T. Rowe Price Institutional Income Funds N-CSR Certified annual shareholder report (management investment company)

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: 811-21055

T. Rowe Price Institutional Income 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: May 31
 
 
Date of reporting period: May 31, 2019

Item 1. Reports to Shareholders

(a) Report pursuant to Rule 30e-1.

Institutional High Yield Fund May 31, 2019

Beginning on January 1, 2021, as permitted by SEC regulations, paper copies of the T. Rowe Price funds’ annual and semiannual shareholder reports will no longer be mailed, unless you specifically request them. Instead, shareholder reports will be made available on the funds’ website (troweprice.com/prospectus), and you will be notified by mail with a website link to access the reports each time a report is posted to the site.

If you already elected to receive reports electronically, you will not be affected by this change and need not take any action. At any time, shareholders who invest directly in T. Rowe Price funds may generally elect to receive reports or other communications electronically by enrolling attroweprice.com/paperlessor, if you are a retirement plan sponsor or invest in the funds through a financial intermediary (such as an investment advisor, broker-dealer, insurance company, or bank), by contacting your representative or your financial intermediary.

You may elect to continue receiving paper copies of future shareholder reports free of charge. To do so, if you invest directly with T. Rowe Price, please call T. Rowe Price as follows: IRA, nonretirement account holders, and institutional investors,1-800-225-5132; small business retirement accounts,1-800-492-7670. If you are a retirement plan sponsor or invest in the T. Rowe Price funds through a financial intermediary, please contact your representative or financial intermediary or follow additional instructions if included with this document. Your election to receive paper copies of reports will apply to all funds held in your account with your financial intermediary or, if you invest directly in the T. Rowe Price funds, with T. Rowe Price. Your election can be changed at any time in the future.

T. ROWE PRICE INSTITUTIONAL HIGH YIELD FUND

HIGHLIGHTS

■ The Institutional High Yield Fund posted a gain during our reporting period, performing approximately in line with the benchmark J.P. Morgan Global High Yield Index and outperforming its Lipper peer group average.

■ The combination of our higher-quality credit focus and underweight allocation in the energy industry was a top contributor to returns over the past year.

■ We are moving toward a more defensive positioning, but our analysts continue to find idiosyncratic situations that we believe have the potential to generate meaningful gains.

■ The macro environment currently has a significant influence on investor sentiment, and a degree of uncertainty is likely to persist.

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CIO Market Commentary

Dear Investor

Markets were extremely volatile in your fund’s fiscal year ended May 31, 2019, although well-diversified portfolios emerged with modest gains. Evidence of a slowdown in the global economy hampered equities but boosted bond returns by pushing down long-term interest rates.

The period started on a generally bright note. The U.S. economy shifted back into a higher gear in 2018, expanding at its fastest pace (2.9%) in three years due in part to stimulus from the December 2017 tax cuts and increased federal spending. Consumer confidence gauges rose as the unemployment rate fell, taking both to favorable levels not seen in two decades. Corporate earnings were particularly strong, with profits for the largest companies expanding by roughly 20% in 2018, thanks to the lower corporate tax rate and healthy revenues.

The continuing expansion encouraged the Federal Reserve to stay on its path of monetary tightening, with policymakers raising the federal funds rate once each quarter in 2018. Markets initially proved resilient to the hikes, but early signs of economic weakness led to worries that the Fed might be moving too quickly. The pace of home sales and new construction slowed in late 2018 as rising mortgage rates and a lack of entry-level homes weighed on affordability. Business investment also appeared to weaken, and gauges of manufacturing activity declined.

The Fed’s hikes eventually began to put pressure on markets. Fed Chair Jerome Powell told an interviewer on October 3 that interest rates were still “a long way” from a neutral level that would neither stimulate nor restrain the economy. Stocks sold off over the following days, and the yield on the benchmark 10-year Treasury note reached 3.25%, its highest level since 2011. (Bond prices and yields move in opposite directions.)

Growth signals worsened into the end of the year, bringing bond yields back down but weighing further on equities. The partial government shutdown that began in late December and lasted through much of January delivered another blow. The holiday sales season did not meet expectations, and measures of consumer confidence dropped sharply. The major equity benchmarks entered or neared bear market territory, defined as a decline of at least 20% from their recent highs.

The Fed responded to the slowdown and market turmoil with a “dovish pivot,” sending bond and stock prices sharply higher in early 2019. Powell and other Fed officials made assurances that they would respond to any pronounced slowdown with all the tools at their disposal and signaled that future rate hikes were in “pause” mode. Indeed, markets soon began pricing in a likelihood that the Fed’s next move would be to cut rates. Long-term bond yields tumbled dramatically, and the yield on the 10-year note ended May at 2.14%, well below its year-ago level of 2.83%.

The Fed also had to account for the impact of the trade tensions between the U.S. and China. Hopes that an all-out trade war might be averted helped lift the markets in the first four months of 2019, particularly after President Donald Trump stated that the two sides were “getting very close” to a deal. These hopes were dashed in early May, however, after the White House declared that negotiations had fallen through and then subsequently raised the tariff rate on many Chinese goods to 25% from 10%. The tit-for-tat tariff battle also seemed to be metastasizing into a “technological cold war,” with each country taking steps to limit the other’s access to critical components and raw materials.

The future course of U.S.-China trade relations is a central question facing investors. Unfortunately, I suspect that neither side is in the mood for compromise, with President Trump feeling the need to remain resolute before the 2020 election and Chinese officials equally eager to deny him a victory, and potentially willing to wait to negotiate with his successor.

One way we’ll monitor these developments is through weekly and monthly meetings of our investment teams, where our managers, analysts, economists, and legislative specialists share observations and insights. While further turbulence in the markets seems likely, I’m confident that our uniquely collaborative approach will continue to serve our shareholders well.

Thank you for your continued confidence in T. Rowe Price.

Sincerely,

Robert Sharps
Group Chief Investment Officer

Management’s Discussion of Fund Performance

INVESTMENT OBJECTIVE

The fund seeks high current income and, secondarily, capital appreciation.

FUND COMMENTARY

How did the fund perform in the past 12 months?

The Institutional High Yield Fund returned 5.69%in the 12 months ended May 31, 2019, performing approximately in line with its benchmark, the J.P. Morgan Global High Yield Index, and outperforming its Lipper peer group average.Past performance cannot guarantee future results.)

What factors influenced the fund’s performance?

We experienced three distinct cycles in the past 12 months. After financial markets benefited from a relatively sanguine environment from the beginning of our fiscal year through September 2018, significant volatility took hold that weighed on the performance of risk assets in the fourth quarter. Then the Federal Reserve’s pivot from an outlook that called for multiple rate hikes in 2019 to no rate hikes significantly improved sentiment in the high yield asset class in the early months of this year.

The fund’s global footprint is an important consideration when evaluating our results over the past year. In terms of regional exposure, the fund’s allocations to the U.S. and, to a lesser extent, emerging markets were the top contributors to relative results, while our European holdings were a performance drag. European high yield significantly underperformed other regions during the first half of 2018 and then came under pressure in the fourth quarter amid growingBrexit anxiety. Despite the recovery in 2019, the portfolio’s European holdings lagged the performance of the benchmark’s allocation to the region for most of the period.

Floating rate bank loans—our largest off-index allocation—helped dampen portfolio volatility, especially during the fourth quarter. The loan asset class has historically performed well relative to other fixed income segments during periods of rising interest rates. Although bank loans traded lower in November and December as the market adjusted to a new Federal Reserve narrative and reduced its expectations for further rate hikes, leveraged loans posted gains in 2018 compared with high yield market declines.

The fund’s exposure to currency forward contracts also contributed to absolute performance during our reporting period. We use currency forwards to hedge any non-U.S. dollar-denominated bond exposure and do not place active currency bets. Overall, we aim to have the value add sourced from credit selection.

Energy is the largest industry in the high yield market. The combination of our higher-quality credit focus and underweight allocation to the energy industry was a top contributor to returns over the past year. The portfolio’s subsector exposure includes an overweight to midstream credits, an underweight to services, and a focus on high-quality exploration and production (E&P) companies. Energy was the index segment that posted the weakest results in the 12-month period, and our defensive positioning enabled the portfolio to generate stronger relative performance in the sector.

In the health care segment,AvantorandBausch Healthwere notable relative performance contributors. Avantor, a leading provider of product and service solutions to laboratory and production companies, has become one of our highest-conviction holdings. Its acquisition of VWR has created synergies, and its end markets are improving. Avantor’s recently completed initial public offering was supportive for the credit as a large portion of the proceeds will be used to pay down debt. Additionally, the nature of Avantor’s business means that its products have applications across a broad segment of the health care sector, and the company is not subject to government regulation. (Please refer to the portfolio of investments for a complete list of holdings and the amount each represents in the portfolio.)

Bausch Health is a global company that develops, manufactures, and markets a broad range of pharmaceutical, medical device, and over-the-counter products. Although it carries significant debt on its balance sheet, management has been making progress on reducing leverage. Additionally, we believe that the company’s fundamentals are improving asBausch has a highly stable, growing business in contact lenses and ophthalmology. The company is also not exposed to the situations—such as litigation related to the opioid crisis—that are currently weighing on the performance of some areas of the health care sector.

While energy was the top sector-level contributor to results over the past year, several energy names were among the portfolio’s notable detractors, although we were able to minimize the performance drag relative to the benchmark. Weakness in the oil and gas segments largely reflects a slowing economy as well as concerns that a protracted U.S.-China trade conflict could have negative long-term implications for global demand.

One area of particular stress in the energy industry is the natural gas space, where horizontal drilling and fracking have created the potential for an enormous amount of new supply to enter the market. Over the past year, this dynamic weighed on the performance of portfolio holdings including private natural gas E&PcompanyVine Oil & GasandGulfport Energy, one of the nation’s largest natural gas producers.

How is the fund positioned?

We are moving toward a more defensive positioning, as there is currently less relative value in the market than early in the year. Nevertheless, our analysts continue to find idiosyncratic situations, such as Avantor, that we believe have the potential to generate meaningful gains.

As part of our defensive strategy, we established a small position in five-year Treasuries during April. This was intended to be somewhat of an insurance policy in the event that potential negative outcomes—such as trade negotiations dissolving—came to pass. This hedge contributed to the portfolio’s performance in May when escalating trade disputes increased the attractiveness of safe-haven government debt.

We have increased the portfolio’s exposure to utilities, which, in our view, is one of the most attractive and defensive industries in a slowing economy. Specifically, we added a modest allocation to the investment-grade utility space in California, and three of the portfolio’s convertible preferred positions are utilities. In addition to attractive coupons, these securities fromAmerican Electric Power,NextEra Energy, andSempra Energyprovide upside potential if the equities perform well.

Investing at the short end of the maturity spectrum has become another important aspect of our defensive positioning, and we have been buying bonds that mature within five years whenever possible. We believe this increases the probability of a positive outcome because capital markets should remain open to refinancing these bonds.

What is portfolio management’s outlook?

The macro environment currently has a significant influence on investor sentiment. Slowing economic growth, the Fed’s interest rate strategy, trade tensions, and the upcoming U.S. presidential election have created a cloud of uncertainty that is likely to persist—particularly if the Fed remains on hold. Investors are eagerly anticipating an “insurance” rate cut that would support the performance of financial markets, but this may not occur. Nevertheless, the current environment is broadly supportive for fixed income strategies, as coupon payments provide a reliable income source that enhances the appeal of bonds amid turbulent market conditions.

The high yield asset class continues to demonstrate its resilience. After posting a loss in 2018, the high yield market began this year with its strongest quarterly performance since 2009. Steady economic growth, albeit at a slower pace, creates a healthy environment for below investment-grade companies. Limited new supply and recent inflows to the asset class have created favorable technical conditions, and we expect default activity to remain low in the next 12 months. Although the economy is slowing, barring a precipitous further deceleration, the pace of growth should be sufficient to support issuers’ fundamentals and sustain credit quality trends.

The views expressed reflect the opinions of T. Rowe Price as of the date of this report and are subject to change based on changes in market, economic, or other conditions. These views are not intended to be a forecast of future events and are no guarantee of future results.

RISKS OF BOND INVESTING

Bonds are subject to interest rate risk, the decline in bond prices that usually accompanies a rise in interest rates, and credit risk, the chance that any fund holding could have its credit rating downgraded or that a bond issuer will default (fail to make timely payments of interest or principal), potentially reducing the fund’s income level and share price. High yield corporate bonds could have greater price declines than funds that invest primarily in high-quality bonds. Companies issuing high yield bonds are not as strong financially as those with higher credit ratings, so the bonds are usually considered to be speculative investments.Bank loans may at times become difficult to value and highly illiquid; they are subject to credit risk such as nonpayment of principal or interest and risks of bankruptcy and insolvency.

Investing in the securities of non-U.S. issuers involves special risks not typically associated with investing in U.S. issuers. Foreign securities tend to be more volatile and less liquid than investments in U.S. securities and may lose value because of adverse local, political, social, or economic developments overseas or due to changes in the exchange rates between foreign currencies and the U.S. dollar. In addition, foreign investments are subject to settlement practices and regulatory and financial reporting standards that differ from those of the U.S. These risks are heightened for the fund’s investments in emerging markets, which are more susceptible to governmental interference, less efficient trading markets, and the imposition of local taxes or restrictions on gaining access to sales proceeds for foreign investors.

GROWTH OF $1 MILLION

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 include a broad-based market index and may also include 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.

AVERAGE ANNUAL COMPOUND TOTAL RETURN

FUND EXPENSE EXAMPLE

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.

QUARTER-END RETURNS

The accompanying notes are an integral part of these financial statements.

The accompanying notes are an integral part of these financial statements.

The accompanying notes are an integral part of these financial statements.

The accompanying notes are an integral part of these financial statements.

The accompanying notes are an integral part of these financial statements.

NOTES TO FINANCIAL STATEMENTS

T. RowePrice Institutional Income Funds, Inc. (the corporation) is registered under the Investment Company Act of 1940 (the 1940 Act). The Institutional High Yield Fund (the fund) is a diversified, open-end management investment company established by the corporation. The fund seeks high current income and, secondarily, capital appreciation.

NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES

Basis of PreparationThe fund is an investment company and follows accounting and reporting guidance in the Financial Accounting StandardsBoard (FASB)Accounting Standards CodificationTopic 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. GAAPrequires 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. Certain prior year amounts in the accompanying financial statements and financial highlights have been restated to conform to current year presentation.

Investment Transactions, Investment Income, and DistributionsInvestment transactions are accounted for on the trade date basis. Income and expenses are recorded on the accrual basis. Realized gains and losses are reported on the identified cost basis.Premiums and discounts on debt securities are amortized for financial reporting purposes.Paydown gains and losses are recorded as an adjustment to interest income. Income tax-related interest and penalties, if incurred, are recorded as income tax expense. 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. Distributions to shareholders are recorded on the ex-dividend date. Income distributions are declared daily and paid monthly. A capital gain distribution may also be declared and paid by the fund annually.

Currency TranslationAssets, 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 respective date of such transaction. The effect of changes in foreign currency exchange rates on realized and unrealized security gains and losses is not bifurcated from the portion attributable to changes in market prices.

Redemption FeesPrior to April 1, 2019, a 2%fee was 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 were withheld from proceeds that shareholders received from the sale or exchange of fund shares. The fees were paid to the fund and were recorded as an increase to paid-in capital. The fees may have caused the redemption price per share to differ from the net asset value per share.

New Accounting GuidanceIn March 2017, the FASBissued amended guidance to shorten the amortization period for certain callable debt securities held at a premium. The guidance is effective for fiscal years and interim periods beginning after December 15, 2018. Adoption will have no effect on the fund’s net assets or results of operations.

IndemnificationIn the normal course of business, the fund may provide indemnification in connection with its officers and directors, service providers, and/or private company investments. The fund’s maximum exposure under these arrangements is unknown; however, the risk of material loss is currently considered to be remote.

NOTE 2 - VALUATION

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 ValueThe fund’s financial instruments are reported at fair value, which GAAPdefines 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. RowePrice Valuation Committee (the Valuation Committee) is an internal committee that has been delegated certain responsibilities by the fund’sBoard of Directors (theBoard) to ensure that financial instruments are appropriately priced at fair value in accordance with GAAPand the 1940 Act. Subject to oversight by theBoard, 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; determinespricing 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 theBoard 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. GAAPestablishes 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)

Level 3 – unobservable inputs

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. GAAPrequires 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 TechniquesDebt securities generally are traded in the over-the-counter (OTC) market and are valued at prices furnished by dealers who make markets in such securities or by an independent pricing service, which considers the yield or price of bonds of comparable quality, coupon, maturity, and type, as well as prices quoted by dealers who make markets in such securities. Generally, debt securities are categorized in Level 2 of the fair value hierarchy; however, to the extent the valuations include significant unobservable inputs, the securities would be categorized in Level 3.

Equity securities listed or regularly traded on a securities exchange or in the 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. OTCBulletinBoard 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. OTCBulletinBoard 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. Forward currency exchange contracts are valued using the prevailing forward exchange rate and are categorized in Level 2 of the fair value hierarchy. Swaps are valued at prices furnished by an independent pricing service or independent swap dealers and generally are categorized in Level 2 of the fair value hierarchy; however, if unobservable inputs are significant to the valuation, the swap would be categorized in Level 3. 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 theBoard, 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 troubled or thinly traded debt instruments, 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, 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 a discount or premium from market value of a similar, freely traded security of the same issuer; discounted cash flows; yield to maturity; 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 InputsThe following table summarizes the fund’s financial instruments, based on the inputs used to determine their fair values on May 31, 2019 (for further detail by category, please refer to the accompanyingPortfolio of Investments):

Following is a reconciliation of the fund’s Level 3 holdings for the year ended May 31, 2019. Gain (loss) reflects both realized and change in unrealized gain/loss on Level 3 holdings during the period, if any, and is included on the accompanying Statement of Operations. The change in unrealized gain/loss on Level 3 instruments held at May 31, 2019, totaled $(124,000) for the year ended May 31, 2019. During the year, transfers into Level 3 resulted from a lack of observable market data for the security and transfers out of Level 3 were because observable market data became available for the security.

NOTE 3 - DERIVATIVE INSTRUMENTS

During the year ended May 31, 2019, the fund invested in derivative instruments. As defined by GAAP, a derivative is a financial instrument whose value is derived from an underlying security price, foreign exchange rate, interest rate, index of prices or rates, or other variable; it requires little or no initial investment and permits or requires net settlement. The fund invests in derivatives only if the expected risks and rewards are consistent with its investment objectives, policies, and overall risk profile, as described in its prospectus and Statement of Additional Information. The fund may use derivatives for a variety of purposes, such as seeking to hedge against declines in principal value, increase yield, invest in an asset with greater efficiency and at a lower cost than is possible through direct investment, to enhance return, or to adjust portfolio duration and credit exposure. The risks associated with the use of derivatives are different from, and potentially much greater than, the risks associated with investing directly in the instruments on which the derivatives are based. The fund at all times maintains sufficient cash reserves, liquid assets, or other SEC-permitted asset types to cover its settlement obligations under open derivative contracts.

The fund values its derivatives at fair value and recognizes changes in fair value currently in its results of operations. Accordingly, the fund does not follow hedge accounting, even for derivatives employed as economic hedges. Generally, the fund accounts for its derivatives on a gross basis. It does not offset the fair value of derivative liabilities against the fair value of derivative assets on its financial statements, nor does it offset the fair value of derivative instruments against the right to reclaim or obligation to return collateral.

The following table summarizes the fair value of the fund’s derivative instruments held as of May 31, 2019, and the related location on the accompanying Statement of Assets and Liabilities, presented by primary underlying risk exposure:

Additionally, the amount of gains and losses on derivative instruments recognized in fund earnings during the year ended May 31, 2019, and the related location on the accompanying Statement of Operations is summarized in the following table by primary underlying risk exposure:

Counterparty Risk and CollateralThe fund invests in derivatives in various markets, which expose it to differing levels of counterparty risk. Counterparty risk on exchange-traded and centrally cleared derivative contracts, such as futures, exchange-traded options, and centrally cleared swaps, is minimal because the clearinghouse provides protection against counterparty defaults. For futures and centrally cleared swaps, the fund is required to deposit collateral in an amount specified by the clearinghouse and the clearing firm (margin requirement), and the margin requirement must be maintained over the life of the contract. Each clearinghouse and clearing firm, in its sole discretion, may adjust the margin requirements applicable to the fund.

Derivatives, such as bilateral swaps, forward currency exchange contracts, and OTC options that are transacted and settle directly with a counterparty (bilateral derivatives) may expose the fund to greater counterparty risk. To mitigate this risk, the fund has entered into master netting arrangements (MNAs) with certain counterparties that permit net settlement under specified conditions and, for certain counterparties, also require the exchange of collateral to cover mark-to-market exposure. MNAs may be in the form of International Swaps and Derivatives Association master agreements (ISDAs) or foreign exchange letter agreements (FX letters).

MNAs provide the ability to offset amounts the fund owes a counterparty against amounts the counterparty owes the fund (net settlement).Both ISDAs and FX letters generally allow termination of transactions and net settlement upon the occurrence of contractually specified events, such as failure to pay or bankruptcy. In addition, ISDAs specify other events, the occurrence of which would allow one of the parties to terminate. For example, a downgrade in credit rating of a counterparty below a specified rating would allow the fund to terminate, while a decline in the fund’s net assets of more than a specified percentage would allow the counterparty to terminate. Upon termination, all transactions with that counterparty would be liquidated and a net termination amount settled. ISDAs include collateral agreements whereas FX letters do not. Collateral requirements are determined daily based on the net aggregate unrealized gain or loss on all bilateral derivatives with a counterparty, subject to minimum transfer amounts that typically range from $100,000 to $250,000. Any additional collateral required due to changes in security values is typically transferred the same business day.

Collateral may be in the form of cash or debt securities issued by the U.S. government or related agencies. Cash posted by the fund is reflected as cash deposits in the accompanying financial statements and generally is restricted from withdrawal by the fund; securities posted by the fund are so noted in the accompanyingPortfolio of Investments; both remain in the fund’s assets. Collateral pledged by counterparties is not included in the fund’s assets because the fund does not obtain effective control over those assets. For bilateral derivatives, collateral posted or received by the fund is held in a segregated account at the fund’s custodian. While typically not sold in the same manner as equity or fixed income securities, exchange-traded or centrally cleared derivatives may be closed out only on the exchange or clearinghouse where the contracts were traded, and OTC and bilateral derivatives may be unwound with counterpartiesor transactions assigned to other counterparties to allow the fund to exit the transaction. This ability is subject to the liquidity of underlying positions. As of May 31, 2019, securities valued at $480,000 had been posted by the fund to counterparties for bilateral derivatives. As of May 31, 2019, collateral pledged by counterparties to the fund for bilateral derivatives consisted of $510,000 cash. As of May 31, 2019, securities valued at $254,000 had been posted by the fund for exchange-traded and/or centrally cleared derivatives.

Forward Currency Exchange ContractsThe fund is subject to foreign currency exchange rate risk in the normal course of pursuing its investment objectives. It uses forward currency exchange contracts (forwards) primarily to protect its non-U.S. dollar-denominated securities from adverse currency movements. A forward involves an obligation to purchase or sell a fixed amount of a specific currency on a future date at a price set at the time of the contract. Although certain forwards may be settled by exchanging only the net gain or loss on the contract, most forwards are settled with the exchange of the underlying currencies in accordance with the specified terms. Forwards are valued at the unrealized gain or loss on the contract, which reflects the net amount the fund either is entitled to receive or obligated to deliver, as measured by the difference between the forward exchange rates at the date of entry into the contract and the forward rates at the reporting date. Appreciated forwards are reflected as assets and depreciated forwards are reflected as liabilities on the accompanying Statement of Assets and Liabilities. Risks related to the use of forwards include the possible failure of counterparties to meet the terms of the agreements; that anticipated currency movements will not occur, thereby reducing the fund’s total return; and the potential for losses in excess of the fund’s initial investment. During the year ended May 31, 2019, the volume of the fund’s activity in forwards, based on underlying notional amounts, was generally between 1%and 3%of net assets.

OptionsThe fund is subject to credit risk in the normal course of pursuing its investment objectives and uses options to help manage such risk. The fund may use options to manage exposure to security prices, interest rates, foreign currencies, and credit quality; as an efficient means of adjusting exposure to all or a part of a target market; to enhance income; as a cash management tool; or to adjust credit exposure. Options are included in net assets at fair value, options purchased are included in Investments in Securities, and Options written are separately reflected as a liability on the accompanying Statement of Assets and Liabilities.Premiums on unexercised, expired options are recorded as realized gains or losses; premiums on exercised options are recorded as an adjustment to the proceeds from the sale or cost of the purchase. The difference between the premium and the amount received or paid in a closing transaction is also treated as realized gain or loss. In return for a premium paid, options on swaps give the holder the right, but not the obligation, to enter a specified swap contract on predefined terms. The exercise price of an option on a credit default swap is stated in terms of a specified spread that represents the cost of credit protection on the reference asset, including both the upfront premium to open the position and future periodic payments. The exercise price of an interest rate swap is stated in terms of a fixed interest rate; generally, there is no upfront payment to open the position. Risks related to the use of options include possible illiquidity of the options markets; trading restrictions imposed by an exchange or counterparty; movements in the underlying asset values and credit ratings; and for options written, potential losses in excess of the fund’s initial investment. During the year ended May 31, 2019, the volume of the fund’s activity in options, based on underlying notional amounts, was generally between 0%and 5%of net assets.

SwapsThe fund is subject to credit risk in the normal course of pursuing its investment objectives and uses swap contracts to help manage such risk. The fund may use swaps in an effort to manage both long and short exposure to changes in interest rates, inflation rates, and credit quality; to adjust overall exposure to certain markets; to enhance total return or protect the value of portfolio securities; to serve as a cash management tool; or to adjust portfolio duration and credit exposure. Swap agreements can be settled either directly with the counterparty (bilateral swap) or through a central clearinghouse (centrally cleared swap). Fluctuations in the fair value of a contract are reflected in unrealized gain or loss and are reclassified to realized gain or loss upon contract termination or cash settlement. Net periodic receipts or payments required by a contract increase or decrease, respectively, the value of the contract until the contractual payment date, at which time such amounts are reclassified from unrealized to realized gain or loss. For bilateral swaps, cash payments are made or received by the fund on a periodic basis in accordance with contract terms; unrealized gain on contracts and premiums paid are reflected as assets and unrealized loss on contracts and premiums received are reflected as liabilities on the accompanying Statement of Assets and Liabilities. For bilateral swaps, premiums paid or received are amortized over the life of the swap and are recognized as realized gain or loss in the Statement of Operations. For centrally cleared swaps, payments are made or received by the fund each day to settle the daily fluctuation in the value of the contract (variation margin). Accordingly, the value of a centrally cleared swap included in net assets is the unsettled variation margin; net variation margin receivable is reflected as an asset and net variation margin payable is reflected as a liability on the accompanying Statement of Assets and Liabilities.

Credit default swaps are agreements where one party (the protection buyer) agrees to make periodic payments to another party (the protection seller) in exchange for protection against specified credit events, such as certain defaults and bankruptcies related to an underlying credit instrument, or issuer or index of such instruments. Upon occurrence of a specified credit event, the protection seller is required to pay the buyer the difference between the notional amount of the swap and the value of the underlying credit, either in the form of a net cash settlement or by paying the gross notional amount and accepting delivery of the relevant underlying credit. For credit default swaps where the underlying credit is an index, a specified credit event may affect all or individual underlying securities included in the index and will be settled based upon the relative weighting of the affected underlying security(ies) within the index. Generally, the payment risk for the seller of protection is inversely related to the current market price or credit rating of the underlying credit or the market value of the contract relative to the notional amount, which are indicators of the markets’ valuation of credit quality. As of May 31, 2019, the notional amount of protection sold by the fund totaled $7,109,000 (0.5%of net assets), which reflects the maximum potential amount the fund could be required to pay under such contracts. Risks related to the use of credit default swaps include the possible inability of the fund to accurately assess the current and future creditworthiness of underlying issuers, the possible failure of a counterparty to perform in accordance with the terms of the swap agreements, potential government regulation that could adversely affect the fund’s swap investments, and potential losses in excess of the fund’s initial investment.

During the year ended May 31, 2019, the volume of the fund’s activity in swaps, based on underlying notional amounts, was generally between 2%and 5%of net assets.

NOTE 4 - OTHER INVESTMENT TRANSACTIONS

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.

Noninvestment-Grade DebtAt May 31, 2019, approximately 92%of the fund’s net assets were invested, either directly or through its investment in T. RowePrice institutional funds, in noninvestment-grade debt including “high yield” or “junk” bonds or leveraged loans. Noninvestment-grade debt issuers are more likely to suffer an adverse change in financial condition that would result in the inability to meet a financial obligation. The noninvestment-grade debt market may experience sudden and sharp price swings due to a variety of factors, including changes in economic forecasts, stock market activity, large sustained sales by major investors, a high-profile default, or a change in market sentiment. These events may decrease the ability of issuers to make principal and interest payments and adversely affect the liquidity or value, or both, of such securities. Accordingly, securities issued by such companies carry a higher risk of default and should be considered speculative.

Restricted SecuritiesThe fund may invest in securities that are subject to legal or contractual restrictions on resale.Prompt sale of such securities at an acceptable price may be difficult and may involve substantial delays and additional costs.

Bank LoansThe fund may invest in bank loans, which represent an interest in amounts owed by a borrower to a syndicate of lenders.Bank loans are generally noninvestment grade and often involve borrowers whose financial condition is highly leveraged.Bank loans may be in the form of either assignments or participations. A loan assignment transfers all legal, beneficial, and economic rights to the buyer, and transfer typically requires consent of both the borrower and agent. In contrast, a loan participation generally entitles the buyer to receive the cash flows from principal, interest, and any fee payments on a portion of a loan; however, the seller continues to hold legal title to that portion of the loan. As a result, the buyer of a loan participation generally has no direct recourse against the borrower and is exposed to credit risk of both the borrower and seller of the participation.Bank loans often have extended settlement periods, generally may be repaid at any time at the option of the borrower, and may require additional principal to be funded at the borrowers’ discretion at a later date (e.g. unfunded commitments and revolving debt instruments). Until settlement, the fund maintains liquid assets sufficient to settle its unfunded loan commitments. The fund reflects both the funded portion of a bank loan as well as its unfunded commitment in thePortfolio of Investments. However, if a credit agreement provides no initial funding of a tranche and funding of the full commitment at a future date(s) is at the borrower’s discretion and considered uncertain, a loan is reflected in thePortfolio of Investments only if, and only to the extent that, the fund has actually settled a funding commitment. At May 31, 2019, the fund’s total unfunded commitments not included in thePortfolio of Investments were $10,900,000.

OtherPurchases and sales of portfolio securities other than short-term securities aggregated $918,293,000 and $828,351,000, respectively, for the year ended May 31, 2019.

NOTE 5 - FEDERAL INCOME TAXES

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.

The fund files U.S. federal, state, and local tax returns as required. The fund’s tax returns are subject to examination by the relevant tax authorities until expiration of the applicable statute of limitations, which is generally three years after the filing of the tax return but which can be extended to six years in certain circumstances. Tax returns for open years have incorporated no uncertain tax positions that require a provision for income taxes.

Financial reporting records are adjusted for permanent book/tax differences to reflect tax character but are not adjusted for temporary differences. The permanent book/tax adjustments have no impact on results of operations or net assets and relate primarily to the recharacterization of distributions and differences between book/tax amortization policies.

Distributions during the years ended May 31, 2019 and May 31, 2018, totaled $86,581,000 and $96,827,000, respectively, and were characterized as ordinary income for tax purposes. At May 31, 2019, the tax-basis cost of investments, including derivatives, and components of net assets were as follows:

The difference between book-basis and tax-basis net unrealized appreciation (depreciation) is attributable to the recognition of market discount and premium amortization for tax purposes. The fund intends to retain realized gains to the extent of available capital loss carryforwards. Net realized capital losses may be carried forward indefinitely to offset future realized capital gains.

NOTE 6 - RELATED PARTY TRANSACTIONS

The fund is managed by T. RowePrice Associates, Inc. (Price Associates), a wholly owned subsidiary of T. RowePrice Group, Inc. (Price Group). The investment management and administrative agreement between the fund andPrice Associates provides for an all-inclusive annual fee equal to 0.50%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; expenses related to borrowing, taxes, and brokerage and other transaction costs; and other non-recurring expenses permitted by the investment management agreement are paid directly by the fund.

Mutual funds, trusts, and other accounts managed byPrice Associates or its affiliates (collectively,Price Funds and accounts) may invest in the fund. NoPrice fund or account may invest for the purpose of exercising management or control over the fund. At May 31, 2019, approximately 29%of the fund’s outstanding shares were held byPrice Funds and accounts.

The fund may invest its cash reserves in certain open-end management investment companies managed byPrice Associates and considered affiliates of the fund: the T. RowePrice Government Reserve Fund or the T. RowePrice Treasury Reserve Fund, organized as money market funds, or the T. RowePrice Short-Term Fund, a short-term bond fund (collectively, thePrice Reserve Funds). ThePrice Reserve Funds are offered as short-term investment options to mutual funds, trusts, and other accounts managed byPrice Associates or its affiliates and are not available for direct purchase by members of the public. Cash collateral from securities lending is invested in the T. RowePrice Short-Term Fund. ThePrice Reserve Funds pay no investment management fees.

The fund may participate in securities purchase and sale transactions with other funds or accounts advised byPrice Associates (cross trades), in accordance with procedures adopted by the fund’sBoard 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 year ended May 31, 2019, the fund had no purchases or sales cross trades with other funds or accounts advised byPrice Associates.

Report of Independent Registered Public Accounting Firm

To the Board of Directors of T. Rowe Price Institutional Income Funds, Inc. and
Shareholders of T. Rowe Price Institutional High Yield Fund

Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of T. RowePrice Institutional High Yield Fund (one of the funds constituting T. RowePrice Institutional Income Funds, Inc., hereafter referred to as the “Fund”) as of May 31, 2019, the related statement of operations for the year ended May 31, 2019, the statement of changes in net assets for each of the two years in the period ended May 31, 2019, including the related notes, and the financial highlights for each of the five years in the period ended May 31, 2019 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of May 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended May 31, 2019 and the financial highlights for each of the five years in the period ended May 31, 2019 in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with thePublic Company Accounting OversightBoard (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and thePCAOB.

We conducted our audits of these financial statements in accordance with the standards of thePCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of May 31, 2019 by correspondence with the custodians, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.

PricewaterhouseCoopers LLP
Baltimore, Maryland
July 19, 2019

We have served as the auditor of one or more investment companies in the T. RowePrice group of investment companies since 1973.

TAX INFORMATION (UNAUDITED) FOR THE TAX YEAR ENDED 5/31/19

We are providing this information as required by the Internal Revenue Code. The amounts shown may differ from those elsewhere in this report because of differences between tax and financial reporting requirements.

The fund’s distributions to shareholders included $1,275,000 from short-term capital gains.

For taxable non-corporate shareholders, $1,782,000 of the fund’s income represents qualified dividend income subject to long-term capital gains tax rate of not greater than 20%.

For corporate shareholders, $1,724,000 of the fund’s income qualifies for the dividends-received deduction.

INFORMATION ON PROXY VOTING POLICIES, PROCEDURES, AND RECORDS

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:

https://www3.troweprice.com/usis/corporate/en/utility/policies.html

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.

HOW TO OBTAIN QUARTERLY PORTFOLIO HOLDINGS

Effective for reporting periods on or after March 1, 2019, the fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. Prior to March 1, 2019, the fund filed a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. The fund’s Forms N-PORT and N-Q are available electronically on the SEC’s website (sec.gov).

APPROVAL OF INVESTMENT MANAGEMENT AGREEMENT

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) on behalf of the fund. In that regard, at an in-person meeting held on March 11–12, 2019 (Meeting), the Board, including a majority of the fund’s independent directors, approved the continuation of the fund’s Advisory Contract. At the Meeting, the Board considered the factors and reached the conclusions described below relating to the selection of the Advisor and the approval of the Advisory Contract. The independent directors were assisted in their evaluation of the Advisory 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, 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 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
The Board considered the nature, quality, and extent of the services provided to the fund by the Advisor. 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 senior management team 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.

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, 2018, 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) 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 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. The Advisor has generally implemented an all-inclusive management fee structure in situations where a fixed total expense ratio is useful for purposes of providing certainty of fees and expenses for the investors in these funds and has historically sought to set the initial all-inclusive fee rate at levels below the expense ratios of comparable funds to take into account the potential future economies of scale. Assets of the fund are included in the calculation of the group fee rate, which serves as a component of the management fee for many T. Rowe Price funds and declines at certain asset levels based on the combined average netassets of most of the T. Rowe Price funds (including the fund). Although the fund does not have a group fee component to its management fee, its assets are included in the calculation because the primary investment resources utilized to manage the fund are shared with other actively managed funds. The Board concluded that, based on the profitability data it reviewed and consistent with this all-inclusive management fee structure, the advisory fee structure for the fund continued to be appropriate.

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 nonmanagement expenses of the fund with a group of competitor funds selected by Broadridge (Expense Group) and (ii) total expenses, actual management fees, and nonmanagement of the fund with 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, and total expenses (all of which generally reflect the all-inclusive management fee rate and do not deduct the operating expenses paid by the Advisor as part of the overall management fee) 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 first quintile (Expense Group), the fund’s actual management fee rate ranked in the second quintile (Expense Group and Expense Universe), and the fund’s total expenses ranked in the first 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
As noted, the Board approved the continuation of the Advisory 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 (including the fees to be charged for services thereunder).

ABOUT THE FUND’S DIRECTORS AND OFFICERS

Your fund is overseen by a Board of Directors (Board) that meets regularly to review a wide variety of matters affecting or potentially affecting the fund, including performance, investment programs, compliance matters, advisory fees and expenses, service providers, and business and regulatory affairs. The Board elects the fund’s officers, who are listed in the final table. At least 75% of the Board’s members are independent of the Boards of T. Rowe Price Associates, Inc. (T. Rowe Price), and its affiliates; “inside” or “interested” directors are employees or officers of T. Rowe Price. The business address of each director and officer is 100 East Pratt Street, Baltimore, Maryland 21202. The Statement of Additional Information includes additional information about the fund directors and is available without charge by calling a T. Rowe Price representative at 1-800-638-5660.

INDEPENDENT DIRECTORS(a)
Name (Year of Birth) Year Elected [Number of T. Rowe Price Portfolios Overseen]	Principal Occupation(s) and Directorships of Public Companies and Other Investment Companies During the Past Five Years
Teresa Bryce Bazemore (1959) 2018 [188]	President, Radian Guaranty (2008 to 2017); Chief Executive Officer, Bazemore Consulting LLC (2018 to present); Director, Chimera Investment Corporation (2017 to present); Director, Federal Home Loan Bank of Pittsburgh (2017 to present)
Ronald J. Daniels (1959) 2018 [188]	President, The Johns Hopkins University(b) and Professor, Political Science Department, The Johns Hopkins University (2009 to present); Director, Lyndhurst Holdings (2015 to present)
Bruce W. Duncan (1951) 2013 [188]	Chief Executive Officer and Director (January 2009 to December 2016), Chairman of the Board (January 2016 to present), and President (January 2009 to September 2016), First Industrial Realty Trust, an owner and operator of industrial properties; Chairman of the Board (2005 to September 2016) and Director (1999 to September 2016), Starwood Hotels & Resorts, a hotel and leisure company; Member, Investment Company Institute Board of Governors (2017 to present); Member, Independent Directors Council Governing Board (2017 to present); Senior Advisor, KKR (November 2018 to present); Director, Boston Properties (May 2016 to present); Director, Marriott International, Inc. (September 2016 to present)
Robert J. Gerrard, Jr. (1952) 2013 [188]	Advisory Board Member, Pipeline Crisis/Winning Strategies, a collaborative working to improve opportunities for young African Americans (1997 to 2016); Chairman of the Board, all funds (July 2018 to present)
Paul F. McBride (1956) 2013 [188]	Advisory Board Member, Vizzia Technologies (2015 to present); Board Member, Dunbar Armored (2012 to 2018)
Cecilia E. Rouse, Ph.D. (1963) 2013 [188]	Dean, Woodrow Wilson School (2012 to present); Professor and Researcher, Princeton University (1992 to present); Director, MDRC, a nonprofit education and social policy research organization (2011 to present); Member, National Academy of Education (2010 to present); Research Associate of Labor Studies Program at the National Bureau of Economic Research (2011 to 2015); Board Member, National Bureau of Economic Research (2011 to present); Chair of Committee on the Status of Minority Groups in the Economic Profession of the American Economic Association (2012 to 2018); Vice President (2015 to 2016), Board Member, American Economic Association (2018 to present)
John G. Schreiber (1946) 2002 [188]	Owner/President, Centaur Capital Partners, Inc., a real estate investment company (1991 to present); Cofounder, Partner, and Cochairman of the Investment Committee, Blackstone Real Estate Advisors, L.P. (1992 to 2015); Director, Blackstone Mortgage Trust, a real estate finance company (2012 to 2016); Director and Chairman of the Board, Brixmor Property Group, Inc. (2013 to present); Director, Hilton Worldwide (2007 to present); Director, Hudson Pacific Properties (2014 to 2016); Director, Invitation Homes (2014 to 2017); Director, JMB Realty Corporation (1980 to present)
Mark R. Tercek(c) (1957) 2009 [0]	President and Chief Executive Officer, The Nature Conservancy (2008 to present)
(a)All information about the independent directors was current as of February 19, 2019, unless otherwise indicated, except for the number of portfolios overseen, which is current as of the date of this report.
(b)William J. Stromberg, president and chief executive officer of T. Rowe Price Group, Inc., the parent company of the Price Funds’ investment advisor, has served on the Board of Trustees of Johns Hopkins University since 2014 and is a member of the Johns Hopkins University Board’s Compensation Committee.
(c)Effective February 15, 2019, Mr. Tercek resigned from his role as independent director of the Price Funds.
INSIDE DIRECTORS
Name (Year of Birth) Year Elected* [Number of T. Rowe Price Portfolios Overseen]	Principal Occupation(s) and Directorships of Public Companies and Other Investment Companies During the Past Five Years
David Oestreicher (1967) 2018 [188]	Chief Legal Officer, Vice President, and Secretary, T. Rowe Price Group, Inc.; Director, Vice President, and Secretary, T. Rowe Price Investment Services, Inc., T. Rowe Price Retirement Plan Services, Inc., T. Rowe Price Services, Inc., and T. Rowe Price Trust Company; Vice President and Secretary, T. Rowe Price, T. Rowe Price Hong Kong (Price Hong Kong), and T. Rowe Price International; Vice President, T. Rowe Price Japan and T. Rowe Price Singapore (Price Singapore); Principal Executive Officer and Executive Vice President, all funds
Robert W. Sharps, CFA, CPA** (1971) 2019 [188]	Director and Vice President, T. Rowe Price; Vice President, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
*Each inside director serves until retirement, resignation, or election of a successor.
**Mr. Sharps replaced Edward A. Wiese as director of the domestic fixed income Price Funds effective January 1, 2019.

OFFICERS
Name (Year of Birth) Position Held With Institutional Income Funds	Principal Occupation(s)
Colin T. Bando, CFA, 1987 Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Stephen L. Bartolini, CFA (1977) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Jason A. Bauer (1979) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Steve Boothe, CFA (1977) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Darrell N. Braman (1963) Vice President and Secretary	Vice President, Price Hong Kong, Price Singapore, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price International; Assistant Vice President, T. Rowe Price Retirement Plan Services, Inc., and T. Rowe Price Services, Inc.
Brian J. Brennan, CFA (1964) Executive Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., T. Rowe Price International, and T. Rowe Price Trust Company
Christopher P. Brown, Jr., CFA (1977) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Brian E. Burns (1960) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
M. Helena Condez (1962) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Michael J. Conelius, CFA (1964) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., T. Rowe Price International, and T. Rowe Price Trust Company
Michael F. Connelly, CFA (1977) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Michael P. Daley (1981) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Stephen M. Finamore, CPA (1976) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Stephanie A. Gentile, CFA (1956) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Justin T. Gerbereux, CFA (1975) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
John R. Gilner (1961) Chief Compliance Officer	Chief Compliance Officer and Vice President, T. Rowe Price; Vice President, T. Rowe Price Group, Inc., and T. Rowe Price Investment Services, Inc.
David R. Giroux, CFA (1975) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Gary J. Greb (1961) Vice President	Vice President, T. Rowe Price, T. Rowe Price International, and T. Rowe Trust Company
Michael J. Grogan, CFA (1971) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Keir R. Joyce, CFA (1972) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Paul J. Krug, CPA (1964) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Michael Lambe, CFA (1977) Vice President	Vice President, T. Rowe Price Group, Inc., and T. Rowe Price International
Robert M. Larkins, CFA (1973) Executive Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Matthew Lawton, CFA (1983) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Yongheon Lee (1975) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Alan D. Levenson, Ph.D. (1958) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Joseph K. Lynagh, CFA (1958) Executive Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Paul M. Massaro, CFA (1975) Executive Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Catherine D. Mathews (1963) Treasurer and Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Michael J. McGonigle (1966) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Cheryl A. Mickel, CFA (1967) Vice President	Director and Vice President, T. Rowe Price Trust Company; Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Samy B. Muaddi, CFA (1984) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Alexander S. Obaza (1981) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Miso Park, CFA (1982) Vice President	Vice President, T. Rowe Price Group, Inc., and T. Rowe Price International
John W. Ratzesberger (1975) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Shannon H. Rauser (1987) Assistant Secretary	Assistant Vice President, T. Rowe Price
Rodney M. Rayburn, CFA (1970) Executive Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Theodore E. Robson, CFA (1965) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Brian A. Rubin, CPA (1974) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Chen Shao (1980) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Jeanny Silva (1975) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Douglas D. Spratley, CFA (1969) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Kimberly A. Stokes (1969) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Ju Yen Tan (1972) Vice President	Vice President, T. Rowe Price Group, Inc., and T. Rowe Price International
Christopher J. Temple, CFA (1978) Vice President	Vice President, T. Rowe Price
Susan G. Troll, CPA (1966) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Michael J. Trivino (1981) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Mark J. Vaselkiv (1958) President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., and T. Rowe Price Trust Company
Lauren T. Wagandt (1984) Vice President	Vice President, T. Rowe Price and T. Rowe Price Group, Inc.
Megan Warren (1968) Vice President	Vice President, T. Rowe Price, T. Rowe Price Group, Inc., T. Rowe Price Retirement Plan Services, Inc., T. Rowe Price Services, Inc., and T. Rowe Price Trust Company; formerly, Executive Director, JPMorgan Chase (to 2017)
Bineesha Wickremarachchi, CFA (1980) Vice President	Vice President, T. Rowe Price Group, Inc., and T. Rowe Price International; formerly, Research Analyst, Aberdeen Asset Management (to 2015)
Rebecca Willey (1987) Assistant Vice President	Assistant Vice President, T. Rowe Price
J. Howard Woodward, CFA (1974) Vice President	Vice President, T. Rowe Price Group, Inc., and T. Rowe Price International
Unless otherwise noted, officers have been employees of T. Rowe Price or T. Rowe Price International for at least 5 years.

Item 1. (b) Notice pursuant to Rule 30e-3.

Not applicable.

Item 2. Code of Ethics.

The registrant has adopted 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. A copy of this code of ethics is filed as an exhibit to this Form N-CSR. No substantive amendments were approved or waivers were granted to this code of ethics during the period covered by this report.

Item 3. Audit Committee Financial Expert.

The registrant’s Board of Directors/Trustees has determined that Mr. Bruce W. Duncan qualifies as an audit committee financial expert, as defined in Item 3 of Form N-CSR. Mr. Duncan is considered independent for purposes of Item 3 of Form N-CSR.

Item 4. Principal Accountant Fees and Services.

(a) – (d) Aggregate fees billed for the last two fiscal years for professional services rendered to, or on behalf of, the registrant by the registrant’s principal accountant were as follows:

Audit fees include amounts related to the audit of the registrant’s annual financial statements and services normally provided by the accountant in connection with statutory and regulatory filings. Audit-related fees include amounts reasonably related to the performance of the audit of the registrant’s financial statements and specifically include the issuance of a report on internal controls and, if applicable, agreed-upon procedures related to fund acquisitions. Tax fees include amounts related to services for tax compliance, tax planning, and tax advice. The nature of these services specifically includes the review of distribution calculations and the preparation of Federal, state, and excise tax returns. All other fees include the registrant’s pro-rata share of amounts for agreed-upon procedures in conjunction with service contract approvals by the registrant’s Board of Directors/Trustees.

(e)(1) The registrant’s audit committee has adopted a policy whereby audit and non-audit services performed by the registrant’s principal accountant for the registrant, its investment adviser, and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant require pre-approval in advance at regularly scheduled audit committee meetings. If such a service is required between regularly scheduled audit committee meetings, pre-approval may be authorized by one audit committee member with ratification at the next scheduled audit committee meeting. Waiver of pre-approval for audit or non-audit services requiring fees of a de minimis amount is not permitted.

(2) No services included in (b) – (d) above were approved pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

(f) Less than 50 percent of the hours expended on the principal accountant’s engagement to audit the registrant’s financial statements for the most recent fiscal year were attributed to work performed by persons other than the principal accountant’s full-time, permanent employees.

(g) The aggregate fees billed for the most recent fiscal year and the preceding fiscal year by the registrant’s principal accountant for non-audit services rendered to the registrant, its investment adviser, and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant were $2,684,000 and $1,874,000, respectively.

(h) All non-audit services rendered in (g) above were pre-approved by the registrant’s audit committee. Accordingly, these services were considered by the registrant’s audit committee in maintaining the principal accountant’s independence.

Item 5. Audit Committee of Listed Registrants.

Not applicable.

Item 6. Investments.

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

(b) Not applicable.

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

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

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

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders.

Not applicable.

Item 11. Controls and Procedures.

(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.

Item 12. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 13. Exhibits.

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

(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 Income Funds, Inc.

		By	/s/ David Oestreicher
			David Oestreicher
			Principal Executive Officer
Date	July 19, 2019

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/ David Oestreicher
			David Oestreicher
			Principal Executive Officer
Date	July 19, 2019
		By	/s/ Catherine D. Mathews
			Catherine D. Mathews
			Principal Financial Officer
Date	July 19, 2019