TWUIX — Ultra Fund
Data updated: 2026-06-26
TWUIX — Ultra Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Leveraged · $26.59B AUM · 0.67% expense ratio · 29.2% 1-yr return. From SEC regulatory filings.
TWUIX Fund Overview
TWUIX — Ultra Fund is a US mutual fund managed by American Century Mutual Funds, Inc., categorised as Leveraged. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: American Century Mutual Funds, Inc.
- Category: Leveraged
- Assets under management: $26.59B
- 1-year return: 29.2%
- Ticker: TWUIX
- SEC CIK: 0000100334
- SEC series ID: S000006195
- Share class ID: C000017062
TWUIX Holdings
Top 10 holdings of Ultra Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| NVIDIA Corp | 15.47% |
| Apple Inc | 8.22% |
| Amazon.com Inc | 7.68% |
| Alphabet Inc | 6.68% |
| Microsoft Corp | 5.99% |
| Alphabet Inc | 5.76% |
| Broadcom Inc | 4.37% |
| Tesla Inc | 4.01% |
| Mastercard Inc | 3.28% |
| Meta Platforms Inc | 3.01% |
TWUIX Portfolio Allocation
Asset-class allocation of Ultra Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.0% |
| Cash & Equivalents | 0.1% |
TWUIX Performance
Total returns for TWUIX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.7% |
| 1 year | 29.2% |
| 3 years (annualised) | 22.6% |
| 5 years (annualised) | 10.8% |
TWUIX Risk Information
Risk metrics for TWUIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 17.8%
TWUIX Costs and Fees
TWUIX costs about $67 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.67%
- Gross expense ratio: 0.69%
- Portfolio turnover: 15%
- Brokerage commissions: 0.43 bps of average net assets (SEC N-CEN)
TWUIX Cashflows
Over the 12 months to 2026-04, Ultra Fund had net outflows of $136.36M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-04 | −$147.08M |
| 2026-03 | −$200.91M |
| 2026-02 | −$167.81M |
| 2026-01 | −$256.98M |
| 2025-12 | $2.32B |
| 2025-11 | −$130.41M |
TWUIX Debt Constituents
No individual debt constituents are reported in Ultra Fund's latest SEC N-PORT filing.
TWUIX Prospectus and SEC Filings
Official Ultra Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Leveraged 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.