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Brian McMahon

Vice Chairman, Director at Thornburg Investment Management

No current adviser or broker registrationSEC record checked 17 October 2026

0
Past adviser firms
4
Licensing exams

IAPD record retrieved 17 October 2026SEC record

Brian McMahon is Vice Chairman, Director of Thornburg Investment Management Inc, a Santa Fe investment adviser managing $54.5B. Brian McMahon has passed the Series 7, Series 63, Series 24 and SIE.

Role at Thornburg Investment Management

Title on Schedule A
Vice Chairman, Director
Control
Brian Mcmahon is a control person of Thornburg Investment Management.
Ownership
An individual ownership band is not available in the source record.
Tenure
Brian Mcmahon has held the filed role since January 2016.

The firm

Thornburg Investment Management Inc
Santa Fe, NM

Form ADV filed 27 March 2026

$54.5B AUM635 clients40 advisers1 offices

Career on record

Firms and exams, newest first
  1. Passed SIE · 2018
  2. Passed Series 7, Series 63 and Series 24 · 1987

Registrations and exams

No current adviser or broker registration. Brian McMahon has passed 4 qualifying exams.

Examinations

Series 632 April 1987
Name
Uniform Securities Agent State Law Examination
Series 2430 October 1987
Name
General Securities Principal Examination
SIE1 October 2018
Name
Securities Industry Essentials Examination
Series 721 February 1987
Name
General Securities Representative Examination

Individual record

Full name
Brian John McMahon
CRD
1355122
Firm
Thornburg Investment Management Inc
Registration status
No current adviser or broker registration
Firm bio
thornburg.com

This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. Check this record on adviserinfo.sec.gov

Background

Thornburg identifies Brian McMahon as its vice chairman, chief investment strategist, portfolio manager and managing director. The page says he served as the firm’s chief investment officer from 1984 to 2019, president from 1997 to 2015, and CEO from 2008 to 2015. It says he holds an MBA from Tuck School of Business at Dartmouth College and a BA in economics and Russian studies from the University of Virginia. Official firm biography/team page

Education

  • He holds an MBA from Tuck School of Business at Dartmouth College and a BA in economics and Russian studies from the University of Virginia.Official firm biography/team page

Common questions

Where does Brian McMahon work?

Brian McMahon has been Vice Chairman, Director of Thornburg Investment Management Inc since January 2016, and is a control person of the firm.

Source: Form ADV, Schedule A, filed 27 March 2026

Does Brian McMahon have a current investment-adviser registration?

Brian McMahon has no current investment-adviser or broker registration, as of 17 October 2026.

Source: IAPD individual record, checked 17 October 2026

What exams has Brian McMahon passed?

Brian McMahon has passed 4 licensing exams: the Series 7, Series 63, Series 24 and SIE. The earliest, the Series 7, was passed in February 1987.

Source: IAPD individual record, checked 17 October 2026

Leadership at Thornburg Investment Management

Sources

  1. IAPD individual record, CRD 1355122. Registration status, employment history and examinations.
  2. Form ADV Part 1A, Schedules A and B of Thornburg Investment Management Inc, filed 27 March 2026. Title, control and ownership bands.
  3. Thornburg Investment Management team page. Biography, education, credentials, awards.

Retrieved 17 October 2026. The SEC record may have been amended since.

Report a correction

This profile is compiled from public regulatory records and the firm's own published materials, and is provided for informational purposes only. Niva Wealth is not affiliated with Brian McMahon or Thornburg Investment Management Inc and makes no representation about the quality of their services. This directory does not report disciplinary history, in either direction.