What is O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s NAICS code?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s NAICS code is 54111 (Offices of Lawyers).

Insights

Growth momentum The firm has been actively expanding its team with multiple attorney hires through 2024 and 2025, signaling ongoing growth and potential demand for services that support onboarding, practice integration, and firm operations as headcount rises.

Recognition leverage Recognition in Best Law Firms 2026 across 18 practice areas including Banking and Finance suggests a strong market reputation and client trust, presenting an opportunity to offer marketing, client relationship management, and thought leadership services to amplify brand impact.

Tech stack Adoption of WordPress, Shopify, Google Analytics, Microsoft 365 and e-commerce/payments tools indicates readiness for digital transformation, website optimization, client portals, and data analytics services to improve client acquisition and experience.

Revenue profile Estimated annual revenue in the mid five figures to low six figures range positions the firm as a mid-market legal player with potential needs for scalable financial planning, practice management software, and scalable IT/security solutions as it grows.

Diverse practice mix Full service offerings across business, tax, estate planning, family law, personal injury, and litigation create opportunities for cross-selling, integrated client solutions, and advisory services around firm operations, marketing alignment, and client lifecycle management.

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O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. Tech Stack

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. uses 8 technology products and services including UserWay, WordPress, Shopify, and more. Explore O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s tech stack below.

UserWay
Accessibility
WordPress
Content Management System
Shopify
E-commerce
Microsoft 365
Email
PayPal
Payment Processing
Venmo
Payment Processing
Adobe Creative Suite
Visualisation Software
Google Analytics
Web Analytics

Media & News

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s Email Address Formats

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. uses at least 4 email formats:

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. Email Formats	Example	Percentage
First.Last@wilaw.com	John.Doe@wilaw.com	76%
Last@wilaw.com	Doe@wilaw.com	21%
F.Last@wilaw.com	J.Doe@wilaw.com	2%
First.Middle@wilaw.com	John.Michael@wilaw.com	1%

Frequently Asked Questions

What is O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s phone number?

You can contact O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s main corporate office by phone at

+1-414-276-****

. 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 O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s official website and social media links?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s official website is wilaw.com and has social profiles on LinkedIn.

How much revenue does O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. generate?

As of August 2026, O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s annual revenue is estimated to be $25M - $50M.

What is O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s SIC code and NAICS code?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s SIC code is 8111 - Legal Services and NAICS code is 54111 - Offices of Lawyers.

How many employees does O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. have currently?

As of August 2026, O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. has approximately 92 employees across 2 continents, including North America and Europe. Key team members include Office Manager: J. S., Erisa/Employee Benefits & Compensation Attorney: K. K. and Accounts Payable: B. R. Explore O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s employee directory with LeadIQ.

What industry does O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. belong to?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. operates in the Law Practice industry.

What technology does O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. use?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s tech stack includes UserWay, WordPress, Shopify, Microsoft 365, PayPal, Venmo, Adobe Creative Suite and Google Analytics.

What is O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s email format?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.'s email format typically follows the pattern of First.Last@wilaw.com. Find more O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. email formats with LeadIQ.

When was O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. founded?

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. was founded in 1973.

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C.

Law PracticeWisconsin, United States51-200 Employees

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. is a Milwaukee-based law practice that provides practical legal guidance to businesses and their owners. The firm supports clients through all stages of the business life cycle, helping them start, grow, and transition their ventures, while also handling personal matters such as tax and estate planning, family law, and various forms of litigation, including personal injury. Its lawyers work in collaborative teams to analyze issues thoroughly and to pursue clients' goals with attentive, reliable service.

In 2026, the firm announced the addition of John 'Jack' McNally as a member of its Litigation and Trusts, Estates and Succession Planning Practice Groups.