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SEI Investments Management

SEC-registered adviser since 1985Oaks, PACRD 105146

$216.4B
AUM
112,646
Clients
See fees
Fee
226
Advisory staff

From Form ADV filed 1 September 2026 · data retrieved 15 October 2026SEC record

SEI Investments Management is an investment adviser headquartered in Oaks, Pennsylvania, and registered with the SEC since 1985. Its clients include investment companies, other individuals and pooled investment vehicles. High-net-worth individuals account for 2% of its regulatory assets under management.

Its services include financial planning, portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, portfolio management for institutions, pension consulting, selecting other managers, publishing newsletters, and educational seminars. Fee arrangements include a percentage of assets under management, fixed fees and performance-based fees. Simc Holding, LLC owns 75% or more of SEI Investments Management.

Clients

SEI Investments Management serves 112,646 clients, 110,959 of them other individuals. The average client has about $1.9 million with the firm, and high-net-worth clients hold 2% of its $216.4 billion in assets.

Regulatory assets by client type
  • Individuals110,959 clients22%
  • High-net-worth individuals726 clients2%
  • Investment companies1 clients47%
  • Pooled investment vehicles18 clients21%
  • Pension and profit-sharing plans343 clients4%
  • OtherBanking or thrift institutions, Charitable organizations, State or municipal government entities, Corporations and other businesses, Other4%
Show client breakdown
Individuals (other than HNW)
Clients
110,959
Regulatory AUM
$47,675,430,360
Share
22.0%
Avg. per client
$430K
High-net-worth individuals
Clients
726
Regulatory AUM
$5,003,266,974
Share
2.3%
Avg. per client
$6.89M
Banking or thrift institutions
Clients
93
Regulatory AUM
$935,523,565
Share
0.4%
Avg. per client
$10.1M
Investment companies
Clients
1
Regulatory AUM
$100,728,082,247
Share
46.5%
Avg. per client
$100.73B
Pooled investment vehicles
Clients
18
Regulatory AUM
$45,163,894,755
Share
20.9%
Avg. per client
$2.51B
Pension and profit-sharing plans
Clients
343
Regulatory AUM
$9,563,058,377
Share
4.4%
Avg. per client
$27.9M
Charitable organizations
Clients
465
Regulatory AUM
$3,870,929,831
Share
1.8%
Avg. per client
$8.32M
State or municipal government entities
Clients
4
Regulatory AUM
$2,625,000,000
Share
1.2%
Avg. per client
$656.3M
Corporations and other businesses
Clients
35
Regulatory AUM
$488,314,551
Share
0.2%
Avg. per client
$14.0M
Other
Clients
2
Regulatory AUM
$375,000,000
Share
0.2%
Avg. per client
$187.5M

Total

Clients
112,646
Regulatory AUM
$216,428,500,660
Share
100%
Avg. per client
$1.92M

What it does

SEI Investments Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, portfolio management for institutions, pension consulting, selecting other managers, publishing newsletters and educational seminars. It is paid through a percentage of assets, fixed fees and performance-based fees.

SEI Investments Management provided financial planning to 251–500 clients last fiscal year and advises 17 private funds.

97.9% of assets ($211.99B across 112,625 accounts) are managed with discretion; $4.44B across 2 accounts are not. $51.92B sits in a wrap fee program the firm both sponsors and manages. 1% of clients are outside the U.S., and 0 clients received advice without assets under management last fiscal year.

What the accounts hold

Separately managed account assets by class, year end
  • Stocks65%
  • Funds14%
    • Registered funds11%
    • Pooled vehicles3%
  • Bonds20%
    • Investment grade corporate bonds8%
    • U.S. government and agency bonds7%
    • State and local bonds5%

Filed values cover 99%. The neutral 1% gap has no reported category.

Custodians

SEI Investments Management’s client accounts are held mainly at SEI Private Trust, with 57% of managed assets. SEI Investments Management has custody of $3.69M for 85 clients.

Managed account assets by custodian
  • SEI Private TrustSEI Private Trust Company · Oaks, PA · $122.85B57%
  • All other custodians$93.57B43%

Ownership and leadership

Simc Holding, LLC owns 75% or more of SEI Investments Management.

Who owns the firm
SEI Investments Management Corp· the adviser

  • Simc Holding, LLC

    Control person · since December 2003

    Owns 75% or more of SEI Investments Management Corp

Leadership

  • Michael Peterson
    Senior Vice President
  • Nathan Shetty
    President
  • Jennifer Campisi
    Chief Compliance Officer
  • Timothy Barto
    General Counsel
  • Bradley Landis
    Board Member
  • Sean Simko
    Board Member
  • Mark Warner
    Treasurer/Controller

Staff

  • 434 employees
  • 226 in advisory functions
  • 117 state-registered reps
  • 91 broker-dealer reps
  • 25 soliciting firms

Fees

SEI Investments Management is paid through a percentage of assets under management, fixed fees (other than subscription fees) and performance-based fees.

SEI Investments Management’s fee rates are not included in this profile. Find its brochure on the SEC’s site.

Offices and registrations

Besides its headquarters, SEI Investments Management has 3 offices, with 3 listed addresses across 3 states.

Listed office addresses by state

Pennsylvania · 1 listed address

  • One Freedom Valley Drive, OaksHQ

Other business names

SEI Investments Management has reported 1 other business name to the SEC.

  • SEI Huntington Steele

Registration details

Legal name
SEI Investments Management Corp
Headquarters
One Freedom Valley Drive, Oaks, PA 19456
Phone
610-676-1000
Website
Not reported
SEC file
801-24593
Structure
Delaware corporation
Fiscal year end
December

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. See this firm's record on adviserinfo.sec.gov

Common questions

How many clients does SEI Investments Management have?

SEI Investments Management has 112,646 clients and manages $216.4 billion for them, as of September 2026. They include 110,959 other individuals, 726 high-net-worth individuals and 465 charitable organizations.

Source: Form ADV Part 1A, Items 5.D and 5.F, filed 1 September 2026

What services does SEI Investments Management offer?

SEI Investments Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled vehicles, portfolio management for institutions, pension consulting, selecting other managers, publishing newsletters and educational seminars.

Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file

Which custodians does SEI Investments Management use?

SEI Investments Management’s separately managed account assets are held at SEI Private Trust Company (Oaks, PA), with $122,854,584,280. Only custodians holding at least a tenth of those assets are named.

Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 1 September 2026

How many financial advisors does SEI Investments Management have?

SEI Investments Management has 117 investment adviser representatives registered with state securities authorities, out of 434 employees, and 226 perform investment advisory functions. 91 are registered representatives of a broker-dealer and 0 are licensed insurance agents.

Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file

What does SEI Investments Management invest in?

At the end of its last fiscal year, SEI Investments Management’s separately managed accounts held 65% exchange-traded equities, 11% registered funds (mutual funds, ETFs, BDCs), 8% investment grade corporate bonds, 7% U.S. government and agency bonds, 5% state and local bonds and 3% pooled vehicles (private funds and similar). It advises 17 private funds.

Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file

Who owns SEI Investments Management?

SEI Investments Management is owned through a holding company by SEI Investments Company. Its direct owner is Simc Holding, LLC (75% or more).

Source: Form ADV Part 1A, Schedules A and B, filed 1 September 2026

How does SEI Investments Management get paid?

SEI Investments Management is paid through a percentage of assets under management, fixed fees and performance-based fees. Its Form ADV lists no commissions among how it is paid.

Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file

Sources

  1. Form ADV Part 1A, amendment filed 1 September 2026. Items 1, 5, 9, 11 and Schedules A, B and D.
  2. IAPD firm record, CRD 105146.

Retrieved 15 October 2026. All are published by the SEC and may have been amended since.

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This profile is compiled from public regulatory filings and is provided for informational purposes only. Niva Wealth is not affiliated with SEI Investments Management Corp and makes no representation about the quality of its services. Figures reflect the filing dates shown and may have changed. Ownership percentages are the bands reported to the SEC, not exact figures.