H/Advisors – U.S.: Detailed Company Information & Corporate Profile
Summary
H/Advisors – U.S., founded in 1984, operates from its New York headquarters and serves the public‑relations sector with a staff of 100–200 professionals. The firm is an independent entity reporting annual revenues between ten and fifty million dollars.
Specializing in corporate public relations, mergers & acquisitions, shareholder activism, investor relations, initial public offerings, crisis management, alternative investment communications, board and C‑Suite advisory services, restructuring and bankruptcy, corporate communications, strategic communications, issue communications, communications advisory, litigation communications, cyber communications, transformation/change management, financial communications, profile raising, digital strategy, research & insights.
Carina Davidson is CEO, supported by Vice Presidents Isabelle Gwozdz, Amy Stevens, Marlies Dikkers, Blair Hennessy, Emma Prenn, and Mark. Managing Directors Tod Donhauser (San Francisco, U.S. Head of Public Affairs), Peter Duda (Head of Crisis), and Karina Byrne (Co‑Head of Litigation – U.S.) lead specialized practices, while President U.S. Sydney Isaacs oversees overall operations.
| H/Advisors – U.S. Website | abernathy.h-advisors.global |
| Social Links |  |
| Phone Number | 212.371.5999 |
| Industries | |
| H/Advisors – U.S. Headquarters Address | 230 Park Avenue, New York, NY, 10169 US |
| Company Size | 100-200 employees |
| Specialities & Services | Corporate Public Relations, Mergers & Acquisitions, Shareholder Activism, Investor Relations, Initial Public Offerings, Crisis Management, Alternative Investment Communications, Board and C-Suite Advisory Services, Restructuring and Bankruptcy, Corporate Communications, Strategic Communications, Issue Communications, Communications Advisory , Litigation Communications, Cyber Communications, Transformation / Change Management & Communications, Financial Communications, Profile Raising, Digital Strategy , Research & Insights |
| SIC Code | 7380 |
| DMA Code | Los Angeles Metropolitan Area |
| Founded | 1984 |
| Estimated Annual Revenue | $10M - 50M |
| Operating Status | Independent Company |
| Updated: | 2026-09-24 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 1923 | Public Company | 1.0K - 5.0K | |
| 1990 | Privately Held | 1-10 |
Estimated Website Traffic
The chart shows a growth in traffic to the h-advisors.global website. In September, traffic increased to 3176, compared to 2473 in the previous month. The highest traffic in 2026 was recorded in July, reaching 3934 visits.
Workforce Turnover
Number of employees switched from or switched to
Departmental sample breakdown
Length of Employment
H/Advisors – U.S.'s workforce includes employees across a wide range of tenure levels.
2% have been with the company for less than 1 year9% have been with the company for 1 to 2 years15% have been with the company for 3 to 4 years9% have been with the company for 5 to 7 years4% have been with the company for 8 to 10 years62% have been with the company for more than 11 years
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H/Advisors – U.S. Corporate Information: FAQ
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