AdvertisingMediaOMD retains US billings crown for 2023Kikelomo OyenugaJuly 9, 2024 by Kikelomo OyenugaJuly 9, 20240198 Omnicom’s OMD repeated as the top-billing media agency in the U.S. in 2023 with an estimated total of $9.6 billion (+4.6%) according to final figures...