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, 2016

The views and opinions in this report were current as of April 30, 2016. 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 ended the first half of our fiscal year virtually unchanged. The flat return was indicative of the considerable volatility as risk sentiment swung sharply. China-focused worries prevailed early on as investors fixated on the country’s weakening currency, rising capital outflows, and volatile stock market. However, sentiment reversed course at the end of January as China stepped up efforts to support its economy, global oil prices stabilized, and the U.S. Federal Reserve signaled it was in no hurry to raise interest rates. In Latin America, Brazil rallied significantly following a breathtaking sell-off. In this volatile environment, the Institutional Emerging Markets Equity Fund posted a modest gain, outperforming its benchmark and peer group average.

The Institutional Emerging Markets Equity Fund returned 2.01% for the six months ended April 30, 2016, outperforming the -0.01% return of its benchmark, the MSCI Emerging Markets Index, and exceeding its Lipper peer group average return of -0.20%. On a relative basis, the fund benefited from stock selection in China and Brazil. In China, our investments in some of the leading Internet companies helped performance, as these companies continued to increase their user base and broaden their services. Internet sales in China now exceed those in the U.S. Our underweight to Chinese banks also contributed. Within Brazil, our focus on high-quality companies with seasoned management teams, strong growth prospects, and solid competitive positions benefited the fund, as those stocks performed well during Brazil’s rally toward the end of the period.

India’s market, which has been a strong performer over the past few years, declined as earnings and economic growth disappointed somewhat. The Royal Bank of India has been very proactive in ensuring that banks adequately recognize and reserve for nonperforming loans. While oversight will ensure that the Indian banking system is in better shape, it cast a near-term cloud over those companies’ shares. Several of our positions in the financials sector added to returns. On the other hand, stock selection in Russia and India detracted from relative results. The fund’s underweight exposure to the energy and materials sectors detracted, as commodity prices rallied after a prolonged period of price declines.

Investor sentiment swung from extreme pessimism to optimism during the period. Concerns about the global impact of China’s slowdown, a steep downturn in oil and other commodities, and the Fed’s first interest rate hike in nine years last December weighed heavily on emerging markets assets in the beginning of the period. However, as sentiment improved, a recovery in raw materials prices lifted the outlook for commodity exporters, including Russia and Brazil. Risk sentiment also got a boost after the Fed took on a more dovish stance toward further rate increases this year, and central banks in Europe and Japan maintained accommodative policies. Expectations of fewer U.S. rate hikes pared the dollar’s recent advances and helped some emerging markets currencies to recover.

Returns varied widely across the emerging universe. In U.S. dollar terms, Chinese shares sank more than 9% as investors worried about the government’s ability to manage a slowing economy and stem a rising tide of capital outflows. On the other hand, Brazilian shares climbed more than 30% on expectations for a new government as momentum built toward President Dilma Rousseff’s impeachment. Emerging European stocks advanced, lifted by double-digit gains in Turkey and Russia, whose stock market rose as the outlook for their economies improved, if only modestly.

Asia
Asian holdings, which represent about two-thirds of the portfolio, generated mixed performance during the period. Although Chinese markets fell, stock selection contributed to the fund’s performance. Our investments are focused in industries and companies that we believe should continue to grow even as the overall economy slows. Tencent Holdings, the dominant online social media and gaming company, is an example of a dynamic growth company with the growth characteristics we prize. It continues to increase its user base and advertising revenues. We also hold a large position in Baidu, the leading online search engine operator. Other areas of investment include high-quality consumer companies, clean energy firms, and insurance companies. We have little exposure to the industrial segments, which, we believe, face years of slowing growth. In particular, we are underweight to Chinese banks, which we think will continue to struggle with mounting levels of nonperforming loans. Avoiding these names has helped the fund’s relative performance. (Please refer to the portfolio of investments for a complete list of holdings and the amount each represents in the portfolio.)

India is our second-largest country allocation. We have significant positions in the financials and information technology sectors. India’s economic fundamentals have improved greatly in recent years thanks to low oil prices, which have curbed inflation and allowed the central bank to cut interest rates. Although some investors are disappointed with the slow pace of reform following the landmark 2014 election of Prime Minister Narendra Modi, we are optimistic about India’s long-term outlook and think the country is heading in the right direction after several years of below-potential growth. Our position in mortgage lender Housing Development Finance detracted from results, as did our position in ICICI Bank, the fourth-largest bank in India. We took advantage of attractive valuations and added several regional Indian banks, including Yes Bank, which contributed to results.

We remain underweight to South Korea, primarily due to the scarcity of attractively priced growth opportunities. However, we own large positions in several global industry leaders, including Taiwan Semiconductor Manufacturing. Taiwan Semiconductor was a top contributor after the company announced dividend increases and raised its earnings guidance.

Latin America
Brazil helped performance thanks to stock selection and an overweight position to the country, whose stock market rallied this year as investors anticipated a new government. Brazilian companies were among many of the fund’s top absolute contributors. As we have written in past letters, Brazil has many good companies with solid management teams that have executed well in a tough environment. We expect our holdings will continue to be resilient performers amid the difficulties that will likely continue for several more months.

Despite the recent political turmoil, longer term, Brazil remains a promising place to invest because of its strong corporate governance and the sheer size of its stock market, which is much larger and more liquid than any other market in Latin America. Moreover, the growth of the country’s middle class and other demographic factors bode well over the medium to long term for consumption-driven areas of the economy. We remain positive about opportunities in Brazil, especially as needed reforms begin to get implemented.

Financial and consumer-driven stocks represented the bulk of our investments in the country, and in recent months, we opportunistically increased our exposure to companies in those sectors. Brazil has a somewhat consolidated and, on average, well-capitalized banking system, although public banks still represent over half of the industry. One of Brazil’s largest financial institutions, Itau Unibanco, benefited from improving investor sentiment. After building our position on weakness in 2015, we were rewarded for our conviction as Itau was the best overall contributor to absolute and relative returns. Our holdings in one of the leading shopping mall operators, BR Malls Participacoes, helped as that stock rallied strongly. We added Banco Bradesco to the portfolio over the period. Bradesco is a financial services conglomerate that offers banking and credit card services and is the country’s leading insurer. We expect that private banks will gain market share over the coming years as public banks exit the crisis with significant asset-quality problems. Given that the international bond market is effectively closed to Brazilian companies, Bradesco should also be able to capture some credit demand from high-quality Brazilian corporations.

Discount retailer Wal-Mart de Mexico, our largest holding in Mexico, detracted from results. However, we believe healthy same-store sales, e-commerce, and a superior value proposition will help the company grow over the medium term. Gold producer Fresnillo, an out-of-benchmark position, was a top contributor to returns as the price of gold and other commodities surged.

We hold modest positions in Colombia, Chile, and Peru, all of which contributed to relative returns. Our positions in these markets include Colombian banking group Grupo Aval Acciones y Valores and Chilean department store retailer SACI Falabella. We eliminated our position in Southern Copper, a low-cost copper producer whose mines are located in Peru and Mexico, taking advantage of the strong rally in its shares and the commodity.

Europe, Middle East, and Africa (EMEA)
The fund benefited from our substantial position in Sberbank, Russia’s dominant bank. Sberbank is an example of an investment theme we expect to play out in the future—the strong getting stronger. Sberbank, which is owned by the Central Bank of Russia, has a professional management team and healthy balance sheet. On the other hand, our investment in food retailer Magnit weighed on results. While it has contributed to the fund’s results over the long term, Magnit has struggled to find the proper merchandizing and pricing mixes in the current competitive environment. We believe that the management team will be successful in getting the company back on track.

We maintained a slight overweight to Turkey and South Africa. In Turkey, our largest position is food retailer BIM Birlesik Magazalar, whose management team has a strong track record. We eliminated Turkiye Halk Bankasi as part of our effort to consolidate the portfolio into fewer holdings with the best long-term growth prospects.

In South Africa, we favor well-run companies offering exposure to the faster-growing sub-Saharan African markets. Our largest holdings are department store operator Woolworths Holdings and Shoprite Holdings, the continent’s biggest food retailer, both of which are poised to benefit from a growing middle class and the move to more formalized shopping across Africa.

Emerging markets face many serious long-term challenges despite investors’ newfound optimism in recent months. As China continues to work through its capacity and debt overhang, its economic growth will continue to slow. Russia remains mired in recession and there appear to be no efforts to diversify beyond its heavy dependence on energy sales, which represent nearly 50% of tax revenues. Our belief is that lower oil prices will likely persist for some time and continue to put pressure on Russia and other oil-dependent economies.

However, while emerging markets have slowed over recent years, their growth should continue to outpace the developed world, particularly in countries that are pushing through difficult reforms. We believe that rising demand driven by a growing middle class remains a powerful secular force that will spur strong growth for many years, particularly among well-positioned companies and industries exposed to domestic consumption. We are encouraged to see that reform urgency has picked up in several countries, including Brazil and India. Rising U.S. interest rates have reduced the appetite for emerging markets assets since the 2013 “taper tantrum,” yet we believe that the actual impact of the Fed’s rate hikes will prove to be less significant than feared. Moreover, if the Fed raises rates because the U.S. economy is doing well, that would bode well for the global economy, including emerging markets. Finally, as emerging markets stocks underperformed U.S. stocks for the fifth straight year in 2015, valuations for many stocks are appealing.

We anticipate that returns across the emerging markets universe will be increasingly uneven, marked by lower correlations and greater divergence. In short, we believe this is a stock picker’s market and will continue to employ our global research platform to identify and select the most promising opportunities.

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.

Price-to-earnings (P/E) ratio: A valuation measure calculated by dividing the price of a stock by its reported earnings per share. The ratio is a measure of how much investors are willing to pay for the company’s earnings.

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, 2016 (Unaudited)

Statement of Assets and Liabilities
T. Rowe Price Institutional Emerging Markets Equity Fund
April 30, 2016 (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, 2016 (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 incepted on October 31, 2002. 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, if any, 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, if any, 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 May 2015, FASB issued ASU No. 2015-07, Fair Value Measurement (Topic 820), Disclosures for Investments in Certain Entities That Calculate Net Asset Value per Share (or Its Equivalent). The ASU removes the requirement to categorize within the fair value hierarchy all investments for which fair value is measured using the net asset value per share practical expedient and amends certain disclosure requirements for such investments. The ASU is effective for interim and annual reporting periods beginning after December 15, 2015. 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.

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) has been established 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, in its judgment, materially 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, 2016:

There were no material transfers between Levels 1 and 2 during the six months ended April 30, 2016.

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 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 market countries; at period-end, approximately 91% of the fund’s net assets were invested in emerging markets. Emerging 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.

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 either through the Shanghai-Hong Kong Stock Connect program (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 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 $209,311,000 and $263,937,000, respectively, for the six months ended April 30, 2016.

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, 2015, the fund had $184,831,000 of available capital loss carryforwards, which expire as follows: $20,924,000 in fiscal 2016, $124,951,000 in fiscal 2017, $2,830,000 in fiscal 2018, and $1,881,000 in fiscal 2019; $34,245,000 have no expiration. Further, $85,464,000 of the fund’s available capital loss carryforwards are subject to certain limitations on amount or timing of use related to an ownership change.

At April 30, 2016, the cost of investments for federal income tax purposes was $897,106,000. Net unrealized gain aggregated $58,989,000 at period-end, of which $142,473,000 related to appreciated investments and $83,484,000 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, 2016, the fund had no deferred tax liability attributable to foreign securities and $4,791,000 of foreign capital loss carryforwards, including $2,182,000 that expire in 2017, $791,000 that expire in 2020, $612,000 that expire in 2022, and $1,206,000 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 subadvisory 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 extraordinary expenses are paid directly by the fund.

In addition, other mutual funds, trusts, and other accounts managed by Price Associates or its affiliates (collectively, Price funds and accounts) may invest in the fund; however, no Price fund or account may invest for the purpose of exercising management or control over the fund. At April 30, 2016, 24% of the fund’s outstanding shares were held by Price funds and accounts.

The fund may invest in the T. Rowe Price Reserve Investment Fund, the T. Rowe Price Government Reserve Investment Fund, or the T. Rowe Price Short-Term Reserve Fund (collectively, the Price Reserve Investment Funds), open-end management investment companies managed by Price Associates and considered affiliates of the fund. The Price Reserve Investment 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 Investment 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, 2016, 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 website, troweprice.com. To access it, click on the words “Social Responsibility” at the top of our corporate homepage. Next, click on the words “Conducting Business Responsibly” on the left side of the page that appears. Finally, click on the words “Proxy Voting Policies” on the left side of the page that appears.

Each fund’s most recent annual proxy voting record is available on our website and through the SEC’s website. To access it through our website, follow the directions above to reach the “Conducting Business Responsibly” page. Click on the words “Proxy Voting Records” on the left side of that page, and then click on the “View Proxy Voting Records” link at the bottom of the page that appears.

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.

On March 11, 2016, the fund’s Board of Directors (Board), including a majority of the fund’s independent directors, approved 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 connection with its deliberations, the Board requested, and the Advisor provided, such information as the Board (with advice from independent legal counsel) deemed reasonably necessary. The Board considered a variety of factors in connection with its review of the Advisory Contract and Subadvisory Contract, also taking into account information provided by the Advisor during the course of the year, as discussed below:

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 reviewed the fund’s three-month, one-year, and year-by-year returns, as well as the fund’s average annualized total returns over the 3-, 5-, and 10-year periods, and compared these returns with a wide variety of previously agreed-upon comparable performance measures and market data, including those supplied by Lipper and Morningstar, which are independent providers 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 applicable fund’s portfolio transactions. The Board received information on the estimated costs incurred and profits realized by the Advisor from managing T. Rowe Price mutual 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. The Board noted that, 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
The Board was provided with information regarding industry trends in management fees and expenses, and the Board reviewed the fund’s management fee rate and total expense ratio in comparison with fees and expenses of other comparable funds based on information and data supplied by Lipper. For these purposes, the Board assumed that the fund’s management fee rate was equal to the all-inclusive management fee rate less the fund’s actual operating expenses, and the total expense ratio was equal to the all-inclusive management fee rate. The information provided to the Board indicated that the fund’s management fee rate was above the median for comparable funds and the fund’s total expense ratio was below the median for comparable funds.

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 it 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 mutual 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). The independent directors were advised throughout the process by independent legal counsel.

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 16, 2016

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 16, 2016


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

Date June 16, 2016

●	Emerging markets stocks were little changed over the six-month reporting period ended April 30, 2016, as losses in Asia countered gains in Brazilian stocks.
●	The Institutional Emerging Markets Equity Fund gained 2.01% and outperformed its benchmark and Lipper peer group.
●	Stock selection in China and Brazil boosted results relative to our benchmark, while our underweight to the energy and materials sectors detracted.
●	Valuations in emerging markets are attractive, and many stocks trade at a discount relative to their history.