Independent list · re-checked September 28, 2026 · published by Primortul LLC

marketing agencies in Missouri

2 of the 13 marketing agencies on this list are based in Missouri (MO), in Kansas City, St. Louis. The other 11 are based elsewhere on the list. Who leads them, the work they can show, and why each one made the list. This is the list, not a ranking of the state. Nobody pays to be ranked.

  1. 01 on the list · Kansas City, MO

    BarkleyOKRP

    Since 1964 · 500+ people

    BarkleyOKRP is an independent advertising agency formed in 2024 when Kansas City's Barkley (founded 1964) merged with Chicago's OKRP. It has more than 600 staff, an in-house production unit called The Bananary and a media arm, MissionOne Media, with $1.1 billion in billings. The agency is a certified B Corp and describes itself as holding-company free.

    Why it’s hereThe largest independent agency in Kansas City, with 600+ staff and national accounts such as Burger King and Macy's.

    Who leads itKaty Hornaday, CEO.

    Work they can showBurger King. Ran the Million Dollar Whopper promotion, an AI-assisted contest where fans designed their own Whopper for a $1 million prize. Red Lobster. Built a comeback campaign fronted by the chain's CEO, which the agency describes as Red Lobster's biggest launch ever. Frontier Airlines. Created the brand campaign built around a 30-year-old customer promise.

    Estimated cost

    Estimated: $8,000–$25,000/mo, typical for Midwest marketing retainers; not a quote.

    Typical industry estimate, not a quote from any firm on this list.

    integrated campaigns · brand strategy · media · restaurant and retail · B Corp

  2. 09 on the list · St. Louis, MO

    HLK

    Since 1977

    HLK is a brand agency in St. Louis' Soulard area, independent since 1977 and owned by seven partners, with a second office in Denver. It works in complex, regulated categories such as agriculture, healthcare, energy and finance, delivering branding, campaigns and digital products for clients including Bayer, Ambetter and Marriott.

    Why it’s hereNearly 50 years independent, partner-owned, with enterprise agriculture and healthcare accounts such as Bayer and Centene.

    Who leads itEric Karlovic, Chief Executive Officer.

    Work they can showPivot Bio. Named marketing and product brand PR agency of record in June 2025 to lead strategy, creative and demand generation ahead of three product launches in 2026. Sentry. Named brand and media agency of record for the mutual insurance company.

    Estimated cost

    Estimated: $8,000–$25,000/mo, typical for Midwest marketing retainers; not a quote.

    Typical industry estimate, not a quote from any firm on this list.

    brand strategy · agriculture · healthcare · digital · campaigns

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