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We report that HD 110067, the recently announced host star of a resonantsextuplet of transiting sub-Neptunes, is not a single star as claimed in thediscovery paper, but a wide hierarchical triple. The K0 V planet hosting star(V = 8.4 mag, d = 32 pc) has a companion at a wide projected separation of13400 au. This companion, namely HD 110106, is a slightly fainter (V = 8.8 mag)K3 V type 8-year period double-lined spectroscopic binary. The secondary inthis spectroscopic binary is contributing a significant amount of flux and hasa measured high mass ratio.

HD 110067 is a wide hierarchical triple system