Atty. Castor John Armesto

Atty. Castor John Armesto

Castor John Armesto is a lawyer practicing banking, corporate counseling, mergers & acquisitions and 2 other areas of law. Castor received a B.S. degree from Iowa State University in 2001, and has been licensed for 20 years.

St. Louis St. Louis 20 yrs experience 20 year
Call (314) 530-4033 Book Appointment

Profile Summary

About Castor John Armesto at a glance

Castor John Armesto is a Partner based in St. Louis, Missouri, practicing at Stinson. They have 20+ years of legal experience, licensed to practice since 2006. Their practice focuses on business and m&a. Admitted to practice in Missouri (2006), Illinois (2007), and Iowa (2008). Educated at Washington University (J.D., 2006) and Iowa State University (B.S. Computer, 2001). Serands clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Castor John Armesto is a lawyer practicing banking, corporate counseling, mergers & acquisitions and 2 other areas of law
  • Castor received a B.S. degree from Iowa State University in 2001, and has been licensed for 20 years
  • Castor practices at Stinson in St. Louis, MO

Practice Areas Explained

Castor John Armesto's Areas of Practice

Each practice area below reflects the types of cases Castor John Armesto 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.

Castor John Armesto is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Missouri →

Mergers & Acquisitions

Castor John Armesto is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Missouri →

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Louis are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri 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 Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about Castor John Armesto

Where is Castor John Armesto's law office located?
Castor John Armesto's law practice is located in St. Louis, Missouri. The firm is Stinson. You can contact the office directly through this profile page.
What practice areas does Castor John Armesto handle?
Castor John Armesto focuses on business, m&a. Each practice area listed reflects experience handling cases of that type in Missouri.
How long has Castor John Armesto practiced law?
Castor John Armesto has 20+ years of legal experience and has been licensed since 2006.
Where did Castor John Armesto go to law school?
Castor John Armesto earned their education at (J.D., 2006); (B.S. Computer, 2001).
How can I contact Castor John Armesto for a consultation?
You can contact Castor John Armesto 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.

Education

J.D.
Washington University
- 2006
B.S. Computer
Iowa State University
- 2001

Bar Admissions

Missouri
Admitted: 2006
Illinois
Admitted: 2007
Iowa
Admitted: 2008

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