AdFi
SI

SOVEREIGN INVESTMENT ADVISORS LLC

SEC Registered

INVESTING IN INDIAN COUNTRY

PHOENIX, AZhttps://sovereigninvestmentadvisors.com480-385-2850
Assets Under Management
$1B–$5B
Employees
8
Office Locations
1 office
Total Accounts
144

About the firm

Sovereign Investment Advisors (SIA) is a 100% Native-owned, independent fiduciary investment advisory firm with decades of experience serving tribal governments, tribal entities, and nonprofits with a stated tribal mission. SIA is not a bank or national brokerage firm, but rather focuses exclusively on the investment needs of Indian Country. The firm delivers institutional investment expertise through a 100% Native-owned platform, without selling products or earning commissions.

Firm Focus

Client segments reported on the firm's SEC Form ADV — applies to all advisors at the firm.

High Net WorthPension/Profit SharingCharitable OrganizationsState/Municipal

Areas of expertise

Tribal Government InvestingFiduciary AdvisoryNative-ownedIndian CountryMinors' TrustsSettlement FundsRetirement PlansOst/btfa FundsNonprofit Investment ManagementInstitutional Portfolio ManagementAsset Allocation+1 more

Services

Asset allocation and investment policy development, investment manager selection and monitoring, portfolio reporting and performance analysis, minors' trust solutions, settlement fund management, CEFEX-certified retirement plan programs, and assistance removing assets from Federal constraints (OST/BTFA funds)

Who they serve

Tribal governments, tribal entities, minors' trust beneficiaries, settlement funds holders, tribal employees with retirement plans, tribes with OST/BTFA funds, and Native-based nonprofit organizations

Client segmentClientsAssets managed
Individuals (Non-HNW)4$1.7M
Charitable Organizations4$53M

0 total clients reported on Form ADV.

Leadership

Sovereign Finance Llc
SOLE MEMBER
Jeffrey Michael Lamb
MANAGING MEMBER
April Dawn Lamb
DIRECTOR OF OPERATIONS
Jeffrey Michael Lamb
PRINCIPAL
Marguerite Amaral Tavares
CHIEF COMPLIANCE OFFICER

Office locations

1 office in 1 state
AZ
PHOENIXHQ

Advisors at this firm

6 advisors in the directory

Regulatory & compliance

CRD number
#149040
SEC Number
801-80942
Disciplinary History
No
Fee Model & Minimums
Model: AUM / Flat Fee
Minimum: $1,000,000 (waivable)
Asset tierAnnual rate
$1,000,000 to $15,000,0001.00%
$15,000,001 to $75,000,0000.50%
$75,000,001 to $120,000,0000.35%
$120,000,001 or higher0.20%

Data as of March 4, 2026 · Source: SEC IAPD & FINRA BrokerCheck

Contact Information

Editorial disclosure

This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. SOVEREIGN INVESTMENT ADVISORS LLC has not reviewed, approved, or endorsed this profile and is not responsible for its accuracy. Regulatory records change over time — always verify the current record directly on the SEC or FINRA websites before making any decision.

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