Herringbone acquires leading agencies in strategic sub-verticals and runs them on a four-pillar model built for local services. The agencies compound together, sharpening each other as they grow. The result is a stack that delivers more value to clients than any single agency could on its own.
Eight operating companies. Conversations with additional founders ongoing.
Herringbone currently operates Hennessey Digital, BluShark Digital, and cj Advertising in legal, plus five additional category-defining firms operating in dental & orthodontic, home services, and elective medical, with names to be announced in the coming quarters. Each company retains its brand, its founder, and its culture.
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Elite Legal
Operating
Premium Legal
Operating
Full-Stack Legal
Operating
Specialty Orthodontics
Operating
Specialty Dental
Operating
General Practice Dental
Operating
Home Services
Operating
Elective Medical
Operating
Other
EvaluatingFour pillars. One operating model.
Each Herringbone company runs on the same four-pillar model. The pillars reinforce each other, strengthening every company on its own and the portfolio as a whole.
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Systems
The operating layer. Centralized finance and accounting, strategy, M&A, and shared talent infrastructure. The non-marketing capabilities that make a company more valuable the day it joins than the day before.
Intelligence
The intelligence layer. Proprietary AI tooling, predictive insight into local demand, and search and citation strategy across Google AI Overviews, ChatGPT, Claude, and Gemini.
Labs
The research layer. Continuous study of how local marketing is changing, the proprietary frameworks that apply relevant learnings, and the public work that carries them: research notes, podcasts, and thought leadership.
Growth
The outcomes layer. Shared accounts, routing, cross-sell, downsell, and referrals grow the portfolio in ways no single company could manage alone.
Systems, Intelligence, Labs, and Growth.
Running together as an engine.
We don't just own companies. We make them better.
Most platforms in this category are holding companies in disguise. They acquire, wait, and exit. Herringbone acquires, integrates, and compounds. The difference shows up in three places, and each is deliberate.
Centralized Capability
Systems, Intelligence, and Labs are funded centrally and deployed across every portfolio company. New acquisitions inherit the full system on day one—no rebuilds, consultants, or lengthy integrations.
Cross-Company Growth
Cross-sells, downsells, and referrals are the signals that distinguish operating platforms from traditional holding companies. Herringbone tracks these relationships as leading indicators of platform value.
Margin/EBITDA Expansion
Herringbone actively improves operations after acquisition, driving EBITDA margin expansion in the first year through centralized resources and operational standardization.
Why these verticals. Why these deals.
Herringbone enters a vertical only when four conditions are present: significant aggregate marketing spend, growth driven by customer acquisition, fragmentation at the operator level, and opportunity to acquire a category-defining firm.
Legal
Large fragmented market, hundreds of millions in annual spend, marketing-led acquisition.
Three category-defining firms: Hennessey (Elite), BluShark (Premium), cj Advertising (Full-Stack). Coverage from single-attorney firms to multi-state platforms.
Dental & Orthodontic
Large fragmented market, marketing-led acquisition, clear category leaders across sub-segments.
Three operating firms across specialty orthodontics, specialty dental, and general practice, names announcing. Coverage from owner-operator practices to DSO portfolios.
Elective Medical
Growing, premium-CPL markets across elective medical, marketing-led and fragmented at the practice level.
The category-defining firm in elective medical is operating in the portfolio, name announcing. Coverage will span single-doctor practices to multi-location groups.
Home Services
Large, fragmented trades across HVAC, roofing, and plumbing, where response time and marketing-led acquisition decide market position.
The category-defining firm in home services marketing is operating in the portfolio, name announcing. Coverage from local operators to private-equity-backed platforms.
Work with Herringbone
Two paths.
Both start with a conversation.
Herringbone works with two audiences directly. Founders considering their next chapter. Local services businesses looking for a marketing partner. Tell us where you are and someone from our team will reach out personally.
For Founders
Exploring a Sale
If you operate the category-defining company in a local services vertical and are thinking about your next chapter, we should talk. We have acquired eight companies since platform inception.
Explore Joining HerringboneFor Businesses
Hiring an Agency
Local services businesses seeking a marketing partner are routed to the Herringbone company best positioned to serve them. Each company operates independently under the pillars, with the platform’s research, AI, and operating leverage behind it.
Hire a Herringbone Firm