Asset Management One Co., Ltd.
All 13F Filings
- Location
- Tokyo, M0
- Most recent 13F
- Q4 2025
- Holdings value ($000)
- 35,965,882
- Description
- Tokyo based fundamental portfolio management house with a continental governance structure and a mandate specific and implementation minded investment mandate. The approach emphasizes active stewardship and governance oversight, valuation discipline and downside awareness, and fundamental research depth for public markets focused allocations. Risk framing is embedded in allocation decisions, position sizing, and portfolio construction discipline through fundamental conviction testing and implementation consistency.
- Founded
- 2016
- Chairman
- —
- CEO
- —
- All SEC filings
- View on sec.gov
Sector allocation over time (stocks only)
Stacked by quarter. Hover to see detailed sector breakdown for any quarter.
| Quarter | Date Filed | Holdings | Value ($000) | Form Type | Name |
|---|---|---|---|---|---|
| Q4 2025 | 1/27/2026 | 939 | 35,965,882 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2025 | 10/22/2025 | 946 | 34,514,544 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2025 | 7/31/2025 | 944 | 31,895,945 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2025 | 4/23/2025 | 966 | 28,914,091 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2024 | 1/30/2025 | 952 | 29,105,403 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2024 | 10/30/2024 | 965 | 28,100,679 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2024 | 7/18/2024 | 962 | 26,139,351 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2024 | 5/2/2024 | 973 | 25,946,766 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2023 | 1/24/2024 | 976 | 24,843,647 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2023 | 10/19/2023 | 990 | 22,461,062 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2023 | 7/31/2023 | 999 | 23,625,519 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2023 | 4/25/2023 | 1,006 | 22,063,441 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2022 | 2/6/2023 | 999 | 20,518,968 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2022 | 11/4/2022 | 1,012 | 19,654,211 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2022 | 7/29/2022 | 1,033 | 21,296,065 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2022 | 5/13/2022 | 1,039 | 25,615,699 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2021 | 2/9/2022 | 1,051 | 28,704,098 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2021 | 11/2/2021 | 1,046 | 26,084,428 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2021 | 8/3/2021 | 1,044 | 26,872,775 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2021 | 5/14/2021 | 1,045 | 25,180,718 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2020 | 2/12/2021 | 1,027 | 24,280,686 | 13F-HR | Asset Management One Co., Ltd. |
| Q3 2020 | 11/13/2020 | 1,061 | 21,754,406 | 13F-HR | Asset Management One Co., Ltd. |
| Q2 2020 | 8/14/2020 | 1,044 | 20,333,645 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2020 | 5/14/2020 | 1,058 | 17,125,696 | 13F-HR | Asset Management One Co., Ltd. |
| Q4 2019 | 2/14/2020 | 1,037 | 22,185,659 | 13F-HR | Asset Management One Co., Ltd. |
| Q1 2014 | 5/5/2014 | 1,304 | 6,345,604 | 13F-HR | DIAM Co., Ltd. |
| Q4 2013 | 2/5/2014 | 1,292 | 6,452,414 | 13F-HR/A - RESTATEMENT | DIAM Co., Ltd. |
| Q4 2013 | 1/29/2014 | 1,291 | 6,452,414 | 13F-HR | DIAM Co., Ltd. |
| Q3 2013 | 2/5/2014 | 1,287 | 6,645,120 | 13F-HR/A - RESTATEMENT | DIAM Co., Ltd. |
| Q2 2013 | 2/12/2014 | 1,141 | 6,158,187 | 13F-HR/A - RESTATEMENT | DIAM Co., Ltd. |
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Money flow by instrument (QoQ, ex-options)
| Type | Value ($000) | Share % | Inflow | Outflow | Net |
|---|---|---|---|---|---|
| Stocks | 32.39 M | 90.1% | 1.388 M | 0 | 1.388 M |
| ETFs | 3.521 M | 9.8% | 64.48 K | 0 | 64.48 K |
| Debt | 11.42 K | 0.0% | 0 | 786 | -786 |
| Other | 42.86 K | 0.1% | 0 | 323 | -323 |
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Fund Snapshot
Q4 2025
Latest filed
1/27/2026
Total value ($000)
35,965,882
Holdings
939
QoQ value change ($000)
1,451,338
(4.2%)
Value = total reported 13F value ($000), Holdings = number of positions.
13F Value over time
Holdings count over time
Sector allocation (latest, stocks only)
Methodology:
sector allocation is stocks-only;
instrument flow table is ex-options;
options exposure is shown separately.
Details.