Mid Cap Index Fund
VALIC Co I · 1 share class
Fund classification
Classified from what the fund holds · as of 2026 Q2
Mid Cap Index Fund is a U.S. equity index fund that tracks the S&P MidCap 400 Index. 18% of VMIDX’s stock holdings are in companies whose revenue grew in the top quartile of U.S. companies over the last five fiscal years (covering 90% of the fund’s equity).
- Asset class
- Equity
- Region
- United States
- Management
- Index (passive)
- Fund type
- Open-end fund
Fund profile
As filed in the prospectus · 2025 Q3
The Fund seeks to provide growth of capital through investments primarily in a diversified portfolio of common stocks that, as a group, are expected to provide investment results closely corresponding to the performance of the S&P MidCap 400 Index (the Index).
The fund is managed by a subadviser to track the S&P MidCap 400 Index, either by holding all index constituents in the same proportions or by using optimization to select a sampling of stocks that match the index's industry weightings, market capitalizations, and fundamental characteristics. Because the subadviser may employ optimization rather than full replication, the fund's performance may diverge from the index. The fund may lend securities to generate additional income and may use derivatives including futures and total return swaps to track index performance.
| Share class | Gross | Net |
|---|---|---|
| VMIDX | 0.36% | 0.35% |
Net is what a holder pays after the adviser's contractual waiver; gross is before it. A waiver can expire.
Portfolio turnover 18.00% · as of 2025 Q3
Allocation
Asset groups · long / short shown separately, never netted · 2026 Q2
| Stocks | 99.94% |
| Cash & short-term | 1.25% |
| Derivatives | 0.01% |
Derivatives are shown at market value, not notional exposure.
Sector allocation
The same holdings as Allocation above, grouped by market sector instead of asset type · as of 2026 Q2
| Industrials | 24.8% |
| Information Technology | 15.5% |
| Financials | 13.7% |
| Consumer Discretionary | 10.5% |
| 10 smaller | 35.5% |
Government, Securitized and Cash are non-corporate buckets; International is foreign holdings we don’t sector-classify, and Other is the residual (held funds, unresolved names).
Portfolio growth profile
How much of the fund’s stock holdings are in fast-growing companies · as of 2026 Q2
Share of the fund’s equity (by value) in companies whose trailing five-year revenue — or net-income — growth ranks in the top 25% of U.S. public companies. Foreign and newly-listed holdings are excluded, so the figure covers only part of the book. From SEC filings — not investment advice. How we measure this.
Latest quarter
What changed since the fund's previous filing
Return profile
Total return as filed — price change plus distributions reinvested · trailing figures to Apr 2026
May 2026 has been filed since the trailing figures were struck, so it is not in the table above or the curve — every figure here shares one cut-off, which is what makes them comparable with other funds.
Holdings
By % of NAV · equity positions carry filed share counts · every resolvable issuer links to its company page
| Ticker | Issuer | %NAV | Reported price | Value | Shares |
|---|---|---|---|---|---|
| — | Flex Ltd | 1.57% | $150.78 | $40.69M | 269.9K |
| — | State Street Global Advisors | 1.25% | — | $32.26M | — |
| TWLO | Twilio IncTWLO | 0.82% | $190.64 | $21.21M | 111.3K |
| — | TechnipFMC PLC | 0.79% | $68.42 | $20.31M | 296.9K |
| CW | Curtiss-Wright CorpCW | 0.78% | $747.61 | $20.23M | 27.1K |
| — | nVent Electric PLC | 0.77% | $166.99 | $19.78M | 118.4K |
| STRL | Sterling Infrastructure IncSTRL | 0.75% | $860.84 | $19.41M | 22.5K |
| XPO | XPO IncXPO | 0.71% | $214.25 | $18.42M | 86.0K |
| P | Everpure IncP | 0.71% | $79.51 | $18.30M | 230.2K |
| ILMN | Illumina IncILMN | 0.71% | $162.96 | $18.29M | 112.2K |
Reported price is the fund's own reported value divided by its own reported shares at 2026-05-31 — not a live quote, and not what the fund paid.
Top 10 positions are 8.85% of net assets, top 25 18.20%, across 403 issuers.
See more of this fund's book
More positions with filed share counts, and the quarter-over-quarter change list rather than the largest few — free with an account, no card required.
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