Humana jumps 14.6% as 95% of its Medicare Advantage members land in 4-star plans for 2027, up from 20%

Humana shares were up 14.56% at $443.50 at 9:50 a.m. ET Friday, a gain of $56.38 from Thursday's close of about $387.12, according to Nasdaq quote data. That put the stock above its prior 52-week high of $428.88. The trigger was the federal government's 2027 Medicare Advantage Star Ratings, released late Thursday. Reuters reported that analysts called Humana the top beneficiary.

The number behind the jump

In its announcement, Humana said 95% of its Medicare Advantage members will be in plans rated 4.0 stars or higher for 2027, and 42% in plans rated 4.5 or higher. It holds six contracts at 4.5 stars and 12 at 4.0, eleven more at 4.0 or above than a year earlier, and its stand-alone drug plan contract earned 4.5 stars.

Reuters put the prior-year figure at 20%, so the share of members in 4-star-plus plans went up by 75 percentage points in one cycle. J.P. Morgan had expected 60% to 70%. Stars matter because plans rated 4 or above qualify for federal bonus payments, which the Reuters report described as worth billions of dollars. Evercore ISI analyst Elizabeth Anderson said Humana could receive $4.8 billion in bonus payments in 2028, crediting better drug-plan quality, health-plan quality and readmission measures. That is an analyst estimate, not a company figure.

Baird analysts cautioned that how much of the bonus reaches profit depends on how much Humana reinvests in member benefits and provider arrangements. Bonus money in this business usually flows back into richer plans, which is how insurers compete for enrollment.

The losers on the quality scorecard

The mirror image sits with the largest rivals. J.P. Morgan estimates UnitedHealth's share of members in 4-star-plus plans falls to about 67% from 81%, and CVS Health's to roughly 70% from 84%. Each is a drop of 14 points. Industry-wide, about 71% of Medicare Advantage drug-plan enrollees are in contracts rated 4 stars or higher, per the health department data Reuters cited.

The stock reaction has been uneven. At 9:51 a.m. ET, Nasdaq showed UnitedHealth up 3.44% at $383.70, Elevance up 3.34% and Centene up 3.30%, while CVS was up 0.17% at $87.95. The sector is rising with Humana, but the insurers whose scores slipped are not falling. Even at J.P. Morgan's estimates, most of their members remain in 4-star-plus plans, so they stay above the bonus line. We did not find a source explaining the reaction beyond that.

Who feels this first

Seniors choosing a plan. The Medicare Annual Election Period runs October 15 to December 7, with coverage starting January 1, per Humana's release. Star ratings are one input; as we reported, insurers are narrowing networks and dropping plans for 2027, and average premiums are projected lower. A rating tells you about quality measures, not whether your doctor is in network.

Independent practices and clinics. Star measures reward preventive care. Humana said its members completed 534,000 more annual preventive visits than the prior year and 93,000 more overdue colorectal screenings. Practices with Medicare Advantage patients are where those screenings and visits actually happen, and plans have a financial reason to keep that volume up.

Business owners who hold health stocks in a retirement account. A single-day 14.6% move in a large insurer reflects a revised forecast of bonus income years out. It is a reminder that this sector reprices on regulatory data releases, not on earnings alone. Per Evercore's estimate the money arrives in 2028, so this is a change in expected future income, not this quarter's.

What we could not verify

Sources disagree on the prior-year baseline: Reuters and Humana's own earlier disclosures point to 20% for 2026, while another outlet compared with 25% for 2025. We use Reuters' 20%. We did not read the full CMS data tables, so contract-level scores come from Humana's announcement. Pre-market and early trading prices move quickly.

Sources: Humana announcement via StockTitan/Business Wire; Reuters via Investing.com; Nasdaq quote data (9:50-9:51 a.m. ET, October 9, 2026); Chronicle reporting. Percentage-point arithmetic is the Chronicle's. This is market information, not investment advice.