ABA‐type oligocarbonate‐fluorene end‐functionalized poly(ethylene glycol) s form micelles with star‐like correlations in dilute solutions where water solvates the middle (B) poly(ethylene oxide) block. Using small‐angle neutron scattering (SANS), the star‐arm aggregation number and arm radius of gyration were characterized by Benoit's star‐polymer form factor under θ‐solvent conditions and by Alessandrini and Cargnano's renormalization group theory in good solvent. Model‐independent SANS Zimm plots provide the radius of gyration, micelle aggregation number, and second virial coefficient (A2) as a function of temperature. In comparison to unfunctionalized poly(ethylene glycol) A2 is consistent with predictions for self‐assembling polymers below the gelation point with a theta temperature of ≈ 75 °C.