Sompo Asset Management: AUM & Ownership

Clients

Sompo Asset Management serves 541 clients, 295 of them pooled investment vehicles. The average client has about $47 million with the firm.

Regulatory assets by client type

Pooled investment vehicles295 clients46%
Pension and profit-sharing plans220 clients44%
Insurance companies8 clients8%
OtherBanking or thrift institutions, Other investment advisers, Corporations and other businesses2%

Show client breakdown

Client type	Clients	Regulatory AUM	Share	Avg. per client
Banking or thrift institutions	2	$14,921,188	0.1%	$7.46M
Pooled investment vehicles	295	$11,790,354,849	46.4%	$40.0M
Pension and profit-sharing plans	220	$11,257,320,981	44.3%	$51.2M
Other investment advisers	3	$301,616,775	1.2%	$100.5M
Insurance companies	8	$1,923,686,144	7.6%	$240.5M
Corporations and other businesses	13	$102,691,648	0.4%	$7.90M
Total	541	$25,390,591,585	100%	$46.9M

Banking or thrift institutions

Clients: 2
Regulatory AUM: $14,921,188
Share: 0.1%
Avg. per client: $7.46M

Pooled investment vehicles

Clients: 295
Regulatory AUM: $11,790,354,849
Share: 46.4%
Avg. per client: $40.0M

Pension and profit-sharing plans

Clients: 220
Regulatory AUM: $11,257,320,981
Share: 44.3%
Avg. per client: $51.2M

Other investment advisers

Clients: 3
Regulatory AUM: $301,616,775
Share: 1.2%
Avg. per client: $100.5M

Insurance companies

Clients: 8
Regulatory AUM: $1,923,686,144
Share: 7.6%
Avg. per client: $240.5M

Corporations and other businesses

Clients: 13
Regulatory AUM: $102,691,648
Share: 0.4%
Avg. per client: $7.90M

Total

Clients: 541
Regulatory AUM: $25,390,591,585
Share: 100%
Avg. per client: $46.9M

What it does

Sompo Asset Management provides portfolio management for pooled vehicles and portfolio management for institutions. It is paid through a percentage of assets and performance-based fees.

Sompo Asset Management advises no private funds.

100.0% of assets ($25.39B across 541 accounts) are managed with discretion. 100% of clients are outside the U.S., and 10 clients received advice without assets under management last fiscal year.

What the accounts hold

Separately managed account assets by class, year end

Stocks58%
Funds7%
Bonds24%
- Investment grade corporate bonds15%
- Sovereign bonds9%
Other11%
- Securitized assets11%

Custodians

Sompo Asset Management’s client accounts are held mainly at Custody Bank of Japan, with 26% of managed assets, and State Street Trust and Banking, with 15%. Sompo Asset Management does not have custody of client assets.

Managed account assets by custodian

Custody Bank of JapanCustody Bank of Japan, LTD. · Tokyo · $6.56B26%
State Street Trust and BankingState Street Trust and Banking Co., LTD. · Tokyo · $3.84B15%
The Master Trust Bank of JapanThe Master Trust Bank of Japan, LTD. · Tokyo · $1.28B5%
All other custodians$13.71B54%

Ownership and leadership

Sompo Holdings, Inc. owns 75% or more of Sompo Asset Management.

Who owns the firm

Sompo Asset Management Co., LTD.· the adviser

Sompo Holdings, Inc.
Control person · since February 1986
Owns 75% or more of Sompo Asset Management Co., LTD.

Leadership

Tsutomu Yamaguchi
President & CEO, Director
Yoshihisa Sato
Executive Officer, Chief Compliance Officer
Takenobu Inoue
Executive Officer
Toshinobu Kondo
Director (part Time)
Goya Nakao
Senior Managing Executive Officer
Motokazu Oyama
Managing Executive Officer
Kazuhisa Sakakibara
Managing Executive Officer
Koichiro Suzuki
Executive Officer
Tadaaki Udo
Director (outside)
Hiroshi Watanabe
Director, Managing Executive Officer

Staff

204 employees
61 in advisory functions

Reported holdings

Sompo Asset Management’s reported 13F holdings total $609.2M across 177 positions, and the ten largest make up 46.9% of it.

$609.2M
Reported 13F value: 177
Positions: 46.9%
In the 10 largest: +11.8%
Value vs. prior quarter

Ten largest positions, share of reported value

Vanguard Index Fds · S&P 500 ETF Shs8.7%
iShares Inc. · Core MSCI Emkt8.3%
iShares TR · 7-10 YR Trsy BD7.3%
Alphabet Inc. · Cap Stk CL A4.8%
Nvidia Corporation4.7%
Apple Inc.4.6%
Microsoft Corp.3.4%
Visa Inc. · Com CL A1.9%
Applied Matls Inc.1.6%
Intel Corp.1.6%

Together, the ten largest are 46.9% of reported value.

The 50 largest positions and quarterly changesQuarter ended 30 June 2026 · filed 14 July 2026

A 13F covers only exchange-traded long positions the firm holds with discretion, so this $609.2M is not its $25.39B in regulatory assets and does not represent any individual client's portfolio.

Fees

Sompo Asset Management is paid through a percentage of assets under management and performance-based fees.

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

Offices and registrations

Besides its headquarters, Sompo Asset Management has 0 offices, with 1 listed address with no US state reported.

Registration details

Legal name: Sompo Asset Management Co., LTD.
Headquarters: Kyoritsu Nihonbashi BLDG., 2-2-16 Nihonbashi, Chuo-Ku, Tokyo, Japan 1030027
Phone: 81352903400
Website: Not reported
SEC file: 801-110538
Structure: corporation organized in Japan
Fiscal year end: March

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 Sompo Asset Management have?

Sompo Asset Management has 541 clients and manages $25.4 billion for them, as of June 2026. They include 295 pooled investment vehicles, 220 pension and profit-sharing plans and 13 corporations and other businesses.

Source: Form ADV Part 1A, Items 5.D and 5.F, filed 12 June 2026

What services does Sompo Asset Management offer?

Sompo Asset Management provides portfolio management for pooled vehicles and portfolio management for institutions.

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

Which custodians does Sompo Asset Management use?

Sompo Asset Management’s separately managed account assets are held at Custody Bank of Japan, LTD. (Tokyo), with $6,557,353,621, State Street Trust and Banking Co., LTD. (Tokyo), with $3,843,607,096 and The Master Trust Bank of Japan, LTD. (Tokyo), with $1,275,589,875. Only custodians holding at least a tenth of those assets are named.

Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 12 June 2026

How many financial advisors does Sompo Asset Management have?

Sompo Asset Management has 0 investment adviser representatives registered with state securities authorities, out of 204 employees, and 61 perform investment advisory functions. None are registered representatives of a broker-dealer or 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 Sompo Asset Management invest in?

At the end of its last fiscal year, Sompo Asset Management’s separately managed accounts held 58% exchange-traded equities, 15% investment grade corporate bonds, 11% securitized assets, 9% sovereign bonds and 7% pooled vehicles (private funds and similar). It advises no private funds of its own.

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

Who owns Sompo Asset Management?

Sompo Asset Management’s direct owner is Sompo Holdings, Inc. (75% or more).

Source: Form ADV Part 1A, Schedules A and B, filed 12 June 2026

How does Sompo Asset Management get paid?

Sompo Asset Management is paid through a percentage of assets under management 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