TRMNX — T. Rowe Price Mid-Cap Index Fund
Data updated: 2026-05-28
TRMNX — T. Rowe Price Mid-Cap Index Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Blend / Core Equity · $373.51M AUM · 0.27% expense ratio · 18.9% 1-yr return. From SEC regulatory filings.
TRMNX Fund Overview
TRMNX — T. Rowe Price Mid-Cap Index Fund is a US mutual fund managed by T. Rowe Price Index Trust, Inc., categorised as United States Mid 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: T. Rowe Price Index Trust, Inc.
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $373.51M
- 1-year return: 18.9%
- Ticker: TRMNX
- SEC CIK: 0000858581
- SEC series ID: S000051326
- Share class ID: C000161835
TRMNX Holdings
Top 10 holdings of T. Rowe Price Mid-Cap Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Grs - Security Lending Collateral | 2.28% |
| Marvell Technology, Inc. | 1.87% |
| Spotify Technology SA | 1.66% |
| Cloudflare, Inc. - Class A | 1.44% |
| Cheniere Energy, Inc. | 1.35% |
| Snowflake, Inc. | 1.11% |
| Anglogold Ashanti PLC | 1.09% |
| Nu Holdings Ltd/cayman Isl-A | 1.07% |
| Ferguson Enterprises, Inc. | 0.99% |
| Alnylam Pharmaceuticals, Inc. | 0.93% |
TRMNX Portfolio Allocation
Asset-class allocation of T. Rowe Price Mid-Cap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.9% |
| Cash & Equivalents | 2.4% |
TRMNX Performance
Total returns for TRMNX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | -2.5% |
| 1 year | 18.9% |
| 3 years (annualised) | 16.5% |
| 5 years (annualised) | 5.4% |
TRMNX Risk Information
Risk metrics for TRMNX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.1%
TRMNX Costs and Fees
TRMNX costs about $27 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.27%
- Gross expense ratio: 0.30%
- Portfolio turnover: 39%
- Brokerage commissions: 0.89 bps of average net assets (SEC N-CEN)
TRMNX Cashflows
Over the 12 months to 2026-03, T. Rowe Price Mid-Cap Index Fund had net inflows of $102.61M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $4.13M |
| 2026-02 | $16.29M |
| 2026-01 | $13.57M |
| 2025-12 | $34.82M |
| 2025-11 | $4.97M |
| 2025-10 | $5.27M |
TRMNX Debt Constituents
No individual debt constituents are reported in T. Rowe Price Mid-Cap Index Fund's latest SEC N-PORT filing.
TRMNX Prospectus and SEC Filings
Official T. Rowe Price Mid-Cap Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid 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.