a_convertsecurities.htm

Putnam
Convertible Securities
Fund

Annual report
10 | 31 | 17


Message from the Trustees	1
About the fund	2
Interview with your fund’s portfolio managers	4
Your fund’s performance	9
Your fund’s expenses	12
Terms and definitions	14
Other information for shareholders	16
Important notice regarding Putnam’s privacy policy	17
Trustee approval of management contract	18
Financial statements	22
Federal tax information	48
About the Trustees	49
Officers	51

Consider these risks before investing: Convertible securities’ prices may fall or fail to rise over time for several reasons, including general financial market conditions, changing market perceptions (including perceptions about the risk of default and expectations about monetary policy or interest rates), changes in government intervention in the financial markets, and factors related to a specific issuer or industry. These and other factors may lead to increased volatility and reduced liquidity in the fund’s portfolio holdings. These risks are generally greater for convertible securities issued by small and/or midsize companies. Convertible securities’ prices may be adversely affected by underlying common stock price changes. While convertible securities tend to provide higher yields than common stocks, the higher yield may not protect against the risk of loss or mitigate any loss associated with a convertible security’s price decline. Convertible securities are subject to credit risk, which is the risk that an issuer of the fund’s investments may default on payment of interest or principal. Credit risk is greater for below-investment-grade convertible securities. Convertible securities may be less sensitive to interest-rate changes than non-convertible bonds because of their structural features (e.g., convertibility, “put” features). Interest-rate risk is generally greater, however, for longer-term bonds and convertible securities whose underlying stock price has fallen significantly below the conversion price. You can lose money by investing in the fund.

Message from the Trustees

December 13, 2017

Dear Fellow Shareholder:

A fair amount of investor optimism has helped keep financial markets on a steady course throughout 2017. Global stock markets have generally made solid advances with low volatility, while bond market performance has been a bit more uneven. As we look ahead to the new year, it is important to note that a number of macroeconomic and geopolitical risks around the world could disrupt market momentum.

In all market environments, we believe investors should remain focused on time-tested strategies: maintain a well-diversified portfolio, think about long-term goals, and speak regularly with your financial advisor. In the following pages, you will find an overview of your fund’s performance for the reporting period as well as an outlook for the coming months.

We would like to take this opportunity to recognize and thank Robert J. Darretta, John A. Hill, and W. Thomas Stephens, who recently retired from your fund’s Board of Trustees. We are grateful for their years of work on behalf of you and your fellow shareholders, and we wish them well in their future endeavors.

Thank you for investing with Putnam.

Current performance may be lower or higher than the quoted past performance, which cannot guarantee future results. Share price, principal value, and return will fluctuate, and you may have a gain or a loss when you sell your shares. Performance of class A shares assumes reinvestment of distributions and does not account for taxes. Fund returns in the bar chart do not reflect a sales charge of 5.75%; had they, returns would have been lower. See below and pages 9–12 for additional performance information. For a portion of the periods, the fund had expense limitations, without which returns would have been lower. To obtain the most recent month-end performance, visit putnam.com.

* The fund’s benchmark, the ICE BofAML U.S. Convertible Index, was introduced on 12/31/87, which post-dates the inception of the fund’s class A shares.

This comparison shows your fund’s performance in the context of broad market indexes for the 12 months ended 10/31/17. See above and pages 9–12 for additional fund performance information. Index descriptions can be found on page 14.

Convertible Securities Fund 3

Eric has an M.B.A. from the Booth School of Business, University of Chicago, and a B.S. from San Diego State University. He joined Putnam in 2000 and has been in the investment industry since 1994.

Rob has an M.B.A. from the Booth School of Business, University of Chicago, and a B.S. from The Wharton School, University of Pennsylvania. He joined Putnam in 2000 and has been in the investment industry since 1986.

Anthony J. Daigle
Assistant Portfolio Manager
(Photo not available.)

Anthony has a B.S. in International Business from Merrimack College. He has been in the investment industry since he joined Putnam in 2004.

What was the market environment like for U.S. convertible securities during the reporting period?

ROB The surprising results of the 2016 presidential election proved to be an inflection point for the stock market, despite uncertainty around the effects of President Trump’s policies on the U.S. economy. Speculation that Trump and a Republican-controlled Congress would pursue pro-growth policies, including lower taxes, greater infrastructure spending, and less regulation, increased investor optimism about U.S. growth.

The U.S. economy did see steady improvement during the period. The unemployment rate fell to its lowest level in 16 years and gross domestic product unexpectedly maintained a brisk 3.0% pace of growth in the third quarter of 2017, after rising 3.1% in the second quarter. Despite waning optimism about the ability of Congress and the White House to pass pro-growth policies and amid tensions with North Korea, major equity benchmarks set record highs by period-end. Given their strong correlation with equities, convertibles benefited from the rally — capturing much of the rise in stock prices.

Despite the Federal Reserve’s three interest-rate increases in December 2016, March 2017, and June 2017, rates remained in historically low territory. At the close of the reporting period, the Fed’s benchmark federal funds target rate

4 Convertible Securities Fund

was set in the range of 1.00% to 1.25%, up from 0.25% to 0.50% a year earlier. With the return for the broader U.S. fixed-income markets and Treasuries below 1.0% for the period, having an exposure to the stock market was advantageous for performance results.

How did Putnam Convertible Securities Fund perform?

ANTHONY For the 12 months ended October 31, 2017, the fund delivered positive performance that outperformed the ICE BofAML U.S. Convertible Index [the benchmark] and the average return of funds in its Lipper peer group. On an absolute and a benchmark-relative basis, effective security selection within communication services was the top contributor, particularly an underweight exposure to Frontier Communications. Overweight positioning in technology, along with overweight positioning and security selection in consumer cyclicals, also added to relative performance.

Security selection within health care was the largest relative detractor at the sector level, mostly due to an out-of-benchmark position in Teva Pharmaceuticals. Underweight exposure and security selection within basic materials, along with underweight exposure in utilities, also detracted from performance.

Could you discuss some of the holdings that were notable contributors?

ROB ARIAD Pharmaceuticals, which was an overweight position relative to the fund’s benchmark, was a top contributor to results. ARIAD, which specializes in oncology, was acquired by Takeda Pharmaceutical. The $5.2 billion takeover agreement with Takeda was well received by investors, and the stock soared following the acquisition announcement. We sold the fund’s position in ARIAD after the announcement to lock in gains.

An out-of-benchmark position in Mandatory Exchangeable Trust, which is a repository for the China-based Alibaba Group Holdings, also contributed to relative results. As the largest global e-commerce company, Alibaba’s growth accelerated in 2017, and it is well positioned in areas such as cloud computing, which we view as a significant driver of future growth.

Additionally, within the technology sector, an overweight position in a security issued by Lam Research added to returns. The large-cap semiconductor equipment and service company benefited from robust end markets for the company’s NAND and FRAM microchips.

What were some holdings that detracted from returns during the period?

ANTHONY The top detractor from performance was our decision to avoid Take-Two Interactive Software, a large-cap technology company that produces entertainment video games. Strong demand for a few titles and an increased shift to online versus physical sales led to improved profitability for the company. We chose not to hold this company in the portfolio since it has been highly dependent on blockbuster-type games.

Biotechnology and pharmaceutical companies underperformed other health-care stocks as well as the broader market early in the period. Pricing drew more attention as candidates in the U.S. presidential election focused on prescription drug affordability. Conditions generally improved later in the period, but the fund’s second-largest detractor, Teva Pharmaceutical Industries, continued to struggle due to competitive pressures on its generic drug portfolio and high levels of debt on its balance sheet. The relative

6 Convertible Securities Fund

degree of underperformance was magnified by the fact that the stock was not held in the benchmark. Based on our view of deteriorating fundamentals, we sold the holding prior to period-end.

With its oncology focus, Incyte was a strong performer for the period. However, our decision to limit the fund’s exposure to this large-cap pharmaceutical stock weighed on results relative to the benchmark. The stock soared on news that Incyte would collaborate with Merck on a clinical development program to test the combination of their two cancer drugs. The fund’s small position was sold during the period after the announcement.

What is your outlook as 2017 comes to a close?

ROB A series of initiatives and appointments emanating from Washington, coupled with a strong corporate earnings season, helped to drive equity and credit markets higher during the period. The proposed U.S. tax overhaul framework includes a reduction of the corporate tax rate, a lower repatriation tax rate, full expansions of capital expenditures, and capping of interest deductibility. On balance, we believe these changes could be positive for convertible issuers.

In addition, we believe President Trump’s nomination of Jerome Powell to be the next Chair of the Federal Reserve likely preserves continuity, as Powell’s stated economic and monetary policy views largely mirror those of the current leadership. Furthermore, with nearly 97% of S&P 500 companies reporting earnings for the third quarter of 2017, 70% of those companies have surpassed bottom-line estimates. Revenue and earnings per share growth for 2017 are on pace to increase 5.5% and 10%, respectively, compared with 2016.

U.S. convertibles have performed well in the past 12 months, with notable outperformance relative to the Bloomberg Barclays U.S. Aggregate Bond Index. In addition, convertibles have witnessed a healthy new-issue market with approximately $34 billion in supply coming to market on a year-to-date basis through October 31, 2017. Increased supply has

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. Current period summary information may differ from the portfolio schedule included in the financial statements due to the inclusion of derivative securities, any interest accruals, the exclusion of as-of trades, if any, the use of different classifications of securities for presentation purposes, and rounding. Holdings and allocations may vary over time.

Convertible Securities Fund 7

expanded the universe of investment options in the U.S. convertibles market, amounting to attractive associated return opportunities, in our view. We expect this robust environment for new issues to continue in the face of record equity index levels and rising interest rates.

Ultimately, with central banks beginning the process of normalizing monetary policy and stock valuations at elevated levels, we believe convertible securities continue to be an attractive option for investors whose investment objectives may include current income and capital appreciation, while also providing the potential for lower portfolio volatility.

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

The views expressed in this report are exclusively those of Putnam Management and are subject to change. 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.

8 Convertible Securities Fund

Your fund’s performance

This section shows your fund’s performance, price, and distribution information for periods ended October 31, 2017, the end of its most recent fiscal year. In accordance with regulatory requirements for mutual funds, we also include performance information as of the most recent calendar quarter-end and expense information taken from the fund’s current prospectus. 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 and principal value will fluctuate, and you may have a gain or a loss when you sell your shares. Performance information does not reflect any deduction for taxes a shareholder may owe on fund distributions or on the redemption of fund shares. For the most recent month-end performance, please visit the Individual Investors section at putnam.com or call Putnam at 1-800-225-1581. Class I, R, and Y shares are not available to all investors. See the Terms and Definitions section in this report for definitions of the share classes offered by your fund.

Fund performance Total return for periods ended 10/31/17


	Annual
	average		Annual		Annual		Annual
	(life of fund)	10 years	average	5 years	average	3 years	average	1 year
Class A (6/29/72)
Before sales charge	9.78%	75.43%	5.78%	58.02%	9.58%	17.92%	5.65%	18.44%
After sales charge	9.63	65.34	5.16	48.93	8.29	11.14	3.58	11.63
Class B (7/15/93)
Before CDSC	9.58	65.25	5.15	52.21	8.76	15.34	4.87	17.56
After CDSC	9.58	65.25	5.15	50.21	8.48	12.34	3.95	12.56
Class C (7/26/99)
Before CDSC	8.95	62.72	4.99	52.17	8.76	15.31	4.86	17.52
After CDSC	8.95	62.72	4.99	52.17	8.76	15.31	4.86	16.52
Class I (3/3/15)
Net asset value	9.90	80.58	6.09	60.66	9.95	19.28	6.05	18.93
Class M (3/13/95)
Before sales charge	9.12	66.88	5.25	54.15	9.04	16.20	5.13	17.88
After sales charge	9.04	61.04	4.88	48.76	8.27	12.13	3.89	13.76
Class R (12/1/03)
Net asset value	9.50	71.12	5.52	56.04	9.31	17.02	5.38	18.15
Class Y (12/30/98)
Net asset value	9.89	79.91	6.05	60.06	9.86	18.84	5.92	18.76

Current performance may be lower or higher than the quoted past performance, which cannot guarantee future results. After-sales-charge returns for class A and M shares reflect the deduction of the maximum 5.75% and 3.50% sales charge, respectively, levied at the time of purchase. Class B share returns after contingent deferred sales charge (CDSC) reflect the applicable CDSC, which is 5% in the first year, declining over time to 1% in the sixth year, and is eliminated thereafter. Class C share returns after CDSC reflect a 1% CDSC for the first year that is eliminated thereafter. Class I, R, and Y shares have no initial sales charge or CDSC. Performance for class B, C, M, R, and Y shares before their inception is derived from the historical performance of class A shares, adjusted for the applicable sales charge (or CDSC) and the higher operating expenses for such shares, except for class Y shares, for which 12b-1 fees are not applicable. Performance for class I shares prior to their inception is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class I shares; had it, returns would have been higher.

For a portion of the periods, the fund had expense limitations, without which returns would have been lower.

Class B share performance reflects conversion to class A shares after eight years.

Convertible Securities Fund 9

Comparative index returns For periods ended 10/31/17


	Annual
	average		Annual		Annual		Annual
	(life of fund)	10 years	average	5 years	average	3 years	average	1 year
ICE BofAML U.S.
Convertible Index	—^†	93.01%	6.80%	71.67%	11.41%	22.06%	6.87%	18.13%
Lipper Convertible
Securities Funds category	9.77%	67.53	5.27	56.06	9.27	16.81	5.29	16.34
average^*

Index and Lipper results should be compared with fund performance before sales charge, before CDSC, or at net asset value.

^*Over the 1-year, 3-year, 5-year, 10-year, and life-of-fund periods ended 10/31/17, there were 84, 67, 62, 38, and 1 fund(s), respectively, in this Lipper category.

^†The fund’s benchmark, the ICE BofAML U.S. Convertible Index, was introduced on 12/31/87, which post-dates the inception of the fund’s class A shares.

Past performance does not indicate future results. At the end of the same time period, a $10,000 investment in the fund’s class B and C shares would have been valued at $16,525 and $16,272, respectively, and no contingent deferred sales charges would apply. A $10,000 investment in the fund’s class M shares ($9,650 after sales charge) would have been valued at $16,104. A $10,000 investment in the fund’s class I, R, and Y shares would have been valued at $18,058, $17,112, and $17,991, respectively.

10 Convertible Securities Fund

Fund price and distribution information For the 12-month period ended 10/31/17


Distributions	Class A		Class B	Class C	Class I	Class M		Class R	Class Y
Number	4		4	4	4	4		4	4
Income	$0.480		$0.298	$0.293	$0.572	$0.361		$0.420	$0.543
Capital gains	—		—	—	—	—		—	—
Total	$0.480		$0.298	$0.293	$0.572	0.361		$0.420	$0.543
	Before	After	Net	Net	Net	Before	After	Net	Net
	sales	sales	asset	asset	asset	sales	sales	asset	asset
Share value	charge	charge	value	value	value	charge	charge	value	value
10/31/16	$22.55	$23.93	$22.10	$22.29	$22.55	$22.31	$23.12	$22.45	$22.54
10/31/17	26.19	27.79	25.66	25.88	26.20	25.91	26.85	26.07	26.18
	Before	After	Net	Net	Net	Before	After	Net	Net
Current rate	sales	sales	asset	asset	asset	sales	sales	asset	asset
(end of period)	charge	charge	value	value	value	charge	charge	value	value
Current dividend
rate¹	1.83%	1.73%	1.14%	1.11%	2.20%	1.37%	1.33%	1.61%	2.08%
Current 30-day
SEC yield²	N/A	0.83	0.15	0.15	1.29	N/A	0.38	0.64	1.13

The classification of distributions, if any, is an estimate. Before-sales-charge share value and current dividend rate for class A and M shares, if applicable, do not take into account any sales charge levied at the time of purchase. After-sales-charge share value, current dividend rate, and current 30-day SEC yield, if applicable, are calculated assuming that the maximum sales charge (5.75% for class A shares and 3.50% for class M shares) was levied at the time of purchase. Final distribution information will appear on your year-end tax forms.

¹Most recent distribution, including any return of capital and excluding capital gains, annualized and divided by NAV or market price at end of period.

²Based only on investment income and calculated using the maximum offering price for each share class, in accordance with SEC guidelines.

Convertible Securities Fund 11

Fund performance as of most recent calendar quarter Total return for periods ended 9/30/17


	Annual
	average		Annual		Annual		Annual
	(life of fund)	10 years	average	5 years	average	3 years	average	1 year
Class A (6/29/72)
Before sales charge	9.75%	74.91%	5.75%	54.81%	9.13%	16.81%	5.32%	13.92%
After sales charge	9.61	64.86	5.13	45.90	7.85	10.09	3.26	7.37
Class B (7/15/93)
Before CDSC	9.55	64.69	5.12	49.09	8.32	14.18	4.52	13.07
After CDSC	9.55	64.69	5.12	47.09	8.02	11.18	3.60	8.07
Class C (7/26/99)
Before CDSC	8.93	62.26	4.96	49.14	8.32	14.25	4.54	13.12
After CDSC	8.93	62.26	4.96	49.14	8.32	14.25	4.54	12.12
Class I (3/3/15)
Net asset value	9.87	79.98	6.05	57.33	9.49	18.11	5.71	14.40
Class M (3/13/95)
Before sales charge	9.09	66.43	5.23	51.02	8.59	15.09	4.80	13.37
After sales charge	9.01	60.61	4.85	45.74	7.82	11.07	3.56	9.41
Class R (12/1/03)
Net asset value	9.48	70.60	5.49	52.91	8.86	15.96	5.06	13.66
Class Y (12/30/98)
Net asset value	9.86	79.38	6.02	56.80	9.41	17.72	5.59	14.27

See the discussion following the fund performance table on page 9 for information about the calculation of fund performance.

Your fund’s expenses

As a mutual fund investor, you pay ongoing expenses, such as management fees, distribution fees (12b-1 fees), and other expenses. Using the following information, you can estimate how these expenses affect your investment and compare them with the expenses of other funds. You may also pay one-time transaction expenses, including sales charges (loads) and redemption fees, which are not shown in this section and would have resulted in higher total expenses. For more information, see your fund’s prospectus or talk to your financial representative.

Expense ratios


	Class A	Class B	Class C	Class I	Class M	Class R	Class Y
Total annual operating expenses for the
fiscal year ended 10/31/16	1.09%^*	1.84%^*	1.84%^*	0.69%	1.59%^*	1.34%^*	0.84%^*
Annualized expense ratio for the
six-month period ended 10/31/17^†	1.06%	1.81%	1.81%	0.69%	1.56%	1.31%	0.81%

Fiscal-year expense information in this table is taken from the most recent prospectus, is subject to change, and may differ from that shown for the annualized expense ratio and in the financial highlights of this report.

Expenses are shown as a percentage of average net assets.

^*Restated to reflect current fees resulting from a change to the fund’s investor servicing arrangements effective 9/1/16.

^†Expense ratios for each class are for the fund’s most recent fiscal half year. As a result of this, ratios may differ from expense ratios based on one-year data in the financial highlights.

12 Convertible Securities Fund

Expenses per $1,000

The following table shows the expenses you would have paid on a $1,000 investment in each class of the fund from 5/1/17 to 10/31/17. It also shows how much a $1,000 investment would be worth at the close of the period, assuming actual returns and expenses.


	Class A	Class B	Class C	Class I	Class M	Class R	Class Y
Expenses paid per $1,000^*†	$5.56	$9.47	$9.47	$3.62	$8.17	$6.86	$4.25
Ending value (after expenses)	$1,079.20	$1,075.50	$1,075.10	$1,081.60	$1,076.90	$1,078.20	$1,081.00

^*Expenses for each share class are calculated using the fund’s annualized expense ratio for each class, which represents the ongoing expenses as a percentage of average net assets for the six months ended 10/31/17. The expense ratio may differ for each share class.

^†Expenses are calculated by multiplying the expense ratio by the average account value for the period; then multiplying the result by the number of days in the period; and then dividing that result by the number of days in the year.

Estimate the expenses you paid

To estimate the ongoing expenses you paid for the six months ended 10/31/17, use the following calculation method. To find the value of your investment on 5/1/17, call Putnam at 1-800-225-1581.

Compare expenses using the SEC’s method

The Securities and Exchange Commission (SEC) has established guidelines to help investors assess fund expenses. Per these guidelines, the following table shows your fund’s expenses based on a $1,000 investment, assuming a hypothetical 5% annualized return. You can use this information to compare the ongoing expenses (but not transaction expenses or total costs) of investing in the fund with those of other funds. All mutual fund shareholder reports will provide this information to help you make this comparison. Please note that you cannot use this information to estimate your actual ending account balance and expenses paid during the period.


	Class A	Class B	Class C	Class I	Class M	Class R	Class Y
Expenses paid per $1,000^*†	$5.40	$9.20	$9.20	$3.52	$7.93	$6.67	$4.13
Ending value (after expenses)	$1,019.86	$1,016.08	$1,016.08	$1,021.73	$1,017.34	$1,018.60	$1,021.12

^†Expenses are calculated by multiplying the expense ratio by the average account value for the six-month period; then multiplying the result by the number of days in the six-month period; and then dividing that result by the number of days in the year.

Convertible Securities Fund 13

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.

Before sales charge, or net asset value, is the price, or value, of one share of a mutual fund, without a sales charge. Before-sales-charge figures fluctuate with market conditions, and are calculated by dividing the net assets of each class of shares by the number of outstanding shares in the class.

After sales charge is the price of a mutual fund share plus the maximum sales charge levied at the time of purchase. After-sales-charge performance figures shown here assume the 5.75% maximum sales charge for class A shares and 3.50% for class M shares.

Contingent deferred sales charge (CDSC) is generally a charge applied at the time of the redemption of class B or C shares and assumes redemption at the end of the period. Your fund’s class B CDSC declines over time from a 5% maximum during the first year to 1% during the sixth year. After the sixth year, the CDSC no longer applies. The CDSC for class C shares is 1% for one year after purchase.

Share classes

Class A shares are generally subject to an initial sales charge and no CDSC (except on certain redemptions of shares bought without an initial sales charge).

Class B shares are closed to new investments and are only available by exchange from another Putnam fund or through dividend and/or capital gains reinvestment. They are not subject to an initial sales charge and may be subject to a CDSC.

Class C shares are not subject to an initial sales charge and are subject to a CDSC only if the shares are redeemed during the first year.

Class I shares are not subject to an initial sales charge or CDSC, and carry no 12b-1 fee. They are only available to institutional clients and other investors who meet minimum investment requirements.

Class M shares have a lower initial sales charge and a higher 12b-1 fee than class A shares and no CDSC.

Class R shares are not subject to an initial sales charge or CDSC and are available only to employer-sponsored retirement plans.

Class Y shares are not subject to an initial sales charge or CDSC, and carry no 12b-1 fee. They are generally only available to corporate and institutional clients and clients in other approved programs.

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.

Mortgage-backed security (MBS), also known as a mortgage “pass-through,” is a type of asset-backed security that is secured by a mortgage or collection of mortgages. The following are types of MBSs:

• Agency “pass-through” has its principal and interest backed by a U.S. government agency, such as the Federal National Mortgage Association (Fannie Mae), Government National Mortgage Association (Ginnie Mae), and Federal Home Loan Mortgage Corporation (Freddie Mac).

• Collateralized mortgage obligation (CMO) represents claims to specific cash flows from pools of home mortgages. The streams of principal and interest payments on the mortgages are distributed to the different classes of CMO interests in “tranches.” Each tranche may have different principal balances, coupon rates,

14 Convertible Securities Fund

prepayment risks, and maturity dates. A CMO is highly sensitive to changes in interest rates and any resulting change in the rate at which homeowners sell their properties, refinance, or otherwise prepay loans. CMOs are subject to prepayment, market, and liquidity risks.

• Interest-only (IO) security is a type of CMO in which the underlying asset is the interest portion of mortgage, Treasury, or bond payments.

• Non-agency residential mortgage-backed security (RMBS) is an MBS not backed by Fannie Mae, Ginnie Mae, or Freddie Mac. One type of RMBS is an Alt-A mortgage-backed security.

• Commercial mortgage-backed security (CMBS) is secured by the loan on a commercial property.

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

ICE BofAML 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.

ICE BofAML U.S. Convertible Index is an unmanaged index of high-yield U.S. convertible securities.

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

Frank Russell Company is the source and owner of the trademarks, service marks, and copyrights related to the Russell Indexes. Russell^® is a trademark of Frank Russell Company.

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.

ICE Data Indices, LLC (“ICE BofAML”), used with permission. ICE BofAML permits use of the ICE BofAML 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 BofAML 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 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.

Convertible Securities Fund 15

Other information for shareholders

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, 2017, are available in the Individual Investors section of putnam.com, and on the Securities and Exchange Commission (SEC) 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-Q. Shareholders may obtain the fund’s Form N-Q on the SEC’s website at www.sec.gov. In addition, the fund’s Form N-Q may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. You may call the SEC at 1-800-SEC-0330 for information about the SEC’s website or the operation of the Public Reference Room.

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 October 31, 2017, Putnam employees had approximately $515,000,000 and the Trustees had approximately $91,000,000 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.

16 Convertible Securities Fund

Important notice regarding Putnam’s privacy policy

In order to conduct business with our shareholders, we must obtain certain personal information such as account holders’ names, addresses, Social Security numbers, and dates of birth. Using this information, we are able to maintain accurate records of accounts and transactions.

It is our policy to protect the confidentiality of our shareholder information, whether or not a shareholder currently owns shares of our funds. In particular, it is our policy not to sell information about you or your accounts to outside marketing firms. We have safeguards in place designed to prevent unauthorized access to our computer systems and procedures to protect personal information from unauthorized use.

Under certain circumstances, we must share account information with outside vendors who provide services to us, such as mailings and proxy solicitations. In these cases, the service providers enter into confidentiality agreements with us, and we provide only the information necessary to process transactions and perform other services related to your account. Finally, it is our policy to share account information with your financial representative, if you’ve listed one on your Putnam account.

Convertible Securities Fund 17

Trustee approval of management contract

General conclusions

The Board of Trustees of The Putnam Funds oversees the management of each fund and, as required by law, determines annually whether to approve the continuance of your fund’s management contract with Putnam Investment Management, LLC (“Putnam Management”) and the sub-management contract with respect to your fund between Putnam Management and its affiliate, Putnam Investments Limited (“PIL”). The Board, with the assistance of its Contract Committee, requests and evaluates all information it deems reasonably necessary under the circumstances in connection with its annual contract review. The Contract Committee consists solely of Trustees who are not “interested persons” (as this term is defined in the Investment Company Act of 1940, as amended (the “1940 Act”)) of The Putnam Funds (“Independent Trustees”).

At the outset of the review process, members of the Board’s independent staff and independent legal counsel discussed with representatives of Putnam Management the annual contract review materials furnished to the Contract Committee during the course of the previous year’s review, identifying possible changes in these materials that might be necessary or desirable for the coming year. Following these discussions and in consultation with the Contract Committee, the Independent Trustees’ independent legal counsel requested that Putnam Management and its affiliates furnish specified information, together with any additional information that Putnam Management considered relevant, to the Contract Committee. Over the course of several months ending in June 2017, the Contract Committee met on a number of occasions with representatives of Putnam Management, and separately in executive session, to consider the information that Putnam Management provided. Throughout this process, the Contract Committee was assisted by the members of the Board’s independent staff and by independent legal counsel for The Putnam Funds and the Independent Trustees.

In May 2017, the Contract Committee met in executive session to discuss and consider its recommendations with respect to the continuance of the contracts. At the Trustees’ June 2017 meeting, the Contract Committee met in executive session with the other Independent Trustees to review a summary of the key financial, performance and other data that the Contract Committee considered in the course of its review. The Contract Committee then presented its written report, which summarized the key factors that the Committee had considered and set forth its recommendations. The Contract Committee recommended, and the Independent Trustees approved, the continuance of your fund’s management and sub-management contracts, effective July 1, 2017. (Because PIL is an affiliate of Putnam Management and Putnam Management remains fully responsible for all services provided by PIL, the Trustees have not attempted to evaluate PIL as a separate entity, and all subsequent references to Putnam Management below should be deemed to include reference to PIL as necessary or appropriate in the context.)

The Independent Trustees’ approval was based on the following conclusions:

• That the fee schedule in effect for your fund represented reasonable compensation in light of the nature and quality of the services being provided to the fund, the fees paid by competitive funds, the costs incurred by Putnam Management in providing services to the fund, and the continued application of certain reductions and waivers noted below; and

• That the fee schedule in effect for your fund represented an appropriate sharing between fund shareholders and Putnam Management of such economies of scale as may exist in the management of the fund at current asset levels.

These conclusions were based on a comprehensive consideration of all information provided to the Trustees and were not the result of any single factor. Some of the factors that figured particularly in the Trustees’ deliberations and how the Trustees considered these factors are described below, although individual Trustees may have evaluated the information presented differently, giving different weights to various factors. It is also important to recognize that the management arrangements for your fund and the other Putnam funds are the result of many years of review and discussion between the Independent Trustees and Putnam Management, that some aspects of the arrangements may receive greater scrutiny in some years than others, and that the Trustees’ conclusions may be based, in part, on their consideration of fee arrangements in previous years. For example, with some minor exceptions, the funds’ current fee arrangements under the

18 Convertible Securities Fund

management contracts were first implemented at the beginning of 2010 following extensive review by the Contract Committee and discussions with representatives of Putnam Management, as well as approval by shareholders.

Management fee schedules and total expenses

The Trustees reviewed the management fee schedules in effect for all Putnam funds, including fee levels and breakpoints. The Trustees also reviewed the total expenses of each Putnam fund, recognizing that in most cases management fees represented the major, but not the sole, determinant of total costs to fund shareholders. (In a few instances, funds have implemented so-called “all-in” management fees covering substantially all routine fund operating costs.)

In reviewing fees and expenses, the Trustees generally focus their attention on material changes in circumstances — for example, changes in assets under management, changes in a fund’s investment strategy, changes in Putnam Management’s operating costs or profitability, or changes in competitive practices in the mutual fund industry — that suggest that consideration of fee changes might be warranted. The Trustees concluded that the circumstances did not indicate that changes to the management fee structure for your fund would be appropriate at this time.

Under its management contract, your fund has the benefit of breakpoints in its management fee schedule that provide shareholders with economies of scale in the form of reduced fee rates as assets under management in the Putnam family of funds increase. The Trustees concluded that the fee schedule in effect for your fund represented an appropriate sharing of economies of scale between fund shareholders and Putnam Management.

As in the past, the Trustees also focused on the competitiveness of each fund’s total expense ratio. In order to support the effort to have fund expenses meet competitive standards, the Trustees and Putnam Management have implemented certain expense limitations that were in effect during your fund’s fiscal year ending in 2016. These expense limitations were: (i) a contractual expense limitation applicable to specified retail open-end funds, including your fund, of 25 basis points (until September 1, 2016, this limitation was 32 basis points) on investor servicing fees and expenses and (ii) a contractual expense limitation applicable to specified open-end funds, including your fund, of 20 basis points on so-called “other expenses” (i.e., all expenses exclusive of management fees, distribution fees, investor servicing fees, investment-related expenses, interest, taxes, brokerage commissions, acquired fund fees and expenses and extraordinary expenses). These expense limitations attempt to maintain competitive expense levels for the funds. Most funds, including your fund, had sufficiently low expenses that these expense limitations were not operative during their fiscal years ending in 2016. Putnam Management has agreed to maintain these expense limitations until at least February 28, 2019. Putnam Management’s support for these expense limitation arrangements was an important factor in the Trustees’ decision to approve the continuance of your fund’s management and sub-management contracts.

The Trustees reviewed comparative fee and expense information for a custom group of competitive funds selected by Broadridge Financial Solutions, Inc. (“Broadridge”). This comparative information included your fund’s percentile ranking for effective management fees and total expenses (excluding any applicable 12b-1 fee), which provides a general indication of your fund’s relative standing. In the custom peer group, your fund ranked in the second quintile in effective management fees (determined for your fund and the other funds in the custom peer group based on fund asset size and the applicable contractual management fee schedule) and in the second quintile in total expenses (excluding any applicable 12b-1 fees) as of December 31, 2016. The first quintile represents the least expensive funds and the fifth quintile the most expensive funds. The fee and expense data reported by Broadridge as of December 31, 2016 reflected the most recent fiscal year-end data available in Broadridge’s database at that time.

In connection with their review of fund management fees and total expenses, the Trustees also reviewed the costs of the services provided and the profits realized by Putnam Management and its affiliates from their contractual relationships with the funds. This information included trends in revenues, expenses and profitability of Putnam Management and its affiliates relating to the investment management, investor servicing and distribution services provided to the funds. In this regard, the Trustees also reviewed an analysis of Putnam Management’s revenues, expenses and profitability, allocated on a fund-by-fund basis, with respect to the funds’ management, distribution, and investor servicing contracts.

Convertible Securities Fund 19

For each fund, the analysis presented information about revenues, expenses and profitability for each of the agreements separately and for the agreements taken together on a combined basis. The Trustees concluded that, at current asset levels, the fee schedules in place represented reasonable compensation for the services being provided and represented an appropriate sharing between fund shareholders and Putnam Management of such economies of scale as may exist in the management of the Putnam funds at that time.

The information examined by the Trustees in connection with their annual contract review for the Putnam funds included information regarding fees charged by Putnam Management and its affiliates to institutional clients, including defined benefit pension and profit-sharing plans, charities, college endowments, foundations, sub-advised third-party mutual funds, state, local and non-U.S. government entities, and corporations. This information included, in cases where an institutional product’s investment strategy corresponds with a fund’s strategy, comparisons of those fees with fees charged to the Putnam funds, as well as an assessment of the differences in the services provided to these different types of clients as compared to the services provided to the Putnam Funds. The Trustees observed that the differences in fee rates between these clients and the Putnam funds are by no means uniform when examined by individual asset sectors, suggesting that differences in the pricing of investment management services to these types of clients may reflect, among other things, historical competitive forces operating in separate markets. The Trustees considered the fact that in many cases fee rates across different asset classes are higher on average for mutual funds than for institutional clients, as well as the differences between the services that Putnam Management provides to the Putnam funds and those that it provides to its other clients. The Trustees did not rely on these comparisons to any significant extent in concluding that the management fees paid by your fund are reasonable.

Investment performance

The quality of the investment process provided by Putnam Management represented a major factor in the Trustees’ evaluation of the quality of services provided by Putnam Management under your fund’s management contract. The Trustees were assisted in their review of the Putnam funds’ investment process and performance by the work of the investment oversight committees of the Trustees, which meet on a regular basis with the funds’ portfolio teams and with the Chief Investment Officers and other senior members of Putnam Management’s Investment Division throughout the year. In addition, in response to a request from the Independent Trustees, Putnam Management provided the Trustees with in-depth presentations regarding each of the equity and fixed income investment teams, including the operation of the teams and their investment approaches. The Trustees concluded that Putnam Management generally provides a high-quality investment process — based on the experience and skills of the individuals assigned to the management of fund portfolios, the resources made available to them, and in general Putnam Management’s ability to attract and retain high-quality personnel — but also recognized that this does not guarantee favorable investment results for every fund in every time period.

The Trustees considered that 2016 was a challenging year for the performance of the Putnam funds, with generally disappointing results for the international and global equity funds and taxable fixed income funds, mixed results for small-cap equity, Spectrum, global asset allocation, equity research and tax exempt fixed income funds, but generally strong results for U.S. equity funds. The Trustees noted, however, that they were encouraged by the positive performance trend since mid-year 2016 across most Putnam Funds. In particular, from May 1, 2016 through April 30, 2017, 51% of Putnam Fund assets were in the top quartile and 87% were above the median of the Putnam Funds’ competitive industry rankings. They noted that the longer-term performance of the Putnam funds generally continued to be strong, exemplified by the fact that the Putnam funds were ranked by the Barron’s/Lipper Fund Families survey as the 5th-best performing mutual fund complex out of 54 complexes for the five-year period ended December 31, 2016. In addition, while the survey ranked the Putnam Funds 52nd out of 61 mutual fund complexes for the one-year period ended 2016, the Putnam Funds have ranked 1st or 2nd in the survey for the one-year period three times since 2009 (most recently in 2013). They also noted, however, the disappointing investment performance of some funds for periods ended December 31, 2016 and considered information provided by Putnam Management regarding the factors contributing to the underperformance and actions being taken to improve the performance of these particular funds. The Trustees indicated

20 Convertible Securities Fund

their intention to continue to monitor closely the performance of those funds, including the effectiveness of any efforts Putnam Management has undertaken to address underperformance and whether additional actions to address areas of underperformance are warranted.

For purposes of the Trustees’ evaluation of the Putnam Funds’ investment performance, the Trustees generally focus on a competitive industry ranking of each fund’s total net return over a one-year, three-year and five-year period. For a number of Putnam funds with relatively unique investment mandates for which Putnam Management informed the Trustees that meaningful competitive performance rankings are not considered to be available, the Trustees evaluated performance based on their total gross and net returns and, in most cases, comparisons of those returns with the returns of selected investment benchmarks. In the case of your fund, the Trustees considered that its class A share cumulative total return performance at net asset value was in the following quartiles of its Lipper Inc. (“Lipper”) peer group (Lipper Convertible Securities Funds) for the one-year, three-year and five-year periods ended December 31, 2016 (the first quartile representing the best-performing funds and the fourth quartile the worst-performing funds):


One-year period	2nd
Three-year period	2nd
Five-year period	2nd

Over the one-year, three-year and five-year periods ended December 31, 2016, there were 94, 75 and 72 funds, respectively, in your fund’s Lipper peer group. (When considering performance information, shareholders should be mindful that past performance is not a guarantee of future results.)

The Trustees also considered Putnam Management’s continued efforts to support fund performance through initiatives including structuring compensation for portfolio managers and research analysts to enhance accountability for fund performance, emphasizing accountability in the portfolio management process, and affirming its commitment to a fundamental-driven approach to investing. The Trustees noted further that Putnam Management continued to strengthen its fundamental research capabilities by adding new investment personnel.

Brokerage and soft-dollar allocations; investor servicing

The Trustees considered various potential benefits that Putnam Management may receive in connection with the services it provides under the management contract with your fund. These include benefits related to brokerage allocation and the use of soft dollars, whereby a portion of the commissions paid by a fund for brokerage may be used to acquire research services that are expected to be useful to Putnam Management in managing the assets of the fund and of other clients. Subject to policies established by the Trustees, soft dollars generated by these means are used predominantly to acquire brokerage and research services (including third-party research and market data) that enhance Putnam Management’s investment capabilities and supplement Putnam Management’s internal research efforts. However, the Trustees noted that a portion of available soft dollars continues to be used to pay fund expenses. The Trustees indicated their continued intent to monitor regulatory and industry developments in this area with the assistance of their Brokerage Committee, including any developments with respect to the European Union’s updated Markets in Financial Instruments Directive and its potential impact on PIL’s use of client commissions to obtain investment research. The Trustees also indicated their continued intent to monitor the allocation of the Putnam funds’ brokerage in order to ensure that the principle of seeking best price and execution remains paramount in the portfolio trading process.

Putnam Management may also receive benefits from payments that the funds make to Putnam Management’s affiliates for investor or distribution services. In conjunction with the annual review of your fund’s management and sub-management contracts, the Trustees reviewed your fund’s investor servicing agreement with Putnam Investor Services, Inc. (“PSERV”) and its distributor’s contracts and distribution plans with Putnam Retail Management Limited Partnership (“PRM”), both of which are affiliates of Putnam Management. The Trustees concluded that the fees payable by the funds to PSERV and PRM, as applicable, for such services are fair and reasonable in relation to the nature and quality of such services, the fees paid by competitive funds, and the costs incurred by PSERV and PRM, as applicable, in providing such services. Furthermore, the Trustees were of the view that the services provided were required for the operation of the funds, and that they were of a quality at least equal to those provided by other providers.

Convertible Securities Fund 21

Financial statements

These sections of the report, as well as the accompanying Notes, preceded by the Report of Independent Registered Public Accounting Firm, 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, which is calculated separately for each class of shares. (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 year.

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.

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.

22 Convertible Securities Fund

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders
Putnam Convertible Securities Fund:

We have audited the accompanying statement of assets and liabilities of Putnam Convertible Securities Fund (the fund), including the fund’s portfolio, as of October 31, 2017, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the years in the two-year period then ended, and the financial highlights for each of the years or periods in the five-year period then ended. These financial statements and financial highlights are the responsibility of the fund’s management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits.

We conducted our audits in accordance with standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of October 31, 2017, by correspondence with the custodian and brokers or by other appropriate auditing procedures. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Putnam Convertible Securities Fund as of October 31, 2017, the results of its operations for the year then ended, the changes in its net assets for each of the years in the two-year period then ended, and the financial highlights for each of the years or periods in the five-year period then ended, in conformity with U.S. generally accepted accounting principles.

Boston, Massachusetts
December 13, 2017

Convertible Securities Fund 23

The fund’s portfolio 10/31/17


	Principal
CONVERTIBLE BONDS AND NOTES (71.2%)*	amount	Value
Aerospace and defense (1.4%)
Aerojet Rocketdyne Holdings, Inc. 144A cv. sr. unsec. sub. notes
2.25%, 12/15/23	$4,693,000	$6,479,273
Kaman Corp. 144A cv. sr. unsec. notes 3.25%, 5/1/24	3,320,000	3,587,675
		10,066,948
Automotive (1.6%)
Navistar International Corp. cv. sr. unsec. sub. bonds
4.75%, 4/15/19	6,436,000	6,987,083
Tesla, Inc. cv. sr. unsec. sub. notes 1.25%, 3/1/21	4,090,000	4,560,350
		11,547,433
Biotechnology (2.4%)
BioMarin Pharmaceutical, Inc. cv. sr. unsec. sub. notes
1.50%, 10/15/20	4,469,000	5,069,522
Medicines Co. (The) cv. sr. unsec. unsub. notes 2.75%, 7/15/23	6,380,000	5,977,263
Merrimack Pharmaceuticals, Inc. cv. sr. unsec. unsub. notes
4.50%, 7/15/20	2,734,000	2,460,600
Neurocrine Biosciences, Inc. 144A cv. sr. unsec. notes
2.25%, 5/15/24	3,160,000	3,620,175
		17,127,560
Broadcasting (2.2%)
Liberty Media Corp. cv. sr. unsec. bonds 1.375%, 10/15/23	9,076,000	10,881,216
Liberty Media Corp. cv. sr. unsec. unsub. bonds 2.25%, 9/30/46	4,430,000	4,637,656
		15,518,872
Cable television (1.8%)
DISH Network Corp. cv. sr. unsec. notes 3.375%, 8/15/26	12,182,000	13,103,264
		13,103,264
Capital goods (1.1%)
Dycom Industries, Inc. cv. sr. unsec. notes 0.75%, 9/15/21	6,700,000	7,780,375
		7,780,375
Commercial and consumer services (5.3%)
Euronet Worldwide, Inc. cv. sr. unsec. bonds 1.50%, 10/1/44	5,404,000	7,369,705
Macquarie Infrastructure Corp. cv. sr. unsec. unsub. notes
2.00%, 10/1/23	6,904,000	6,619,210
Priceline Group, Inc. (The) cv. sr. unsec. bonds 0.90%, 9/15/21	2,485,000	2,963,363
Priceline Group, Inc. (The) cv. sr. unsec. unsub. notes
1.00%, 3/15/18	7,031,000	14,176,254
Square, Inc. 144A cv. sr. unsec. notes 0.375%, 3/1/22	3,966,000	6,707,498
		37,836,030
Components (0.6%)
Finisar Corp. cv. sr. unsec. unsub. bonds 0.50%, 12/15/36	4,510,000	4,307,050
		4,307,050
Computers (5.3%)
Avid Technology, Inc. cv. sr. unsec. notes 2.00%, 6/15/20	5,874,000	4,647,803
Citrix Systems, Inc. cv. sr. unsec. notes 0.50%, 4/15/19	3,935,000	4,825,294
Electronics For Imaging, Inc. cv. sr. unsec. unsub. bonds
0.75%, 9/1/19	6,885,000	6,712,875
HubSpot, Inc. 144A cv. sr. unsec. notes 0.25%, 6/1/22	5,108,000	5,759,270
RealPage, Inc. 144A cv. sr. unsec. notes 1.50%, 11/15/22	7,205,000	8,839,634

24 Convertible Securities Fund


	Principal
CONVERTIBLE BONDS AND NOTES (71.2%)* cont.	amount	Value
Computers cont.
ServiceNow, Inc. cv. sr. unsec. unsub. bonds zero %, 11/1/18	$3,340,000	$5,719,750
Synchronoss Technologies, Inc. cv. sr. unsec. notes 0.75%, 8/15/19	1,834,000	1,713,644
		38,218,270
Conglomerates (0.8%)
Siemens Financieringsmaatschappij NV cv. company guaranty sr.
unsec. bonds 1.65%, 8/16/19 (Netherlands)	4,750,000	5,672,165
		5,672,165
Construction (0.7%)
Cemex SAB de CV cv. unsec. sub. notes 3.72%, 3/15/20 (Mexico)	4,700,000	4,996,688
		4,996,688
Consumer finance (0.6%)
Encore Capital Group, Inc. cv. company guaranty sr. unsec. bonds
3.00%, 7/1/20	3,688,000	4,326,485
		4,326,485
Consumer services (2.5%)
IAC FinanceCo, Inc. 144A cv. company guaranty sr. unsec. notes
0.875%, 10/1/22	6,279,000	6,777,396
Liberty Expedia Holdings, Inc. cv. sr. unsec. unsub. bonds
1.00%, 6/30/47	6,271,000	6,412,098
Wayfair, Inc. 144A cv. sr. unsec. sub. notes 0.375%, 9/1/22	4,547,000	4,441,851
		17,631,345
Electrical equipment (0.5%)
II-VI, Inc. 144A cv. sr. unsec. notes 0.25%, 9/1/22	3,087,000	3,596,355
		3,596,355
Electronics (12.8%)
GT Advanced Technologies, Inc. cv. sr. unsec. sub. notes
3.00%, 12/15/20 ^F	2,944,000	294
Inphi Corp. cv. sr. unsec. notes 0.75%, 9/1/21	5,270,000	5,484,094
Intel Corp. cv. jr. unsec. sub. notes 3.25%, 8/1/39	7,690,000	16,725,750
Microchip Technology, Inc. 144A cv. sr. unsec. sub. notes
1.625%, 2/15/27	19,597,000	24,679,972
Micron Technology, Inc. cv. sr. unsec. bonds 3.00%, 11/15/43	6,270,000	9,718,500
Micron Technology, Inc. cv. sr. unsec. bonds Ser. E, 1.625%, 2/15/33	2,108,000	8,525,543
NXP Semiconductors NV cv. sr. unsec. bonds 1.00%, 12/1/19	4,624,000	5,696,190
ON Semiconductor Corp. cv. company guaranty sr. unsec. unsub.
notes 1.00%, 12/1/20	8,015,000	10,334,341
OSI Systems, Inc. 144A cv. sr. unsec. unsub. notes 1.25%, 9/1/22	5,990,000	6,289,500
TTM Technologies, Inc. cv. sr. unsec. notes 1.75%, 12/15/20	2,600,000	4,486,625
		91,940,809
Entertainment (0.7%)
Live Nation Entertainment, Inc. cv. sr. unsec. bonds 2.50%, 5/15/19	3,738,000	4,941,169
		4,941,169
Health-care services (0.6%)
Teladoc, Inc. 144A cv. sr. unsec. notes 3.00%, 12/15/22	3,770,000	4,055,106
		4,055,106
Insurance (0.5%)
Heritage Insurance Holdings, Inc. 144A cv. company guaranty sr.
unsec. bonds 5.875%, 8/1/37	2,775,000	3,439,266
		3,439,266

Convertible Securities Fund 25


	Principal
CONVERTIBLE BONDS AND NOTES (71.2%)* cont.	amount	Value
Investment banking/Brokerage (0.5%)
Hercules Capital, Inc. 144A cv. sr. unsec. notes 4.375%, 2/1/22	$3,194,000	$3,263,869
		3,263,869
Manufacturing (0.8%)
Greenbrier Cos., Inc. (The) 144A cv. sr. unsec. notes 2.875%, 2/1/24	4,873,000	5,698,364
		5,698,364
Media (1.1%)
Liberty Interactive, LLC 144A cv. sr. unsec. bonds 1.75%, 9/30/46	7,150,000	8,075,031
		8,075,031
Medical technology (1.7%)
China Medical Technologies, Inc. cv. sr. unsec. bonds Ser. CMT,
4.00%, 8/15/18 (China) (In default) ^{† F}	3,213,000	205,632
China Medical Technologies, Inc. 144A cv. sr. unsec. notes 6.25%,
12/15/17 (China) (In default) ^{† F}	3,544,000	198,464
Hologic, Inc. cv. sr. unsec. unsub. notes stepped-coupon 2.00%
(zero %, 3/1/18), 3/1/42 ^††	3,058,000	3,799,565
Nevro Corp. cv. sr. unsec. unsub. notes 1.75%, 6/1/21	2,558,000	2,964,083
Wright Medical Group, Inc. cv. sr. unsec. notes 2.00%, 2/15/20	4,876,000	5,278,270
		12,446,014
Oil and gas (2.2%)
Chesapeake Energy Corp. 144A cv. sr. unsec. bonds 5.50%, 9/15/26	7,451,000	6,598,792
Oasis Petroleum, Inc. cv. sr. unsec. notes 2.625%, 9/15/23	3,014,000	3,319,168
Whiting Petroleum Corp. cv. company guaranty sr. unsec. unsub.
notes 1.25%, 4/1/20	6,452,000	5,786,638
		15,704,598
Pharmaceuticals (5.0%)
Clovis Oncology, Inc. cv. sr. unsec. notes 2.50%, 9/15/21	3,315,000	4,798,463
Impax Laboratories, Inc. cv. sr. unsec. notes 2.00%, 6/15/22	5,405,000	5,350,950
Jazz Investments I, Ltd. cv. company guaranty sr. unsec. sub.
bonds 1.875%, 8/15/21 (Ireland)	11,131,000	11,451,016
Pacira Pharmaceuticals, Inc. (Delaware) 144A cv. sr. unsec. sub.
notes 2.375%, 4/1/22	7,536,000	6,975,510
Sucampo Pharmaceuticals, Inc. cv. sr. unsec. notes
3.25%, 12/15/21	5,149,000	4,975,221
Teligent, Inc. cv. sr. unsec. notes 3.75%, 12/15/19	2,975,000	2,731,422
		36,282,582
Real estate (3.3%)
Blackstone Mortgage Trust, Inc. cv. sr. unsec. unsub. notes
5.25%, 12/1/18 ^R	7,500,000	8,695,313
Colony Starwood Homes 144A cv. sr. unsec. notes 3.50%, 1/15/22 ^R	6,182,000	6,916,113
Starwood Property Trust, Inc. cv. sr. unsec. unsub. notes
4.00%, 1/15/19 ^R	7,045,000	7,767,113
		23,378,539
Semiconductor (5.8%)
Cypress Semiconductor Corp. cv. sr. unsec. notes 4.50%, 1/15/22	4,361,000	5,865,545
Integrated Device Technology, Inc. cv. sr. unsec. unsub. notes
0.875%, 11/15/22	5,624,000	6,474,630
Jazz US Holdings, Inc. cv. company guaranty sr. unsec. notes
8.00%, 12/31/18	1,238,000	4,126,409

26 Convertible Securities Fund


	Principal
CONVERTIBLE BONDS AND NOTES (71.2%)* cont.	amount	Value
Semiconductor cont.
Novellus Systems, Inc. cv. company guaranty sr. unsec. notes
2.625%, 5/15/41	$2,870,000	$17,788,619
Teradyne, Inc. 144A cv. sr. unsec. notes 1.25%, 12/15/23	5,265,000	7,598,053
		41,853,256
Shipping (1.1%)
Air Transport Services Group, Inc. 144A cv. sr. unsec. notes
1.125%, 10/15/24	4,888,000	5,111,015
Scorpio Tankers, Inc. 144A cv. sr. unsec. sub. notes 2.375%, 7/1/19	3,171,000	2,834,081
		7,945,096
Software (2.8%)
Nice Systems, Inc. 144A cv. company guaranty sr. unsec. notes
1.25%, 1/15/24	5,668,000	6,521,743
Red Hat, Inc. cv. sr. unsec. unsub. bonds 0.25%, 10/1/19	3,490,000	5,786,856
Safeguard Scientifics, Inc. cv. sr. unsec. bonds 5.25%, 5/15/18	2,623,000	2,706,608
Workday, Inc. 144A cv. sr. unsec. notes 0.25%, 10/1/22	5,256,000	5,311,845
		20,327,052
Technology services (3.7%)
Carbonite, Inc. 144A cv. sr. unsec. unsub. notes 2.50%, 4/1/22	2,600,000	3,006,250
Fidelity National Financial, Inc. cv. sr. unsec. unsub. notes
4.25%, 8/15/18	2,245,000	6,490,834
J2 Cloud Services, LLC cv. sr. unsec. notes 3.25%, 6/15/29	4,500,000	5,563,125
Proofpoint, Inc. cv. sr. unsec. unsub. notes 0.75%, 6/15/20	5,287,000	6,810,317
Twitter, Inc. cv. sr. unsec. unsub. bonds 1.00%, 9/15/21	5,290,000	4,876,719
		26,747,245
Telecommunications (0.4%)
CalAmp Corp. cv. sr. unsec. notes 1.625%, 5/15/20	3,005,000	3,200,325
Powerwave Technologies, Inc. cv. unsec. sub. notes 3.875%,
10/1/27 (In default) ^{† F}	5,121,000	512
		3,200,837
Tobacco (0.8%)
Vector Group, Ltd. cv. sr. unsec. sub. notes 1.75%, 4/15/20	5,295,000	5,950,256
		5,950,256
Trucks and parts (0.6%)
Horizon Global Corp. cv. sr. unsec. unsub. notes 2.75%, 7/1/22	4,018,000	4,012,969
		4,012,969
Total convertible bonds and notes (cost $438,870,183)		$510,990,898

CONVERTIBLE PREFERRED STOCKS (22.8%)*	Shares	Value
Banking (2.8%)
Bank of America Corp. Ser. L, 7.25% cv. pfd.	6,315	$8,189,766
Wells Fargo & Co. Ser. L, 7.50% cv. pfd.	9,058	11,967,883
		20,157,649
Computers (0.3%)
NCR Corp. Ser. A, 5.50% cv. pfd. ^‡‡	1,653	2,192,820
		2,192,820
Consumer (1.2%)
Stanley Black & Decker, Inc. $5.375 cv. pfd.	75,882	8,916,894
		8,916,894

Convertible Securities Fund 27


CONVERTIBLE PREFERRED STOCKS (22.8%)* cont.	Shares	Value
Electric utilities (2.7%)
DTE Energy Co. $3.25 cv. pfd.	155,415	$8,561,812
NextEra Energy, Inc. $3.06 cv. pfd.	186,740	10,672,191
		19,234,003
Financial (1.2%)
AMG Capital Trust II $2.575 cv. pfd. ^S	141,220	8,543,810
		8,543,810
Health-care services (1.1%)
Anthem, Inc. $2.63 cv. pfd.	149,899	7,985,120
		7,985,120
Manufacturing (1.7%)
Belden, Inc. $6.75 cv. pfd. ^S	59,316	6,379,436
Rexnord Corp. $2.88 cv. pfd.	101,243	5,802,489
		12,181,925
Medical technology (1.7%)
Becton Dickinson and Co. Ser. A, $3.063 cv. pfd. ^S	220,455	12,495,389
		12,495,389
Oil and gas (1.1%)
Hess Corp. $2.00 cv. pfd. ^S	137,480	7,630,140
		7,630,140
Pharmaceuticals (1.6%)
Allergan PLC Ser. A, 5.50% cv. pfd.	17,865	11,455,931
		11,455,931
Power producers (0.4%)
Dynegy, Inc. $7.00 cv. pfd.	32,928	2,696,803
		2,696,803
Real estate (1.7%)
Alexandria Real Estate Equities, Inc. Ser. D, $1.75 cv. pfd. ^R	145,767	5,391,105
iStar, Inc. $2.25 cv. pfd. ^R	132,360	6,554,467
		11,945,572
Regional Bells (—%)
Cincinnati Bell, Inc. Ser. B, $3.378 cum. cv. pfd.	190	9,779
		9,779
Technology services (1.1%)
Mandatory Exchangeable Trust 144A $5.75 cv. pfd.	38,194	8,005,080
		8,005,080
Telecommunications (4.2%)
American Tower Corp. $5.50 cv. pfd. ^R	84,485	10,650,390
Crown Castle International Corp. Ser. A, 6.875% cv. pfd.	10,003	10,971,290
T-Mobile US, Inc. Ser. A, $2.75 cv. pfd.	83,961	8,132,462
		29,754,142
Total convertible preferred stocks (cost $147,155,235)		$163,205,057

COMMON STOCKS (3.2%)*	Shares	Value
Alphabet, Inc. Class C ^†	1,890	$1,921,450
Bank of America Corp.	84,420	2,312,264
Citigroup, Inc.	28,780	2,115,330
Danaher Corp.	20,025	1,847,707
GT Advanced Technologies, Inc. ^F	476	5
Live Nation Entertainment, Inc. ^†^S	67,405	2,950,991

28 Convertible Securities Fund


COMMON STOCKS (3.2%)* cont.			Shares	Value
NVIDIA Corp.			13,050	$2,698,871
salesforce.com, Inc. ^†			76,615	7,840,779
Stone Energy Corp. ^†^S			32,868	966,977
Total common stocks (cost $17,774,322)				$22,654,374

			Principal
CORPORATE BONDS AND NOTES (0.1%)*			amount	Value
Stone Energy Corp. company guaranty notes 7.50%, 5/31/22			$1,088,508	$1,069,459
Total corporate bonds and notes (cost $1,234,430)				$1,069,459

	Expiration	Strike
WARRANTS (—%)* ^†	date	price	Warrants	Value
GT Advanced Technologies, Inc. ^F	3/17/19	$0.00	487	$5
GT Advanced Technologies, Inc. ^F	3/17/19	0.00	331	3
Total warrants (cost $91,926)				$8

SHORT-TERM INVESTMENTS (5.5%)*			Shares	Value
Putnam Short Term Investment Fund 1.22% ^L			20,689,743	$20,689,743
Putnam Cash Collateral Pool, LLC 1.31% ^d			18,807,175	18,807,175
Total short-term investments (cost $39,496,918)				$39,496,918

TOTAL INVESTMENTS
Total investments (cost $644,623,014)				$737,416,714

Notes to the fund’s portfolio

Unless noted otherwise, the notes to the fund’s portfolio are for the close of the fund’s reporting period, which ran from November 1, 2016 through October 31, 2017 (the reporting period). Within the following notes to the portfolio, references to “ASC 820” represent Accounting Standards Codification 820 Fair Value Measurements and Disclosures, references to “Putnam Management” represent Putnam Investment Management, LLC, the fund’s manager, an indirect wholly-owned subsidiary of Putnam Investments, LLC and references to “OTC”, if any, represent over-the-counter.

* Percentages indicated are based on net assets of $717,370,706.

^† This security is non-income-producing.

^†^† The interest rate and date shown parenthetically represent the new interest rate to be paid and the date the fund will begin accruing interest at this rate.

^‡‡Income may be received in cash or additional securities at the discretion of the issuer. The rate shown in parenthesis is the rate paid in kind, if applicable.

^d Affiliated company. See Notes 1 and 5 to the financial statements regarding securities lending. The rate quoted in the security description is the annualized 7-day yield of the fund at the close of the reporting period.

^F This security is valued by Putnam Management at fair value following procedures approved by the Trustees. Securities are classified as Level 3 for ASC 820 based on the securities’ valuation inputs (Note 1).

^L Affiliated company (Note 5). The rate quoted in the security description is the annualized 7-day yield of the fund at the close of the reporting period.

^R Real Estate Investment Trust.

^S Security on loan, in part or in entirety, at the close of the reporting period (Note 1).

Debt obligations are considered secured unless otherwise indicated.

144A after the name of an issuer represents securities exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers.

The dates shown on debt obligations are the original maturity dates.

Convertible Securities Fund 29

ASC 820 establishes a three-level hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of the fund’s investments. The three levels are defined as follows:

Level 1: Valuations based on quoted prices for identical securities in active markets.

Level 2: Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly.

Level 3: Valuations based on inputs that are unobservable and significant to the fair value measurement.

The following is a summary of the inputs used to value the fund’s net assets as of the close of the reporting period:


			Valuation inputs
Investments in securities:	Level 1	Level 2		Level 3
Common stocks^*:
Conglomerates	$1,847,707	$—		$—
Consumer cyclicals	2,950,991	—		—
Energy	966,977	—		—
Financials	4,427,594	—		—
Technology	12,461,100	—		5
Total common stocks	22,654,369	—		5

Convertible bonds and notes	—	510,585,996		404,902
Convertible preferred stocks	—	163,205,057		—
Corporate bonds and notes	—	1,069,459		—
Warrants	—	—		8
Short-term investments	20,689,743	18,807,175		—
Totals by level	$43,344,112	$693,667,687		$404,915

^*Common stock classifications are presented at the sector level, which may differ from the fund’s portfolio presentation.

During the reporting period, transfers within the fair value hierarchy, if any (other than certain transfers involving non-U.S. equity securities as described in Note 1), did not represent, in the aggregate, more than 1% of the fund’s net assets measured as of the end of the period. Transfers are accounted for using the end of period pricing valuation method.

At the start and close of the reporting period, Level 3 investments in securities represented less than 1% of the fund’s net assets and were not considered a significant portion of the fund’s portfolio.

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

30 Convertible Securities Fund

Statement of assets and liabilities 10/31/17


ASSETS
Investment in securities, at value, including $18,396,410 of securities on loan (Note 1):
Unaffiliated issuers (identified cost $605,126,096)	$697,919,796
Affiliated issuers (identified cost $39,496,918) (Notes 1 and 5)	39,496,918
Dividends, interest and other receivables	3,188,432
Receivable for shares of the fund sold	494,224
Prepaid assets	42,812
Total assets	741,142,182

LIABILITIES
Payable for investments purchased	2,904,244
Payable for shares of the fund repurchased	999,444
Payable for compensation of Manager (Note 2)	377,128
Payable for custodian fees (Note 2)	6,542
Payable for investor servicing fees (Note 2)	156,894
Payable for Trustee compensation and expenses (Note 2)	274,371
Payable for administrative services (Note 2)	2,924
Payable for distribution fees (Note 2)	134,810
Collateral on securities loaned, at value (Note 1)	18,807,175
Other accrued expenses	107,944
Total liabilities	23,771,476

Net assets	$717,370,706

REPRESENTED BY
Paid-in capital (Unlimited shares authorized) (Notes 1 and 4)	$607,705,331
Undistributed net investment income (Note 1)	11,743,798
Accumulated net realized gain on investments (Note 1)	5,127,877
Net unrealized appreciation of investments	92,793,700
Total — Representing net assets applicable to capital shares outstanding	$717,370,706

(Continued on next page)

Convertible Securities Fund 31

Statement of assets and liabilities cont.


COMPUTATION OF NET ASSET VALUE AND OFFERING PRICE
Net asset value and redemption price per class A share
($410,595,208 divided by 15,678,109 shares)	$26.19
Offering price per class A share (100/94.25 of $26.19)^*	$27.79
Net asset value and offering price per class B share ($8,201,407 divided by 319,679 shares)^**	$25.66
Net asset value and offering price per class C share ($42,891,737 divided by 1,657,078 shares)^**	$25.88
Net asset value and offering price per class I share ($11,494 divided by 439 shares)^†	$26.20
Net asset value and redemption price per class M share ($3,660,033 divided by 141,282 shares)	$25.91
Offering price per class M share (100/96.50 of $25.91)^*	$26.85
Net asset value, offering price and redemption price per class R share
($4,939,549 divided by 189,478 shares)	$26.07
Net asset value, offering price and redemption price per class Y share
($247,071,278 divided by 9,438,294 shares)	$26.18

^*On single retail sales of less than $50,000. On sales of $50,000 or more the offering price is reduced.

^**Redemption price per share is equal to net asset value less any applicable contingent deferred sales charge.

^†Net asset value may not recalculate due to rounding of fractional shares.

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

32 Convertible Securities Fund

Statement of operations Year ended 10/31/17


INVESTMENT INCOME
Dividends (net of foreign tax of $18,212)	$9,634,392
Interest (including interest income of $205,734 from investments in affiliated issuers) (Note 5)	7,331,688
Securities lending (net of expenses) (Notes 1 and 5)	52,930
Total investment income	17,019,010

EXPENSES
Compensation of Manager (Note 2)	4,263,573
Investor servicing fees (Note 2)	937,788
Custodian fees (Note 2)	16,393
Trustee compensation and expenses (Note 2)	37,718
Distribution fees (Note 2)	1,609,857
Administrative services (Note 2)	21,082
Other	303,944
Total expenses	7,190,355
Expense reduction (Note 2)	(1,378)
Net expenses	7,188,977

Net investment income	9,830,033

Net realized gain on securities from unaffiliated issuers (Notes 1 and 3)	29,135,804
Net unrealized appreciation of securities in unaffiliated issuers during the year	76,531,585
Net gain on investments	105,667,389

Net increase in net assets resulting from operations	$115,497,422

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

Convertible Securities Fund 33

Statement of changes in net assets


INCREASE (DECREASE) IN NET ASSETS	Year ended 10/31/17	Year ended 10/31/16
Operations
Net investment income	$9,830,033	$11,140,740
Net realized gain (loss) on investments	29,135,804	(5,835,246)
Net unrealized appreciation (depreciation) of investments	76,531,585	(678,068)
Net increase in net assets resulting from operations	115,497,422	4,627,426
Distributions to shareholders (Note 1):
From ordinary income
Net investment income
Class A	(7,923,900)	(9,161,647)
Class B	(106,310)	(140,515)
Class C	(556,131)	(813,337)
Class I	(248)	(237)
Class M	(55,057)	(60,684)
Class R	(85,268)	(90,919)
Class Y	(4,787,674)	(4,806,908)
From net realized long-term gain on investments
Class A	—	(18,198,242)
Class B	—	(417,431)
Class C	—	(2,554,123)
Class I	—	(342)
Class M	—	(143,679)
Class R	—	(181,132)
Class Y	—	(8,615,448)
Decrease from capital share transactions (Note 4)	(46,244,392)	(168,822,982)
Total increase (decrease) in net assets	55,738,442	(209,380,200)

NET ASSETS
Beginning of year	661,632,264	871,012,464
End of year (including undistributed net investment
income of $11,743,798 and $12,232,279, respectively)	$717,370,706	$661,632,264

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

34 Convertible Securities Fund

Financial highlights (For a common share outstanding throughout the period)


	INVESTMENT OPERATIONS				LESS DISTRIBUTIONS						RATIOS AND SUPPLEMENTAL DATA
												Ratio of	Ratio of net
	Net asset		Net realized			From						expenses	investment
	value,		and unrealized	Total from	From	net realized			Net asset	Total return	Net assets,	to average	income (loss)	Portfolio
	beginning	Net investment	gain (loss) on	investment	net investment	gain on	Total	Redemption	value, end	at net asset	end of period	net assets	to average	turnover
Period ended	of period	income (loss)^a	investments	operations	income	investments	distributions	fees	of period	value (%)^b	(in thousands)	(%)^c	net assets (%)	(%)
Class A
October 31, 2017	$22.55	.35	3.77	4.12	(.48)	—	(.48)	—	$26.19	18.44	$410,595	1.07	1.43	56
October 31, 2016	23.37	.35	.17	.52	(.49)	(.85)	(1.34)	—	22.55	2.49	404,101	1.09^d	1.59^d	49
October 31, 2015	25.60	.26	(.93)	(.67)	(.52)	(1.04)	(1.56)	—	23.37	(2.86)	517,495	1.06	1.04	67
October 31, 2014	23.57	.18	2.42	2.60	(.57)	—	(.57)	—	25.60	11.10	578,716	1.06	.72	63
October 31, 2013	20.09	.37	3.71	4.08	(.60)	—	(.60)	—^e	23.57	20.62	556,643	1.08	1.69	72
Class B
October 31, 2017	$22.10	.16	3.70	3.86	(.30)	—	(.30)	—	$25.66	17.56	$8,201	1.82	.68	56
October 31, 2016	22.93	.18	.15	.33	(.31)	(.85)	(1.16)	—	22.10	1.72	9,018	1.84^d	.84^d	49
October 31, 2015	25.13	.07	(.90)	(.83)	(.33)	(1.04)	(1.37)	—	22.93	(3.55)	11,374	1.81	.29	67
October 31, 2014	23.15	(.01)	2.38	2.37	(.39)	—	(.39)	—	25.13	10.27	13,228	1.81	(.04)	63
October 31, 2013	19.75	.20	3.64	3.84	(.44)	—	(.44)	—^e	23.15	19.68	12,009	1.83	.95	72
Class C
October 31, 2017	$22.29	.16	3.72	3.88	(.29)	—	(.29)	—	$25.88	17.52	$42,892	1.82	.68	56
October 31, 2016	23.11	.18	.16	.34	(.31)	(.85)	(1.16)	—	22.29	1.72	50,827	1.84^d	.84^d	49
October 31, 2015	25.32	.07	(.91)	(.84)	(.33)	(1.04)	(1.37)	—	23.11	(3.54)	72,536	1.81	.30	67
October 31, 2014	23.33	(.01)	2.39	2.38	(.39)	—	(.39)	—	25.32	10.27	73,451	1.81	(.06)	63
October 31, 2013	19.90	.20	3.67	3.87	(.44)	—	(.44)	—^e	23.33	19.68	50,931	1.83	.93	72
Class I
October 31, 2017	$22.55	.45	3.77	4.22	(.57)	—	(.57)	—	$26.20	18.93	$11	.69	1.80	56
October 31, 2016	23.38	.43	.15	.58	(.56)	(.85)	(1.41)	—	22.55	2.87	10	.69^d	1.95^d	49
October 31, 2015^†	25.33	.25	(1.77)	(1.52)	(.43)	—	(.43)	—	23.38	(6.05)^*	9	.45^*	.98^*	67
Class M
October 31, 2017	$22.31	.22	3.74	3.96	(.36)	—	(.36)	—	$25.91	17.88	$3,660	1.57	.93	56
October 31, 2016	23.14	.23	.16	.39	(.37)	(.85)	(1.22)	—	22.31	1.95	3,590	1.59^d	1.07^d	49
October 31, 2015	25.35	.13	(.91)	(.78)	(.39)	(1.04)	(1.43)	—	23.14	(3.32)	3,951	1.56	.54	67
October 31, 2014	23.35	.05	2.40	2.45	(.45)	—	(.45)	—	25.35	10.54	4,583	1.56	.21	63
October 31, 2013	19.91	.26	3.67	3.93	(.49)	—	(.49)	—^e	23.35	20.01	3,885	1.58	1.20	72
Class R
October 31, 2017	$22.45	.29	3.75	4.04	(.42)	—	(.42)	—	$26.07	18.15	$4,940	1.32	1.18	56
October 31, 2016	23.28	.29	.16	.45	(.43)	(.85)	(1.28)	—	22.45	2.21	4,898	1.34^d	1.32^d	49
October 31, 2015	25.50	.20	(.93)	(.73)	(.45)	(1.04)	(1.49)	—	23.28	(3.09)	4,972	1.31	.79	67
October 31, 2014	23.48	.12	2.41	2.53	(.51)	—	(.51)	—	25.50	10.83	6,569	1.31	.46	63
October 31, 2013	20.02	.31	3.70	4.01	(.55)	—	(.55)	—^e	23.48	20.30	5,617	1.33	1.43	72
Class Y
October 31, 2017	$22.54	.41	3.77	4.18	(.54)	—	(.54)	—	$26.18	18.76	$247,071	.82	1.67	56
October 31, 2016	23.37	.40	.17	.57	(.55)	(.85)	(1.40)	—	22.54	2.71	189,190	.84^d	1.84^d	49
October 31, 2015	25.59	.32	(.92)	(.60)	(.58)	(1.04)	(1.62)	—	23.37	(2.57)	260,676	.81	1.30	67
October 31, 2014	23.56	.24	2.42	2.66	(.63)	—	(.63)	—	25.59	11.38	273,693	.81	.95	63
October 31, 2013	20.08	.42	3.72	4.14	(.66)	—	(.66)	—^e	23.56	20.93	196,399	.83	1.89	72

See notes to financial highlights at the end of this section.

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


36 Convertible Securities Fund	Convertible Securities Fund 37

Financial highlights cont.

^*Not annualized.

^†For the period March 3, 2015 (commencement of operations) to October 31, 2015.

^aPer share net investment income (loss) has been determined on the basis of the weighted average number of shares outstanding during the period.

^bTotal return assumes dividend reinvestment and does not reflect the effect of sales charges.

^cIncludes amounts paid through expense offset and/or brokerage/service arrangements, if any (Note 2). Also excludes acquired fund fees and expenses, if any.

^dReflects a voluntary waiver of certain fund expenses in effect during the period. As a result of such waivers, the expenses of each class reflect a reduction of less than 0.01% as a percentage of average net assets.

^eAmount represents less than $0.01 per share.

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

38 Convertible Securities Fund

Notes to financial statements 10/31/17

Within the following Notes to financial statements, references to “State Street” represent State Street Bank and Trust Company, references to “the SEC” represent the Securities and Exchange Commission, references to “Putnam Management” represent Putnam Investment Management, LLC, the fund’s manager, an indirect wholly-owned subsidiary of Putnam Investments, LLC and references to “OTC”, if any, represent over-the-counter. Unless otherwise noted, the “reporting period” represents the period from November 1, 2016 through October 31, 2017.

Putnam Convertible Securities Fund (the fund) is a Massachusetts business trust, which is registered under the Investment Company Act of 1940, as amended, as a diversified open-end management investment company. The objective of the fund is to seek, with equal emphasis, current income and capital appreciation. The fund’s secondary objective is conservation of capital. The fund invests mainly in convertible securities of U.S. companies. Under normal circumstances, the fund invests at least 80% of the fund’s net assets in convertible securities. This policy may be changed only after 60 days’ notice to shareholders. Convertible securities combine the investment characteristics of bonds and common stocks. Convertible securities include bonds, preferred stocks and other instruments that can be converted into or exchanged for common stock or equivalent value. A significant portion of the convertible securities the fund buys are below-investment-grade (sometimes referred to as “junk bonds”). The convertible bonds the fund buys usually have intermediate-to long-term stated maturities (i.e. three years or longer), but often contain “put” features, which allow bondholders to sell the bond back to the company under specified circumstances, that result in shorter effective maturities. When deciding whether to buy or sell investments, Putnam Management may consider, among other factors: (i) a security’s structural features, such as its position in a company’s capital structure and “put” and “call” features (a company’s right to repurchase the security under specified circumstances is a “call” feature); (ii) credit and prepayment risks; and (iii) with respect to a company’s common stock underlying a convertible security, the stock’s valuation and the company’s financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends.

The fund offers class A, class B, class C, class I, class M, class R and class Y shares. The fund registered class T shares in February 2017, however, as of the date of this report, class T shares had not commenced operations and are not available for purchase. Effective April 1, 2017, purchases of class B shares are closed to new and existing investors except by exchange from class B shares of another Putnam fund or through dividend and/or capital gains reinvestment. Class A and class M shares are sold with a maximum front-end sales charge of 5.75% and 3.50%, respectively. Class A shares generally are not subject to a contingent deferred sales charge, and class I, class M, class R and class Y shares are not subject to a contingent deferred sales charge. Class B shares, which convert to class A shares after approximately eight years, are not subject to a front-end sales charge and are subject to a contingent deferred sales charge if those shares are redeemed within six years of purchase. Class C shares are subject to a one-year 1.00% contingent deferred sales charge and do not convert to class A shares. Class R shares, which are not available to all investors, are sold at net asset value. The expenses for class A, class B, class C, class M and class R shares may differ based on the distribution fee of each class, which is identified in Note 2. Class I and class Y shares, which are sold at net asset value, are generally subject to the same expenses as class A, class B, class C, class M and class R shares, but do not bear a distribution fee and in the case of class I shares, bear a lower investor servicing fee, which is identified in Note 2. Class I and class Y shares are not available to all investors.

In the normal course of business, the fund enters into contracts that may include agreements to indemnify another party under given circumstances. The fund’s maximum exposure under these arrangements is unknown as this would involve future claims that may be, but have not yet been, made against the fund. However, the fund’s management team expects the risk of material loss to be remote.

The fund has entered into contractual arrangements with an investment adviser, administrator, distributor, shareholder servicing agent and custodian, who each provide services to the fund. Unless expressly stated otherwise, shareholders are not parties to, or intended beneficiaries of these contractual arrangements, and these contractual arrangements are not intended to create any shareholder right to enforce them against the service providers or to seek any remedy under them against the service providers, either directly or on behalf of the fund.

Under the fund’s Declaration of Trust, any claims asserted against or on behalf of the Putnam Funds, including claims against Trustees and Officers, must be brought in state and federal courts located within the Commonwealth of Massachusetts.

Convertible Securities Fund 39

Note 1: Significant accounting policies

The following is a summary of significant accounting policies consistently followed by the fund in the preparation of its financial statements. The preparation of financial statements is in conformity with accounting principles generally accepted in the United States of America and requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities in the financial statements and the reported amounts of increases and decreases in net assets from operations. Actual results could differ from those estimates. Subsequent events after the Statement of assets and liabilities date through the date that the financial statements were issued have been evaluated in the preparation of the financial statements.

Investment income, realized and unrealized gains and losses and expenses of the fund are borne pro-rata based on the relative net assets of each class to the total net assets of the fund, except that each class bears expenses unique to that class (including the distribution fees applicable to such classes). Each class votes as a class only with respect to its own distribution plan or other matters on which a class vote is required by law or determined by the Trustees. If the fund were liquidated, shares of each class would receive their pro-rata share of the net assets of the fund. In addition, the Trustees declare separate dividends on each class of shares.

Security valuation Portfolio securities and other investments are valued using policies and procedures adopted by the Board of Trustees. The Trustees have formed a Pricing Committee to oversee the implementation of these procedures and have delegated responsibility for valuing the fund’s assets in accordance with these procedures to Putnam Management. Putnam Management has established an internal Valuation Committee that is responsible for making fair value determinations, evaluating the effectiveness of the pricing policies of the fund and reporting to the Pricing Committee.

Investments for which market quotations are readily available are valued at the last reported sales price on their principal exchange, or official closing price for certain markets, and are classified as Level 1 securities under Accounting Standards Codification 820 Fair Value Measurements and Disclosures (ASC 820). If no sales are reported, as in the case of some securities that are traded OTC, a security is valued at its last reported bid price and is generally categorized as a Level 2 security.

Investments in open-end investment companies (excluding exchange-traded funds), if any, which can be classified as Level 1 or Level 2 securities, are valued based on their net asset value. The net asset value of such investment companies equals the total value of their assets less their liabilities and divided by the number of their outstanding shares.

Market quotations are not considered to be readily available for certain debt obligations (including short-term investments with remaining maturities of 60 days or less) and other investments; such investments are valued on the basis of valuations furnished by an independent pricing service approved by the Trustees or dealers selected by Putnam Management. Such services or dealers determine valuations for normal institutional-size trading units of such securities using methods based on market transactions for comparable securities and various relationships, generally recognized by institutional traders, between securities (which consider such factors as security prices, yields, maturities and ratings). These securities will generally be categorized as Level 2.

Many securities markets and exchanges outside the U.S. close prior to the scheduled close of the New York Stock Exchange and therefore the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the scheduled close of the New York Stock Exchange. Accordingly, on certain days, the fund will fair value certain foreign equity securities taking into account multiple factors including movements in the U.S. securities markets, currency valuations and comparisons to the valuation of American Depository Receipts, exchange-traded funds and futures contracts. The foreign equity securities, which would generally be classified as Level 1 securities, will be transferred to Level 2 of the fair value hierarchy when they are valued at fair value. The number of days on which fair value prices will be used will depend on market activity and it is possible that fair value prices will be used by the fund to a significant extent. Securities quoted in foreign currencies, if any, are translated into U.S. dollars at the current exchange rate.

To the extent a pricing service or dealer is unable to value a security or provides a valuation that Putnam Management does not believe accurately reflects the security’s fair value, the security will be valued at fair value by Putnam Management in accordance with policies and procedures approved by the Trustees. Certain investments, including certain restricted and illiquid securities and derivatives, are also valued at fair value following procedures approved by the Trustees. These valuations consider such factors as significant market or specific security events such as interest rate or credit quality changes, various relationships with other securities, discount rates, U.S. Treasury, U.S. swap and credit yields, index levels, convexity exposures, recovery rates, sales and other multiples and resale restrictions. These securities are classified as Level 2 or as Level 3 depending on the priority of the significant inputs.

40 Convertible Securities Fund

To assess the continuing appropriateness of fair valuations, the Valuation Committee reviews and affirms the reasonableness of such valuations on a regular basis after considering all relevant information that is reasonably available. Such valuations and procedures are reviewed periodically by the Trustees. The fair value of securities is generally determined as the amount that the fund could reasonably expect to realize from an orderly disposition of such securities over a reasonable period of time. By its nature, a fair value price is a good faith estimate of the value of a security in a current sale and does not reflect an actual market price, which may be different by a material amount.

Security transactions and related investment income Security transactions are recorded on the trade date (the date the order to buy or sell is executed). Gains or losses on securities sold are determined on the identified cost basis.

Interest income, net of any applicable withholding taxes, is recorded on the accrual basis. Dividend income, net of any applicable withholding taxes, is recognized on the ex-dividend date except that certain dividends from foreign securities, if any, are recognized as soon as the fund is informed of the ex-dividend date. Non-cash dividends, if any, are recorded at the fair value of the securities received. Dividends representing a return of capital or capital gains, if any, are reflected as a reduction of cost and/or as a realized gain.

All premiums/discounts are amortized/accreted on a yield-to-maturity basis.

Securities lending The fund may lend securities, through its agent, to qualified borrowers in order to earn additional income. The loans are collateralized by cash in an amount at least equal to the fair value of the securities loaned. The fair value of securities loaned is determined daily and any additional required collateral is allocated to the fund on the next business day. The remaining maturities of the securities lending transactions are considered overnight and continuous. The risk of borrower default will be borne by the fund’s agent; the fund will bear the risk of loss with respect to the investment of the cash collateral. Income from securities lending, net of expenses, is included in investment income on the Statement of operations. Cash collateral is invested in Putnam Cash Collateral Pool, LLC, a limited liability company managed by an affiliate of Putnam Management. Investments in Putnam Cash Collateral Pool, LLC are valued at its closing net asset value each business day. There are no management fees charged to Putnam Cash Collateral Pool, LLC. At the close of the reporting period, the fund received cash collateral of $18,807,175 and the value of securities loaned amounted to $18,396,410.

Interfund lending The fund, along with other Putnam funds, may participate in an interfund lending program pursuant to an exemptive order issued by the SEC. This program allows the fund to borrow from or lend to other Putnam funds that permit such transactions. Interfund lending transactions are subject to each fund’s investment policies and borrowing and lending limits. Interest earned or paid on the interfund lending transaction will be based on the average of certain current market rates. During the reporting period, the fund did not utilize the program.

Lines of credit The fund participates, along with other Putnam funds, in a $317.5 million unsecured committed line of credit and a $235.5 million unsecured uncommitted line of credit, both provided by State Street. Borrowings may be made for temporary or emergency purposes, including the funding of shareholder redemption requests and trade settlements. Interest is charged to the fund based on the fund’s borrowing at a rate equal to 1.25% plus the higher of (1) the Federal Funds rate and (2) the overnight LIBOR for the committed line of credit and the Federal Funds rate plus 1.30% for the uncommitted line of credit. A closing fee equal to 0.04% of the committed line of credit plus a $25,000 flat fee and 0.04% of the uncommitted line of credit has been paid by the participating funds. In addition, a commitment fee of 0.21% per annum on any unutilized portion of the committed line of credit is allocated to the participating funds based on their relative net assets and paid quarterly. During the reporting period, the fund had no borrowings against these arrangements.

Federal taxes It is the policy of the fund to distribute all of its taxable income within the prescribed time period and otherwise comply with the provisions of the Internal Revenue Code of 1986, as amended (the Code), applicable to regulated investment companies. It is also the intention of the fund to distribute an amount sufficient to avoid imposition of any excise tax under Section 4982 of the Code.

The fund is subject to the provisions of Accounting Standards Codification 740 Income Taxes (ASC 740). ASC 740 sets forth a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return. The fund did not have a liability to record for any unrecognized tax benefits in the accompanying financial statements. No provision has been made for federal taxes on income, capital gains or unrealized appreciation on securities held nor for excise tax on income and capital gains. Each of the fund’s federal tax returns for the prior three fiscal years remains subject to examination by the Internal Revenue Service.

Convertible Securities Fund 41

Distributions to shareholders Distributions to shareholders from net investment income are recorded by the fund on the ex-dividend date. Distributions from capital gains, if any, are recorded on the ex-dividend date and paid at least annually. The amount and character of income and gains to be distributed are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. These differences include temporary and/or permanent differences from losses on wash sale transactions, from nontaxable dividends, from amortization and accretion and from convertible security taxable income. Reclassifications are made to the fund’s capital accounts to reflect income and gains available for distribution (or available capital loss carryovers) under income tax regulations. At the close of the reporting period, the fund reclassified $3,196,074 to increase undistributed net investment income and $3,196,074 to decrease accumulated net realized gain.

Tax cost of investments includes adjustments to net unrealized appreciation (depreciation) which may not necessarily be final tax cost basis adjustments, but closely approximate the tax basis unrealized gains and losses that may be realized and distributed to shareholders. The tax basis components of distributable earnings and the federal tax cost as of the close of the reporting period were as follows:


Unrealized appreciation	$113,310,502
Unrealized depreciation	(29,481,210)
Net unrealized appreciation	83,829,292
Undistributed ordinary income	11,996,933
Undistributed long-term gain	14,092,284
Cost for federal income tax purposes	$653,587,422

Note 2: Management fee, administrative services and other transactions

The fund pays Putnam Management a management fee (based on the fund’s average net assets and computed and paid monthly) at annual rates that may vary based on the average of the aggregate net assets of all open-end mutual funds sponsored by Putnam Management (excluding net assets of funds that are invested in, or that are invested in by, other Putnam funds to the extent necessary to avoid “double counting” of those assets). Such annual rates may vary as follows:


0.780%	of the first $5 billion,	0.580%	of the next $50 billion,
0.730%	of the next $5 billion,	0.560%	of the next $50 billion,
0.680%	of the next $10 billion,	0.550%	of the next $100 billion and
0.630%	of the next $10 billion,	0.545%	of any excess thereafter.

For the reporting period, the management fee represented an effective rate (excluding the impact from any expense waivers in effect) of 0.625% of the fund’s average net assets.

Putnam Management has contractually agreed, through February 28, 2019, to waive fees or reimburse the fund’s expenses to the extent necessary to limit the cumulative expenses of the fund, exclusive of brokerage, interest, taxes, investment-related expenses, extraordinary expenses, acquired fund fees and expenses and payments under the fund’s investor servicing contract, investment management contract and distribution plans, on a fiscal year-to-date basis to an annual rate of 0.20% of the fund’s average net assets over such fiscal year-to-date period. During the reporting period, the fund’s expenses were not reduced as a result of this limit.

Putnam Investments Limited (PIL), an affiliate of Putnam Management, is authorized by the Trustees to manage a separate portion of the assets of the fund as determined by Putnam Management from time to time. PIL did not manage any portion of the assets of the fund during the reporting period. If Putnam Management were to engage the services of PIL, Putnam Management would pay a quarterly sub-management fee to PIL for its services at an annual rate of 0.35% of the average net assets of the portion of the fund managed by PIL.

The fund reimburses Putnam Management an allocated amount for the compensation and related expenses of certain officers of the fund and their staff who provide administrative services to the fund. The aggregate amount of all such reimbursements is determined annually by the Trustees.

Custodial functions for the fund’s assets are provided by State Street. Custody fees are based on the fund’s asset level, the number of its security holdings and transaction volumes.

42 Convertible Securities Fund

Putnam Investor Services, Inc., an affiliate of Putnam Management, provides investor servicing agent functions to the fund. Putnam Investor Services, Inc. received fees for investor servicing for class A, class B, class C, class M, class R and class Y shares that included (1) a per account fee for each direct and underlying non-defined contribution account (“retail account”) of the fund; (2) a specified rate of the fund’s assets attributable to defined contribution plan accounts; and (3) a specified rate based on the average net assets in retail accounts. Putnam Investor Services, Inc. has agreed that the aggregate investor servicing fees for each fund’s retail and defined contribution accounts for these share classes will not exceed an annual rate of 0.25% of the fund’s average assets attributable to such accounts.

Class I shares paid a monthly fee based on the average net assets of class I shares at an annual rate of 0.01%.

During the reporting period, the expenses for each class of shares related to investor servicing fees were as follows:


Class A	$556,828	Class M	5,088
Class B	11,788	Class R	6,761
Class C	63,536	Class Y	293,786
Class I	1	Total	$937,788

The fund has entered into expense offset arrangements with Putnam Investor Services, Inc. and State Street whereby Putnam Investor Services, Inc.’s and State Street’s fees are reduced by credits allowed on cash balances. The fund also reduced expenses through brokerage/service arrangements. For the reporting period, the fund’s expenses were reduced by $1,378 under the expense offset arrangements and by no monies under the brokerage/service arrangements.

Each Independent Trustee of the fund receives an annual Trustee fee, of which $515, as a quarterly retainer, has been allocated to the fund, and an additional fee for each Trustees meeting attended. Trustees also are reimbursed for expenses they incur relating to their services as Trustees.

The fund has adopted a Trustee Fee Deferral Plan (the Deferral Plan) which allows the Trustees to defer the receipt of all or a portion of Trustees fees payable on or after July 1, 1995. The deferred fees remain invested in certain Putnam funds until distribution in accordance with the Deferral Plan.

The fund has adopted an unfunded noncontributory defined benefit pension plan (the Pension Plan) covering all Trustees of the fund who have served as a Trustee for at least five years and were first elected prior to 2004. Benefits under the Pension Plan are equal to 50% of the Trustee’s average annual attendance and retainer fees for the three years ended December 31, 2005. The retirement benefit is payable during a Trustee’s lifetime, beginning the year following retirement, for the number of years of service through December 31, 2006. Pension expense for the fund is included in Trustee compensation and expenses in the Statement of operations. Accrued pension liability is included in Payable for Trustee compensation and expenses in the Statement of assets and liabilities. The Trustees have terminated the Pension Plan with respect to any Trustee first elected after 2003.

The fund has adopted distribution plans (the Plans) with respect to the following share classes pursuant to Rule 12b–1 under the Investment Company Act of 1940. The purpose of the Plans is to compensate Putnam Retail Management Limited Partnership, an indirect wholly-owned subsidiary of Putnam Investments, LLC, for services provided and expenses incurred in distributing shares of the fund. The Plans provide payments by the fund to Putnam Retail Management Limited Partnership at an annual rate of up to the following amounts (“Maximum %”) of the average net assets attributable to each class. The Trustees have approved payment by the fund at the following annual rate (“Approved %”) of the average net assets attributable to each class. During the reporting period, the class-specific expenses related to distribution fees were as follows:


	Maximum %	Approved %	Amount
Class A	0.35%	0.25%	$1,011,246
Class B	1.00%	1.00%	85,536
Class C	1.00%	1.00%	460,777
Class M	1.00%	0.75%	27,725
Class R	1.00%	0.50%	24,573
Total			$1,609,857

Convertible Securities Fund 43

For the reporting period, Putnam Retail Management Limited Partnership, acting as underwriter, received net commissions of $22,970 and $184 from the sale of class A and class M shares, respectively, and received $3,725 and $148 in contingent deferred sales charges from redemptions of class B and class C shares, respectively.

A deferred sales charge of up to 1.00% is assessed on certain redemptions of class A shares. For the reporting period, Putnam Retail Management Limited Partnership, acting as underwriter, received no monies on class A redemptions.

Note 3: Purchases and sales of securities

During the reporting period, the cost of purchases and the proceeds from sales, excluding short-term investments, were as follows:


	Cost of purchases	Proceeds from sales
Investments in securities (Long-term)	$369,957,928	$396,395,389
U.S. government securities (Long-term)	—	—
Total	$369,957,928	$396,395,389

The fund may purchase or sell investments from or to other Putnam funds in the ordinary course of business, which can reduce the fund’s transaction costs, at prices determined in accordance with SEC requirements and policies approved by the Trustees. During the reporting period, purchases or sales of long-term securities from or to other Putnam funds, if any, did not represent more than 5% of the fund’s total cost of purchases and/or total proceeds from sales.

Note 4: Capital shares

At the close of the reporting period, there were an unlimited number of shares of beneficial interest authorized. Transactions in capital shares were as follows:


	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class A	Shares	Amount	Shares	Amount
Shares sold	1,058,537	$25,681,287	1,286,491	$28,362,087
Shares issued in connection with
reinvestment of distributions	301,835	7,353,305	1,180,569	25,489,758
	1,360,372	33,034,592	2,467,060	53,851,845
Shares repurchased	(3,602,892)	(87,115,303)	(6,686,319)	(143,338,958)
Net decrease	(2,242,520)	$(54,080,711)	(4,219,259)	$(89,487,113)

	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class B	Shares	Amount	Shares	Amount
Shares sold	12,205	$279,839	42,602	$922,818
Shares issued in connection with
reinvestment of distributions	3,119	74,347	17,773	376,178
	15,324	354,186	60,375	1,298,996
Shares repurchased	(103,746)	(2,454,659)	(148,330)	(3,135,601)
Net decrease	(88,422)	$(2,100,473)	(87,955)	$(1,836,605)

44 Convertible Securities Fund


	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class C	Shares	Amount	Shares	Amount
Shares sold	90,389	$2,166,367	175,173	$3,770,151
Shares issued in connection with
reinvestment of distributions	17,488	420,724	112,921	2,409,648
	107,877	2,587,091	288,094	6,179,799
Shares repurchased	(731,352)	(17,436,163)	(1,146,332)	(24,471,301)
Net decrease	(623,475)	$(14,849,072)	(858,238)	$(18,291,502)

	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class I	Shares	Amount	Shares	Amount
Shares sold	—	$—	—	$—
Shares issued in connection with
reinvestment of distributions	10	248	27	578
	10	248	27	578
Shares repurchased	—	—	—	—
Net increase	10	$248	27	$578

	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class M	Shares	Amount	Shares	Amount
Shares sold	17,221	$408,113	10,515	$219,796
Shares issued in connection with
reinvestment of distributions	2,234	53,798	9,459	202,137
	19,455	461,911	19,974	421,933
Shares repurchased	(39,082)	(944,144)	(29,791)	(635,166)
Net decrease	(19,627)	$(482,233)	(9,817)	$(213,233)

	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class R	Shares	Amount	Shares	Amount
Shares sold	45,875	$1,107,333	58,758	$1,265,333
Shares issued in connection with
reinvestment of distributions	3,041	73,749	11,233	241,582
	48,916	1,181,082	69,991	1,506,915
Shares repurchased	(77,604)	(1,869,495)	(65,408)	(1,411,597)
Net increase (decrease)	(28,688)	$(688,413)	4,583	$95,318

	YEAR ENDED 10/31/17		YEAR ENDED 10/31/16
Class Y	Shares	Amount	Shares	Amount
Shares sold	3,202,852	$77,964,571	2,417,132	$52,513,689
Shares issued in connection with
reinvestment of distributions	151,237	3,692,655	480,361	10,367,362
	3,354,089	81,657,226	2,897,493	62,881,051
Shares repurchased	(2,308,877)	(55,700,964)	(5,660,259)	(121,971,476)
Net increase (decrease)	1,045,212	$25,956,262	(2,762,766)	$(59,090,425)

Convertible Securities Fund 45

At the close of the reporting period, Putnam Investments, LLC owned the following shares of the fund:


	Shares owned	Percentage of ownership	Value
Class I	439	100%	$11,494

Note 5: Affiliated transactions

Transactions during the reporting period with any company which is under common ownership or control were as follows:


					Shares
					outstanding
					and fair
	Fair value as	Purchase	Sale	Investment	value as
Name of affiliate	of 10/31/16	cost	proceeds	income	of 10/31/17
Short-term investments
Putnam Cash Collateral
Pool, LLC^*	$9,165,600	$149,790,459	$140,148,884	$115,971	$18,807,175
Putnam Short Term
Investment Fund^**	37,483,736	191,227,656	208,021,649	205,734	20,689,743
Total Short-term
investments	$46,649,336	$341,018,115	$348,170,533	$321,705	$39,496,918

^*No management fees are charged to Putnam Cash Collateral Pool, LLC. Investment income shown is included in securities lending income on the Statement of operations. There were no realized or unrealized gains or losses during the period.

^**Management fees charged to Putnam Short Term Investment Fund have been waived by Putnam Management. There were no realized or unrealized gains or losses during the period.

Note 6: Market, credit and other risks

In the normal course of business, the fund trades financial instruments and enters into financial transactions where risk of potential loss exists due to changes in the market (market risk) or failure of the contracting party to the transaction to perform (credit risk). The fund may be exposed to additional credit risk that an institution or other entity with which the fund has unsettled or open transactions will default. Investments in foreign securities involve certain risks, including those related to economic instability, unfavorable political developments, and currency fluctuations.

Note 7: Summary of derivative activity

The volume of activity for the reporting period for any derivative type that was held during the period is listed below and was based on an average of the holdings at the end of each fiscal quarter:


Warrants (number of warrants)	800

46 Convertible Securities Fund

The following is a summary of the fair value of derivative instruments as of the close of the reporting period:


Fair value of derivative instruments as of the close of the reporting period
	ASSET DERIVATIVES		LIABILITY DERIVATIVES
Derivatives not
accounted for as	Statement of		Statement of
hedging instruments	assets and		assets and
under ASC 815	liabilities location	Fair value	liabilities location	Fair value
Equity contracts	Investments	$8	Payables	$—
Total		$8		$—

The following is a summary of change in unrealized gains or losses of derivative instruments on the Statement of operations for the reporting period (Note 1) (there were no realized gains or losses on derivative instruments):


Change in unrealized appreciation or (depreciation) on derivatives recognized in net gain or (loss)
on investments
Derivatives not accounted for as
hedging instruments under ASC 815	Warrants	Total
Equity contracts	$—	$—
Total	$—	$—

Convertible Securities Fund 47

Federal tax information (Unaudited)

Pursuant to §852 of the Internal Revenue Code, as amended, the fund hereby designates $15,501,512 as a capital gain dividend with respect to the taxable year ended October 31, 2017, or, if subsequently determined to be different, the net capital gain of such year.

The fund designated 40.56% of ordinary income distributions as qualifying for the dividends received deduction for corporations.

For the reporting period, the fund hereby designates 41.42%, or the maximum amount allowable, of its taxable ordinary income distributions as qualified dividends taxed at the individual net capital gain rates.

For the reporting period, pursuant to §871(k) of the Internal Revenue Code, the fund hereby designates $5,940,103 of distributions paid as qualifying to be taxed as interest-related dividends, and no monies to be taxed as short-term capital gain dividends for nonresident alien shareholders.

The Form 1099 that will be mailed to you in January 2018 will show the tax status of all distributions paid to your account in calendar 2017.

48 Convertible Securities Fund

Officers

In addition to Robert L. Reynolds, the other officers of the fund are shown below:


Jonathan S. Horwitz (Born 1955)	Susan G. Malloy (Born 1957)
Executive Vice President, Principal Executive Officer,	Vice President and Assistant Treasurer
and Compliance Liaison	Since 2007
Since 2004	Head of Accounting, Middle Office, & Control Services,
	Putnam Investments and Putnam Management
Robert T. Burns (Born 1961)
Vice President and Chief Legal Officer	Mark C. Trenchard (Born 1962)
Since 2011	Vice President and BSA Compliance Officer
General Counsel, Putnam Investments,	Since 2002
Putnam Management, and Putnam Retail Management	Director of Operational Compliance, Putnam
	Investments and Putnam Retail Management
James F. Clark (Born 1974)
Vice President and Chief Compliance Officer	Nancy E. Florek (Born 1957)
Since 2016	Vice President, Director of Proxy Voting and Corporate
Chief Compliance Officer, Putnam Investments	Governance, Assistant Clerk, and Assistant Treasurer
and Putnam Management	Since 2000

Michael J. Higgins (Born 1976)	Denere P. Poulack (Born 1968)
Vice President, Treasurer, and Clerk	Assistant Vice President, Assistant Clerk,
Since 2010	and Assistant Treasurer
	Since 2004
Janet C. Smith (Born 1965)
Vice President, Principal Financial Officer, Principal
Accounting Officer, and Assistant Treasurer
Since 2007
Head of Fund Administration Services,
Putnam Investments and Putnam Management

The principal occupations of the officers for the past five years have been with the employers as shown above, although in some cases they have held different positions with such employers. The address of each officer is One Post Office Square, Boston, MA 02109.

Convertible Securities Fund 51

Services for shareholders

Investor services

Systematic investment plan Tell us how much you wish to invest regularly — weekly, semimonthly, or monthly — and the amount you choose will be transferred automatically from your checking or savings account. There’s no additional fee for this service, and you can suspend it at any time. This plan may be a great way to save for college expenses or to plan for your retirement.

Please note that regular investing does not guarantee a profit or protect against loss in a declining market. Before arranging a systematic investment plan, consider your financial ability to continue making purchases in periods when prices are low.

Systematic exchange You can make regular transfers from one Putnam fund to another Putnam fund. There are no additional fees for this service, and you can cancel or change your options at any time.

Dividends PLUS You can choose to have the dividend distributions from one of your Putnam funds automatically reinvested in another Putnam fund at no additional charge.

Free exchange privilege You can exchange money between Putnam funds free of charge, as long as they are the same class of shares. A signature guarantee is required if you are exchanging more than $500,000. The fund reserves the right to revise or terminate the exchange privilege.

Reinstatement privilege If you’ve sold Putnam shares or received a check for a dividend or capital gain, you may reinvest the proceeds with Putnam within 90 days of the transaction and they will be reinvested at the fund’s current net asset value — with no sales charge. However, reinstatement of class B shares may have special tax consequences. Ask your financial or tax representative for details.

Check-writing service You have ready access to many Putnam accounts. It’s as simple as writing a check, and there are no special fees or service charges. For more information about the check-writing service, call Putnam or visit our website.

Dollar cost averaging When you’re investing for long-term goals, it’s time, not timing, that counts. Investing on a systematic basis is a better strategy than trying to figure out when the markets will go up or down. This means investing the same amount of money regularly over a long period. This method of investing is called dollar cost averaging. When a fund’s share price declines, your investment dollars buy more shares at lower prices. When it increases, they buy fewer shares. Over time, you will pay a lower average price per share.

For more information

Visit the Individual Investors section at putnam.com A secure section of our website contains complete information on your account, including balances and transactions, updated daily. You may also conduct transactions, such as exchanges, additional investments, and address changes. Log on today to get your password.

Call us toll free at 1-800-225-1581 Ask a helpful Putnam representative or your financial advisor for details about any of these or other services, or see your prospectus.

52 Convertible Securities Fund

Fund information

Founded over 80 years ago, Putnam Investments was built around the concept that a balance between risk and reward is the hallmark of a well-rounded financial program. We manage over 100 funds across income, value, blend, growth, asset allocation, absolute return, and global sector categories.


Investment Manager	Trustees	Michael J. Higgins
Putnam Investment	Jameson A. Baxter, Chair	Vice President, Treasurer,
Management, LLC	Kenneth R. Leibler, Vice Chair	and Clerk
One Post Office Square	Liaquat Ahamed
Boston, MA 02109	Ravi Akhoury	Janet C. Smith
	Barbara M. Baumann	Vice President,
Investment Sub-Advisor	Katinka Domotorffy	Principal Financial Officer,
Putnam Investments Limited	Catharine Bond Hill	Principal Accounting Officer,
16 St James’s Street	Paul L. Joskow	and Assistant Treasurer
London, England SW1A 1ER	Robert E. Patterson
	George Putnam, III	Susan G. Malloy
Marketing Services	Robert L. Reynolds	Vice President and
Putnam Retail Management	Manoj P. Singh	Assistant Treasurer
One Post Office Square
Boston, MA 02109	Officers	Mark C. Trenchard
	Robert L. Reynolds	Vice President and
Custodian	President	BSA Compliance Officer
State Street Bank
and Trust Company	Jonathan S. Horwitz	Nancy E. Florek
	Executive Vice President,	Vice President, Director of
Legal Counsel	Principal Executive Officer,	Proxy Voting and Corporate
Ropes & Gray LLP	and Compliance Liaison	Governance, Assistant Clerk,
		and Assistant Treasurer
Independent Registered	Robert T. Burns
Public Accounting Firm	Vice President and	Denere P. Poulack
KPMG LLP	Chief Legal Officer	Assistant Vice President, Assistant
		Clerk, and Assistant Treasurer
	James F. Clark
	Vice President and
	Chief Compliance Officer

This report is for the information of shareholders of Putnam Convertible Securities Fund. It may also be used as sales literature when preceded or accompanied by the current prospectus, the most recent copy of Putnam’s Quarterly Performance Summary, and Putnam’s Quarterly Ranking Summary. For more recent performance, please visit putnam.com. Investors should carefully consider the investment objectives, risks, charges, and expenses of a fund, which are described in its prospectus. For this and other information or to request a prospectus or summary prospectus, call 1-800-225-1581 toll free. Please read the prospectus carefully before investing. The fund’s Statement of Additional Information contains additional information about the fund’s Trustees and is available without charge upon request by calling 1-800-225-1581.


Fiscal year ended	Audit Fees	Audit-Related Fees	Tax Fees	All Other Fees


October 31, 2017	$42,833	$ —	$4,675	$ —
October 31, 2016	$41,066	$ —	$4,550	$ —


Fiscal year ended	Audit-Related Fees	Tax Fees	All Other Fees	Total Non-Audit Fees

October 31, 2017	$ —	$ —	$ —	$ —

October 31, 2016	$ —	$ —	$ —	$ —


	CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES


	Exact name of registrant as specified in charter:	Putnam Convertible Securities Fund


	Address of principal executive offices:	One Post Office Square, Boston, Massachusetts 02109


	Name and address of agent for service:	Robert T. Burns, Vice President One Post Office Square Boston, Massachusetts 02109


	Copy to:	Bryan Chegwidden, Esq. Ropes & Gray LLP 1211 Avenue of the Americas New York, New York 10036


	Registrant's telephone number, including area code:	(617) 292-1000


	Date of reporting period :	November 1, 2016 — October 31, 2017


	The following is a copy of the report transmitted to stockholders pursuant to Rule 30e-1 under the Investment Company Act of 1940:


	The following table presents fees billed in each of the last two fiscal years for services rendered to the fund by the fund's independent auditor:


	For the fiscal years ended October 31, 2017 and October 31, 2016, the fund's independent auditor billed aggregate non-audit fees in the amounts of $4,765 and $4,550 respectively, to the fund, Putnam Management and any entity controlling, controlled by or under common control with Putnam Management that provides ongoing services to the fund.


	UNITED STATES SECURITIES AND EXCHANGE COMMISSION


	FORM N-CSR


	Item 1. Report to Stockholders:


	Audit Fees represent fees billed for the fund's last two fiscal years relating to the audit and review of the financial statements included in annual reports and registration statements, and other services that are normally provided in connection with statutory and regulatory filings or engagements.


	Audit-Related Fees represent fees billed in the fund's last two fiscal years for services traditionally performed by the fund's auditor, including accounting consultation for proposed transactions or concerning financial accounting and reporting standards and other audit or attest services not required by statute or regulation.


	Tax Fees represent fees billed in the fund's last two fiscal years for tax compliance, tax planning and tax advice services. Tax planning and tax advice services include assistance with tax audits, employee benefit plans and requests for rulings or technical advice from taxing authorities.


	All Other Fees represent fees billed for services relating to an analysis of fund profitability


	Pre-Approval Policies of the Audit, Compliance and Distributions Committee. The Audit, Compliance and Distributions Committee of the Putnam funds has determined that, as a matter of policy, all work performed for the funds by the funds' independent auditors will be pre-approved by the Committee itself and thus will generally not be subject to pre-approval procedures.


	The registrant's schedule of investments in unaffiliated issuers is included in the report to shareholders in Item 1 above.


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


	Item 8. Portfolio Managers of Closed-End Investment Companies


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


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


	(b) Changes in internal control over financial reporting: Not applicable


	(a)(1) The Code of Ethics of The Putnam Funds, which incorporates the Code of Ethics of Putnam Investments, is filed herewith.


	(a)(2) Separate certifications for the principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Investment Company Act of 1940, as amended, are filed herewith.


	(b) The certifications required by Rule 30a-2(b) under the Investment Company Act of 1940, as amended, are filed herewith.


	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.


	/s/ Janet C. Smith Janet C. Smith Principal Accounting Officer


	/s/ Jonathan S. Horwitz Jonathan S. Horwitz Principal Executive Officer