Summary Prospectus by Investment Company (Form 497K)

Summary Prospectus

October 1, 2025

VALIC Company I

Large Cap Core Fund (formerly, Large Capital Growth Fund)

(Ticker: VLCGX)

The Fund's Statutory Prospectus and Statement of Additional Information, each dated October 1, 2025, as amended and supplemented from time to time, and the most recent shareholder reports are incorporated into and made part of this Summary Prospectus by reference. The Fund is offered only to registered and unregistered separate accounts of The Variable Annuity Life Insurance Company and its affiliates and to qualifying retirement plans and IRAs and is not intended for use by other investors.

Before you invest, you may want to review the Fund's Statutory Prospectus, which contains more information about the Fund and its risks. You can find the Statutory Prospectus and the above-incorporated information online at https://www.corebridgefinancial.com/rs/prospectus-and-reports/annuities#underlyingfunds. You can also get this information at no cost by calling 800-448-2542 or by sending an e-mail request to [email protected].

The Securities and Exchange Commission has not approved or disapproved these securities, nor has it determined that this Summary Prospectus is accurate or complete. It is a criminal offense to state otherwise.

Investment Objective

The Fund seeks to provide long-term growth of capital.

Fees and Expenses of the Fund

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. The table and the example below do not reflect the separate account fees charged in the variable annuity or variable life insurance policy ("Variable Contracts") in which the Fund is offered. If separate account fees were shown, the Fund's annual operating expenses would be higher. Please see your Variable Contract prospectus for more details on the separate account fees.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)  

Management Fees	0.64%
Other Expenses	0.11%
Total Annual Fund Operating Expenses	0.75%
Fee Waivers and/or Expense Reimbursements1	0.09%
Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements1	0.66%

Expense Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same (except that the Example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). The Example does not reflect charges imposed by the Variable Contract. If the Variable Contract fees were reflected, the expenses would be higher. See the Variable Contract prospectus for information on such charges. Although your actual costs may be higher or lower, based on these assumptions and the net expenses shown in the fee table, your costs would be: 

1 Year	3 Years	5 Years	10 Years
$67	$231	$408	$922

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance.

During the most recent fiscal year, the Fund's portfolio turnover rate was 18% of the average value of its portfolio.

Large Cap Core Fund (formerly, Large Capital Growth Fund)

Principal Investment Strategies of the Fund

The Fund seeks to meet its objective by investing, normally, at least 80% of its net assets in securities of large-cap companies. In complying with this 80% investment requirement, the Fund will invest primarily in equity securities, which may include common stocks and depositary receipts.

Generally, large-cap companies will include companies whose market capitalizations, at the time of purchase, are equal to or greater than the market capitalization of the smallest company in the S&P 500® Index (the "Index") during the most recent 12-month period. As of July 31, 2025, the median stock by market capitalization in the Index was approximately $15.75 billion and the largest stock by market capitalization was $4.34 trillion. The size of the companies in the Index changes with market conditions and the composition of the Index.

The Fund may invest up to 25% of its total assets in U.S. dollar-denominated foreign securities, either directly or through depositary receipts.

Derivatives, which are instruments that have a value based on another instrument, exchange rate or index, may be used as substitutes for securities in which the Fund can invest. To the extent the Fund uses derivatives, the Fund will primarily use futures contracts to more effectively gain targeted equity exposure from its cash positions. A derivative instrument that provides exposure to the types of investments that are included in the Fund's 80% policy or exposure to one or more market risk factors associated with such investments will be counted towards compliance with the 80% policy.

The Fund is managed by two subadvisers. Each of the Fund's subadvisers manages a portion of the Fund's assets using different investment approach.

In managing its portion of the Fund, one subadviser takes an in-depth look at company prospects, which is designed to provide insight into a company's real growth potential. The research findings allow the subadviser to rank the companies in each sector group according to their relative value. As part of its investment process, the subadviser seeks to assess the impact of environmental, social and governance (ESG) factors on many issuers in the universe in which the Fund may invest. The subadviser's assessment is based on an analysis of key opportunities and risks across industries to seek to identify financially material issues with respect to the Fund's investments in securities and ascertain key issues that merit engagement

with issuers. These assessments may not be conclusive and securities of issuers that may be negatively impacted by such factors may be purchased and retained by the Fund while the Fund may divest or not invest in securities of issuers that may be positively impacted by such factors. On behalf of the Fund, the subadviser then buys and sells equity securities, using the research and valuation rankings as a basis. In general, the subadviser buys equity securities that are identified as attractively valued and considers selling them when they appear to be overvalued. Along with attractive valuation, the subadviser often considers other criteria including, but not limited to:

In managing its portion of the Fund, the other subadviser seeks sector and industry-neutral exposure to the Index, with value added through stock selection. The subadviser will attempt to outperform the Index by overweighting those stocks that are viewed favorably relative to their weighing in the Index, and underweighting or avoiding those stocks that are viewed negatively. The subadviser combines fundamental research with a disciplined portfolio construction process to pursue the investment objective. A portfolio oversight team, which includes portfolio managers, is responsible for the overall structure of the strategy and for developing rules for portfolio construction employed by the subadviser. The portfolio oversight team seeks to take advantage of the subadviser's fundamental research by assigning equity analysts to select stocks for the strategy within industries where they have focused expertise. The equity analysts are responsible for selecting stocks and determining the stocks' weights, subject to the oversight and discretion of the portfolio managers who work closely with the analysts.

To generate additional income, the Fund may lend portfolio securities to broker-dealers and other financial institutions provided that the value of the loaned securities does not exceed 30% of the Fund's total assets. These loans earn income for the Fund and are collateralized by cash and securities issued or guaranteed by the U.S. Government or its agencies or instrumentalities.

The Fund will not concentrate its assets in any single industry but may from time to time invest a higher percentage of its assets in companies conducting business in various industries within an economic sector, including the technology sector.

Large Cap Core Fund (formerly, Large Capital Growth Fund)

Investors will be given at least 60 days' written notice in advance of any change to the Fund's 80% investment policy set forth above.

Principal Risks of Investing in the Fund

As with any mutual fund, there can be no assurance that the Fund's investment objective will be met or that the net return on an investment in the Fund will exceed what could have been obtained through other investment or savings vehicles. Shares of the Fund are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. If the value of the assets of the Fund goes down, you could lose money.

The following is a summary of the principal risks of investing in the Fund.

Equity Securities Risk. The Fund invests primarily in equity securities and is therefore subject to the risk that stock prices will fall and may underperform other asset classes. Individual stock prices fluctuate from day-to-day and may decline significantly. The prices of individual stocks may be negatively affected by poor company results or other factors affecting individual prices, as well as industry and/or economic trends and developments affecting industries or the securities market as a whole.

Large-Cap Companies Risk. Investing primarily in large-cap companies carries the risk that due to current market conditions these companies may be unable to respond quickly to new competitive challenges or attain the high growth rate of successful smaller companies. Larger, more established companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes. Larger companies also may not be able to attain the high growth rate of successful smaller companies, particularly during extended periods of economic expansion.

Management Risk. The investment style or strategy used by a subadviser may fail to produce the intended result. A subadviser's assessment of a particular security or company may prove incorrect, resulting in losses or underperformance.

Dividend-paying Stocks Risk. There is no guarantee that the issuers of the stocks held by the Fund will declare dividends in the future or that, if dividends are declared, they will remain at their current levels or increase over time. Dividend-paying stocks may not participate in a broad market advance to the same degree as other stocks, and a sharp rise in interest rates or economic downturn could cause a company to unexpectedly reduce or eliminate its dividend.

Depositary Receipts Risk. Depositary receipts are generally subject to the same risks as the foreign securities that they evidence or into which they may be converted. The issuers of unsponsored depositary receipts are not obligated to disclose information that is considered material in the United States. Therefore, there may be less information available regarding the issuers and there may not be a correlation between such information and the market value of the depositary receipts. Certain depositary receipts are not listed on an exchange and therefore are subject to illiquidity risk.

Derivatives Risk. The prices of derivatives may move in unexpected ways due to the use of leverage and other factors and may result in increased volatility or losses. The Fund may not be able to terminate or sell derivative positions, and a liquid secondary market may not always exist for derivative positions.

Futures Risk. A futures contract is considered a derivative because it derives its value from the price of the underlying currency, security or financial index. The prices of futures contracts can be volatile and futures contracts may lack liquidity. In addition, there may be imperfect or even negative correlation between the price of a futures contract and the price of the underlying currency, security or financial index.

ESG Investment Risk. The portfolio manager(s) may utilize ESG criteria, integrate ESG considerations and/or use related analyses to select investments for the Fund. These strategies may impact the Fund's performance, including relative to similar funds that do not adhere to such ESG criteria, ESG integration and/or related analyses as part of the investment process. Additionally, the Fund's adherence to these strategies in connection with identifying and selecting investments may require subjective and qualitative analysis and may be more difficult if data about a particular company or market is limited, such as with respect to issuers in emerging markets countries. The Fund may invest in companies that do not reflect the beliefs and values of any particular investor. Socially responsible norms differ by country and region, and a company's ESG practices or a portfolio manager's assessment of such may change over time. ESG characteristics may not be the only factors considered in selecting investments and as a result, the Fund's investments may not have favorable ESG characteristics or high ESG ratings.

Foreign Investment Risk. Investment in foreign securities involves risks due to several factors, such as illiquidity, the lack of public information, changes in the exchange rates between foreign currencies and the U.S. dollar, unfavorable political, social and legal

Large Cap Core Fund (formerly, Large Capital Growth Fund)

developments, or economic and financial instability. Foreign companies are not subject to the U.S. accounting and financial reporting standards and may have riskier settlement procedures. U.S. investments that are denominated in foreign currencies or that are traded in foreign markets, or securities of U.S. companies that have significant foreign operations may be subject to foreign investment risk.

Growth Style Risk. Generally, "growth" stocks are stocks of companies that a subadviser believes have anticipated earnings ranging from steady to accelerated growth. Many investors buy growth stocks because of anticipated superior earnings growth, but earnings disappointments often result in sharp price declines. Growth companies usually invest a high portion of earnings in their own businesses so their stocks may lack the dividends that can cushion share prices in a down market. In addition, the value of growth stocks may be more sensitive to changes in current or expected earnings than the value of other stocks, because growth stocks trade at higher prices relative to current earnings.

Market Risk. The Fund's share price can fall because of weakness in the broad market, a particular industry, or specific holdings or due to adverse social, political or economic developments here or abroad, changes in investor psychology, technological disruptions, or heavy institutional selling and other conditions or events (including, for example, military confrontations, war, terrorism, trade wars, disease/virus, outbreaks and epidemics). The prices of individual securities may fluctuate, sometimes dramatically, from day to day. The prices of stocks and other equity securities tend to be more volatile than those of fixed-income securities.

Sector Risk. Companies with similar characteristics may be grouped together in broad categories called sectors. Sector risk is the risk that securities of companies within specific sectors of the economy can perform differently than the overall market. This may be due to changes in such things as the regulatory or competitive environment or to changes in investor perceptions regarding a sector. Because the Fund may allocate relatively more assets to certain sectors than others, the Fund's performance may be more susceptible to any developments which affect those sectors emphasized by the Fund.

Technology Sector Risk. Technology stocks historically have experienced unusually wide price swings. Earnings disappointments and intense competition for market share

can result in sharp declines in the prices of technology stocks.

Securities Lending Risk. Engaging in securities lending could increase the market and credit risk for Fund investments. The Fund may lose money if it does not recover borrowed securities, the value of the collateral falls, or the value of investments made with cash collateral declines. The Fund's loans will be collateralized by securities issued or guaranteed by the U.S. Government or its agencies and instrumentalities, which subjects the Fund to the credit risk of the U.S. Government or the issuing federal agency or instrumentality. If the value of either the cash collateral or the Fund's investments of the cash collateral falls below the amount owed to a borrower, the Fund also may incur losses that exceed the amount it earned on lending the security. Securities lending also involves the risks of delay in receiving additional collateral or possible loss of rights in the collateral if the borrower fails. Another risk of securities lending is the risk that the loaned portfolio securities may not be available to the Fund on a timely basis and the Fund may therefore lose the opportunity to sell the securities at a desirable price.

Performance Information

The following Risk/Return Bar Chart and Table illustrate the risks of investing in the Fund by showing changes in the Fund's performance from calendar year to calendar year and comparing the Fund's average annual returns to those of the S&P 500® Index (a broad-based securities market index) and the Russell 1000® Growth Index. Effective September 29, 2025, the Fund no longer measures its performance against the Russell 1000® Growth Index. The Fund's returns prior to September 29, 2025, as reflected in the bar chart and table, are the returns of the Fund when it followed different investment strategies. under the name "Large Capital Growth Fund." Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance of the Fund is not necessarily an indication of how the Fund will perform in the future.

T. Rowe Price Associates, Inc. ("T. Rowe Price") and J.P. Morgan Investment Management Inc. ("JPMIM") assumed subadvisory duties on September 29, 2025. From inception through September 15, 2013, SunAmerica Asset Management, LLC and Invesco Advisers, Inc. were subadvisers to the Fund. From September 16, 2013,

Large Cap Core Fund (formerly, Large Capital Growth Fund)

through September 28, 2025, Massachusetts Financial Services Company was subadviser to the Fund.

 

During the period shown in the bar chart: 

Highest Quarterly Return:	June 30, 2020	20.77%
Lowest Quarterly Return:	March 31, 2020	-17.87%
Year to Date Most Recent Quarter:	June 30, 2025	3.03%

Average Annual Total Returns (For the periods ended December 31, 2024)  

	1 Year	5 Years	10 Years
Fund	16.24%	12.44%	13.21%
S&P 500® Index (reflects no deduction for fees, expenses or taxes)	25.02%	14.53%	13.10%
Russell 1000® Growth Index (reflects no deduction for fees, expenses or taxes)	33.36%	18.96%	16.78%

Investment Adviser

The Fund's investment adviser is VALIC.

The Fund is subadvised by T. Rowe Price and JPMIM.

Portfolio Managers 

Name and Title	Portfolio Manager of the Fund Since
T. Rowe Price
Ann Holcomb, CFA Vice President	2025
Jason Nogueira, CFA, MBA Vice President	2025
Jason Polun, CFA, MBA Vice President	2025
JPMIM
Scott Davis, MBA Managing Director	2025
Shilpee Raina, CFA Executive Director	2025

Purchases and Sales of Fund Shares

Shares of the Funds may only be purchased or redeemed through Variable Contracts offered by the separate accounts of VALIC or other participating life insurance companies and through qualifying retirement plans ("Plans") and IRAs. Shares of each Fund may be purchased and redeemed each day the New York Stock Exchange is open, at the Fund's net asset value determined after receipt of a request in good order.

The Funds do not have any initial or subsequent investment minimums. However, your insurance company may impose investment or account value minimums. The prospectus (or other offering document) for your Variable Contract contains additional information about purchases and redemptions of the Funds' shares.

Tax Information

A Fund will not be subject to U.S. federal income tax so long as it qualifies as a regulated investment company and distributes its income and gains each year to its

Large Cap Core Fund (formerly, Large Capital Growth Fund)

shareholders. However, contractholders may be subject to federal income tax (and a federal Medicare tax of 3.8% that applies to net income, including taxable annuity payments, if applicable) upon withdrawal from a Variable Contract. Contractholders should consult the prospectus (or other offering document) for the Variable Contract for additional information regarding taxation.

Payments to Broker-Dealers and
Other Financial Intermediaries

The Funds are not sold directly to the general public but instead are offered to registered and unregistered