OAKMX — Oakmark Fund, Investor Class
Data updated: 2026-08-26
OAKMX — Oakmark Fund, Investor Class. 0.89% expense ratio · since 1991 · Trading - Leveraged · $24.03B AUM. Holdings, fees, performance and SEC filings.
OAKMX Fund Overview
OAKMX — Oakmark Fund, Investor Class is a US mutual fund managed by Harris Associates L.P., categorised as Trading - Leveraged. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Adviser: Harris Associates L.P.
- Trust: Harris Associates Investment Trust
- Category: Trading - Leveraged
- Minimum investment: no minimum
- Additional investment: no minimum
- Inception date: August 5, 1991
- Assets under management: $24.03B
- 1-year return: 8.0%
- Ticker: OAKMX
- SEC CIK: 0000872323
- SEC series ID: S000002758
- Share class ID: C000007554
- FIGI: BBG000BG14W6
- LEI: 5493006VRMTE725JFU24
About OAKMX
Oakmark Fund (OAKMX) seeks long-term capital appreciation by investing primarily in a diversified portfolio of common stocks of U.S. companies, generally of larger capitalization. Using a value investment philosophy, it buys companies trading significantly below the adviser's estimate of their true business value and typically holds thirty to sixty stocks. Its Investor Class shares cost 0.89% a year and returned 8.0% in the 12 months to June 30, 2026, based on monthly returns reported to the SEC on Form N-PORT, with 7.9% volatility.
OAKMX Holdings
Top 10 holdings of Oakmark Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fixed Income Clearing Corp. | 5.42% |
| Targa Resources Corp | 3.22% |
| Delta Air Lines Inc | 3.13% |
| Keurig Dr Pepper Inc | 2.95% |
| Airbnb Inc | 2.92% |
| Citigroup Inc | 2.89% |
| Merck & Co Inc | 2.84% |
| Elevance Health Inc | 2.74% |
| Corteva Inc | 2.67% |
| Ally Financial Inc | 2.54% |
OAKMX Portfolio Allocation
Asset-class allocation of Oakmark Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 94.6% |
| Cash & Equivalents | 5.4% |
OAKMX Performance
Total returns for OAKMX through June 2026, from SEC filings.
| Period | Total return |
|---|---|
| YTD | -0.09% |
| 1 year | 8.01% |
| 3 years (annualised) | 13.80% |
| 5 years (annualised) | 9.85% |
OAKMX Risk Information
Risk metrics for OAKMX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 7.89%
OAKMX Costs and Fees
OAKMX costs about $89 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.89%
- Gross expense ratio: 0.89%
- Portfolio turnover: 35%
- Brokerage commissions: 4.58 bps of average net assets (SEC N-CEN)
OAKMX Cashflows
Over the 12 months to 2026-06, Oakmark Fund had net outflows of $1.97B, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$482.80M |
| 2026-05 | −$330.83M |
| 2026-04 | −$200.19M |
| 2026-03 | $1.27M |
| 2026-02 | −$209.15M |
| 2026-01 | −$456.03M |
OAKMX Debt Constituents
No individual debt constituents are reported in Oakmark Fund's latest SEC N-PORT filing.
OAKMX Prospectus and SEC Filings
Official Oakmark Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-27
- Prospectus (485BPOS) — filed 2025-01-28
- Prospectus (497) — filed 2025-05-19
- Portfolio holdings (N-PORT) — filed 2026-08-26
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-25
- Annual census (N-CEN) — filed 2025-12-15
- Annual census (N-CEN) — filed 2024-12-13
OAKMX Service Providers
Firms that manage, distribute, hold, administer and audit Oakmark Fund, as reported on SEC Form N-CEN, fiscal year ending September 30, 2025.
- Adviser: Harris Associates L.P.
- Distributor: Harris Associates Securities L.P.
- Custodian: State Street Bank and Trust Company
- Transfer agents: SS&C GIDS, Inc. and State Street Bank and Trust Company
- Administrator: State Street Bank and Trust Company
- Auditor: Deloitte & Touche LLP
- Securities lending agent: State Street Bank and Trust Company
Related Funds
Other Trading - Leveraged funds tracked on ABC INVEST:
OAKMX: Frequently Asked Questions
What is the expense ratio of Oakmark Fund (OAKMX)?
OAKMX has a net expense ratio of 0.89%, about $89 a year for every $10,000 invested. OAKMX fees and costs
What is the minimum investment for OAKMX?
OAKMX has no minimum initial investment, and there is no minimum for additional purchases. The fund may waive or reduce these minimums. Source: the fund's summary prospectus (April 2026).
What are OAKMX's top holdings?
As of June 30, 2026, OAKMX held 62 positions. The largest are Fixed Income Clearing Corp. (5.42%), Targa Resources Corp (3.22%), Delta Air Lines Inc (3.13%), Keurig Dr Pepper Inc (2.95%) and Airbnb Inc (2.92%). All OAKMX holdings
Can I download the full list of OAKMX holdings?
Yes. The complete OAKMX holdings list as of June 30, 2026 can be downloaded as a CSV file from the Holdings page: holding, ticker, FIGI, sector, country, asset type, shares, value and share of net assets, from the fund's SEC N-PORT filing. Download OAKMX holdings (CSV)
How has Oakmark Fund performed?
OAKMX returned +8.0% over the 12 months to June 2026, +13.8% a year over 3 years and +9.8% a year over 5 years. OAKMX performance and risk
How large is OAKMX?
OAKMX manages $24.03B (SEC N-PORT, June 2026). Investors withdrew a net $1.97B over the past 12 months.
Who manages OAKMX and when did it launch?
OAKMX is managed by Harris Associates L.P.. It is a series of Harris Associates Investment Trust. It launched on August 5, 1991.
How does OAKMX compare with similar Trading - Leveraged funds?
Among 206 Trading - Leveraged funds with $100M+ in assets, OAKMX ranks #87 of 205 on net expense ratio (0.89%) and #4 of 206 by assets. The largest is JPMorgan Ultra-Short Income ETF (JPST). Compare OAKMX with JPST
Where can I find OAKMX's prospectus and SEC filings?
OAKMX's latest prospectus (485BPOS) was filed January 27, 2026 and its latest N-PORT holdings report was filed August 26, 2026. All 54 filings are linked on ABC INVEST and on SEC EDGAR (series S000002758). OAKMX SEC filings
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, and annual data from Form N-CEN.
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.