Firm profile

Sompo Asset Management Co.., Ltd..

TOKYO, JapanCRD 286479Registration Status: ApprovedEffective since May 24, 2017SEC # 801-110538Latest ADV June 12, 2026

Sompo Asset Management Co., Ltd. is an SEC registered investment adviser organized as a corporation with a primary office location in Tokyo, Japan. Its latest Form ADV filing, dated June 12, 2026, reports $25.4B in regulatory assets under management, 204 employees, 1 office, and 541 accounts.

Assets Under Management
$25.4B
Employees
204
Offices
1 office
Total Clients
541

Associated firm names

2 names listed
  • SOMPO ASSET MANAGEMENT CO., LTD.
  • SOMPO JAPAN NIPPONKOA ASSET MANAGEMENT CO., LTD.

Leadership

2 roles identified
CEOTsutomu N. Yamaguchi
CCOYoshihisa N. Sato

Advisory services offered

2 types reported
Portfolio management for businesses
Portfolio management for pooled investment vehicles

Fee models offered

2 types reported
Asset based fees
Performance-based fees

Offices & Contact

Primary office

TOKYO, Japan

Loading map…

Primary office regionOther reported regions

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

Japan

TOKYOPrimary 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$25.4Bas of June 12, 2026
Discretionary100.0%
$25.4B
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 54.5% of total clients.
Top client categories% of clientsClients
1
Pooled Investment Vehicles
54.5%
295
2
Pension Plans
40.7%
220
3
Corporations
2.4%
13
4
Insurance Cos.
1.5%
8
5
Other Advisers
0.6%
3
Categories with <5 clients
Banking or thrift institutions<5 clients

Assets under management Growth by Quarter

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

Total AUM$25.4B
Total Accounts541
10Y AUM Change$-5.4B (-17.4%)

Private Funds

Private funds reported by Sompo Asset Management Co.., Ltd..

Loading private fund disclosures…

Employee Growth by Quarter

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

Total Employees204
Clients per Employee3:1
10Y Employee Change+45 (+28.3%)

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%
SOMPO HOLDINGS, INC.Direct owner · Schedule AInterest in SOMPO ASSET MANAGEMENT CO., LTD.
75%+

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 Sompo Asset Management Co.., Ltd...

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

Reported ownership and control details

Form ADV · Filing date 2026-06-12 · Schedules A and B

11 entries
#Owner / person & roleInterest in entityReported interestControl personTitle / status acquiredSource
1SOMPO HOLDINGS, INC.SHAREHOLDERForeign entitySOMPO ASSET MANAGEMENT CO., LTD.75% or moreCode EYesSHAREHOLDER02/1986Schedule APDF page 25
2GOYA NMN NAKAOSENIOR MANAGING EXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesSENIOR MANAGING EXECUTIVE OFFICER04/2026Schedule APDF page 25
3TOSHINOBU NMN KONDODIRECTOR (PART TIME)IndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesDIRECTOR (PART TIME)04/2022Schedule APDF page 25
4MOTOKAZU NMN OYAMAMANAGING EXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesMANAGING EXECUTIVE OFFICER04/2024Schedule APDF page 25
5KAZUHISA NMN SAKAKIBARAMANAGING EXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesMANAGING EXECUTIVE OFFICER04/2024Schedule APDF page 25
6YOSHIHISA NMN SATOEXECUTIVE OFFICER, CHIEF COMPLIANCE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesEXECUTIVE OFFICER, CHIEF COMPLIANCE OFFICER04/2026Schedule APDF page 25
7TADAAKI NMN UDODIRECTOR (OUTSIDE)IndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesDIRECTOR (OUTSIDE)06/2023Schedule APDF page 25
8HIROSHI NMN WATANABEDIRECTOR, MANAGING EXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesDIRECTOR, MANAGING EXECUTIVE OFFICER04/2026Schedule APDF page 25
9KOICHIRO NMN SUZUKIEXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesEXECUTIVE OFFICER04/2026Schedule APDF page 25
10TSUTOMU NMN YAMAGUCHIPRESIDENT & CEO, DIRECTORIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesPRESIDENT & CEO, DIRECTOR04/2025Schedule APDF page 25
11TAKENOBU NMN INOUEEXECUTIVE OFFICERIndividualSOMPO ASSET MANAGEMENT CO., LTD.Less than 5%Code NAYesEXECUTIVE OFFICER04/2026Schedule APDF page 25

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 6/12/2026 10:49:57 AM

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.