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Asset Management One Co., Ltd. — 13F Holdings & Portfolio

CIK 1068855 · latest 13F-HR filed 2026-07-28

Backtest portfolio

Asset Management One Co., Ltd. manages $38.97B in 13F-reported U.S. long-equity assets across 957 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are IVV (6.25%), NVDA (5.52%), AAPL (4.98%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 77 new positions and exited 31; 493 existing positions rose in reported value and 225 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$38.97B

Long-equity book

Holdings
957

Distinct positions

Period
2026-06-30

Filed 2026-07-28

Q/Q Activity
+77 / −31 / ↑493 / ↓225

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
IVV6.3% · +1%NVDA5.5% · -3%AAPL5.0% · +2%MSFT3.3% · +2%AMZN2.9% · +2%GOOGL2.6% · +4%AVGO2.1% · -1%GOOG2.0% · -2%MU1.6% · +5%META1.6% · +0%IEMG1.5% · -2%TSLA1.5% · +5%VGK1.4% · -1%LLY1.2% · +3%AMD1.1% · +4%JPM1.1% · -1%CAT0.9% · +0%JNJ0.8% · 0%BRK.B0.8% · +5%V0.8% · -1%WELL0.8% · +2%INTC0.8% · +4%LRCX0.7% · -6%AMAT0.7% · +9%XOM0.7% · -1%CSCO0.6% · +3%WMT0.6% · +0%GS0.6% · -2%PLD0.6% · -0%UNH0.6% · +9%COST0.5% · +0%KLAC0.5% · +850%ABBV0.5% · -5%MA0.5% · -2%GE0.5% · +11%EQIX0.5% · +1%HD0.5% · -4%BAC0.5% · -3%MRK0.5% · -4%PG0.4% · -0%KO0.4% · -6%IBM0.4% · +2%USIG0.4% · +8%CVX0.4% · -2%GEV0.4% · -5%PM0.4% · -11%PANW0.4% · -2%NFLX0.4% · -0%SPG0.3% · +0%MS0.3% · -2%C0.3% · -5%MRVL0.3% · +19%TXN0.3% · +2%SPHY0.3% · +19%AMGN0.3% · -2%DLR0.3% · +2%MBB0.3% · +6%MCD0.3% · +1%GLDM0.3% · -3%ORCL0.3% · +3%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

3 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 32.7%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People
Assets Under Management
$450.65B
Discretionary
$450.65B
Employees
927
Accounts
1,782
Address
TEKKO BUILDING
8-2, MARUNOUCHI 1 CHOME, CHIYODA-KU
TOKYO 100-0005
Japan
Phone
81-3-6774-5000
Website
This firm reports 2 disclosure items on its registration.
Name Title / Status Ownership Type
ABE, YUICHIRO, NMN ControlCHIEF FINANCIAL OFFICER, DIRECTOR, MANAGING EXECUTIVE OFFICER, HEAD OF PLANNING DIVISIONLess than 5%Individual
DAIICHI LIFE GROUP, INC ControlDIRECT OWNER25–50%Foreign Entity
HORIKAWA, KOHEI, NMN ControlCHIEF COMPLIANCE OFFICER, CHIEF LEGAL OFFICER, DIRECTOR, MANAGING EXECUTIVE OFFICER, HEAD OF RISK MANAGEMENT DIVISIONLess than 5%Individual
ITO, MASAKO, NMN ControlMANAGING EXECUTIVE OFFICER, DEPUTY-HEAD OF PLANNING DIVISIONLess than 5%Individual
IWABUCHI, KOYA, NMN ControlEXECUTIVE OFFICER, DEPUTY HEAD OF INSTITUTIONAL FIDUCIARY MANAGEMENT DIVISIONLess than 5%Individual
MIKI, TAKESHI, NMN ControlMANAGING EXECUTIVE OFFICER, HEAD OF INSTITUTIONAL FIDUCIARY MANAGEMENT DIVISIONLess than 5%Individual
MIZUHO FINANCIAL GROUP, INC. ControlDIRECT OWNER50–75%Foreign Entity
MURAMATSU, SHIGEKI, NMN ControlMANAGING EXECUTIVE OFFICER, HEAD OF INVESTMENTS DIVISIONLess than 5%Individual
NAGAHAMA, NOBUYUKI, NMN ControlCHIEF OPERATIONS OFFICER, EXECUTIVE OFFICER, HEAD OF DX & PROCESS INNOVATION DIVISIONLess than 5%Individual
NOGUCHI, HIROFUMI, NMN ControlMANAGING EXECUTIVE OFFICER, HEAD OF RETAIL & WEALTH SOLUTIONS DIVISIONLess than 5%Individual
ONO, TAKAO, NMN ControlEXECUTIVE OFFICER, DEPUTY HEAD OF RISK MANAGEMENT DIVISIONLess than 5%Individual
SASAKI, YUSUKE, NMN ControlDIRECTOR, MANAGING EXECUTIVE OFFICER, HEAD OF STRATEGIC FUND INVESTMENT DIVISION, HEAD OF PRODUCT DIVISIONLess than 5%Individual
SHIMADA, HIROMICHI, NMN ControlEXECUTIVE OFFICER, DEPUTY HEAD OF STRATEGIC FUND INVESTMENTS DIVISIONLess than 5%Individual
SUGIHARA, NORIYUKI, NMN ControlDIRECTOR, PRESIDENT & CHIEF EXECUTIVE OFFICERLess than 5%Individual
SUZUKI, TOSHINAO, NMN ControlEXECUTIVE OFFICER, DEPUTY HEAD OF DX & PROCESS INNOVATION DIVISIONLess than 5%Individual
TODA, TETSUJI, NMN ControlDIRECTOR, MEMBER OF AUDIT AND SUPERVISORY COMMITTEELess than 5%Individual
TSUMIKI, TOSHIHIRO, NMN ControlEXECUTIVE OFFICER, DEPUTY HEAD OF PRODUCT DIVISIONLess than 5%Individual
YANAGIHARA, AKITO, NMN ControlDIRECTOR, MEMBER OF AUDIT AND SUPERVISORY COMMITTEELess than 5%Individual

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 493 →

Top Trims

Show all 225 →

New Positions

Show all 77 →

Exited Positions

Show all 31 →

Asset Management One Co., Ltd. Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 ISHARES TR IVV 464287200 $2.44B 6.25% 3,253,020 SH
2 NVIDIA CORPORATION NVDA 67066G104 $2.15B 5.52% 10,758,962 SH
3 APPLE INC AAPL 037833100 $1.94B 4.98% 6,707,060 SH
4 MICROSOFT CORP MSFT 594918104 $1.28B 3.28% 3,425,583 SH
5 AMAZON COM INC AMZN 023135106 $1.11B 2.85% 4,661,019 SH
6 ALPHABET INC GOOGL 02079K305 $1.03B 2.65% 2,884,732 SH
7 BROADCOM INC AVGO 11135F101 $811.4M 2.08% 2,147,884 SH
8 ALPHABET INC GOOG 02079K107 $781.4M 2.01% 2,211,427 SH
9 MICRON TECHNOLOGY INC MU 595112103 $612.0M 1.57% 530,154 SH
10 META PLATFORMS INC META 30303M102 $604.4M 1.55% 1,073,040 SH
11 ISHARES INC IEMG 46434G103 $585.5M 1.50% 7,068,028 SH
12 TESLA INC TSLA 88160R101 $571.0M 1.47% 1,357,562 SH
13 VANGUARD INTL EQUITY INDEX F VGK 922042874 $552.6M 1.42% 6,241,352 SH
14 ELI LILLY & CO LLY 532457108 $461.3M 1.18% 384,625 SH
15 ADVANCED MICRO DEVICES INC AMD 007903107 $442.8M 1.14% 762,209 SH
16 JPMORGAN CHASE & CO JPM 46625H100 $431.5M 1.11% 1,318,113 SH
17 CATERPILLAR INC CAT 149123101 $340.8M 0.87% 320,025 SH
18 JOHNSON & JOHNSON JNJ 478160104 $317.3M 0.81% 1,249,228 SH
19 BERKSHIRE HATHAWAY INC DEL BRK.B 084670702 $310.0M 0.80% 619,590 SH
20 VISA INC V 92826C839 $308.7M 0.79% 899,673 SH
21 WELLTOWER INC WELL 95040Q104 $301.1M 0.77% 1,326,391 SH
22 INTEL CORP INTC 458140100 $292.5M 0.75% 2,094,705 SH
23 LAM RESEARCH CORP LRCX 512807306 $273.2M 0.70% 630,534 SH
24 APPLIED MATLS INC AMAT 038222105 $267.7M 0.69% 370,282 SH
25 EXXON MOBIL CORP XOM 30231G102 $265.1M 0.68% 1,939,080 SH
26 CISCO SYS INC CSCO 17275R102 $251.5M 0.65% 2,140,956 SH
27 WALMART INC WMT 931142103 $249.0M 0.64% 2,198,582 SH
28 GOLDMAN SACHS GROUP INC GS 38141G104 $244.6M 0.63% 241,898 SH
29 PROLOGIS INC. PLD 74340W103 $243.2M 0.62% 1,795,486 SH
30 UNITEDHEALTH GROUP INC UNH 91324P102 $224.7M 0.58% 540,703 SH
31 COSTCO WHOLESALE CORPORATION COST 22160K105 $212.6M 0.55% 227,281 SH
32 KLA CORP KLAC 482480100 $210.6M 0.54% 698,179 SH
33 ABBVIE INC ABBV 00287Y109 $210.5M 0.54% 836,335 SH
34 MASTERCARD INCORPORATED MA 57636Q104 $203.3M 0.52% 395,840 SH
35 GE AEROSPACE GE 369604301 $201.6M 0.52% 539,411 SH
36 EQUINIX INC EQIX 29444U700 $196.7M 0.50% 188,734 SH
37 HOME DEPOT INC HD 437076102 $184.1M 0.47% 521,980 SH
38 BANK OF AMER CORP BAC 060505104 $182.6M 0.47% 3,204,174 SH
39 MERCK & CO INC MRK 58933Y105 $177.3M 0.46% 1,380,043 SH
40 PROCTER & GAMBLE CO PG 742718109 $168.1M 0.43% 1,146,165 SH
41 COCA COLA CO KO 191216100 $167.0M 0.43% 2,054,854 SH
42 INTERNATIONAL BUSINESS MACHS IBM 459200101 $155.1M 0.40% 551,582 SH
43 ISHARES TR USIG 464288620 $154.0M 0.40% 3,002,847 SH
44 CHEVRON CORPORATION CVX 166764100 $154.0M 0.40% 929,123 SH
45 GE VERNOVA INC GEV 36828A101 $152.6M 0.39% 129,915 SH
46 PHILIP MORRIS INTL INC PM 718172109 $145.8M 0.37% 805,893 SH
47 PALO ALTO NETWORKS INC PANW 697435105 $141.0M 0.36% 413,429 SH
48 NETFLIX INC. NFLX 64110L106 $140.0M 0.36% 1,960,665 SH
49 SIMON PPTY GROUP INC NEW SPG 828806109 $134.9M 0.35% 603,265 SH
50 MORGAN STANLEY MS 617446448 $129.6M 0.33% 619,784 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-07-28 $38.97B 957 0001193125-26-318819
2026-03-31 2026-05-08 $33.91B 911 0001193125-26-213217
2025-12-31 2026-01-27 $35.97B 939 0001193125-26-023286
Filer Information
Address
TEKKO BUILDING
8-2, MARUNOUCHI 1-CHOME, CHIYODA-KU
TOKYO, M0 100-0005
Phone
81-3-6774-5055
Filing Manager
Asset Management One Co., Ltd.
TOKYO, M0
Signatory
GOTO, Ryoichi
Head of Legal & Compliance