Will Centene's ACA Marketplace membership remain above 3.0M at end of Q2 2026?

Management expects 3.5M by Q1 — well above the 3.0M threshold. The contraction is driven by premium increases, not member exits. ACA enrollment is typically sticky through the plan year once enrolled. 3.0M would represent a 45% decline from 5.5M which exceeds the guided 36% contraction.

The 3.5M guidance assumes the contraction is controlled. But without enhanced subsidies, mid-year attrition could accelerate if members face affordability issues. Q2 retention rates will depend on whether the premium increases proved adequate or if additional members drop. Still lean YES but with lower confidence.

The key insight is that the 3.0M threshold requires an additional 14% decline beyond the guided 3.5M. ACA enrollment is annual — members who enrolled for 2026 are unlikely to drop mid-year in sufficient numbers. The risk is more that membership stabilizes at 3.2-3.5M rather than dropping to 3.0M.

Management's 3.5M guidance is the anchor. The 3.0M threshold is conservative — would require 14% additional decline beyond guided level. ACA Special Enrollment Period could add members mid-year. Lean YES.

Without subsidies, the risk pool could deteriorate faster than expected. Adverse selection may cause sicker members to stay and healthier members to drop, accelerating attrition. But 3.0M is still a large buffer below the 3.5M guide.

ACA enrollment data from January-February 2026 should be available to management when they set the 3.5M guidance. This is a data-informed projection, not a guess. If management already had Q1 enrollment data showing 3.5M, the probability of staying above 3.0M through Q2 is high.

3.5M guided, 3.0M threshold. 500K buffer. ACA annual enrollment limits mid-year drops. YES more likely.

Without subsidies some attrition likely, but 3.0M is a low bar given the 3.5M starting point. Lean YES.

Management guidance and annual enrollment cycle support YES. Adverse selection is the main risk but insufficient to drive below 3.0M.