PMM Putnam Managed Muni Income Trust

The fund has adopted a managed distribution policy (the “Distribution Policy”) with the goal of providing shareholders with a consistent, although not guaranteed, monthly distribution. In accordance with the Distribution Policy, the fund currently expects to make monthly distributions to common shareholders at a distribution rate per share of $0.0320. Distributions may include ordinary and/or tax-exempt income, net capital gains, and/or a return of capital of your investment in the fund. You should not draw any conclusions about the fund’s investment performance from the amount of this distribution or from the terms of the Distribution Policy. The Distribution Policy provides that the Board of Trustees may amend or terminate the Distribution Policy at any time without prior notice to fund shareholders.

Message from the Trustees

June 14, 2022

Dear Fellow Shareholder:

The year to date has been difficult for investors, with bond and stock prices falling in repeated market downturns. Inflation has climbed to levels not seen in decades, prompting the U.S. Federal Reserve to reverse the stimulus that had helped support financial assets since 2020. Markets globally also have reacted to the Russia-Ukraine War and the worsening Covid-19 pandemic in China. In the underlying economy, we have seen encouraging signs, such as abundant job openings and wage gains in the United States.

History has shown us that markets eventually recover from crises and may reward those focused on long-term goals rather than short-term uncertainties. At Putnam, professional, active investors are working for you. They are monitoring risks while looking for strong potential investments for your fund. Learn more in the interview with your fund manager(s) in the following pages.

Thank you for investing with Putnam.

Putnam Managed Municipal Income Trust has the flexibility to invest in municipal bonds issued by any U.S. state or territory. As a closed-end fund, it shares some common characteristics with open-end mutual funds, but there are some key differences that investors should understand as they consider their portfolio.

Looking at a closed-end fund’s performance

You will usually see that the NAV and the market price differ. The market price can be influenced by several factors that cause it to vary from the NAV, including fund distributions, changes in supply and demand for the fund’s shares, changing market conditions, and investor perceptions of the fund or its investment manager.

A mix of credit qualities

In addition to its flexible geographical focus, Putnam Managed Municipal Income Trust combines bonds of differing credit quality. The fund invests in high-quality bonds, but also includes an allocation to lower-rated bonds, which may offer higher income in return for more risk.

Data are historical. Past performance does not guarantee future results. More recent returns may be less or more than those shown. Investment return and net asset value will fluctuate, and you may have a gain or a loss when you sell your shares. Performance assumes reinvestment of distributions and does not account for taxes. Fund returns in the bar chart are at NAV. See below and pages 10–11 for additional performance information, including fund returns at market price. Index and Lipper results should be compared with fund performance at NAV. Fund results reflect the use of leverage, while index results are unleveraged and Lipper results reflect varying use of, and methods for, leverage.

Returns for periods of less than one year are not annualized.

All Bloomberg indices are provided by Bloomberg Index Services Limited.

Lipper peer group average is provided by Lipper, a Refinitiv company.

This comparison shows your fund’s performance in the context of broad market indexes for the six months ended 4/30/22. See above and pages 10–11 for additional fund performance information. Index descriptions can be found on page 13.

All Bloomberg indices are provided by Bloomberg Index Services Limited.

Paul, how did municipal bonds perform during the six-month period ended April 30, 2022?

Municipal bonds encountered headwinds due to fears that persistently high inflation might prompt the Federal Reserve to pare back pro-growth monetary policies faster than expected. Inflation concerns were stoked by supply chain disruptions, rising labor costs, and higher commodity prices. Geopolitical and economic uncertainties surrounding Russia’s invasion of Ukraine in late February also unnerved investors.

The Fed faces the difficult task of tamping down inflation without slowing economic growth or causing unemployment to rise. In January 2022, the Fed indicated it was on track to start a series of rate hikes in March 2022 and end its bond-buying stimulus program. The war in Ukraine and ensuing sanctions on Russia elevated commodity prices, complicating the Fed’s balancing act. This shifted expectations higher for the number and degree of interest-rate hikes.

At their March 2022 meeting, Fed policymakers raised their benchmark rate by a quarter percentage point and signaled their intent to take further measures to curb the highest inflation in 40 years. At the May 2022 meeting [shortly after the close of the fund’s reporting period], Fed

Credit qualities are shown as a percentage of the fund’s net assets (common and preferred shares) as of 4/30/22. A bond rated BBB or higher (SP-3 or higher, for short-term debt) is considered investment grade. This chart reflects the highest security rating provided by one or more of Standard & Poor’s, Moody’s, and Fitch. Ratings may vary over time.

Cash and net other assets, if any, represent the market value weights of cash, derivatives, and short-term securities in the portfolio. The fund itself has not been rated by an independent rating agency.

Top 10 state allocations are shown as a percentage of the fund’s net assets (common and preferred shares) as of 4/30/22. Investments in Puerto Rico represented 1.5% of the fund’s net assets. Summary information may differ from the portfolio schedule included in the financial statements due to the differing treatment of interest accruals, the floating-rate portion of tender option bonds, derivative securities, if any, and the use of different classifications of securities for presentation purposes. Holdings and allocations may vary over time.

officials raised their key rate by half a percentage point, the largest hike in 22 years. The Fed also announced that it would begin reducing bond holdings on its balance sheet on June 1, 2022.

These actions led to significant outflows from municipal bond funds, resulting in increasingly difficult market technicals. For the six months ended April 30, 2022, the Bloomberg Municipal Bond Index [the fund’s benchmark] returned –7.90%. Short-term municipal bonds outperformed intermediate- and long-term cohorts. From a credit perspective, investment-grade municipal bonds held up better than higher-yielding, lower-rated municipal bonds in the risk-off environment.

How did the fund perform during the reporting period?

For the six months ended April 30, 2022, the fund underperformed its benchmark, a non-leveraged index, due to our use of leveraging strategies. The fund outperformed the median fund ranked within its Lipper peer group, High Yield Municipal Debt Funds [closed-end]. [Median is the midpoint in a series of values laid out in numerical order.]

What strategies or holdings influenced the fund’s performance during the period?

With the significant sell-off in fixed income in early 2022, we believed municipal bonds had become more attractive. We extended the portfolio’s duration, a measure of the fund’s interest-rate sensitivity. At period-end, the fund’s duration was modestly long relative to the level of its Lipper peer group. We believe this positioning may help the fund outperform if the year-to-date rise in interest rates reverses course.

At period-end, the fund held an overweight exposure to bonds rated BBB and BB relative to the benchmark. From a sector- or industry-positioning perspective, we favored land-secured, continuing-care retirement communities, and charter school bonds relative to the fund’s Lipper peer group.

Regarding our strategy for state debt, the fund held an overweight exposure to Illinois relative to its Lipper peer group. We believe Illinois’s financial profile continues to stabilize, and its flexibility and credit fundamentals have improved since the onset of the Covid-19 pandemic in the United States.

The fund remained underweight in its exposure to uninsured Puerto Rico municipal debt relative to its Lipper peer group during the period. However, we narrowed the fund’s relative underweight as we believe Puerto Rico’s economy has stabilized under the supervision of the Financial Oversight and Management Board. In March 2022, Puerto Rico ended its nearly five-year bankruptcy with a plan to restructure its debt, resume payments to bond-holders, and restore its public pension system. We continue to monitor Puerto Rico debt for potential investment opportunities.

How did you use derivatives during the period?

We utilized swaps to hedge or gain exposure to interest-rate and term structure risk and to hedge or gain exposure to inflation. Additionally, we used futures for hedging Treasury term structure risk and yield curve positioning.

What is your current assessment of the health of the municipal bond market?

Municipal bonds have faced headwinds so far in 2022 as positive seasonal factors waned, fund flows turned negative, and the market adjusted to a quicker pace of monetary policy normalization. However, municipal credit fundamentals remain strong, in our view. Unprecedented fiscal support, tax revenue outperformance, and strong economic growth expectations put most state and local governments in their best financial shape for more than a decade. State

and local tax collections also were up 13.6% in 2021 compared with 2020. Finally, municipal defaults are running below long-term averages year to date through April 30, 2022, and remain isolated to the lowest-rated cohorts. As such, we believe the credit outlook is currently the most favorable factor supporting the asset class.

What is your outlook?

Higher-than-expected inflation and strong labor reports during the early months of 2022 have seemingly cemented the Fed’s pivot to a hawkish stance. The market has quickly repriced to reflect a faster pace of monetary policy normalization. In our view, the Fed is likely to continue the path of policy normalization. We believe this process could contribute to heightened market volatility but also present investors with attractive opportunities.

We expect pandemic-related supply chain pressures will begin to ease and U.S. economic activity will slow in the second half of 2022. We think the combination could contribute to slower growth and lower inflation, which could lead to a slower pace of monetary policy normalization than is currently priced in.

Although supply/demand technicals remain challenged, we believe credit fundamentals are strong and valuations are attractive. Future returns look more promising for longer-term investors, in our opinion.

Thank you, Paul, for your time and insights today.

The views expressed in this report are exclusively those of Putnam Management and are subject to change. Disclosures provide only a summary of certain changes that have occurred in the past fiscal period, which may not reflect all of the changes that have occurred since an investor purchased the fund. They are not meant as investment advice.

Please note that the holdings discussed in this report may not have been held by the fund for the entire period. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Current and future portfolio holdings are subject to risk. Statements in the Q&A concerning the fund’s performance or portfolio composition relative to those of the fund’s Lipper peer group may reference information produced by Lipper Inc. or through a third party.

This chart shows how the fund’s top weightings have changed over the past six months. Allocations are shown as a percentage of the fund’s net assets (common and preferred shares). Current period summary information may differ from the information in the portfolio schedule notes included in the financial statements due to the inclusion of derivative securities, any interest accruals, the timing of matured security transactions, the use of different classifications of securities for presentation purposes, and rounding. Holdings and allocations may vary over time.

HOW CLOSED-END FUNDS DIFFER FROM OPEN-END FUNDS

Closed-end funds and open-end funds share many common characteristics but also have some key differences that you should understand as you consider your portfolio strategies.

More assets at work Open-end funds are subject to ongoing sales and redemptions that can generate transaction costs for long-term shareholders. Closed-end funds, however, are typically fixed pools of capital that do not need to hold cash in connection with sales and redemptions, allowing the funds to keep more assets actively invested.

Traded like stocks Closed-end fund shares are traded on stock exchanges and, as a result, their prices fluctuate because of the influence of several factors.

They have a market price Like an open-end fund, a closed-end fund has a per-share net asset value (NAV). However, closed-end funds also have a “market price” for their shares — which is how much you pay when you buy shares of the fund, and how much you receive when you sell them.

When looking at a closed-end fund’s performance, you will usually see that the NAV and the market price differ. The market price can be influenced by several factors that cause it to vary from the NAV, including fund distributions, changes in supply and demand for the fund’s shares, changing market conditions, and investor perceptions of the fund or its investment manager. A fund’s performance at market price typically differs from its results at NAV.

Your fund’s performance

This section shows your fund’s performance, price, and distribution information for periods ended April 30, 2022, the end of the first half of its current fiscal year. In accordance with regulatory requirements for mutual funds, we also include performance as of the most recent calendar quarter-end. Performance should always be considered in light of a fund’s investment strategy. Data represent past performance. Past performance does not guarantee future results. More recent returns may be less or more than those shown. Investment return, net asset value, and market price will fluctuate, and you may have a gain or a loss when you sell your shares.

Annualized fund performance Total return and comparative index results for periods ended 4/30/22

Performance assumes reinvestment of distributions and does not account for taxes.

Index and Lipper results should be compared with fund performance at net asset value. Fund results reflect the use of leverage, while index results are unleveraged and Lipper results reflect varying use of, and methods for, leverage.

Returns for periods of less than one year are not annualized.

Lipper peer group average is provided by Lipper, a Refinitiv company.

All Bloomberg indices are provided by Bloomberg Index Services Limited.

^* Over the 6-month, 1-year, 3-year, 5-year, 10-year, and life-of-fund periods ended 4/30/22, there were 16, 13, 12, 11, 11, and 6 funds, respectively, in this Lipper category.

Performance includes the deduction of management fees and administrative expenses.

Fund price and distribution information For the six-month period ended 4/30/22

The classification of distributions, if any, is an estimate. Final distribution information will appear on your year-end tax forms.

¹ For some investors, investment income may be subject to the federal alternative minimum tax. Income from federally exempt funds may be subject to state and local taxes.

² Capital gains, if any, are taxable for federal and, in most cases, state purposes.

³ Most recent distribution, including any return of capital and excluding capital gains, annualized and divided by NAV or market price at end of period.

⁴ Assumes maximum 40.80% federal tax rate for 2022. Results for investors subject to lower tax rates would not be as advantageous.

Fund performance as of most recent calendar quarter Total return for periods ended 3/31/22

See the discussion following the fund performance table on page 10 for information about the calculation of fund performance.

Consider these risks before investing

Lower-rated bonds may offer higher yields in return for more risk. Bond investments are subject to interest-rate risk (the risk of bond prices falling if interest rates rise) and credit risk (the risk of an issuer defaulting on interest or principal payments). Interest-rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade bonds. Unlike bonds, funds that invest in bonds have fees and expenses.

The value of investments in the fund’s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political, or financial market conditions; investor sentiment and market perceptions; government actions; geopolitical events or changes; and factors related to a specific issuer, geography, industry, or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. The fund’s shares trade on a stock exchange at market prices, which may be lower than the fund’s net asset value.

Our investment techniques, analyses, and judgments may not produce the outcome we intend. The investments we select for the fund may not perform as well as other securities that we do not select for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could have a negative effect on the fund. You can lose money by investing in the fund.

Terms and definitions

Important terms

Total return shows how the value of the fund’s shares changed over time, assuming you held the shares through the entire period and reinvested all distributions in the fund.

Net asset value (NAV) is the value of all your fund’s assets, minus any liabilities, divided by the number of outstanding shares.

Market price is the current trading price of one share of the fund. Market prices are set by transactions between buyers and sellers on exchanges such as the New York Stock Exchange.

Fixed income terms

Current rate is the annual rate of return earned from dividends or interest of an investment. Current rate is expressed as a percentage of the price of a security, fund share, or principal investment.

Yield curve is a graph that plots the yields of bonds with equal credit quality against their differing maturity dates, ranging from shortest to longest. It is used as a benchmark for other debt, such as mortgage or bank lending rates.

Comparative indexes

Bloomberg Municipal Bond Index is an unmanaged index of long-term, fixed-rate, investment-grade tax-exempt bonds.

Bloomberg U.S. Aggregate Bond Index is an unmanaged index of U.S. investment-grade fixed-income securities.

ICE BofA (Intercontinental Exchange Bank of America) U.S. 3-Month Treasury Bill Index is an unmanaged index that seeks to measure the performance of U.S. Treasury bills available in the marketplace.

S&P 500^® Index is an unmanaged index of common stock performance.

Indexes assume reinvestment of all distributions and do not account for fees. Securities and performance of a fund and an index will differ. You cannot invest directly in an index.

BLOOMBERG^®  is a trademark and service mark of Bloomberg Finance L.P. and its affiliates (collectively “Bloomberg”). Bloomberg or Bloomberg’s licensors own all proprietary rights in the Bloomberg Indices. Neither Bloomberg nor Bloomberg’s licensors approve or endorse this material, or guarantee the accuracy or completeness of any information herein, or make any warranty, express or implied, as to the results to be obtained therefrom, and to the maximum extent allowed by law, neither shall have any liability or responsibility for injury or damages arising in connection therewith.

ICE BofA permits use of the ICE BofA indices and related data on an “as is” basis; makes no warranties regarding same; does not guarantee the suitability, quality, accuracy, timeliness, and/or completeness of the ICE BofA indices or any data included in, related to, or derived therefrom; assumes no liability in connection with the use of the foregoing; and does not sponsor, endorse, or recommend Putnam Investments, or any of its products or services.

Lipper, a Refinitiv company, is a third-party industry-ranking entity that ranks mutual funds. Its rankings do not reflect sales charges. Lipper rankings are based on total return at net asset value relative to other funds that have similar current investment styles or objectives as determined by Lipper. Lipper may change a fund’s category assignment at its discretion. Lipper category averages reflect performance trends for funds within a category.

Other information for shareholders

Important notice regarding share repurchase program

In September 2021, the Trustees of your fund approved the renewal of a share repurchase program that had been in effect since 2005. This renewal allows your fund to repurchase, in the 365 days beginning October 1, 2021, up to 10% of the fund’s common shares outstanding as of September 30, 2021.

Important notice regarding delivery of shareholder documents

In accordance with Securities and Exchange Commission (SEC) regulations, Putnam sends a single notice of internet availability, or a single printed copy, of annual and semiannual shareholder reports, prospectuses, and proxy statements to Putnam shareholders who share the same address, unless a shareholder requests otherwise. If you prefer to receive your own copy of these documents, please call Putnam at 1-800-225-1581, and Putnam will begin sending individual copies within 30 days.

Proxy voting

Putnam is committed to managing our mutual funds in the best interests of our shareholders. The Putnam funds’ proxy voting guidelines and procedures, as well as information regarding how your fund voted proxies relating to portfolio securities during the 12-month period ended June 30, 2021, are available in the Individual Investors section of putnam.com and on the SEC’s website, www.sec.gov. If you have questions about finding forms on the SEC’s website, you may call the SEC at 1-800-SEC-0330. You may also obtain the Putnam funds’ proxy voting guidelines and procedures at no charge by calling Putnam’s Shareholder Services at 1-800-225-1581.

Fund portfolio holdings

The fund will file a complete schedule of its portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT within 60 days of the end of such fiscal quarter. Shareholders may obtain the fund’s Form N-PORT on the SEC’s website at www.sec.gov.

Prior to its use of Form N-PORT, the fund filed its complete schedule of its portfolio holdings with the SEC on Form N-Q, which is available online at www.sec.gov.

Trustee and employee fund ownership

Putnam employees and members of the Board of Trustees place their faith, confidence, and, most importantly, investment dollars in Putnam mutual funds. As of April 30, 2022, Putnam employees had approximately $492,000,000 and the Trustees had approximately $72,000,000 invested in Putnam mutual funds. These amounts include investments by the Trustees’ and employees’ immediate family members as well as investments through retirement and deferred compensation plans.

Summary of Putnam closed-end funds’ amended and restated dividend reinvestment plans

Putnam Managed Municipal Income Trust, Putnam Master Intermediate Income Trust, Putnam Municipal Opportunities Trust and Putnam Premier Income Trust (each, a “Fund” and collectively, the “Funds”) each offer a dividend reinvestment plan (each, a “Plan” and collectively, the “Plans”). If you participate in a Plan, all income dividends and capital gain distributions are automatically reinvested in Fund shares by the Fund’s agent, Putnam Investor Services, Inc. (the “Agent”). If you are not participating in a Plan, every month you will receive all dividends and other distributions in cash, paid by check and mailed directly to you.

Upon a purchase (or, where applicable, upon registration of transfer on the shareholder records of a Fund) of shares of a Fund by a registered shareholder, each such shareholder will be deemed to have elected to participate in that Fund’s Plan. Each such shareholder will have all distributions by a Fund automatically reinvested in additional shares, unless such shareholder elects to terminate participation in a Plan by instructing the Agent to pay future distributions in cash. Shareholders who were not participants in a Plan as of January 31, 2010, will continue to receive distributions in cash but may enroll in a Plan at any time by contacting the Agent.

If you participate in a Fund’s Plan, the Agent will automatically reinvest subsequent distributions, and the Agent will send you a confirmation in the mail telling you how many additional shares were issued to your account.

To change your enrollment status or to request additional information about the Plans, you may contact the Agent either in writing, at P.O. Box 8383, Boston, MA 02266-8383, or by telephone at 1-800-225-1581 during normal East Coast business hours.

How you acquire additional shares through a Plan If the market price per share for your Fund’s shares (plus estimated brokerage commissions) is greater than or equal to their net asset value per share on the payment date for a distribution, you will be issued shares of the Fund at a value equal to the higher of the net asset value per share on that date or 95% of the market price per share on that date.

If the market price per share for your Fund’s shares (plus estimated brokerage commissions) is less than their net asset value per share on the payment date for a distribution, the Agent will buy Fund shares for participating accounts in the open market. The Agent will aggregate open-market purchases on behalf of all participants, and the average price (including brokerage commissions) of all shares purchased by the Agent will be the price per share allocable to each participant. The Agent will generally complete these open-market purchases within five business days following the payment date. If, before the Agent has completed open-market purchases, the market price per share (plus estimated brokerage commissions) rises to exceed the net asset value per share on the payment date, then the purchase price may exceed the net asset value per share, potentially resulting in the acquisition of fewer shares than if the distribution had been paid in newly issued shares.

How to withdraw from a Plan Participants may withdraw from a Fund’s Plan at any time by notifying the Agent, either in writing or by telephone. Such withdrawal will be effective immediately if notice is received by the Agent with sufficient time prior to any distribution record date; otherwise, such withdrawal will be effective with respect to any subsequent distribution following notice of withdrawal. There is no penalty for withdrawing from or not participating in a Plan.

Plan administration The Agent will credit all shares acquired for a participant under a Plan to the account in which the participant’s common shares are held. Each participant will

be sent reasonably promptly a confirmation by the Agent of each acquisition made for his or her account.

About brokerage fees Each participant pays a proportionate share of any brokerage commissions incurred if the Agent purchases additional shares on the open market, in accordance with the Plans. There are no brokerage charges applied to shares issued directly by the Funds under the Plans.

About taxes and Plan amendments Reinvesting dividend and capital gain distributions in shares of the Funds does not relieve you of tax obligations, which are the same as if you had received cash distributions. The Agent supplies tax information to you and to the IRS annually. Each Fund reserves the right to amend or terminate its Plan upon 30 days’ written notice. However, the Agent may assign its rights, and delegate its duties, to a successor agent with the prior consent of a Fund and without prior notice to Plan participants.

If your shares are held in a broker or nominee name If your shares are held in the name of a broker or nominee offering a dividend reinvestment service, consult your broker or nominee to ensure that an appropriate election is made on your behalf. If the broker or nominee holding your shares does not provide a reinvestment service, you may need to register your shares in your own name in order to participate in a Plan.

In the case of record shareholders such as banks, brokers or nominees that hold shares for others who are the beneficial owners of such shares, the Agent will administer the Plan on the basis of the number of shares certified by the record shareholder as representing the total amount registered in such shareholder’s name and held for the account of beneficial owners who are to participate in the Plan.

Financial statements

These sections of the report, as well as the accompanying Notes, constitute the fund’s financial statements.

The fund’s portfolio lists all the fund’s investments and their values as of the last day of the reporting period. Holdings are organized by asset type and industry sector, country, or state to show areas of concentration and diversification.

Statement of assets and liabilities shows how the fund’s net assets and share price are determined. All investment and non-investment assets are added together. Any unpaid expenses and other liabilities are subtracted from this total. The result is divided by the number of shares to determine the net asset value per share. (For funds with preferred shares, the amount subtracted from total assets includes the liquidation preference of preferred shares.)

Statement of operations shows the fund’s net investment gain or loss. This is done by first adding up all the fund’s earnings — from dividends and interest income — and subtracting its operating expenses to determine net investment income (or loss). Then, any net gain or loss the fund realized on the sales of its holdings — as well as any unrealized gains or losses over the period — is added to or subtracted from the net investment result to determine the fund’s net gain or loss for the fiscal period.

Statement of changes in net assets shows how the fund’s net assets were affected by the fund’s net investment gain or loss, by distributions to shareholders, and by changes in the number of the fund’s shares. It lists distributions and their sources (net investment income or realized capital gains) over the current reporting period and the most recent fiscal year-end. The distributions listed here may not match the sources listed in the Statement of operations because the distributions are determined on a tax basis and may be paid in a different period from the one in which they were earned. Dividend sources are estimated at the time of declaration. Actual results may vary. Any non-taxable return of capital cannot be determined until final tax calculations are completed after the end of the fund’s fiscal period.

Statement of cash flows shows changes in the fund’s cash balance during the period as results of cash flows from operating and financing activities.

Financial highlights provide an overview of the fund’s investment results, per-share distributions, expense ratios, net investment income ratios, and portfolio turnover in one summary table, reflecting the five most recent reporting periods. In a semiannual report, the highlights table also includes the current reporting period.

Key to holding’s abbreviations