Insights

Complexity to Clarity Sullivan specializes in transforming complex, regulated, or technical industries into clear, customer-friendly brands, signaling opportunities to partner on messaging clarity, value proposition articulation, and decision-point marketing strategies for sectors like financial services, higher education, technology, and professional services.

Human‑Centered Branding With a focus on unveiling humanity behind complexity, there is potential to upsell services around customer journey optimization, brand storytelling at key decision moments, and performance-driven brand campaigns that convert during critical touchpoints.

Strength in Experience Established since 1990 and led by a woman-owned, WBENC-certified organization, Sullivan can leverage its 35 years of domain expertise to pursue long-term branding and marketing retainers with mid-market to enterprise clients seeking trusted, compliant, industry-specific solutions.

Tech Enablement Current tech stack includes analytics and collaboration tools (Alteryx, HubSpot Analytics, Tableau, Smartsheet, Slack, Google Workspace, Microsoft 365). This supports data-driven campaigns and could open cross-sell opportunities for marketing automation, analytics-driven insights, and integrated project workflows.

Financial Gateways With a revenue range of $500M to $1B and a diversified client base in financial services and professional services, Sullivan presents recurring business opportunities for expansion into high-value retainers, advisory branding, and performance marketing programs that scale with enterprise client needs.

Similar companies to Sullivan

Sullivan Tech Stack

Sullivan uses 8 technology products and services including Alteryx, HubSpot Analytics, Tableau, and more. Explore Sullivan's tech stack below.

Sullivan's Email Address Formats

Sullivan uses at least 3 email formats:
Sullivan Email FormatsExamplePercentage
FLast@sullivannyc.comJDoe@sullivannyc.com
98%
LastFir@sullivannyc.comDoeJoh@sullivannyc.com
1%
L.First@sullivannyc.comD.John@sullivannyc.com
1%

Frequently Asked Questions

What is Sullivan's phone number?

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You can contact Sullivan's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is Sullivan's stock symbol?

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Sullivan is a publicly traded company; the company's stock symbol is OSL.

What is Sullivan's official website and social media links?

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Sullivan's official website is sullivannyc.com and has social profiles on LinkedIn.

How much revenue does Sullivan generate?

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As of August 2026, Sullivan's annual revenue is estimated to be $500M - $1B.

What is Sullivan's SIC code and NAICS code?

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Sullivan's SIC code is 8742 - Management Consulting Services and NAICS code is 541613 - Marketing Consulting Services.

How many employees does Sullivan have currently?

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As of August 2026, Sullivan has approximately 372 employees across 5 continents, including North America, Europe and South America. Key team members include Ceo: B. O., President: L. S. and Owner: B. S. Explore Sullivan's employee directory with LeadIQ.

What industry does Sullivan belong to?

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Sullivan operates in the Advertising Services industry.

What technology does Sullivan use?

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Sullivan's tech stack includes Alteryx, HubSpot Analytics, Tableau, Sketch, Google Workspace, Microsoft 365, Smartsheet and Slack.

What is Sullivan's email format?

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Sullivan's email format typically follows the pattern of FLast@sullivannyc.com. Find more Sullivan email formats with LeadIQ.

When was Sullivan founded?

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Sullivan was founded in 1990.
Sullivan logo

Sullivan

Advertising ServicesNew York, United States201-500 Employees

Sullivan is a brand and marketing firm based in New York City, founded in 1990 by Barbara Apple Sullivan. It specializes in translating complex business models into brands that are easy to understand and relate to, with a focus on guiding customers at moments of decision within intricate ecosystems. The firm brings decades of experience across sectors such as financial services, higher education, technology, and professional services, and is woman-owned with WBENC certification.

In the Advertising Services landscape, Sullivan emphasizes brand work that supports customers at critical decision points rather than broad awareness campaigns. Located in New York City and operating as a mid-sized firm, it pursues engagements that require deep industry insight and tailored branding strategies for organizations navigating complexity.

Section iconCompany Overview

Phone number
SIC Code
8742 - Management Consulting Services
Stock Symbol
OSL
NAICS Code
541613 - Marketing Consulting Services
Founded
1990
Employees
201-500

Section iconFunding & Financials

  • $500M - $1B

    Sullivan's revenue is estimated to be in the range of $500M - $1B

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