Firm profile

Inatai Investment Management Co.. LLC

SEATTLE, WACRD 329696Registration Status: ApprovedEffective since March 6, 2024SEC # 801-129651Latest ADV May 11, 2026

Inatai Investment Management Co. LLC is an SEC registered investment adviser organized as a limited liability company with a primary office location in Seattle, WA.

Assets Under Management
$2.7B
Employees
8
Offices
1 office
Total Clients
<5

Associated firm names

1 name listed
  • INATAI INVESTMENT MANAGEMENT CO. LLC

Leadership

3 roles identified
CEOPeng Wang
CCOWalter R. Costenbader
CIOPeng Wang

Advisory services offered

1 types reported
Portfolio management for pooled investment vehicles

Fee models offered

1 types reported
Asset based fees

Offices & Contact

Primary office

SEATTLE, Washington, United States

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Primary office regionOther reported regions

Shading shows states and countries with reported offices. Cities are listed below; shading does not indicate service coverage.

Washington

SEATTLEPrimary office

1 office records listed · 1 total offices reported. Counts can use different reporting dates. SEC filers may list only their largest 25 additional offices.

Contact and digital presence

ADV profile links

Regulatory Assets Under Management Breakdown

Total regulatory assets under management$2.7Bas of May 11, 2026
Discretionary100.0%
$2.7B
100% of total RAUM100.0%
Non-discretionary0.0%
$0
0% of total RAUM0.0%
All regulatory assets under management are discretionary.

Client Coverage Demographics

Top client segmentPooled Investment Vehicles represent 100.0% of total clients.
Top client categories% of clientsClients
1
Pooled Investment Vehicles
100.0%
3

Assets under management Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total AUM$2.7B
Total Accounts3
10Y AUM Change+$505M (+23.1%)

Private Funds

Private funds reported by Inatai Investment Management Co.. LLC

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Employee Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total Employees8
Clients per Employee0:1
10Y Employee Change-1 (-11.1%)

Historical AUM and employee figures reflect available SEC Form ADV filings under this CRD. Filing gaps may reflect registration status changes, dormant periods, state registration periods, firm restructuring, or other reporting changes. Rialytix does not interpolate missing periods.


Ownership

Reported direct and indirect ownership ranges

Each range applies to a separate reported relationship and should not be added together.

Reported ownership ranges

Highlighted bands show the percentage range reported in Form ADV.

0%25%50%75%100%
INATAI FOUNDATIONDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
75%+
NICHOLE JUNE MAHERDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%
CARA CHIEMI NAKAMURADirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%
DAVID (NMN) NIERENBERGDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%
MARISA NICOLE GRANTDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%
BENJAMIN NMN DANIELSONDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%
MUTHUKKARUPPAN MUTHIAHDirect owner · Schedule AInterest in INATAI INVESTMENT MANAGEMENT CO. LLC
< 5%

Bars represent the reported range at that individual ownership step, not an estimated percentage of the advisory firm. Indirect relationships may refer to intermediate entities rather than directly to Inatai Investment Management Co.. LLC.

No indirect ownership information reported in the source’s Schedule B.

Reported ownership and control details

Form ADV · Filing date 2026-05-11 · Schedules A and B

11 entries
#Owner / person & roleInterest in entityReported interestControl personTitle / status acquiredSource
1INATAI FOUNDATIONMANAGING MEMBERDomestic entityINATAI INVESTMENT MANAGEMENT CO. LLC75% or moreCode EYesMANAGING MEMBER10/2022Schedule APDF page 31
2PENG (NMN) WANGCHIEF INVESTMENT OFFICER / CHIEF EXECUTIVE OFFICERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NAYesCHIEF INVESTMENT OFFICER / CHIEF EXECUTIVE OFFICER10/2022Schedule APDF page 31
3WALTER RUSSELL COSTENBADERCHIEF COMPLIANCE OFFICERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoCHIEF COMPLIANCE OFFICER02/2024Schedule APDF page 31
4JULIANNE CHRISTIE REILLYIMCO BOARD SECRETARYIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoIMCO BOARD SECRETARY11/2023Schedule APDF page 31
5PETER HENRY VAN OPPENBOARD CHAIRIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD CHAIR10/2022Schedule APDF page 31
6NICHOLE JUNE MAHERBOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD MEMBER10/2022Schedule APDF page 31
7CARA CHIEMI NAKAMURABOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD MEMBER10/2022Schedule APDF page 31
8DAVID (NMN) NIERENBERGBOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD MEMBER10/2022Schedule APDF page 32
9MARISA NICOLE GRANTBOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD MEMBER03/2024Schedule APDF page 32
10BENJAMIN NMN DANIELSONBOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NANoBOARD MEMBER03/2025Schedule APDF page 32
11MUTHUKKARUPPAN MUTHIAHBOARD MEMBERIndividualINATAI INVESTMENT MANAGEMENT CO. LLCLess than 5%Code NAYesBOARD MEMBER03/2026Schedule APDF page 32

Less than 5% may include zero. Code F identifies a role without specifying a percentage. Reported interests may overlap and may not include every owner. Total indirect ownership is not calculated.

Compliance & Disclosures

Filing dated 5/11/2026 7:03:12 PM

Responses were selected by the RIA in its filing. Questions are shortened for readability; “you” refers to the reporting firm, and some questions also cover advisory affiliates.

RIA or supervised-person involvementThe RIA reported that none of the events below involve the firm or its supervised persons.RIA responseNo
AFelonies2 No

In the past ten years, have you or any advisory affiliate:

  • A1Been convicted of or pleaded guilty or no contest to a felony?No
  • A2Been charged with a felony?No
BMisdemeanors2 No

In the past ten years, have you or any advisory affiliate:

  • B1Been convicted of or pleaded guilty or no contest to a misdemeanor involving investments, an investment-related business, fraud, false statements or omissions, wrongful taking of property, bribery, perjury, forgery, counterfeiting, or extortion?No
  • B2Been charged with a misdemeanor of the kind listed above?No
CSEC or CFTC actions5 No

Has the SEC or CFTC ever:

  • C1Found you or an advisory affiliate made a false statement or omission?No
  • C2Found you or an advisory affiliate violated SEC or CFTC regulations or statutes?No
  • C3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • C4Entered an order against you or an advisory affiliate in connection with investment-related activity?No
  • C5Imposed a civil money penalty on you or an advisory affiliate, or ordered you or an advisory affiliate to cease and desist from any activity?No
DOther regulatory actions5 No

Has any other federal regulatory agency, state regulatory agency, or foreign financial regulatory authority ever:

  • D1Found you or an advisory affiliate made a false statement or omission, or was dishonest, unfair, or unethical?No
  • D2Found you or an advisory affiliate violated investment-related regulations or statutes?No
  • D3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • D4In the past ten years, entered an order against you or an advisory affiliate in connection with investment-related activity?No
  • D5Denied, suspended, or revoked your or an advisory affiliate’s registration or license, or otherwise prevented association with an investment-related business or restricted activities?No
ESelf-regulatory organization actions4 No

Has a self-regulatory organization or commodities exchange ever:

  • E1Found you or an advisory affiliate made a false statement or omission?No
  • E2Found you or an advisory affiliate violated its rules, other than a violation designated as a minor rule violation under an SEC-approved plan?No
  • E3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • E4Disciplined you or an advisory affiliate by expulsion, suspension, barring association with other members, or otherwise restricting activities?No
FProfessional authorizations1 No
  • FHas an authorization to act as an attorney, accountant, or federal contractor granted to you or an advisory affiliate ever been revoked or suspended?No
GPending regulatory proceedings1 No
  • GAre you or any advisory affiliate now the subject of a regulatory proceeding that could result in a “Yes” answer to any part of C, D, or E?No
HCivil judicial actions and proceedings4 No

(1) Court actions

Has a domestic or foreign court:

  • H(1)(a)In the past ten years, enjoined you or an advisory affiliate in connection with investment-related activity?No
  • H(1)(b)Found that you or an advisory affiliate violated investment-related statutes or regulations?No
  • H(1)(c)Dismissed, pursuant to a settlement agreement, an investment-related civil action brought against you or an advisory affiliate by a state or foreign financial regulatory authority?No

(2) Pending civil proceedings

  • H(2)Are you or any advisory affiliate now the subject of a civil proceeding that could result in a “Yes” answer to any part of H(1)?No

* Metrics are based on the latest available data, including Form ADV filings, brochures, and relationship summaries pulled from the SEC IAPD, and may be subject to change. Learn what is included in the Rialytix data. Please refer to the firm's official disclosures for the most accurate information using their CRD number. This is not investment advice.