Summary Prospectus by Investment Company (Form 497K)

Annual Fund Operating Expenses

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

Management Fees⁽¹⁾

Distribution and Service (12b-1) Fees

Other Expenses⁽²⁾

Total Annual Fund Operating Expenses

Less Waivers⁽¹⁾

Net Annual Fund Operating Expenses

Olive Street Investment Advisers, LLC (the "Adviser") has contractually agreed, until at least October 28, 2026, to waive its management fees to the extent management fees to be paid to the Adviser exceed the management fees the Fund is required to pay the Fund's sub-advisers (i.e., the Adviser does not receive any management fees from the Fund as a result of its waivers). This contractual agreement may not be terminated by the Adviser without the consent of the Board of Trustees (the "Board") of Bridge Builder Trust (the "Trust"), except that the Adviser may terminate the agreement upon written notice to the Trust, effective as of the end of the expense limitation period ending October 28, 2026, if written notice is provided to the Trust by or before a date agreed to by the Board. Such waivers are not subject to reimbursement by the Fund.

Other Expenses include acquired fund fees and expenses less than 0.01%.

Market Risk. The overall market may perform poorly or the returns from the securities in which the Fund invests may underperform returns from the general securities markets, a particular securities market, or other types of investments. A variety of factors can influence underperformance and can have a significant impact on the Fund and its investments, including regulatory events, inflation, interest rates, government defaults, government shutdowns, war, regional conflicts, acts of terrorism, social unrest, the imposition of tariffs, trade disputes and substantial economic downturn or recessions. In addition, the impact of any epidemic, pandemic, natural disaster, spread of infectious illness or other public health issue, or widespread fear that such events may occur, could negatively affect the global economy, as well as the economies of individual countries, the financial performance of individual companies and sectors, and the markets in general in significant and unforeseen ways. Any such impact could adversely affect the prices and liquidity of the securities and other instruments in which the Fund invests, which in turn could negatively impact the Fund's performance and cause losses on your investment in the Fund.

Interest Rate Risk. The value of fixed income securities may decline because of increases in interest rates or rise because of decreases in interest rates. The value of a fixed income security with greater duration will be more sensitive to changes in interest rates than a similar security with shorter duration. The prices of fixed income securities with shorter duration generally will be less affected by changes in interest rates than the prices of fixed income securities with greater duration. A low interest rate environment may present greater interest rate risk because there may be a greater likelihood of rates increasing and rates may increase more rapidly. Fluctuations in

interest rates may also affect the liquidity of the fixed-income securities held by the Fund. As a result, it is possible that the Fund would, during these conditions, maintain a substantial portion of its assets in cash, on which it may earn little, if any, income. Changes in monetary policy made by central banks and/or their governments or changes in economic conditions may affect the level of interest rates, which could have sudden or unpredictable effects on the markets. A sudden or unpredictable rise or decline in interest rates may cause volatility and reduced liquidity in the markets, which could make it more difficult for the Fund to sell its investments at a time when it may be advantageous to do so and could cause the value of the Fund's investments to decline, potentially suddenly and significantly.

Credit Risk. Credit risk is the risk that the issuer of a bond will fail to make payments when due or default completely. If the issuer of the bond experiences an actual or anticipated deterioration in credit quality, the price of the bond may be negatively impacted. The degree of credit risk depends on the financial condition of the issuer and the terms of the bond.

Asset-Backed, Mortgage-Related, and Mortgage-Backed Securities Risk. Borrowers may default on the obligations that underlie ABS, mortgage-related securities, and MBS. During periods of rising interest rates, the Fund may be subject to extension risk and may receive principal later than it had expected, causing the Fund to experience additional volatility. During periods of falling interest rates, ABS, mortgage-related securities, and MBS may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. CMOs, MBS, ARMs, IOs, POs, and inverse floaters may be more volatile and may be more sensitive to interest rate changes and prepayments than other mortgage-related securities. The impairment of the value of the collateral underlying a security in which the Fund invests (due, for example, to non-payment of loans) may result in a reduction in the value of the security. The risk of default, as described under "Credit Risk," for privately-issued and sub-prime mortgages is generally higher than for other types of MBS. The structure of some of these securities may be complex, and there may be less available information than other types of debt securities. In addition, ABS such as CLOs and CDOs present credit risks that are not presented by MBS. This is because ABS generally do not have the benefit of a security interest in collateral that is comparable in quality to mortgage assets. If the issuer of an ABS defaults on its payment obligations, there is the possibility that, in some cases, the Fund will be unable to possess and sell the underlying collateral and that the Fund's recoveries on repossessed collateral may not be available to support payments on the security.

Active Management Risk. The Fund is actively managed with discretion and may underperform market indices, including relevant benchmark indices, or other mutual funds with similar investment objectives. In addition, to the extent that a Sub-adviser's investment strategy uses a quantitative investment model to evaluate and recommend investment decisions for the Fund, the Fund can perform differently from the market as a whole based on the factors used in the model, the weight placed on each factor and changes from the factors' historical trends.

Convertible Securities Risk. The value of a convertible security will generally decline as interest rates increase and increase as interest rates decline. Convertible securities are also subject to credit risk. In addition, because convertible securities are generally convertible to the issuer's common stock, convertible security prices will normally fluctuate as prices of the common stock increase or decline.

Corporate Debt Securities Risk. Corporate debt securities respond to economic developments, especially changes in interest rates, as well as perceptions of the creditworthiness and business prospects of individual issuers.

Counterparty Risk. When the Fund enters into an investment contract, such as a derivative or a repurchase agreement, the Fund is exposed to the risk that the other party may be unable or unwilling to fulfill its obligations, which could adversely impact the value of the Fund.

Currency Risk. As a result of the Fund's investments in securities or other investments denominated in, and/or receiving revenues in, foreign currencies, the Fund will be subject to currency risk. Currency risk is the risk that foreign currencies will decline in value relative to the U.S. dollar, adversely affecting the value of the Fund.

Derivatives Risk. An investment in derivatives (such as futures contracts, swaps, TBAs and dollar rolls) may not perform as anticipated by the Sub-advisers, may not be able to be closed out at a favorable time or price, or may increase the Fund's volatility. Derivatives may create investment leverage so that when a derivative is used as a substitute for or alternative to a direct cash investment, the transaction may not provide a return that corresponds

precisely with that of the cash investment, or when used for hedging purposes, the derivative may not provide the anticipated protection, causing the Fund to lose money on both the derivative and the exposure the Fund sought to hedge. Increases and decreases in the value of the Fund's portfolio may be magnified when the Fund uses leverage. Derivatives are also subject to correlation risk, which is the risk that changes in the value of the derivative may not correlate perfectly with the underlying asset, rate, or index. The Fund's use of derivatives is also subject to market risk, which is described above, and liquidity risk, which is described below. The Fund's use of swaps is also subject to counterparty risk, which is described above.

Floating Rate Securities Risk. The Fund may invest in obligations with interest rates that are reset periodically. Although the prices of floating rate securities are generally less sensitive to interest rate changes than comparable quality fixed rate instruments, the value of floating rate securities may decline if the floating rate securities' interest rates do not rise as quickly, or as much, as general interest rates.

Foreign Securities Risk (including Emerging Markets Risk). The risks of investing in foreign securities, including those in emerging markets, can increase the potential for losses in the Fund and may include currency risk, political and economic instability, terrorism, armed conflicts and other geopolitical events, additional or fewer government regulations, the imposition of tariffs and other restrictions on trade or economic sanctions, less publicly available information, limited trading markets, differences in financial reporting standards, fewer protections for passive investors, and less stringent regulation of securities markets. Geopolitical or other events such as nationalization or expropriation could cause the loss of the Fund's entire investment in one or more countries. In addition, periodic U.S. Government prohibitions on investments in issuers from certain foreign countries may require the Fund to sell such investments at inopportune times, which could result in losses to the Fund. The risks associated with international investing will be greater in emerging markets than in more developed foreign markets because, among other things, emerging markets may have less stable political and economic environments and may have fewer resources to mitigate the effects of a pandemic or natural disaster.

Investment Company and Exchange-Traded Fund Risk. An investment company, including an ETF, in which the Fund invests may not achieve its investment objective or execute its investment strategies effectively. Large purchase or redemption activity by shareholders of such an investment company might negatively affect the value of the investment company's shares. The Fund must also pay its pro rata portion of an investment company's fees and expenses.

Investment Strategy Risk. There is no assurance the Fund's investment objective will be achieved. Investment decisions may not produce the expected results. The value of the Fund may decline, and the Fund may underperform other funds with similar objectives or strategies.

Issuer-Specific Risk. The value of an individual security or particular type of security can be more volatile than, and can perform differently from, the market as a whole or other similar securities.

Liquidity Risk. Low trading volume, a lack of a market maker, or contractual or legal restrictions may limit the Fund's ability to value securities or prevent the Fund from selling securities or closing derivative positions at desirable times or prices.

Mortgage Dollar Roll Risk. The use of mortgage dollar rolls is a speculative technique involving leverage and can have an economic effect similar to borrowing money for investment purposes. Mortgage dollar roll transactions involve the risk that the market value of the securities the Fund is required to purchase may decline below the agreed upon repurchase price of those securities. If the broker-dealer to whom the Fund sells securities becomes insolvent, the Fund's right to purchase or repurchase securities may be restricted. Successful use of mortgage dollar rolls may depend upon a Sub-adviser's ability to correctly predict interest rates and prepayments.

Multi-Manager and Multi-Style Management Risk. The Fund allocates its assets to multiple Sub-advisers believed to have complementary styles. These investment styles, at times, may not be complementary and could result in more exposure to certain types of securities. Because portions of the Fund's assets are managed by different Sub-advisers using different styles, the Fund could engage in overlapping or conflicting securities transactions. Overlapping transactions could lead to multiple Sub-advisers purchasing the same or similar securities at the same time, potentially leading to the Fund holding a more concentrated position in these securities. Conversely, certain Sub-advisers may be purchasing securities at the same time other Sub-advisers may be selling those same securities, which may lead to higher transaction expenses compared to a fund using a single investment management style.

Portfolio Turnover Risk. The Fund may buy and sell investments frequently. Such a strategy often involves higher transaction costs, including brokerage commissions, and may increase the amount of capital gains (in particular, short-term gains) realized by the Fund. Shareholders may pay tax on such capital gains.

Preferred Stock Risk. Preferred stocks are nonvoting equity securities that pay a stated fixed or variable rate of return. Preferred stocks are subject to issuer-specific risks (such as credit risk) and market risks applicable generally to equity securities. The market value of preferred stocks generally decreases when interest rates rise. Preferred stocks generally are subordinated to bonds and other debt instruments in a company's capital structure in terms of priority to corporate income and liquidation payments and, therefore, will be subject to greater credit risk than the company's bonds and other debt instruments. Preferred stock may also be subject to prepayment risk, which is discussed below.

Prepayment and Extension Risk. When interest rates fall, issuers of high interest debt obligations, as well as issuers of callable bonds, may pay off the debts earlier than expected (prepayment risk), and the Fund may have to reinvest the proceeds at lower yields. When interest rates rise, issuers of lower interest debt obligations may pay off the debts later than expected (extension risk), thus keeping the Fund's assets tied up in lower interest debt obligations.

Privately Issued Securities Risk. Investments in privately issued securities (e.g., Rule 144A securities) may be less liquid than in publicly traded securities. Although these securities may be resold in privately negotiated transactions, the prices realized from these sales could be less than those originally paid by the Fund or less than what may be considered the fair value of such securities. Furthermore, companies with securities that are not publicly traded are not subject to the disclosure and other investor protection requirements that might be applicable if the securities were publicly traded.

Redemption Risk. The Fund may experience losses or realize taxable gains when selling securities to meet redemption requests. This risk is greater for larger redemption requests or redemption requests during adverse market conditions. Large redemptions of the Fund's shares may force the Fund to sell securities at times when it would not otherwise do so and may cause the Fund's portfolio turnover rate and transaction costs to rise, which may negatively affect the Fund's performance and have adverse tax consequences for Fund shareholders.

Regulatory and Judicial Risk. The regulation of security markets, transactions and portfolio companies is subject to change. Such regulatory changes and judicial actions could have a substantial adverse effect on the Fund's performance.

Reinvestment Risk. Cash flows from fixed income securities are generally reinvested at current market rates. A decline in market rates may result in less attractive reinvestment opportunities and affect the Fund's ability to meet its investment objective.

Sovereign Debt Risk. Investments in non-U.S. sovereign debt securities can involve a high degree of risk, including the risk that the governmental entity that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or to pay the interest on its sovereign debt in a timely manner.

U.S. Government Securities Risk. U.S. government obligations are affected by changes or expected changes in interest rates, among other things. While U.S. Treasury obligations are backed by the full faith and credit of the U.S. government, such obligations are still subject to credit risk. Securities issued or guaranteed by federal agencies or authorities or U.S. government sponsored instrumentalities or enterprises may or may not be backed by the full faith and credit of the U.S. government. Moreover, some securities are neither insured nor guaranteed by the U.S. government. The U.S. Department of the Treasury has the authority to provide financial support to certain of these debt obligations, but no assurance can be given that the U.S. government will do so. From time to time, controversy or uncertainty regarding the status of negotiations in the U.S. government to increase the statutory debt ceiling and/or failure to increase the statutory debt ceiling could increase the risk that the U.S. government may default on payments on certain U.S. government securities (including those held by the Fund), cause the credit rating of the U.S, government to be downgraded or increase volatility in financial markets, result in higher interest rates, reduce prices of U.S. Treasury securities and/or increase the costs of certain kinds of debt, all of which could have a material adverse impact on the Fund.

Valuation Risk. Certain investments held by the Fund are generally valued using evaluated prices provided by third-party independent pricing services or, in some cases, using evaluated prices provided by dealers or the

Adviser's valuation committee using fair valuation methodologies. The evaluated prices used by the Fund may be different from the evaluated prices or fair value used by other mutual funds or from the evaluated prices at which certain Fund's investments are actually bought and sold. The evaluated prices and fair value of certain Fund's investments may be subject to frequent and significant change and will vary depending on the information that is available to the pricing services providing the evaluated prices and the Adviser when it determines the fair value of the investments.

When-Issued, Delayed Delivery, and Forward Commitment Transactions Risk. When-issued transactions, delayed delivery purchases, and forward commitments involve a risk of loss if the value of the securities declines prior to the settlement date. Therefore, these transactions may result in a form of leverage and increase the Fund's overall investment exposure. When the Fund has sold a security on a when-issued, delayed delivery, or forward commitment basis, the Fund does not participate in future gains or losses with respect to the security. These transactions are also subject to counterparty risk, which is described above.

Quarterly Returns

Highest (quarter ended December 31, 2023)

Lowest (quarter ended March 31, 2022)

Return Before Taxes

Return After Taxes on Distributions

Return After Taxes on Distributions and Sale of Fund Shares

Bloomberg U.S. Aggregate Bond Index (reflects no deductions for fees, expenses or taxes)

Baird

Length of Service

to the Fund

Founder and Managing Director, Chief Investment Officer Emeritus

Founder and Managing Director, Senior Portfolio Manager

Managing Director, Co-Chief Investment Officer

Managing Director, Co-Chief Investment Officer, Research Director

Managing Director, Senior Portfolio Manager

Managing Director, Co-Lead Securitized Sector, Senior Portfolio Manager

Managing Director, Lead Credit Sector, Senior Portfolio Manager

JPMIM

Length of Service

to the Fund

Managing Director

Managing Director

Managing Director

Managing Director

Loomis Sayles

Length of Service

to the Fund

Portfolio Manager and Co-Head of the Disciplined Alpha Team

Portfolio Manager and Co-Head of the Disciplined Alpha Team

PGIM

Length of Service

to the Fund

Managing Director and Senior Portfolio Manager

Managing Director and Co-Chief Investment Officer

Principal and Portfolio Manager

Principal and Portfolio Manager