Asset manager · Santa FE, NM
Thornburg Investment Management Inc
SEC-registered investment adviser · CRD 106357 · SEC 801-17853
At a glance
Thornburg Investment Management Inc is an SEC-registered investment adviser based in Santa FE, New Mexico, with $54.5 billion in regulatory assets under management as of its Form ADV filed March 27, 2026. Its largest client group by assets is investment companies, and it reports 487 individual clients. By Form ADV it is a asset manager, ranked 197th of 3,218 asset managers and 404th of 17,210 SEC-registered advisers by assets.
Main office 505-467-7283thornburg.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $54B
- Rank among asset managers
- #197 of 3,218
- Rank among all SEC RIAs
- #404 of 17,210
- Rank in New Mexico
- #1 of 25
- Individual clients
- 487
- High-net-worth clients
- 187
- Accounts
- 635
- Discretionary
- 100% of AUM
- Employees
- 219
- Advisory staff
- 40
- Offices
- 1
Owners and executives on its Form ADV
- Harold G. ThornburgChairman,director
- Brian J. McMahonVice Chairman, Director
- Nimish S. BhattChief Financial Officer and Treasurer
- Blair C. NaylorDirector
- Amy M. CallowGeneral Counsel and Secretary
- Robin R. KellerDirector
- Mark J. ZinkulaPresident, Chief Executive Officer, Director
- Brian T. BoydDirector
- Tanya KemosDirector
- Gladys XiquesChief Compliance Officer
Custody and brokerage
4 custodians
- Sumitomo Mitsui Trust (hong Kong) Limited$613M35%
- RBC$581M34%
- BNY Pershing$302M17%
- Charles Schwab$237M14%
Other RIAs using Sumitomo Mitsui Trust (hong Kong) LimitedOther multi-custodian RIAs
Broker-dealer
Hybrid RIA
Thornburg Investment Management Inc is a hybrid RIA: 66 of its employees are also registered representatives of a broker-dealer. It names affiliated broker-dealers: Thornburg Investment Management (asia) LTD and Thornburg Securities LLC.
- Thornburg Investment Management (asia) LTD
- Thornburg Securities LLC ↗CRD 14857
It doesn’t hold client accounts or customer funds itself. Its annual audited report filed with the SEC, February 2026
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Investment companies | 25 | $50B | 91% |
| Pooled investment vehicles | 35 | $2.5B | 5% |
| Individuals | 300 | $864M | 2% |
| Other | 22 | $782M | 1% |
| High-net-worth individuals | 187 | $386M | <1% |
| Corporations or other businesses | 52 | $339M | <1% |
| Other investment advisers | 6 | $43M | <1% |
| Charitable organizations | 8 | $5M | <1% |
Private funds
Thornburg Investment Management Inc reports 2 private funds with $53M in gross assets: real estate funds, other private funds (Form ADV Item 7.B).
Disciplinary disclosures
Thornburg Investment Management Inc answers yes to 1 disclosure item in Item 11 of Form ADV (criminal, regulatory or civil matters involving the firm or its advisory affiliates). Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for individuals and small businesses
- Portfolio management for investment companies
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
- Other services
How it’s paid
- A percentage of assets under management
Form ADV and brochures on the SEC’s adviser search ↗thornburg.com ↗
AtlasMembers
The full record on Thornburg Investment Management Inc
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, ten years of filings
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- Growth over one, three and five years
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- Rank against 297 peers of its type and size
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- Owners and executives, with titles and stakes
- 10 namedLocked
- Main office, fax and compliance officer
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- Filing changes this year, with alerts
- 1Locked
Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Thornburg Investment Management Inc manage?
Thornburg Investment Management Inc reports $54.5 billion in regulatory assets under management across 635 accounts, 100% of it on a discretionary basis, on its Form ADV filed March 27, 2026.
What kind of firm is Thornburg Investment Management Inc?
Thornburg Investment Management Inc is a asset manager by its Form ADV answers. Most of its assets are managed for funds, institutions or other businesses rather than individuals.
Who are Thornburg Investment Management Inc’s clients?
By assets, its largest client types are investment companies ($49.5 billion, 25 clients); pooled investment vehicles ($2.5 billion, 35 clients); individuals ($864 million, 300 clients).
Does Thornburg Investment Management Inc manage private funds?
Yes. It reports 2 private funds with $53 million in gross assets, including real estate funds, other private funds.
Does Thornburg Investment Management Inc have any disciplinary history?
Thornburg Investment Management Inc answers yes to 1 disclosure item in Item 11 of Form ADV, which covers criminal, regulatory and civil matters involving the firm or its advisory affiliates. The details are on the SEC’s adviser search.
Where these numbers come from
Every figure is Thornburg Investment Management Inc’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-27), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →