UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

Investment Company Act File Number: 811-05833

T. Rowe Price Institutional International Funds, Inc.

(Exact name of registrant as specified in charter)

100 East Pratt Street, Baltimore, MD 21202

(Address of principal executive offices)

David Oestreicher

100 East Pratt Street, Baltimore, MD 21202

(Name and address of agent for service)

Registrant’s telephone number, including area code: (410) 345-2000

Date of fiscal year end: October 31

Date of reporting period: April 30, 2017

The views and opinions in this report were current as of April 30, 2017. They are not guarantees of performance or investment results and should not be taken as investment advice. Investment decisions reflect a variety of factors, and the managers reserve the right to change their views about individual stocks, sectors, and the markets at any time. As a result, the views expressed should not be relied upon as a forecast of the fund’s future investment intent. The report is certified under the Sarbanes-Oxley Act, which requires mutual funds and other public companies to affirm that, to the best of their knowledge, the information in their financial reports is fairly and accurately stated in all material respects.

Emerging markets stocks rallied over the past six months amid signs of economic recovery worldwide. Improved investor sentiment helped turn around the sell-off in riskier non-U.S. assets that followed Donald Trump’s unexpected victory in the U.S. presidential election in November. Your fund benefited as risk appetite recovered this year and performed in line with its benchmark.

The Institutional Emerging Markets Equity Fund returned 8.98% for the six months ended April 30, 2017, versus the 9.03% return of its benchmark, the MSCI Emerging Markets Index, and 8.63% for the Lipper Emerging Markets Funds Average.

Emerging markets stocks rallied over the reporting period as investors bid up prices on attractively valued companies amid improved earnings growth in many countries. Concerns about Donald Trump’s protectionist rhetoric and inflationary policies caused a sell-off in emerging markets at the start of the period as investors fled assets that would be negatively impacted by higher U.S. interest rates and a stronger U.S. dollar. But bullish sentiment returned as the dollar began to weaken in January and U.S. rates remained relatively stable. Local currency strength allowed emerging markets to endure bouts of volatility following rising trade tension between the U.S. and Mexico and political turmoil in Turkey, South Korea, and South Africa. After November’s post-election drop, the MSCI Emerging Markets Index rose for five straight months and ended our reporting period close to its highest level since June 2015.

The strong performance in emerging markets came even as the Federal Reserve raised short-term interest rates twice during the period as the central bank continued to unwind its years-long accommodative monetary policy.

Most emerging markets advanced in the past six months. South Korea and Taiwan ranked among the best performers as their export-driven economies benefited from a surge in trade this year. India and Russia also posted double-digit returns in dollar terms. Brazil’s market, one of the strongest in the world for most of the past 12 months, was down 1% for the six-month period.

Our investments in high-quality companies with strong growth potential, proven managements, strong franchises, and solid fundamentals paid off as economic conditions in many emerging markets countries improved and reforms progressed. Stock selection in Brazil, South Korea, China, and Taiwan drove performance over the period. On the other hand, India, South Africa, Russia, and Turkey hurt relative results. From a sector perspective, stock selection in information technology and financials contributed the most to returns. Our stock selection in information technology was a significant contributor, followed by financials.

Asia
Our Asian holdings represented about two-thirds of the portfolio. China is the largest country allocation, though it is also our largest underweight as we have little exposure to its manufacturing and banking sectors. Instead, we focus on companies that we expect to benefit from growth in domestic demand and disposable incomes, such as Internet, consumer products, clean energy, and insurance companies.

Tencent Holdings, China’s dominant online social media platform, was one of the fund’s top overall contributors to relative returns. The company continued to deliver very strong results and has solidified its market position through the popularity of its online games and WeChat instant messaging application. Sunny Optical Technology, which manufactures optical scientific instruments and lenses for smartphones and other uses, was another top contributor after it reported better-than-expected earnings and revenue growth. (Please refer to the portfolio of investments for a complete list of holdings and the amount each represents in the portfolio.)

We have some significant investments in India, particularly in some of the high-quality private banks. Indian mortgage company Housing Development Finance helped results. However, our position in Infosys, India’s leading IT company, detracted from returns amid worries that a change in U.S. immigration rules regarding H-1B visas would hurt the company. However, we remain confident in the management’s ability to deliver long-term growth. In November, India’s government implemented an unexpected demonetization measure in which it banned most of the currency in circulation and replaced it with new bills. Despite generating widespread criticism for causing a nationwide cash shortfall for weeks, the measure is expected to only temporarily dampen India’s economy, the world’s fastest-growing major emerging market.

We have long maintained underweight allocations in South Korea and Taiwan, two of Asia’s most developed markets. While they lack the demographic tailwinds and rapid economic growth rates of less mature emerging markets, they are home to some attractively valued technology suppliers that have done a good job of capturing and increasing global market share.

South Korea’s markets performed well, boosted by technology-related stocks. We were pleased to see that the market fared so well after the country’s constitutional court upheld the impeachment of President Park Geun-hye over corruption allegations. We maintained a large position in Samsung Electronics, one of the fund’s top contributors and our largest position at period-end. Samsung’s stock recovered during the period after weakness that followed the company’s scrapping of its Galaxy Note 7 smartphone after numerous reports of the devices catching fire. We increased our position at that time, believing the problem was temporary. That decision paid off.

In Taiwan, the technology sector features many highly innovative, cost-effective producers that deliver high-quality products. Besides generating steady earnings growth, many of these companies have shareholder-friendly policies and a willingness to pay high dividends. Our deep research platform and company insight paid off over the period with Catcher Technology, which makes metal casings for Apple’s iPhone and other mobile devices. The company was a significant contributor during the period. Because of our analyst’s strong conviction in this company, we added to our holdings last year even as it underperformed amid fears that Catcher’s profits would fall if the next generation of iPhones would use glass casings instead of metal casings. However, our research showed that the complex engineering required to support glass casings would allow Catcher to charge the same, if not higher, prices for its products.

Also in Taiwan, our position in Largan Precision was a top contributor. Shares in the company, an Apple supplier that makes precision handset camera lenses, rose, thanks to strong earnings. We believe that Largan should benefit from the increased adoption of dual-camera smartphones and multi-camera “augmented reality” phones, which should help the company’s margins and earnings growth.

Latin America
Brazil’s economy appears to be slowly emerging from its worst recession on record. After a strong rally last year, its market pulled back slightly during the six-month reporting period.

Our investment team traveled to Brazil and met with corporate leaders and policymakers to gain deeper insights into the country’s economic climate and business challenges. We expect that Brazil’s eventual recovery will be gradual as unemployment remains high and political risk related to the ongoing corruption investigation surrounding state oil company Petrobras continues.

Our holdings in a few Brazilian private banks, which have performed well as macroeconomic headwinds dissipate, helped returns. One of our highest-conviction names is Itau Unibanco, which has exposure to both retail and corporate lending. It was a top contributor to relative and absolute performance.

Beyond financials, we like the prospects for consumer companies. We have a large position in apparel retailer Lojas Renner, which has consistently gained market share. As consumption recovers in Brazil, we expect its earnings growth to accelerate. We trimmed our position after the stock’s strong performance but remain bullish on the company, which has emerged from Brazil’s recession with an increasingly dominant market position.

Mexico’s equity market rose during the period, despite concerns about possible new punitive tax and trade policies. Its market and the peso set record highs over the period, rallying from post-U.S. election lows. Our Mexico holdings are concentrated in our highest-conviction names that are best positioned for an environment of rising rates and foreign exchange volatility. Wal-Mart de Mexico, for example, was a top performer.

During the period, we increased our position in this company, which continued to gain market share and performed consistently across multiple formats and regions.

Argentina
Argentina’s stock market rallied more than 22% as rumors emerged that MSCI would reclassify the country as an emerging market instead of a frontier market. Argentina’s economic normalization is on the right track as President Mauricio Macri executes on his reform agenda that includes fiscal consolidation, abandoning protectionism, and improving competition. As a result, our out-of-benchmark positions in Argentina significantly contributed to relative performance. Our largest Argentine holding is MercadoLibre, the leading online marketplace in Latin America and one of the fund’s best performers.

Europe, Middle East, and Africa (EMEA)
Within emerging Europe, we hold three stocks in Russia, one in Poland, and two in Turkey. The fund benefited from our exposure to Russia’s dominant bank, Sberbank, which we believe is well positioned to take advantage of the country’s growing consumer market. Sberbank has gained market share in loans and deposits while maintaining a relatively strong capital position, and we regard it as one of the most attractively valued emerging market banks. Russian food retailer Magnit was a top detractor despite gaining market share at a time when Russia’s economy was slowing. During the period, it struggled to achieve the right product and promotional mix. However, we expect the management to correct the missteps and get the company back on track.

We remain neutral to the benchmark in the Middle East and Africa. While markets in the region face structural challenges, we have found attractive opportunities in consumer-focused sectors. In South Africa, we favor companies that have a strong competitive position and that will benefit from a better macro environment as the country emerges from a period of sluggish growth. FirstRand, South Africa’s second-largest bank, ranks among the fund’s top holdings. Our overweight in the stock boosted results.

In the United Arab Emirates (UAE), we focus on solid companies that will do well even if oil prices remain stable. Our out-of-benchmark position in First Bank of Abu Dhabi, which merged with another UAE bank, contributed to returns.

We expect emerging markets growth to outpace that of developed world markets in the near future. Overall, we are likely to see greater divergence in performance among countries and in stocks within individual countries. Countries that push forward with reforms should perform well, while countries that do not will struggle.

We will remain focused on quality companies that we believe will weather the tough environment and improve their competitive positioning. Even after the strong performance over the past six months, valuations are compelling and remain at a discount relative to their history and to their developed market peers.

The future is not without risk. A worse-than-expected slowdown in China, geopolitical tensions in North Korea, new trade restrictions, or an unexpected strengthening of the U.S. dollar could create problems for emerging markets. However, we believe that investor concerns may be overdone in many cases. While the extent of China’s growth slowdown remains an unknown, we think that policymakers have the tools to manage it. Similarly, we expect that President Trump will prove more pragmatic in negotiating trade agreements.

Going forward, we will continue to closely monitor Brazil’s ongoing corruption scandal. After the end of the reporting period, calls for President Michel Temer’s resignation grew after he was taped allegedly condoning bribery. While we believe needed pension reform legislation—so crucial to Brazil’s economic recovery—will ultimately pass, Temer’s resignation or impeachment could delay its passage.

We believe that higher U.S. interest rates will not affect emerging markets as much as some investors fear. Most emerging markets countries are better able to weather tighter U.S. policy than they were during prior periods of rate increases given their improved current account positions, ample foreign exchange reserves, higher real interest rates, and currencies that, in most cases, have fallen over the past several years.

We expect the investment environment to remain complex yet continue to provide good opportunities for our disciplined investment process and deep research resources and capabilities.

Gonzalo Pángaro
Portfolio manager and chairman of the fund’s Investment Advisory Committee

The committee chairman has day-to-day responsibility for managing the portfolio and executing the fund’s investment program.

Funds that invest overseas generally carry more risk than funds that invest strictly in U.S. assets. Funds investing in a single country or in a limited geographic region tend to be riskier than more diversified funds. Risks can result from varying stages of economic and political development; differing regulatory environments, trading days, and accounting standards; and higher transaction costs of non-U.S. markets. Non-U.S. investments are also subject to currency risk, or a decline in the value of a foreign currency versus the U.S. dollar, which reduces the dollar value of securities denominated in that currency.

Lipper averages: The averages of available mutual fund performance returns for specified time periods in categories defined by Lipper Inc.

MSCI Emerging Markets Index: A capitalization-weighted index of stocks from 26 emerging market countries that only includes securities that may be traded by foreign investors.

Note: MSCI makes no express or implied warranties or representations and shall have no liability whatsoever with respect to any MSCI data contained herein. The MSCI data may not be further redistributed or used as a basis for other indices or any securities or financial products. This report is not approved, reviewed, or produced by MSCI.

Performance and Expenses
T. Rowe Price Institutional Emerging Markets Equity Fund

This chart shows the value of a hypothetical $1 million investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The result is compared with benchmarks, which may include a broad-based market index and a peer group average or index. Market indexes do not include expenses, which are deducted from fund returns as well as mutual fund averages and indexes.

As a mutual fund shareholder, you may incur two types of costs: (1) transaction costs, such as redemption fees or sales loads, and (2) ongoing costs, including management fees, distribution and service (12b-1) fees, and other fund expenses. The following example is intended to help you understand your ongoing costs (in dollars) of investing in the fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 invested at the beginning of the most recent six-month period and held for the entire period.

Actual Expenses
The first line of the following table (Actual) provides information about actual account values and actual expenses. You may use the information on this line, together with your account balance, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number on the first line under the heading “Expenses Paid During Period” to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes
The information on the second line of the table (Hypothetical) is based on hypothetical account values and expenses derived from the fund’s actual expense ratio and an assumed 5% per year rate of return before expenses (not the fund’s actual return). You may compare the ongoing costs of investing in the fund with other funds by contrasting this 5% hypothetical example and the 5% hypothetical examples that appear in the shareholder reports of the other funds. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period.

You should also be aware that the expenses shown in the table highlight only your ongoing costs and do not reflect any transaction costs, such as redemption fees or sales loads. Therefore, the second line of the table is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. To the extent a fund charges transaction costs, however, the total cost of owning that fund is higher.

Financial Highlights
T. Rowe Price Institutional Emerging Markets Equity Fund
(Unaudited)

Portfolio of Investments^‡T. Rowe Price Institutional Emerging Markets Equity Fund
April 30, 2017 (Unaudited)

Statement of Assets and Liabilities
T. Rowe Price Institutional Emerging Markets Equity Fund
April 30, 2017 (Unaudited)
($000s, except shares and per share amounts)

Statement of Operations
T. Rowe Price Institutional Emerging Markets Equity Fund
(Unaudited)
($000s)

Statement of Changes in Net Assets
T. Rowe Price Institutional Emerging Markets Equity Fund
(Unaudited)
($000s)

Notes to Financial Statements
T. Rowe Price Institutional Emerging Markets Equity Fund
April 30, 2017 (Unaudited)

T. Rowe Price Institutional International Funds, Inc. (the corporation), is registered under the Investment Company Act of 1940 (the 1940 Act). The Institutional Emerging Markets Equity Fund (the fund) is a diversified, open-end management investment company established by the corporation. The fund seeks long-term growth of capital through investments primarily in the common stocks of companies located (or with primary operations) in emerging markets.

Basis of Preparation The fund is an investment company and follows accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 (ASC 946). The accompanying financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (GAAP), including, but not limited to, ASC 946. GAAP requires the use of estimates made by management. Management believes that estimates and valuations are appropriate; however, actual results may differ from those estimates, and the valuations reflected in the accompanying financial statements may differ from the value ultimately realized upon sale or maturity.

Investment Transactions, Investment Income, and Distributions Income and expenses are recorded on the accrual basis. Dividends received from mutual fund investments are reflected as dividend income; capital gain distributions are reflected as realized gain/loss. Dividend income and capital gain distributions are recorded on the ex-dividend date. Income tax-related interest and penalties, if incurred, would be recorded as income tax expense. Investment transactions are accounted for on the trade date. Realized gains and losses are reported on the identified cost basis. Income distributions are declared and paid annually. Distributions to shareholders are recorded on the ex-dividend date. Capital gain distributions are generally declared and paid by the fund annually.

Currency Translation Assets, including investments, and liabilities denominated in foreign currencies are translated into U.S. dollar values each day at the prevailing exchange rate, using the mean of the bid and asked prices of such currencies against U.S. dollars as quoted by a major bank. Purchases and sales of securities, income, and expenses are translated into U.S. dollars at the prevailing exchange rate on the date of the transaction. The effect of changes in foreign currency exchange rates on realized and unrealized security gains and losses is reflected as a component of security gains and losses.

Redemption Fees A 2% fee is assessed on redemptions of fund shares held for 90 days or less to deter short-term trading and to protect the interests of long-term shareholders. Redemption fees are withheld from proceeds that shareholders receive from the sale or exchange of fund shares. The fees are paid to the fund and are recorded as an increase to paid-in capital. The fees may cause the redemption price per share to differ from the net asset value per share.

New Accounting Guidance In October 2016, the Securities and Exchange Commission (SEC) issued a new rule, Investment Company Reporting Modernization, which, among other provisions, amends Regulation S-X to require standardized, enhanced disclosures, particularly related to derivatives, in investment company financial statements. Compliance with the guidance is effective for financial statements filed with the SEC on or after August 1, 2017; adoption will have no effect on the fund’s net assets or results of operations.

The fund’s financial instruments are valued and its net asset value (NAV) per share is computed at the close of the New York Stock Exchange (NYSE), normally 4 p.m. ET, each day the NYSE is open for business. However, the NAV per share may be calculated at a time other than the normal close of the NYSE if trading on the NYSE is restricted, if the NYSE closes earlier, or as may be permitted by the SEC.

Fair Value The fund’s financial instruments are reported at fair value, which GAAP defines as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The T. Rowe Price Valuation Committee (the Valuation Committee) is an internal committee that has been delegated certain responsibilities by the fund’s Board of Directors (the Board) to ensure that financial instruments are appropriately priced at fair value in accordance with GAAP and the 1940 Act. Subject to oversight by the Board, the Valuation Committee develops and oversees pricing-related policies and procedures and approves all fair value determinations. Specifically, the Valuation Committee establishes procedures to value securities; determines pricing techniques, sources, and persons eligible to effect fair value pricing actions; oversees the selection, services, and performance of pricing vendors; oversees valuation-related business continuity practices; and provides guidance on internal controls and valuation-related matters. The Valuation Committee reports to the Board and has representation from legal, portfolio management and trading, operations, risk management, and the fund’s treasurer.

Various valuation techniques and inputs are used to determine the fair value of financial instruments. GAAP establishes the following fair value hierarchy that categorizes the inputs used to measure fair value:

Level 1 – quoted prices (unadjusted) in active markets for identical financial instruments that the fund can access at the reporting date

Level 2 – inputs other than Level 1 quoted prices that are observable, either directly or indirectly (including, but not limited to, quoted prices for similar financial instruments in active markets, quoted prices for identical or similar financial instruments in inactive markets, interest rates and yield curves, implied volatilities, and credit spreads)

Observable inputs are developed using market data, such as publicly available information about actual events or transactions, and reflect the assumptions that market participants would use to price the financial instrument. Unobservable inputs are those for which market data are not available and are developed using the best information available about the assumptions that market participants would use to price the financial instrument. GAAP requires valuation techniques to maximize the use of relevant observable inputs and minimize the use of unobservable inputs. When multiple inputs are used to derive fair value, the financial instrument is assigned to the level within the fair value hierarchy based on the lowest-level input that is significant to the fair value of the financial instrument. Input levels are not necessarily an indication of the risk or liquidity associated with financial instruments at that level but rather the degree of judgment used in determining those values.

Valuation Techniques Equity securities listed or regularly traded on a securities exchange or in the over-the-counter (OTC) market are valued at the last quoted sale price or, for certain markets, the official closing price at the time the valuations are made. OTC Bulletin Board securities are valued at the mean of the closing bid and asked prices. A security that is listed or traded on more than one exchange is valued at the quotation on the exchange determined to be the primary market for such security. Listed securities not traded on a particular day are valued at the mean of the closing bid and asked prices for domestic securities and the last quoted sale or closing price for international securities.

For valuation purposes, the last quoted prices of non-U.S. equity securities may be adjusted to reflect the fair value of such securities at the close of the NYSE. If the fund determines that developments between the close of a foreign market and the close of the NYSE will affect the value of some or all of its portfolio securities, the fund will adjust the previous quoted prices to reflect what it believes to be the fair value of the securities as of the close of the NYSE. In deciding whether it is necessary to adjust quoted prices to reflect fair value, the fund reviews a variety of factors, including developments in foreign markets, the performance of U.S. securities markets, and the performance of instruments trading in U.S. markets that represent foreign securities and baskets of foreign securities. The fund may also fair value securities in other situations, such as when a particular foreign market is closed but the fund is open. The fund uses outside pricing services to provide it with quoted prices and information to evaluate or adjust those prices. The fund cannot predict how often it will use quoted prices and how often it will determine it necessary to adjust those prices to reflect fair value. As a means of evaluating its security valuation process, the fund routinely compares quoted prices, the next day’s opening prices in the same markets, and adjusted prices.

Actively traded equity securities listed on a domestic exchange generally are categorized in Level 1 of the fair value hierarchy. Non-U.S. equity securities generally are categorized in Level 2 of the fair value hierarchy despite the availability of quoted prices because, as described above, the fund evaluates and determines whether those quoted prices reflect fair value at the close of the NYSE or require adjustment. OTC Bulletin Board securities, certain preferred securities, and equity securities traded in inactive markets generally are categorized in Level 2 of the fair value hierarchy.

Investments in mutual funds are valued at the mutual fund’s closing NAV per share on the day of valuation and are categorized in Level 1 of the fair value hierarchy. Assets and liabilities other than financial instruments, including short-term receivables and payables, are carried at cost, or estimated realizable value, if less, which approximates fair value.

Thinly traded financial instruments and those for which the above valuation procedures are inappropriate or are deemed not to reflect fair value are stated at fair value as determined in good faith by the Valuation Committee. The objective of any fair value pricing determination is to arrive at a price that could reasonably be expected from a current sale. Financial instruments fair valued by the Valuation Committee are primarily private placements, restricted securities, warrants, rights, and other securities that are not publicly traded.

Subject to oversight by the Board, the Valuation Committee regularly makes good faith judgments to establish and adjust the fair valuations of certain securities as events occur and circumstances warrant. For instance, in determining the fair value of an equity investment with limited market activity, such as a private placement or a thinly traded public company stock, the Valuation Committee considers a variety of factors, which may include, but are not limited to, the issuer’s business prospects, its financial standing and performance, recent investment transactions in the issuer, new rounds of financing, negotiated transactions of significant size between other investors in the company, relevant market valuations of peer companies, strategic events affecting the company, market liquidity for the issuer, and general economic conditions and events. In consultation with the investment and pricing teams, the Valuation Committee will determine an appropriate valuation technique based on available information, which may include both observable and unobservable inputs. The Valuation Committee typically will afford greatest weight to actual prices in arm’s length transactions, to the extent they represent orderly transactions between market participants, transaction information can be reliably obtained, and prices are deemed representative of fair value. However, the Valuation Committee may also consider other valuation methods such as market-based valuation multiples; a discount or premium from market value of a similar, freely traded security of the same issuer; or some combination. Fair value determinations are reviewed on a regular basis and updated as information becomes available, including actual purchase and sale transactions of the issue. Because any fair value determination involves a significant amount of judgment, there is a degree of subjectivity inherent in such pricing decisions, and fair value prices determined by the Valuation Committee could differ from those of other market participants. Depending on the relative significance of unobservable inputs, including the valuation technique(s) used, fair valued securities may be categorized in Level 2 or 3 of the fair value hierarchy.

Valuation Inputs The following table summarizes the fund’s financial instruments, based on the inputs used to determine their fair values on April 30, 2017:

There were no material transfers between Levels 1 and 2 during the six months ended April 30, 2017.

Consistent with its investment objective, the fund engages in the following practices to manage exposure to certain risks and/or to enhance performance. The investment objective, policies, program, and risk factors of the fund are described more fully in the fund’s prospectus and Statement of Additional Information.

Emerging and Frontier Markets The fund may invest, either directly or through investments in T. Rowe Price institutional funds, in securities of companies located in, issued by governments of, or denominated in or linked to the currencies of emerging and frontier market countries; at period-end, approximately 92% of the fund’s net assets were invested in emerging markets and 1% in frontier markets. Emerging markets, and to a greater extent frontier markets, generally have economic structures that are less diverse and mature, and political systems that are less stable, than developed countries. These markets may be subject to greater political, economic, and social uncertainty and differing regulatory environments that may potentially impact the fund’s ability to buy or sell certain securities or repatriate proceeds to U.S. dollars. Such securities are often subject to greater price volatility, less liquidity, and higher rates of inflation than U.S. securities. Investing in frontier markets is significantly riskier than investing in other countries, including emerging markets.

China A shares The fund invests in certain Chinese equity securities (A shares) that have limited availability to investors outside of China. The fund gains access to the A share market through the Shanghai-Hong Kong Stock Connect program (Shanghai Stock Connect), through the Shenzhen-Hong Kong Stock Connect program (Shenzhen Stock Connect) or through a wholly owned subsidiary of Price Associates, which serves as the registered Qualified Foreign Institutional Investor (QFII) for all participating T. Rowe Price-sponsored products (each a participating account). Related to A shares held through the QFII, investment decisions are specific to each participating account, and each account bears the economic consequences of its holdings and transactions in A shares. Further, the fund’s ability to repatriate cash associated with its A shares held through the QFII is subject to certain restrictions and administrative processes involving the Chinese government; consequently, the fund may experience substantial delays in gaining access to its assets or incur a loss of value in the event of noncompliance with governmental requirements. A shares acquired through the QFII are valued using the onshore renminbi exchange rate (CNY), and those acquired through the Shanghai Stock Connect and Shenzhen Stock Connect are valued using the offshore renminbi exchange rate (CNH). CNY and CNH exchange rates may differ; accordingly, A shares of the same issue purchased through different channels may not have the same U.S. dollar value. Generally, the fund is not subject to capital gain tax related to its A share investments.

Other Purchases and sales of portfolio securities other than short-term securities aggregated $243,170,000 and $83,400,000, respectively, for the six months ended April 30, 2017.

No provision for federal income taxes is required since the fund intends to continue to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code and distribute to shareholders all of its taxable income and gains. Distributions determined in accordance with federal income tax regulations may differ in amount or character from net investment income and realized gains for financial reporting purposes. Financial reporting records are adjusted for permanent book/tax differences to reflect tax character but are not adjusted for temporary differences. The amount and character of tax-basis distributions and composition of net assets are finalized at fiscal year-end; accordingly, tax-basis balances have not been determined as of the date of this report.

The fund intends to retain realized gains to the extent of available capital loss carryforwards. Because the fund is required to use capital loss carryforwards that do not expire before those with expiration dates, all or a portion of its capital loss carryforwards subject to expiration could ultimately go unused. As of October 31, 2016, the fund had $108,532,000 of available capital loss carryforwards, which expire as follows: $103,822,000, in fiscal 2017, $2,829,000 in fiscal 2018, and $1,881,000 in fiscal 2019.

At April 30, 2017, the cost of investments for federal income tax purposes was $1,042,712,000. Net unrealized gain aggregated $210,807,000 at period-end, of which $259,014,000 related to appreciated investments and $48,207,000 related to depreciated investments.

The fund is subject to foreign income taxes imposed by certain countries in which it invests. Additionally, certain foreign currency transactions are subject to tax, and capital gains realized upon disposition of securities issued in or by certain foreign countries are subject to capital gains tax imposed by those countries. All taxes are computed in accordance with the applicable foreign tax law, and, to the extent permitted, capital losses are used to offset capital gains. Taxes attributable to income are accrued by the fund as a reduction of income. Taxes incurred on the purchase of foreign currencies are recorded as realized loss on foreign currency transactions. Current and deferred tax expense attributable to capital gains is reflected as a component of realized or change in unrealized gain/loss on securities in the accompanying financial statements. At April 30, 2017, the fund had no deferred tax liability attributable to foreign securities and $2,690,000 of foreign capital loss carryforwards, including $816,000 that expire in 2020, $631,000 that expire in 2022, and $1,243,000 that expire in 2024.

The fund is managed by T. Rowe Price Associates, Inc. (Price Associates), a wholly owned subsidiary of T. Rowe Price Group, Inc. (Price Group). Price Associates has entered into a sub-advisory agreement(s) with one or more of its wholly owned subsidiaries, to provide investment advisory services to the fund. The investment management and administrative agreement between the fund and Price Associates provides for an all-inclusive annual fee equal to 1.10% of the fund’s average daily net assets. The fee is computed daily and paid monthly. The all-inclusive fee covers investment management, shareholder servicing, transfer agency, accounting, and custody services provided to the fund, as well as fund directors’ fees and expenses. Interest, taxes, brokerage commissions, and other non-recurring expenses permitted by the investment management agreement are paid directly by the fund.

Mutual funds, trusts, and other accounts managed by Price Associates or its affiliates (collectively, Price funds and accounts) may invest in the fund. No Price fund or account may invest for the purpose of exercising management or control over the fund. At April 30,2017, approximately 15% of the fund’s outstanding shares were held by Price funds and accounts.

The fund may invest in the T. Rowe Price Government Reserve Fund, the T. Rowe Price Treasury Reserve Fund, or the T. Rowe Price Short-Term Fund (collectively, the Price Reserve Funds), open-end management investment companies managed by Price Associates and considered affiliates of the fund. The Price Reserve Funds are offered as short-term investment options to mutual funds, trusts, and other accounts managed by Price Associates or its affiliates and are not available for direct purchase by members of the public. The Price Reserve Funds pay no investment management fees.

The fund may participate in securities purchase and sale transactions with other funds or accounts advised by Price Associates (cross trades), in accordance with procedures adopted by the fund’s Board and Securities and Exchange Commission rules, which require, among other things, that such purchase and sale cross trades be effected at the independent current market price of the security. During the six months ended April 30, 2017, the fund had no purchases or sales cross trades with other funds or accounts advised by Price Associates.

A description of the policies and procedures used by T. Rowe Price funds and portfolios to determine how to vote proxies relating to portfolio securities is available in each fund’s Statement of Additional Information. You may request this document by calling 1-800-225-5132 or by accessing the SEC’s website, sec.gov.

The description of our proxy voting policies and procedures is also available on our corporate website. To access it, please visit the following Web page:

Scroll down to the section near the bottom of the page that says, “Proxy Voting Policies.” Click on the Proxy Voting Policies link in the shaded box.

Each fund’s most recent annual proxy voting record is available on our website and through the SEC’s website. To access it through T. Rowe Price, visit the website location shown above, and scroll down to the section near the bottom of the page that says, “Proxy Voting Records.” Click on the Proxy Voting Records link in the shaded box.

The fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission for the first and third quarters of each fiscal year on Form N-Q. The fund’s Form N-Q is available electronically on the SEC’s website (sec.gov); hard copies may be reviewed and copied at the SEC’s Public Reference Room, 100 F St. N.E., Washington, DC 20549. For more information on the Public Reference Room, call 1-800-SEC-0330.

Each year, the fund’s Board of Directors (Board) considers the continuation of the investment management agreement (Advisory Contract) between the fund and its investment advisor, T. Rowe Price Associates, Inc. (Advisor), as well as the continuation of the investment subadvisory agreement (Subadvisory Contract) that the Advisor has entered into with T. Rowe Price International Ltd (Subadvisor) on behalf of the fund. In that regard, at an in-person meeting held on March 6–7, 2017 (Meeting), the Board, including a majority of the fund’s independent directors, approved the continuation of the fund’s Advisory Contract and Subadvisory Contract. At the Meeting, the Board considered the factors and reached the conclusions described below relating to the selection of the Advisor and Subadvisor and the approval of the Advisory Contract and Subadvisory Contract. The independent directors were assisted in their evaluation of the Advisory Contract and Subadvisory Contract by independent legal counsel from whom they received separate legal advice and with whom they met separately.

In providing information to the Board, the Advisor was guided by a detailed set of requests for information submitted by independent legal counsel on behalf of the independent directors. In considering and approving the Advisory Contract and Subadvisory Contract, the Board considered the information it believed was relevant, including, but not limited to, the information discussed below. The Board considered not only the specific information presented in connection with the Meeting but also the knowledge gained over time through interaction with the Advisor and Subadvisor about various topics. The Board meets regularly and, at each of its meetings, covers an extensive agenda of topics and materials and considers factors that are relevant to its annual consideration of the renewal of the T. Rowe Price funds’ advisory contracts, including performance and the services and support provided to the funds and their shareholders.

Services Provided by the Advisor and Subadvisor
The Board considered the nature, quality, and extent of the services provided to the fund by the Advisor and Subadvisor. These services included, but were not limited to, directing the fund’s investments in accordance with its investment program and the overall management of the fund’s portfolio, as well as a variety of related activities such as financial, investment operations, and administrative services; compliance; maintaining the fund’s records and registrations; and shareholder communications. The Board also reviewed the background and experience of the Advisor’s and Subadvisor’s senior management teams and investment personnel involved in the management of the fund, as well as the Advisor’s compliance record. The Board concluded that it was satisfied with the nature, quality, and extent of the services provided by the Advisor and Subadvisor.

Investment Performance of the Fund
The Board took into account discussions with the Advisor and reports that it receives throughout the year relating to fund performance. In connection with the Meeting, the Board reviewed the fund’s net annualized total returns for the 1-, 2-, 3-, 4-, 5-, and 10-year periods as of September 30, 2016, and compared these returns with the performance of a peer group of funds with similar investment programs and a wide variety of other previously agreed-upon comparable performance measures and market data, including those supplied by Broadridge, which is an independent provider of mutual fund data.

On the basis of this evaluation and the Board’s ongoing review of investment results, and factoring in the relative market conditions during certain of the performance periods, the Board concluded that the fund’s performance was satisfactory.

Costs, Benefits, Profits, and Economies of Scale
The Board reviewed detailed information regarding the revenues received by the Advisor under the Advisory Contract and other benefits that the Advisor (and its affiliates, including the Subadvisor) may have realized from its relationship with the fund, including any research received under “soft dollar” agreements and commission-sharing arrangements with broker-dealers. The Board considered that the Advisor and Subadvisor may receive some benefit from soft-dollar arrangements pursuant to which research is received from broker-dealers that execute the fund’s portfolio transactions. The Board received information on the estimated costs incurred and profits realized by the Advisor from managing the T. Rowe Price funds. The Board also reviewed estimates of the profits realized from managing the fund in particular, and the Board concluded that the Advisor’s profits were reasonable in light of the services provided to the fund.

The Board also considered whether the fund benefits under the fee levels set forth in the Advisory Contract from any economies of scale realized by the Advisor. Under the Advisory Contract, the fund pays the Advisor a single fee, or all-inclusive management fee, which is based on the fund’s average daily net assets. The all-inclusive management fee includes investment management services and provides for the Advisor to pay all of the fund’s ordinary, recurring operating expenses except for interest, taxes, portfolio transaction fees, and any nonrecurring extraordinary expenses that may arise. Under the Subadvisory Contract, the Advisor may pay the Subadvisor up to 60% of the advisory fee that the Advisor receives from the fund. The Board concluded that, based on the profitability data it reviewed and consistent with this all-inclusive management fee structure, the Advisory Contract provided for a reasonable sharing of any benefits from economies of scale with the fund.

Fees and Expenses
The Board was provided with information regarding industry trends in management fees and expenses. Among other things, the Board reviewed data for peer groups that were compiled by Broadridge, which compared: (i) contractual management fees, total expenses, actual management fees, and non-management expenses of the fund to a group of competitor funds selected by Broadridge (Expense Group) and (ii) total expenses, actual management fees, and non-management expenses of the fund to a broader set of funds within the Lipper investment classification (Expense Universe). The Board considered the fund’s contractual management fee rate, actual management fee rate (which reflects the management fees actually received from the fund by the Advisor after paying the fund’s operating expenses, as well as any applicable waivers, reductions, or reimbursements), operating expenses, and total expenses (which reflects the net total expense ratio of the fund after any waivers, reductions, or reimbursements) in comparison with the information for the Broadridge peer groups. Broadridge generally constructed the peer groups by seeking the most comparable funds based on similar investment classifications and objectives, expense structure, asset size, and operating components and attributes and ranked funds into quintiles, with the first quintile representing the funds with the lowest relative expenses and the fifth quintile representing the funds with the highest relative expenses. The information provided to the Board indicated that the fund’s contractual management fee ranked in the third quintile (Expense Group), the fund’s actual management fee rate ranked in the fourth quintile (Expense Group and Expense Universe), and the fund’s total expenses ranked in the second quintile (Expense Group and Expense Universe).

The Board also reviewed the fee schedules for institutional accounts and private accounts with similar mandates that are advised or subadvised by the Advisor and its affiliates. Management provided the Board with information about the Advisor’s responsibilities and services provided to subadvisory and other institutional account clients, including information about how the requirements and economics of the institutional business are fundamentally different from those of the mutual fund business. The Board considered information showing that the Advisor’s mutual fund business is generally more complex from a business and compliance perspective than its institutional account business and considered various relevant factors, such as the broader scope of operations and oversight, more extensive shareholder communication infrastructure, greater asset flows, heightened business risks, and differences in applicable laws and regulations associated with the Advisor’s proprietary mutual fund business. In assessing the reasonableness of the fund’s management fee rate, the Board considered the differences in the nature of the services required for the Advisor to manage its mutual fund business versus managing a discrete pool of assets as a subadvisor to another institution’s mutual fund or for an institutional account, and that the Advisor generally performs significant additional services and assumes greater risk in managing the fund and other T. Rowe Price funds than it does for institutional account clients.

On the basis of the information provided and the factors considered, the Board concluded that the fees paid by the fund under the Advisory Contract are reasonable.

Approval of the Advisory Contract and Subadvisory Contract
As noted, the Board approved the continuation of the Advisory Contract and Subadvisory Contract. No single factor was considered in isolation or to be determinative to the decision. Rather, the Board concluded, in light of a weighting and balancing of all factors considered, that it was in the best interests of the fund and its shareholders for the Board to approve the continuation of the Advisory Contract and Subadvisory Contract (including the fees to be charged for services thereunder).

A code of ethics, as defined in Item 2 of Form N-CSR, applicable to its principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions is filed as an exhibit to the registrant’s annual Form N-CSR. No substantive amendments were approved or waivers were granted to this code of ethics during the registrant’s most recent fiscal half-year.

(a) Not applicable. The complete schedule of investments is included in Item 1 of this Form N-CSR.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

(a) The registrant’s principal executive officer and principal financial officer have evaluated the registrant’s disclosure controls and procedures within 90 days of this filing and have concluded that the registrant’s disclosure controls and procedures were effective, as of that date, in ensuring that information required to be disclosed by the registrant in this Form N-CSR was recorded, processed, summarized, and reported timely.

(b) The registrant’s principal executive officer and principal financial officer are aware of no change in the registrant’s internal control over financial reporting that occurred during the registrant’s second fiscal quarter covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

(a)(1) The registrant’s code of ethics pursuant to Item 2 of Form N-CSR is filed with the registrant’s annual Form N-CSR.

(2) Separate certifications by the registrant's principal executive officer and principal financial officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 and required by Rule 30a-2(a) under the Investment Company Act of 1940, are attached.

(3) Written solicitation to repurchase securities issued by closed-end companies: not applicable.

(b) A certification by the registrant's principal executive officer and principal financial officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and required by Rule 30a-2(b) under the Investment Company Act of 1940, is attached.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

T. Rowe Price Institutional International Funds, Inc.

	By	/s/ Edward C. Bernard
		Edward C. Bernard
		Principal Executive Officer

Date June 15, 2017

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

	By	/s/ Edward C. Bernard
		Edward C. Bernard
		Principal Executive Officer

Date June 15, 2017


	By	/s/ Catherine D. Mathews
		Catherine D. Mathews
		Principal Financial Officer

Date June 15, 2017

●	Emerging markets stocks rose during the six-month period ended April 30, 2017.
●	The Institutional Emerging Markets Equity Fund gained 8.98% in the reporting period, in line with its benchmark and slightly outperforming its Lipper peer group.
●	Stock selection in Brazil, South Korea, China, and Taiwan contributed most to relative performance. India detracted the most from relative returns.
●	Stock selection and our overweight position in information technology boosted relative results, while our overweight to the consumer staples sector and underweight to materials detracted.