MUOSX — US Core Portfolio
Data updated: 2026-08-21
MUOSX — US Core Portfolio. United States Large Cap Blend / Core Equity · $417.57M AUM · 0.75% expense ratio. Holdings, fees, performance and SEC filings.
MUOSX Fund Overview
MUOSX — US Core Portfolio is a US mutual fund managed by Morgan Stanley Institutional Fund INC, categorised as United States Large Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Morgan Stanley Institutional Fund INC
- Category: United States Large Cap Blend / Core Equity
- Assets under management: $417.57M
- 1-year return: 12.7%
- Ticker: MUOSX
- SEC CIK: 0000836487
- SEC series ID: S000053789
- Share class ID: C000169223
MUOSX Holdings
Top 10 holdings of US Core Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Alphabet Inc | 11.91% |
| NVIDIA Corp | 11.73% |
| Apple Inc | 10.38% |
| JPMorgan Chase & Co | 6.26% |
| General Electric Co | 5.66% |
| Amazon.com Inc | 5.40% |
| Eli Lilly & Co | 4.93% |
| Micron Technology Inc | 4.61% |
| Microsoft Corp | 4.48% |
| Jabil Inc | 3.35% |
MUOSX Portfolio Allocation
Asset-class allocation of US Core Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.1% |
MUOSX Performance
Total returns for MUOSX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 3.0% |
| 1 year | 12.7% |
| 3 years (annualised) | 18.8% |
| 5 years (annualised) | 11.1% |
MUOSX Risk Information
Risk metrics for MUOSX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 14.2%
MUOSX Costs and Fees
MUOSX costs about $75 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.75%
- Gross expense ratio: 1.08%
- Portfolio turnover: 42%
- Brokerage commissions: 0.32 bps of average net assets (SEC N-CEN)
MUOSX Cashflows
Over the 12 months to 2026-06, US Core Portfolio had net outflows of $21.95M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$4.45M |
| 2026-05 | −$5.83M |
| 2026-04 | −$3.15M |
| 2026-03 | −$3.02M |
| 2026-02 | −$13.44M |
| 2026-01 | $5.01M |
MUOSX Debt Constituents
No individual debt constituents are reported in US Core Portfolio's latest SEC N-PORT filing.
MUOSX Prospectus and SEC Filings
Official US Core Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-30
- Prospectus (485BPOS) — filed 2025-04-30
- Prospectus (485BPOS) — filed 2024-04-29
- Portfolio holdings (N-PORT) — filed 2026-08-21
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-07
Related Funds
Other United States Large Cap Blend / Core Equity funds tracked on ABC INVEST:
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, annual data from Form N-CEN, and shareholder reports from Form N-CSR.