Insights

Specialized Legal Expertise EllisPenn & O'Connor's focus on IRS and state tax resolution positions it as a leader in the niche legal services market, offering tailored solutions for tax-related challenges that could benefit from expanded technological or legal service partnerships.

Mid-Sized Growth Potential With a revenue ranging from 10 to 25 million and a team of up to 50 employees, the company is in a growth phase that may require scalable technology, operational enhancements, or strategic consulting to support its expansion and deepen client relationships.

Industry Engagement As members of multiple professional organizations including NATP, NAEA, and the Pennsylvania Bar Association, the firm demonstrates strong industry involvement, presenting opportunities for targeted networking tools and solutions to enhance member engagement and professional development.

Technology Stack Insights Using platforms like WordPress, Google Workspace, and open-source server software, the firm may benefit from advanced cybersecurity, document management, or client portal services to optimize its digital infrastructure and improve client service delivery.

Competitive Positioning Operating in a competitive sector with larger firms such as Deloitte and KPMG, EllisPenn & O'Connor can leverage niche expertise and personalized legal services to differentiate itself, offering potential upsell or cross-sell opportunities in specialized legal and tax technology solutions.

Similar companies to Ellis Penn & O'Connor

Ellis Penn & O'Connor Tech Stack

Ellis Penn & O'Connor uses 8 technology products and services including WordPress, Open Graph, Google Workspace, and more. Explore Ellis Penn & O'Connor's tech stack below.

  • WordPress
    Content Management System
  • Open Graph
    Content Management System
  • Google Workspace
    Email
  • Clipboard.js
    Javascript Libraries
  • PHP
    Programming Languages
  • Creativ.eMail
    Web Platform Extensions
  • Apache
    Web Servers
  • Apache HTTP Server
    Web Servers

Media & News

Ellis Penn & O'Connor's Email Address Formats

Ellis Penn & O'Connor uses at least 1 format(s):
Ellis Penn & O'Connor Email FormatsExamplePercentage
First@ellispenn.comJohn@ellispenn.com
41%
Last@ellispenn.comDoe@ellispenn.com
9%
First@ellispenn.comJohn@ellispenn.com
41%
Last@ellispenn.comDoe@ellispenn.com
9%

Frequently Asked Questions

Where is Ellis Penn & O'Connor's headquarters located?

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Ellis Penn & O'Connor's main headquarters is located at 1518 Walnut Street Philadelphia, Pennsylvania 19104 United States. The company has employees across 1 continents, including North America.

What is Ellis Penn & O'Connor's official website and social media links?

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Ellis Penn & O'Connor's official website is ellispenn.com and has social profiles on LinkedIn.

What is Ellis Penn & O'Connor's SIC code NAICS code?

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Ellis Penn & O'Connor's SIC code is 8721 - Accounting, Auditing, and Bookkeeping Services NAICS code is 5411 - Legal Services.

How many employees does Ellis Penn & O'Connor have currently?

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As of December 2025, Ellis Penn & O'Connor has approximately 11 employees across 1 continents, including North America. Key team members include Managing Partner: D. M.Office Manager: E. G.Associate: D. T.. Explore Ellis Penn & O'Connor's employee directory with LeadIQ.

What industry does Ellis Penn & O'Connor belong to?

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Ellis Penn & O'Connor operates in the Legal Services industry.

What technology does Ellis Penn & O'Connor use?

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Ellis Penn & O'Connor's tech stack includes WordPressOpen GraphGoogle WorkspaceClipboard.jsPHPCreativ.eMailApacheApache HTTP Server.

What is Ellis Penn & O'Connor's email format?

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Ellis Penn & O'Connor's email format typically follows the pattern of First@ellispenn.com. Find more Ellis Penn & O'Connor email formats with LeadIQ.

Ellis Penn & O'Connor

Legal ServicesPennsylvania, United States11-50 Employees

EllisPenn & O'Connor, Inc. The Nation’s Top IRS and State Tax Specialist. We are Members of the National Association of Tax Professionals (NATP), Pennsylvania Bar Association, and the National Association of Enrolled Agents (NAEA). We are the only National Tax Resolution Firm with a State Tax Department with highly trained professionals!

Section iconCompany Overview

Headquarters
1518 Walnut Street Philadelphia, Pennsylvania 19104 United States
SIC Code
8721 - Accounting, Auditing, and Bookkeeping Services
NAICS Code
5411 - Legal Services
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $10M$25M

    Ellis Penn & O'Connor's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    Ellis Penn & O'Connor's revenue is estimated to be in the range of $10M$25M

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