ASSET MANAGEMENT ONE CO LTD
Q2 2026 Form 13-F

TOKYO
CIK 0001068855 · CRD 110843 · SEC-registered investment adviser
$39.0B Reported Value Total

ASSET MANAGEMENT ONE CO., LTD. reports 1,741 total accounts under management (AUM). There are 1,741 discretionary accounts valued at $470,542,380,723, and 0 non-discretionary accounts.

Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
SEC Registered Discretionary Manager
Firm Brochure (Part 2A)
Source: Form ADV filed 2026-06-29
Reported value
$39.0B
Quarter over quarter
+14.1%
Holdings
957
Top-10 concentration
32.7%

Filing Structure

Reports holdings for

  • Mizuho Financial Group Inc · File #028-14124 · Q1 2024 – Q3 2025 · declared by one filing
  • Asset Management One International Ltd · File #028-05881 · Q2 2013 – Q3 2021
  • Asset Management One International Ltd. (not a 13F filer in our records) · Q4 2016 – Q3 2021 · declared by one filing
  • DIAM U.S.A., Inc. (not a 13F filer in our records) · File #028-04697 · Q2 2013 – Q2 2016

Key People

Form ADV owners & control persons
Yuichiro Nmn Abe
CHIEF FINANCIAL OFFICER, DIRECTOR, MANAGING EXECUTIVE OFFICER, HEAD OF PLANNING DIVISION
Kohei Nmn Horikawa
CHIEF COMPLIANCE OFFICER, CHIEF LEGAL OFFICER, DIRECTOR, MANAGING EXECUTIVE OFFICER, HEAD OF RISK MANAGEMENT DIVISION
Masako Nmn Ito
MANAGING EXECUTIVE OFFICER, DEPUTY-HEAD OF PLANNING DIVISION
Q1 2026
Q3 2026
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Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.

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Q2 2026 13F filing summary

Period of report June 30, 2026
Filed July 28, 2026
Form 13F-HR
Reported value $39.0B
Positions 957
Change in reported value +14.9%
New positions 77
Exited positions 31
Position turnover 10.9%
Top-10 concentration 32.7%

13F filings by quarter

Quarter Positions Value
Q3 2026 13F
Filed Oct 27, 2026
 940 $40.0B
Q2 2026 13F
Filed Jul 28, 2026
 957 $39.0B
Q1 2026 13F
Filed May 8, 2026
 911 $33.9B
Q4 2025 13F
Filed Jan 27, 2026
 939 $36.0B
Q3 2025 13F
Filed Oct 22, 2025
 946 $34.5B
Q2 2025 13F
Filed Jul 31, 2025
 944 $31.9B
Q1 2025 13F
Filed Apr 23, 2025
 966 $28.9B
Q4 2024 13F
Filed Jan 30, 2025
 952 $29.1B
Q3 2024 13F
Filed Oct 30, 2024
 964 $28.1B
Q2 2024 13F
Filed Jul 18, 2024
 961 $26.1B
Q1 2024 13F
Filed May 2, 2024
 972 $25.9B
Q4 2023 13F
Filed Jan 24, 2024
 975 $24.8B
Q3 2023 13F
Filed Oct 19, 2023
 989 $22.5B
Q2 2023 13F
Filed Jul 31, 2023
 998 $23.6B
Q1 2023 13F
Filed Apr 25, 2023
 1,004 $22.1B
Q4 2022 13F
Filed Feb 6, 2023
 997 $20.5B
Q3 2022 13F
Filed Nov 4, 2022
 1,009 $19.7B
Q2 2022 13F
Filed Jul 29, 2022
 1,030 $21.3B
Q1 2022 13F
Filed May 13, 2022
 1,039 $25.6B
Q4 2021 13F
Filed Feb 9, 2022
 1,050 $28.7B

34 earlier quarters on file — choose one from the quarter menu above.

Top 20 holdings · Q2 2026

# Holding Reported value % of portfolio
1 IVV ISHARES TR $2.4B 6.25%
2 NVDA NVIDIA CORPORATION $2.2B 5.52%
3 AAPL APPLE INC $1.9B 4.98%
4 MSFT MICROSOFT CORP $1.3B 3.28%
5 AMZN AMAZON COM INC $1.1B 2.85%
6 GOOGL ALPHABET INC $1.0B 2.65%
7 AVGO BROADCOM INC $811.4M 2.08%
8 GOOG ALPHABET INC $781.4M 2.01%
9 MU MICRON TECHNOLOGY INC $612.0M 1.57%
10 META META PLATFORMS INC $604.4M 1.55%
11 IEMG ISHARES INC $585.5M 1.5%
12 TSLA TESLA INC $571.0M 1.47%
13 VGK VANGUARD INTL EQUITY INDEX F $552.6M 1.42%
14 LLY ELI LILLY & CO $461.3M 1.18%
15 AMD ADVANCED MICRO DEVICES INC $442.8M 1.14%
16 JPM JPMORGAN CHASE & CO $431.5M 1.11%
17 CAT CATERPILLAR INC $340.8M 0.87%
18 JNJ JOHNSON & JOHNSON $317.3M 0.81%
19 BRK-B BERKSHIRE HATHAWAY INC DEL $310.0M 0.8%
20 V VISA INC $308.7M 0.79%

Values as reported on the Q2 2026 Form 13F. Every position is in the holdings table below.

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