Harbor PanAgora Dynamic Large Cap Core ETF
 
 
INFO
 
Summary Prospectus – March 1, 2026 (as amended July 28, 2026)
Before you invest, you may want to review the Fund’s prospectus, which contains more information about the Fund and its risks. You can find the Fund’s prospectus and other information about the Fund online at harborcapital.com/prospectus. You can also get this information at no cost by calling 800-422-1050 or by sending an email request to funddocuments@harborcapital.com. If you purchase shares of the Fund through a financial intermediary, the prospectus and other information will also be available from your financial intermediary. The current prospectus and statement of additional information, dated March 1, 2026, as amended or supplemented from time to time, are incorporated by referenced into this summary prospectus and may be obtained, free of charge, at the website, phone number or email address noted above.
Investment Objective
The Fund seeks long-term total return.
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. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and example below.
 
Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
 
 
Rate
Management Fees
0.35%
Distribution and Service (12b-1) Fees
None
Other Expenses1
0.00%
Total Annual Fund Operating Expenses
0.35%
1  Pursuant to the Investment Advisory Agreement, the Advisor pays all of the operating expenses of the Fund, except for (i) the fee payment under the Investment Advisory Agreement; (ii) payments under the Fund’s 12b-1 plan (if any); (iii) the costs of borrowing, including interest and dividend expenses; (iv) taxes and governmental fees; (v) acquired fund fees and expenses; (vi) brokers’ commissions and any other transaction-related expenses and fees arising out of transactions effected on behalf of the Fund; (vii) costs of holding shareholder meetings; and (viii) litigation and indemnification expenses and other extraordinary expenses not incurred in the ordinary course of the Fund’s business.
 
Expense Example
This Expense Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other exchange-traded funds. The Expense Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Expense Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, under these assumptions, your costs would be: 
 
One
Year
Three
Years
Five
Years
Ten
Years
ETF
$36
$113
$197
$443
 
Portfolio Turnover
The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when shares of the Fund are held in a taxable account. These costs, which are not reflected in the Annual Fund Operating Expenses or in the Expense Example, do affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 53%. Portfolio turnover rate excludes
investments received or delivered from in-kind processing of creation unit purchases or redemptions.
Principal Investment Strategy
The Fund invests primarily in equity securities, principally common stocks and preferred stocks of large cap companies. Under normal circumstances, the Fund invests at least 80% of its net assets, plus borrowings for investment purposes, in securities of large cap companies.
The Fund defines large cap companies as those with market capitalizations that fall within the range of at least one of the following indexes: the Russell 1000 Index or the S&P 500 Index. As of December 31, 2025, the range of each Index was $1.03 billion to $4.53 trillion and $5.82 billion to $4.53 trillion, respectively, but each is expected to change frequently.
In managing the Fund’s portfolio, PanAgora Asset Management, Inc., the Fund’s subadvisor (“PanAgora” or the “Subadvisor”), employs a bottom-up approach that integrates fundamental and quantitative techniques with risk management tools. In evaluating and selecting investments for the Fund, PanAgora employs a proprietary framework using quantitative models that seeks to identify companies that offer above-market return potential based on certain metrics measuring a company’s financial and operational health. The Subadvisor believes that excess returns compared to the Fund’s benchmark, the S&P 500 Index (or “alpha”) can be generated over the long term by investing in high-quality companies with strong management and superior competitive edge, positive sentiment and/or attractive valuations. The Subadvisor seeks to generate excess returns using its proprietary alpha modeling approach that incorporates a diverse set of uncorrelated fundamentally and economically driven alpha factors related to each company’s financial and operational health to build a unique model for each stock within the investible universe. The Subadvisor maintains an inventory of alpha factors that fall into categories including, but not limited to, value, momentum, and quality factors. These factors seek to systematically capture fundamental business strength and qualities.
The Subadvisor also believes in the alpha generation potential of environmental, social and governance (“ESG”) factors. The Subadvisor utilizes tools and analyzes metrics that are designed to assess companies' ESG attributes to develop proprietary ESG alpha factors that are evaluated alongside the other alpha factors. The consideration of ESG alpha factors together with other alpha factors contributes to a company’s overall alpha score. The Subadvisor may rely on tools such as data sets that reflect corporate filings and earnings transcripts that the Subadvisor uses to capture different ESG attributes including board makeup and quality, integrity in communications to investors as well as resource efficiency, which is derived from alternative data sets. The ESG metrics and information used in the portfolio construction process may change over time and may not be relevant to all companies that are eligible for investment by the Fund. The Subadvisor’s proprietary alpha modeling tool is designed to systematically establish a tailored alpha forecast model for each company and
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Summary Prospectus
Harbor PanAgora Dynamic Large Cap Core ETF
adapts this forecast as a company’s fundamental characteristics evolve over time.
The Subadvisor then uses a proprietary optimization technique along with risk management tools to analyze stock weight decisions and select the portfolio that it believes maximizes alpha for a given level of risk. This optimization tool also analyzes several risk metrics, including, among others, tracking error relative to the Fund’s benchmark, market risk, and concentration risk.
The Fund primarily invests its assets in issuers located in the U.S. From time to time, the Fund may invest a significant portion of its assets in companies in one or more related industries or sectors.
The Fund is classified as non-diversified, which means the Fund may invest in the securities of a smaller number of issuers than a diversified fund.
Principal Risks
There is no guarantee that the investment objective of the Fund will be achieved. Stocks fluctuate in price and the value of your investment in the Fund may go down. This means that you could lose money on your investment in the Fund or the Fund may not perform as well as other investment options. Principal risks impacting the Fund (in alphabetical order after the first six risks) include:
Equity Risk: The values of equity securities may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. They may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. Equity securities generally have greater price volatility than fixed income securities.
Large Cap Risk: Large cap stocks may fall out of favor relative to small or mid cap stocks, which may cause the Fund to underperform other equity funds that focus on small or mid cap stocks. Large cap companies may be less able than smaller cap companies to adapt to changing market conditions and may be more mature and subject to more limited growth potential than smaller cap companies.
Large Shareholder Risk: Certain large shareholders including authorized participants (“AP”), third-party investors, the Advisor, the Subadvisor, affiliates of the Advisor or the Subadvisor, market makers, or other entities, including funds or accounts over which the Advisor or the Subadvisor, an affiliate of the Advisor or the Subadvisor or a third-party intermediary has investment discretion, such as those investing through one or more model portfolios, may from time to time own or control a substantial amount of the Fund’s shares. There is no requirement that these shareholders maintain their investment in the Fund. There is a risk that such large shareholders or that the Fund’s shareholders generally may redeem all or a substantial portion of their investments in the Fund in a short period of time, including as a result of an asset allocation decision made by the Advisor, the Subadvisor, an affiliate of the Advisor or Subadvisor or a third-party intermediary, which could have a significant negative impact on the Fund’s NAV, liquidity, and brokerage costs. Large redemptions could also result in tax consequences to shareholders and impact the Fund’s ability to implement its investment strategy. In addition, transactions by large shareholders may account for a large percentage of the trading
volume on the listing exchange and may, therefore, have a material upward or downward effect on the market price of the shares.
Market Risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political, regulatory or other developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Events such as war, military conflict, geopolitical disputes, acts of terrorism, social or political unrest, natural disasters, recessions, inflation, rapid interest rate changes, supply chain disruptions, tariffs and other restrictions on trade, sanctions, the spread of infectious illness or other public health threats, or the threat or potential of one or more such events and developments, could also significantly impact the Fund and its investments.
Model Risk: There are limitations inherent in every quantitative model. The value of securities selected using quantitative analysis can react differently to issuer, political, market, and economic developments than the market as a whole or securities selected using only fundamental analysis. The factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value. In addition, historical trends in data may not be predictive going forward. The strategies and techniques employed in a quantitative model cannot fully match the complexity of the financial markets and therefore sudden unanticipated changes in underlying market conditions can significantly impact their performance. The effectiveness of the given strategy or technique may deteriorate in an unpredictable fashion for any number of reasons including, but not limited to, an increase in the amount of assets managed or the use of similar strategies or techniques by other market participants and/or market dynamic shifts over time. In addition, factors that affect a security’s value can change over time, and these changes may not be reflected in the quantitative model. Any model may contain flaws the existence and effect of which may be discovered only after the fact or not at all. There can be no assurances that the strategies pursued or the techniques implemented in the quantitative model will be profitable, and various market conditions may be materially less favorable to certain strategies than others. Even in the absence of flaws, a model may not perform as anticipated.
Risks Associated with Exchange-Traded Funds: As an ETF, the Fund is subject to the following risks:
Authorized Participant Concentration/Trading Risk: Only authorized participants (“APs”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as APs and such APs have no obligation to submit creation or redemption orders. Consequently, there is no assurance that APs will establish or maintain an active trading market for the shares. This risk may be heightened to the extent that securities held by the Fund are traded outside a collateralized settlement system. In that case, APs may be required to post collateral on certain trades on an agency basis (i.e., on behalf of other market participants), which only a limited number of APs may be able to do. In addition, to the extent that APs exit the business or are unable to proceed with creation and/or redemption orders with respect to the Fund and no other AP is able to step forward to create or redeem Creation Units (as defined below), this may result in a significantly diminished trading market for shares, and shares may be more likely to trade at a premium or discount to the Fund’s net asset value and to face trading halts and/or delisting. This risk may be heightened during periods of volatility or market disruptions.
Cash Transactions Risk: The Fund may effect some or all of its creations and redemptions for cash rather than in-kind. As a result, an investment in the Fund may be less tax-efficient than an investment in an ETF that effects all of its creations and redemptions
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Summary Prospectus
Harbor PanAgora Dynamic Large Cap Core ETF
in-kind. Because the Fund may effect redemptions for cash, it may be required to sell portfolio securities in order to obtain the cash needed to distribute redemption proceeds. A sale of portfolio securities may result in capital gains or losses and may also result in higher brokerage costs. To the extent costs are not offset by transaction fees charged by the Fund to APs, the costs of cash transactions will be borne by the Fund.
Large Shareholder Risk: Certain large shareholders, including APs, may from time to time own a substantial amount of the Fund’s shares. There is no requirement that these shareholders maintain their investment in the Fund. There is a risk that such large shareholders or that the Fund’s shareholders generally may redeem all or a substantial portion of their investments in the Fund in a short period of time, which could have a significant negative impact on the Fund’s NAV, liquidity, and brokerage costs. Large redemptions could also result in tax consequences to shareholders and impact the Fund’s ability to implement its investment strategy. In addition, transactions by large shareholders may account for a large percentage of the trading volume on the listing exchange and may, therefore, have a material upward or downward effect on the market price of the shares.
Premium/Discount Risk: The market price of the Fund’s shares will generally fluctuate in accordance with changes in the Fund’s net asset value as well as the relative supply of and demand for shares on the Exchange. The Advisor cannot predict whether shares will trade below, at or above their net asset value because the shares trade on the Exchange at market prices and not at net asset value. Price differences may be due, in large part, to the fact that supply and demand forces at work in the secondary trading market for shares will be closely related, but not identical, to the same forces influencing the prices of the holdings of the Fund trading individually or in the aggregate at any point in time. This may result in the Fund’s shares trading significantly above (premium) or below (discount) the Fund’s net asset value, which will be reflected in the intraday bid/ask spreads and/or the closing price of shares as compared to net asset value. However, given that shares can only be purchased and redeemed in Creation Units to and from broker-dealers and large institutional investors that have entered into participation agreements (unlike shares of closed-end funds, which frequently trade at appreciable discounts from, and sometimes at premiums to, their net asset value), the Advisor believes that large discounts or premiums to the net asset value of shares should not be sustained. During stressed market conditions, the market for the Fund’s shares may become less liquid in response to deteriorating liquidity in the market for the Fund’s underlying portfolio holdings, which could in turn lead to differences between the market price of the Fund’s shares and their net asset value.
ESG Factors Risk: The consideration of ESG factors by the Subadvisor could cause the Fund to perform differently than other funds. ESG factors are not the only consideration used by the Subadvisor in making investment decisions for the Fund and the Fund may invest in a company that scores poorly on ESG factors if it scores well on other criteria. ESG factors may not be considered for every investment decision.
Issuer Risk: An adverse event affecting a particular issuer in which the Fund is invested, such as an unfavorable earnings report, may depress the value of that issuer’s securities, sometimes rapidly or unpredictably.
New Fund Risk: There can be no assurance that the Fund will grow to or maintain an economically viable size, in which case the Board of Trustees may determine to liquidate the Fund. The Board of Trustees may liquidate the Fund at any time in accordance with the Declaration of Trust and governing law. As a result, the timing of the Fund’s liquidation may not be favorable.
Non-Diversification Risk: Because the Fund is non-diversified and may invest a greater percentage of its assets in securities of a single issuer, and/or invest in a relatively small number of issuers, it is more susceptible to risks associated with a single economic, political or regulatory occurrence than a more diversified portfolio.
Preferred Stock Risk: Preferred stocks in which the Fund may invest are sensitive to interest rate changes, and are also subject to equity risk, which is the risk that stock prices will fall over short or extended periods of time. The rights of preferred stocks on the distribution of a company’s assets in the event of a liquidation are generally subordinate to the rights associated with a company’s debt securities.
Sector Risk: Because the Fund may, from time to time, be more heavily invested in particular sectors, the value of its shares may be especially sensitive to factors and economic risks that specifically affect those sectors. As a result, the Fund’s share price may fluctuate more widely than the value of shares of a mutual fund that invests in a broader range of sectors.
Selection Risk: The Subadvisor’s judgment about the attractiveness, value and growth potential of a particular security may be incorrect, which may cause the Fund to underperform. Additionally, the Subadvisor potentially will be prevented from executing investment decisions at an advantageous time or price as a result of domestic or global market disruptions, particularly disruptions causing heightened market volatility and reduced market liquidity, as well as increased or changing regulations.  Thus, investments that a Subadvisor believes represent an attractive opportunity or in which the Fund seeks to obtain exposure may be unavailable entirely or in the specific quantities or prices sought by a Subadvisor and the Fund may need to obtain the exposure through less advantageous or indirect investments or forgo the investment at the time.
Performance
The following bar chart and tables are intended to help you understand the risks and potential rewards of investing in the Fund. The bar chart shows how the performance of the Fund has varied from one calendar year to another over the periods shown. The table shows how the Fund’s average annual total returns compare to the returns of the Fund’s benchmark index, which includes securities with investment characteristics similar to those held by the Fund. Please note that the Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. To obtain updated performance information please visit the Fund’s website at harborcapital.com or call 800-422-1050.
 
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Summary Prospectus
Harbor PanAgora Dynamic Large Cap Core ETF
Calendar Year Total Returns
  
During the time period shown in the bar chart, the Fund’s highest and lowest returns for a calendar quarter were: 
 
Total Returns
Quarter/Year
Best Quarter
12.87%
Q2 2025
Worst Quarter
-5.50%
Q1 2025
 
Average Annual Total Returns — As of December 31, 2025
 
 
One
Year
Annualized
Inception
Date
Since
Inception
Harbor PanAgora Dynamic Large Cap Core ETF
Before Taxes
19.54%
17.68%
10/09/2024
After Taxes on Distributions
19.44%
17.56%
After Taxes on Distributions and
Sale of Fund Shares
11.64%
13.52%
Comparative Index
(reflects no deduction for fees, expenses or taxes)
S&P 500 Index
17.88%
16.02%
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns will depend on a shareholder’s individual tax situation and may differ from those shown. The after-tax returns shown are not relevant to tax-exempt shareholders or shareholders who hold their Fund shares through a tax-deferred arrangement, such as a 401(k) plan or individual retirement account. In some cases, average annual total return “After Taxes on Distributions and Sale of Fund Shares” may exceed the return “Before Taxes” and/or “After Taxes on Distributions” due to an assumed tax benefit for any losses on a sale of Fund shares at the end of the measurement period.
Portfolio Management
Investment Advisor
Harbor Capital Advisors, Inc.
 
Subadvisor
PanAgora Asset Management, Inc. (“PanAgora”) has subadvised the Fund since 2024.
 
Portfolio Managers
The portfolio managers are jointly and primarily responsible for the day-to-day investment decision making for the Fund. 
 
 
Jaime H. Lee, Ph.D.
PanAgora Asset Management, Inc.
Dr. Lee is a Managing Director and the Head of Dynamic Equity Investments at PanAgora and has served as a portfolio manager for the Fund since 2024. Dr. Lee will serve as a portfolio manager for the Fund until her retirement from PanAgora on December 31, 2026. 
 
 
George D. Mussalli, CFA
PanAgora Asset Management, Inc.
Mr. Mussalli is the Global Chief Investment Officer at PanAgora and has served as a portfolio manager for the Fund since 2024.
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Summary Prospectus
Harbor PanAgora Dynamic Large Cap Core ETF
Buying and Selling Fund Shares
Individual Fund shares may only be bought and sold in the secondary market through a broker or dealer at a market price. Shares of the Fund are listed and traded on an exchange at market price throughout the day rather than at NAV and may trade at a price greater than the Fund’s NAV (premium) or less than the Fund’s NAV (discount). An investor may incur costs attributable to the difference between the highest price a buyer is willing to pay to purchase shares (bid) and the lowest price a seller is willing to accept for shares (ask) when buying or selling Fund shares in the secondary market (the “bid-ask spread”). Recent information, including information regarding the Fund’s NAV, market price, premiums and discounts, and bid-ask spread, is available at harborcapital.com.
Tax Information
Distributions you receive from the Fund are subject to federal income tax and may also be subject to state and local taxes. These distributions will generally be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred retirement account, such as a 401(k) plan or individual retirement account. Investments in tax-deferred accounts may be subject to tax when they are withdrawn.
Payments to Broker-Dealers and Other Financial Intermediaries
The Advisor and/or its related companies have in the past and could in the future pay intermediaries, which may include banks, broker-dealers, or financial professionals, for marketing activities and presentations, educational training programs, conferences, the development of technology platforms and reporting systems and data or other services related to the sale of Fund shares and related services. These payments create a conflict of interest by influencing the broker-dealer or other intermediary and your sales representative to recommend the Fund over another investment. Ask your sales representative or visit your financial intermediary’s website for more information.
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Summary Prospectus
HARBOR PANAGORA DYNAMIC LARGE CAP CORE ETF
March 1, 2026 (as amended July 28, 2026) 
Exchange
Ticker
 
NYSE
INFO
 
ETF.SP.INFO.0726
111 South Wacker Drive, 34th Floor
Chicago, IL 60606-4302