According to the invention, a polymerizable compound, a polymerizable composition, and a polymer that have a low melting point at a practical level, exhibit excellent solubility in a general-purpose solvent, can be produced at low cost, and can produce an optical film that exhibits excellent transparency, and achieves uniform conversion of polarized light over a wide wavelength band, and an optically anisotropic article can be provided. In formula (I), Y1 to Y8 are, —O—, —O—C(═O)—, —C(═O)—O—, etc., G1 and G2 are a divalent linear aliphatic group of 1-20 carbon atoms, Z1 and Z2 are an alkenyl group of 2-10 carbon atoms that is substituted with a halogen atom, or unsubstituted, Ax is an organic group of 2-30 carbon atoms that includes at least one aromatic ring, Ay is a hydrogen atom, an alkyl group of 1-20 carbon atoms, etc., A1 is a trivalent aromatic group, A2 and A3 are a substituted or unsubstituted divalent alicyclic hydrocarbon group of 3-30 carbon atoms, A4 and A5 are a divalent aromatic group of 6-30 carbon atoms, and Q1 is a hydrogen atom, or an alkyl group of 1-6 carbon atoms.