net income after absorbing a $1.6 billion restructuring impact. The charge covered cyberattack expenses, divestitures and real estate rationalization. The company strengthened disclosure practices and completed several independent reviews.

Full year revenue reached $447.6 billion, which represented 12% annual growth across all major operations. Cash flow from operations totaled $19.7 billion and exceeded internal expectations due to timing benefits. UNH continues to target a lower debt-to-capital ratio and expects improved financial positioning through 2026.

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