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Rainier Investment Management LLC

Seattle, WASEC-registered investment adviserCRD 105556

Filed as RAINIER INVESTMENT MANAGEMENT LLC

Rainier Investment Management LLC is an SEC-registered investment advisory firm in Seattle, WA, registered since 1989, reporting $500 million to $1 billion in regulatory assets under management in its Form ADV filing dated June 23, 2026.

36 years
registered since 1989
$581,139,481
assets under management
1 arrangement
Percentage of assets
None
disclosure items (Item 11)

Quick answers

From the filing

How is Rainier Investment Management LLC compensated?

On its Form ADV (Item 5.E, October 2026), Rainier Investment Management LLC reports these compensation arrangements: a percentage of assets under its management. The amounts are in Item 5 of its Form ADV Part 2A brochure.

Where is Rainier Investment Management LLC located?

Rainier Investment Management LLC's principal office is in Seattle, WA, according to its Form ADV; the July 2026 filing also lists 3 other offices (Schedule D, Section 1.F).

Is Rainier Investment Management LLC registered with the SEC or a state?

Rainier Investment Management LLC is an SEC-registered investment advisory firm, registered since 1989. Status as filed: Approved. CRD 105556.

How much does Rainier Investment Management LLC manage?

Rainier Investment Management LLC reports $581,139,481 in regulatory assets under management in its Form ADV filing dated June 23, 2026 (100% discretionary).

How have Rainier Investment Management LLC's assets and staff changed since 2021?

In the Form ADV data for Rainier Investment Management LLC: Regulatory assets under management: $1,081,859,397 in the October 2021 data and $581,139,481 in the October 2026 data, down 46%. Total employees: 3 in October 2021 and 3 in October 2026. Assets under management move with markets as well as with clients coming and going.

What types of clients does Rainier Investment Management LLC serve?

By number of clients on Form ADV Item 5.D: pooled investment vehicles (other than investment companies and business development companies) (2); investment companies (1); corporations or other businesses not listed above (1).

Which custodians does Rainier Investment Management LLC use?

Rainier Investment Management LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists BANKING/CUSTODY as a custodian holding 10% or more of its separately managed account assets.

Does Rainier Investment Management LLC report any disciplinary disclosures?

Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/105556

What changed in Rainier Investment Management LLC's recent Form ADV filings?

In the July 2026 filing data: Updated its list of owners and control persons (Schedule A).

From the Form ADV filing

Every figure below is as the firm filed it with regulators, as of October 2026.

How the firm is compensated

Item 5.E
  • A percentage of assets under your management

Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ

Fees and minimums

Form ADV Part 2A

See the firm's brochure (dated March 27, 2026) for its fees and any account minimum, on the SEC's IAPD site.

Regulatory assets under management

Item 5.F
$581,139,481

$581,139,481 as of October 2026, filing dated June 23, 2026.

Discretionary: $581,139,481.Non-discretionary: $0.

A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means

Who the firm serves

Item 5.D
Individuals (other than high net worth individuals)
Clients 0 Assets Not reported
High net worth individuals
Clients 0 Assets Not reported
Banking or thrift institutions
Clients 0 Assets Not reported
Investment companies
Clients 1 Assets $355,619,556 (61%)
Business development companies
Clients 0 Assets Not reported
Pooled investment vehicles (other than investment companies and business development companies)
Clients 2 Assets $196,376,214 (34%)
Pension and profit sharing plans (but not the plan participants or government pension plans)
Clients 0 Assets Not reported
Charitable organizations
Clients 0 Assets Not reported
State or municipal government entities (including government pension plans)
Clients 0 Assets Not reported
Other investment advisers
Clients 0 Assets Not reported
Insurance companies
Clients 0 Assets Not reported
Sovereign wealth funds and foreign official institutions
Clients 0 Assets Not reported
Corporations or other businesses not listed above
Clients 1 Assets $29,143,711 (5%)
Other
Clients 0 Assets Not reported

A firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.

Advisory services

Item 5.G
  • Portfolio management for investment companies (and business development companies)
  • Portfolio management for pooled investment vehicles (other than investment companies)
  • Portfolio management for businesses (other than small businesses) or institutional clients

Registration and firm details

Items 1, 2, 5
Registration
SEC-registered investment adviser. Status as filed: Approved.
Registered since
1989 (36 years)
Employees
Total: 3. Performing investment advisory functions: 3.
Wrap fee program participation
No.
Custodians (Schedule D, Section 5.K(3))

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

Other offices (Schedule D, Section 1.F)
3 other offices, as of the July 2026 filing
Dublin, OHFairport, NYSt. Petersburg, FL
States registered or notice-filed
1 state or jurisdiction
WA

SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration

Disclosures

Item 11

None Reports no disclosure items on Form ADV Item 11. View on IAPD.

Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures

Assets and staff over time

Items 5.A, 5.F
$1.08B 2021 $1.27B 2022 $930M 2023 $840M 2024 $617M 2025 $581M 2026
Data periodAssets under managementEmployeesFiling dated
October 2026$581,139,4813June 23, 2026
October 2025$616,990,7764March 20, 2025
October 2024$840,282,8363March 13, 2024
October 2023$930,481,6433March 3, 2023
October 2022$1,269,490,1553April 22, 2022
October 2021$1,081,859,3973July 30, 2021

Regulatory assets under management: $1,081,859,397 in the October 2021 data and $581,139,481 in the October 2026 data, down 46%.

Total employees: 3 in October 2021 and 3 in October 2026.

As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.

Changes in the filing

Last 12 months
  1. July 2026
    • Updated its list of owners and control persons (Schedule A).
  2. April 2026
    • Employees performing advisory functions went from 4 to 3.
    • Updated its list of owners and control persons (Schedule A).
  3. November 2025
    • Updated its list of owners and control persons (Schedule A).

Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.

Websites listed on Form ADV

Item 1.I
am.manning-napier.commanning-napier.com

Source: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."

Cite this page

AdvisorCensus. Rainier Investment Management LLC (CRD 105556): Form ADV filing data as of October 2026.
https://advisorcensus.com/firm/rainier-investment-management-llc-seattle-wa-105556