Atty. William Edward Tanis

Atty. William Edward Tanis

William Edward Tanis is a lawyer practicing corporate law, partnership law, securities and 2 other areas of law. William received a A.B. degree from Dartmouth College in 1971, and has been licensed for 50 years.

Denver Denver 50 yrs experience 50 year
Call (983) 203-7291 Book Appointment

Profile Summary

About William Edward Tanis at a glance

William Edward Tanis is a Director based in Denver, Colorado, practicing at Ireland Stapleton Pryor & Pascoe, PC. They have 50+ years of legal experience, licensed to practice since 1976. Their practice focuses on business, securities, and energy. Admitted to practice in Colorado (1976). Educated at Harvard University (J.D., 1976) and Dartmouth College (A.B. London, 1971). Recognitions include AV Preeminent. Active member of The Colorado Bar Association (Member, Ethics Committee) American Law Institute. Serands clients in Denver, CO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Edward Tanis is a lawyer practicing corporate law, partnership law, securities and 2 other areas of law
  • William received a A.B. degree from Dartmouth College in 1971, and has been licensed for 50 years
  • William practices at Ireland Stapleton Pryor & Pascoe, PC in Denver, CO

Practice Areas Explained

William Edward Tanis's Areas of Practice

Each practice area below reflects the types of cases William Edward Tanis handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

William Edward Tanis is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Colorado →

Securities Law

William Edward Tanis is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in Colorado →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

William Edward Tanis is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in Colorado →

Jurisdictional Context

Why local counsel matters in Colorado

Practicing law in Colorado. Legal matters in Colorado are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Denver are typically filed in the local municipal court or the appropriate Colorado state district court, depending on subject matter and amount in controversy. An attorney licensed in Colorado brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Colorado courts without local counsel or pro hac vice admission.

Looking for additional Colorado attorneys? Browse all attorneys in Denver or all attorneys in Colorado.

Frequently Asked

Common questions about William Edward Tanis

Where is William Edward Tanis's law office located?
William Edward Tanis's law practice is located in Denver, Colorado. The firm is Ireland Stapleton Pryor & Pascoe, PC. You can contact the office directly through this profile page.
What practice areas does William Edward Tanis handle?
William Edward Tanis focuses on business, securities, energy. Each practice area listed reflects experience handling cases of that type in Colorado.
How long has William Edward Tanis practiced law?
William Edward Tanis has 50+ years of legal experience and has been licensed since 1976.
Where did William Edward Tanis go to law school?
William Edward Tanis earned their education at (J.D., 1976); (A.B. London, 1971).
How can I contact William Edward Tanis for a consultation?
You can contact William Edward Tanis directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has William Edward Tanis received?
William Edward Tanis's notable recognition includes: AV Preeminent.

Education

J.D.
Harvard University
- 1976
A.B. London
Dartmouth College
- 1971

Awards

AV Preeminent

Bar Admissions

Colorado
Admitted: 1976

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