Mutual Fund Summary Prospectus (497k)

Harbor Global Growth Fund

Summary Prospectus - March 1, 2013

Institutional Class HGGAX

Administrative Class HRGAX

Investor Class HGGIX

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 www.harborfunds.com/prospectus. You can also get this information at no cost by calling 800-422-1050 or by sending an e-mail request to funddocuments@harborfunds.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, 2013, are incorporated by referenced into this summary prospectus and may be obtained, free of charge, at the website, phone number or e-mail address noted above.

Investment Objective

The Fund seeks 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 and hold shares of the Fund.

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


	Institutional Class	Administrative Class	Investor Class
Management Fees ¹	0.85%	0.85%	0.85%
Distribution and/or Service (12b-1) Fees	None	0.25%	0.25%
Other Expenses	0.75%	0.75%	0.87%
Total Annual Fund Operating Expenses	1.60%	1.85%	1.97%
Fee Waiver and Expense Reimbursement ^1,2	0.70%	0.70%	0.70%
Total Annual Fund Operating Expenses After Fee Waiver and Expense Reimbursement ¹ ^,2	0.90%	1.15%	1.27%

The Adviser has contractually agreed to reduce the management fee to 0.75% through February 28, 2014. Only the Board of Trustees may modify or terminate this agreement.

The Adviser has contractually agreed to limit the Fund’s operating expenses through February 28, 2014. Only the Board of Trustees may modify or terminate this agreement.

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. The 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
Institutional	$	92	$	436	$	805	$	1,841
Administrative	$	117	$	514	$	935	$	2,112
Investor	$	129	$	551	$	998	$	2,239

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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. The Fund’s portfolio turnover rate in the most recent fiscal year was 91%.

Principal Investment Strategy

Principal Style Characteristics: Companies throughout the world selected for long-term growth potential

The Fund invests primarily in common stocks of U.S. and foreign companies that are selected for their long-term growth potential. The Fund may invest in companies of any size that are economically tied to any countries or markets throughout the world, including companies economically tied to emerging markets. Under normal market conditions, the Fund invests significantly (generally, at least 40% of its net assets) in the securities of issuers economically tied to foreign countries (unless market conditions are not deemed favorable by the Subadviser, in which case the Fund generally will invest less than 40%, but at least 30%, of its assets in such foreign securities). The Fund will invest its assets in various regions and countries, including the U.S., that encompass not less than three different countries overall.

In selecting investments for the Fund, the Subadviser uses an approach that combines “top-down” macro-economic analysis with “bottom-up” security selection. The “top-down” approach may take into consideration macro-economic factors such as, without limitation, interest rates, inflation, monetary policy, fiscal policy, currency movements, demographic trends, the regulatory environment, and the global competitive landscape. The Subadviser may also examine other factors that may include, without limitation, the most attractive global investment opportunities, industry consolidation and the sustainability of financial trends. Through this “top-down” analysis, the Subadviser seeks to identify sectors, industries and companies that may benefit from the overall trends the Subadviser has observed.

The Subadviser then looks for individual companies or securities (including, without limitation, equity securities and fixed or variable income securities) that are expected to offer earnings growth potential that may not be recognized by the market at large. In determining whether a particular company or security may be a suitable investment, the Subadviser may focus on any of a number of different attributes that may include, without limitation, the company’s specific market expertise or dominance; its franchise durability and pricing power; solid fundamentals (e.g., a strong balance sheet, improving returns on equity, the ability to generate free cash flow, apparent use of conservative accounting standards, and transparent financial disclosure); strong and ethical

Summary Prospectus

HARBOR GLOBAL GROWTH FUND

management; commitment to shareholder interests; reasonable valuations in the context of projected growth rates; current income; and other indications that a company or security may be an attractive investment prospect. This process is called “bottom-up” security selection.

As part of this fundamental, “bottom-up” research, the Subadviser may visit with a company’s management and conduct other research to gain thorough knowledge of the company. The Subadviser also may prepare earnings and cash flow models of companies. These models may assist the Subadviser in projecting potential earnings growth, current income and other important company financial characteristics under different scenarios. Each model is typically customized to follow a particular company and is generally intended to replicate and describe a company’s past, present and potential future performance. The models may include quantitative information and narratives that reflect current interpretations of corporate data and company and industry developments. The core investments of the Fund (i.e., the primary investments held by the Fund over time) generally may include established companies and securities that are expected to offer long-term growth potential. However, the Fund’s portfolio also may include securities of less mature companies, securities with more aggressive growth characteristics, and securities of companies undergoing significant positive developments, such as, without limitation, the introduction of a new product line, the appointment of a new management team, or an acquisition.

The Subadviser may reduce or sell the Fund’s investments in portfolio securities if, in the opinion of the Subadviser, a security’s fundamentals change substantially, its price appreciation leads to substantial overvaluation in relation to the Subadviser’s estimates of future earnings and cash flow growth, or for other reasons.

Principal Risks

There is no guarantee that the investment objective of the Fund will be achieved. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. 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 possible investments. Principal risks include:

Market and Issuer risk: Securities markets are volatile and can decline significantly in response to adverse market, economic, political or regulatory developments, which may lower the value of securities held by the Fund, sometimes rapidly or unpredictably. Additionally, an adverse event, such as an unfavorable earnings report, may depress the value of a particular company’s stock.

Growth style risk: Over time, a growth oriented investing style may go in and out of favor, which may cause the Fund to underperform other equity funds that use different investing styles.

Selection risk: The Subadviser’s judgment about the attractiveness, value and potential appreciation of a particular security may be incorrect.

Foreign securities risk: Because the Fund invests primarily in securities of foreign issuers, an investment in the Fund is subject to special risks in addition to those of U.S. securities. These risks include heightened political and economic risks, greater volatility, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, and less stringent investor protection and disclosure standards of foreign markets. Foreign securities are sometimes less liquid and harder to value than securities of U.S. issuers. The securities markets of many foreign countries are relatively small, with a limited number of companies representing a small number of industries. If foreign securities are denominated and traded in a foreign currency, the value of the Fund’s foreign holdings can be affected by currency exchange rates and exchange control regulations. The Fund’s investments in foreign securities may also be subject to foreign withholding taxes.

The recent global economic crisis brought several European governments close to bankruptcy and many other economies into recession and weakened the banking and financial sectors of many countries. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market.

Emerging market risk: Foreign securities risks are more significant in emerging market countries, such as those in Eastern Europe, Latin America and the Pacific Basin. These countries may have relatively unstable governments and less-established market economies than developed countries. Emerging markets may face greater social, economic, regulatory and political uncertainties. These risks make emerging market securities more volatile and less liquid than securities issued in more developed countries.

Performance

The following bar chart and table show two aspects of the Fund: volatility and performance. The bar chart shows the volatility — or variability — of the Fund’s annual total returns over time, and shows that Fund performance can change from year to year. The table shows the Fund’s average annual total returns for certain time periods compared to the returns of a broad-based securities index. The bar chart and table provide some indication of the risks and potential rewards of investing in the Fund. 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 www.harborfunds.com or call 800-422-1050.

Calendar Year Total Returns for Institutional Class Shares

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Summary Prospectus

HARBOR GLOBAL GROWTH FUND

The Fund’s best and worst calendar quarters during this time period were:


	Total Return		Quarter/Year
Best Quarter		21.97%		1st/2012
Worst Quarter		-21.13%		3rd/2011

Average Annual Total Returns — As of December 31, 2012

One
Year

Five
Years

Ten
Years

Life of
Fund

Institutional Class (inception date 03-01-2009)

Before Taxes

20.84%

N/A

23.16%

After Taxes on Distributions

20.30%

N/A

21.47%

After Taxes on Distributions and Sale of Fund Shares

14.27%

N/A

19.61%

Administrative Class (inception date 03-01-2009)

Before Taxes

20.51%

N/A

22.85%

Investor Class (inception date 03-01-2009)

Before Taxes

20.40%

N/A

22.70%

Comparative Index
(reflects no deduction for fees, expenses or taxes)

MSCI AC World Index

16.13%

N/A

19.46%

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 depend on a shareholder’s 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 tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown for Institutional Class shares only. After-tax returns for the Administrative and Investor Class shares will vary.

Portfolio Management

Investment Adviser

Harbor Capital Advisors, Inc.

Subadviser

Marsico Capital Management, LLC has subadvised the Fund since its inception in 2009.

Portfolio Managers



		Thomas Marsico Marsico Capital Management, LLC

Mr. Marsico is the Chief Investment Officer of Marsico Capital Management and has co-managed the Fund since its inception in 2009.
		James Gendelman Marsico Capital Management, LLC

Mr. Gendelman is a Portfolio Manager and Senior Analyst at Marsico Capital Management and has co-managed the Fund since its inception in 2009.

Buying and Selling Fund Shares

Shareholders may purchase or sell (redeem) Fund shares on any business day (normally any day the New York Stock Exchange is open). You may conduct transactions by mail, by telephone or through our website.


By Mail		Harbor Funds P.O. Box 804660 Chicago, IL 60680-4108
By Telephone		800-422-1050
By Visiting Our Website		www.harborfunds.com

Investors who wish to purchase, exchange or redeem shares held through a financial intermediary should contact the financial intermediary directly.

The minimum initial investment amounts are shown below. The minimums may be reduced or waived in some cases. There are no minimums for subsequent investments.


Type of Account	Institutional Class		Administrative Class*		Investor Class
Regular	$	50,000	$	50,000	$	2,500
Individual Retirement Account (IRA)	$	50,000		N/A	$	1,000
Custodial (UGMA/UTMA)	$	50,000		N/A	$	1,000

Limited only to eligible retirement plans and financial intermediaries. There is no minimum investment for qualified retirement plans and Section 457 plans.

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

If you purchase the Fund through a broker-dealer or other financial intermediary, the Fund and/or its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may 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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