Supplement to the Fidelity Investments Money Market Funds (formerly Fidelity Institutional Money Market Funds) Class I June 10, 2016 Prospectus The following information supplements the information for Prime Money Market Portfolio found under the heading Principal Investment Strategies in the Fund Summary section. Although the fund is a money market fund, it will price and transact at a floating net asset value (NAV) that will fluctuate based on changes in the value of the fund s investments. The following information supplements the information for Prime Money Market Portfolio found under the heading Principal Investment Risks in the Fund Summary section. Floating NAV. The fund does not maintain a constant NAV per share of $1.00. The value of the fund s shares will be calculated to four decimal places and will vary as a result of changes in the value of the securities in which the fund invests. The following information replaces similar information for Prime Money Market Portfolio found under the heading Principal Investment Risks in the Fund Summary section. You could lose money by investing in the fund. Because the share price of the fund will fluctuate, when you sell your shares they may be worth more or less than what you originally paid for them. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. IMMI-16-05 1.480138.135 (PAGE 1 OF 6) September 30, 2016
The following information replaces similar information for Money Market Portfolio and Tax-Exempt Portfolio found under the heading Principal Investment Risks in the Fund Summary section. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares or may temporarily suspend your ability to sell shares if the fund s liquidity falls below required minimums because of market conditions or other factors. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. The following information replaces similar information for Money Market Portfolio and Tax-Exempt Portfolio found under the heading Purchase and Sale of Shares in the Fund Summary section. The fund is a retail money market fund. Shares of the fund are available only to accounts beneficially owned by natural persons. The fund may impose a fee upon the sale of fund shares or may temporarily suspend the ability to sell shares if the fund s liquidity falls below required minimums because of market conditions or other factors. The following information replaces similar information for Prime Money Market Portfolio found under the heading Purchase and Sale of Shares in the Fund Summary section. The fund is an institutional money market fund, which means that the net asset value (NAV) of the fund s shares will float, fluctuating with changes in the values of the fund s portfolio securities. The fund may impose a fee upon the sale of fund shares or may temporarily suspend the ability to sell shares if the fund s liquidity falls below required minimums because of market conditions or other factors. The following information replaces similar information for Prime Money Market Portfolio found under the heading Purchase and Sale of Shares in the Fund Summary section. Fidelity normally calculates a NAV for each class of shares of the fund each business day at 9:00 a.m. Eastern time and 3:00 p.m. Eastern time. The following information replaces similar information for Prime Money Market Portfolio found under the heading Principal Investment Strategies in the Fund Basics section. In buying and selling securities for the fund, the Adviser complies with industry-standard regulatory requirements for money market funds regarding the quality, maturity, liquidity, and diversification of the fund s investments. Although the fund is a money market fund, it will price and transact at a floating NAV that will fluctuate based on changes in the value of the fund s investments. (PAGE 2 OF 6)
The following information replaces similar information found under the heading Principal Investment Risks in the Fund Basics section. The following information supplements similar information found under the heading Valuing Shares in the Fund Basics section. Many factors affect each fund s performance. A fund s yield will change daily based on changes in interest rates and other market conditions. For example, a major increase in interest rates or a decrease in the credit quality of the issuer of one of the fund s investments could cause the fund s share price to decrease. Although each fund, with the exception of Prime Money Market Portfolio, is managed to maintain a stable $1.00 share price, there is no guarantee that the fund will be able to do so. It is important to note that neither share price nor yield is guaranteed by the U.S. Government. The following information supplements the information for Prime Money Market Portfolio found under the heading Principal Investment Risks in the Fund Basics section. Floating NAV. Prime Money Market Portfolio does not maintain a constant NAV per share of $1.00. Prime Money Market Portfolio s NAV will be calculated to four decimal places and will vary as a result of changes in the value of the securities in which the fund invests. The following information replaces similar information found under the heading Valuing Shares in the Fund Basics section. Each fund, except for Prime Money Market Portfolio, values its assets on the basis of amortized cost. The value of Prime Money Market Portfolio s shares will be calculated to four decimal places using basis point rounding (rounding to the nearest 1/100th of one percent). (PAGE 3 OF 6) For Prime Money Market Portfolio, NAV is calculated using the values of other open-end funds, if any, in which the fund invests (referred to as underlying funds). Shares of underlying funds are valued at their respective NAVs. Other assets are valued primarily on the basis of market quotations, official closing prices, or information furnished by a pricing service. Certain short-term securities are valued on the basis of amortized cost. If market quotations, official closing prices, or information furnished by a pricing service are not readily available or, in the Adviser s opinion, are deemed unreliable for a security, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. For example, if, in the Adviser s opinion, a security s value has been materially affected by events occurring before a fund s pricing time but after the close of the exchange or market on which the security is principally traded, then that security will be fair valued in good faith by the Adviser in accordance with applicable fair value pricing policies. Assets held by an underlying Fidelity money market fund may be valued on the basis of market quotations or amortized cost. Fair value pricing is based on subjective judgments and it is possible that the fair value of a security may differ materially from the value that would be realized if the security were sold.
The following information supplements information for Prime Money Market Portfolio found under the heading Additional Information about the Purchase and Sale of Shares in the Shareholder Information section. Effective September 1, 2016, Prime Money Market Portfolio will only offer same-day settlement for investors purchasing or redeeming shares of the fund. As a result, the following features will be implemented on the effective date: The fund will only permit transactions effected by electronic money movement through the Federal Reserve wire system. Other methods of transacting with the fund, such as electronic money movement through the Automated Clearing House, will not be permitted. Shares of the fund purchased by a wire order prior to the fund s NAV calculation time, with receipt of the wire in proper form before the close of the Federal Reserve Wire System on that day, generally will begin to earn dividends on the day of purchase. Shares of the fund redeemed by a wire order prior to the fund s NAV calculation time generally earn dividends through the day prior to the day of redemption. Shareholders of the fund will no longer have the privilege of exchanging their fund shares for shares of other Fidelity funds. Effective on the date that Prime Money Market Portfolio implements the floating NAV, Fidelity will normally calculate a NAV for each class of shares of the fund each business day at 9:00 a.m. Eastern time and 3:00 p.m. Eastern time. Shares of the fund purchased by a wire order prior to 3:00 p.m. Eastern time, with receipt of the wire in proper form before the close of the Federal Reserve Wire System on that day, generally will begin to earn dividends on the day of purchase. Shares of the fund redeemed by a wire order prior to 3:00 p.m. Eastern time generally earn dividends through the day prior to the day of redemption. The following information replaces similar information for Prime Money Market Portfolio found under the heading Additional Information about the Purchase and Sale of Shares in the Shareholder Information section. Prime Money Market Portfolio is an institutional money market fund, which means that the NAV of the fund s shares will float, fluctuating with changes in the values of the fund s portfolio securities. The fund may impose a fee upon the sale of fund shares or may temporarily suspend the ability to sell shares if the fund s liquidity falls below required minimums because of market conditions or other factors. (PAGE 4 OF 6)
The following information replaces the similar information found under the heading Frequent Purchases and Redemptions in the Shareholder Information section. Each fund has no limit on purchase or exchange transactions, to the extent exchange transactions are permitted by the fund, but may in its discretion restrict, reject, or cancel any purchases that, in the Adviser s opinion, may be disruptive to the management of the fund or otherwise not be in the fund s interests. The following information replaces the similar information found under the heading Price to Buy under the Buying Shares heading in the Shareholder Information section. Money Market Portfolio, Prime Money Market Portfolio and Tax-Exempt Portfolio may stop offering shares completely or may offer shares only on a limited basis, for a period of time or permanently, including, if applicable, periods when redemptions are suspended. The following information supplements the information for Money Market Portfolio, Prime Money Market Portfolio, and Tax-Exempt Portfolio found under the heading Selling Shares in the Shareholder Information section. Special Limitations Affecting Redemptions of Money Market Portfolio, Tax-Exempt Portfolio, and Prime Money Market Portfolio: Money Market Portfolio, Tax-Exempt Portfolio, and Prime Money Market Portfolio may impose liquidity fees and temporarily suspend redemptions based on the amount of fund assets that are weekly liquid assets. Weekly liquid assets generally include cash, direct obligations of the U.S. government, certain other U.S. government or agency securities, and securities that will mature or are subject to a demand feature that is exercisable and payable within five business days. If, at any time, the weekly liquid assets of Money Market Portfolio, Tax-Exempt Portfolio, or Prime Money Market Portfolio fall below 30% of total assets and the fund s Board of Trustees determines it is in the fund s best interests, the fund may, as early as the same day, impose a liquidity fee of no more than 2% and/or temporarily suspend redemptions for up to 10 business days in any 90 day period. (PAGE 5 OF 6)
If, at the end of any business day, the weekly liquid assets of Money Market Portfolio, Tax-Exempt Portfolio, or Prime Money Market Portfolio fall below 10% of total assets, the fund will impose a liquidity fee of 1% on all redemptions beginning on the next business day, unless the fund s Board of Trustees determines that imposing such a fee would not be in the fund s best interests or determines that a lower or higher fee (not to exceed 2%) would be in the fund s best interests. Any such fee would remain in effect until weekly liquid assets return to 30% or the fund s Board of Trustees determines that the fee is no longer in the fund s best interests. The Board of Trustees of Money Market Portfolio, Tax-Exempt Portfolio, or Prime Money Market Portfolio may determine that it would not be in the fund s best interests to continue operating if the fund s weekly liquid assets fall below 10% or under other circumstances. At which point, the fund may permanently suspend redemptions and liquidate. Liquidity fees are designed to transfer the costs of liquidating fund securities from shareholders who remain in the fund to those who leave the fund during periods when liquidity is scarce. The fees are payable to the fund and any fees charged to a shareholder will fully or partially offset the gain or increase the loss realized by that shareholder upon redemption. If liquidity fees are imposed or redemptions are suspended, Money Market Portfolio, Tax-Exempt Portfolio, and Prime Money Market Portfolio will notify shareholders on the fund s website or by press release. The following information replaces the similar information found under the heading Dividends and Capital Gain Distributions in the Shareholder Information section. Dividends declared for each of Government Portfolio, Money Market Portfolio, and Treasury Portfolio are based on estimates of income for the fund. Actual income may differ from estimates, and differences, if any, will be included in the calculation of subsequent dividends. The following information supplements the information found under the heading Tax Consequences in the Shareholder Information section. Redemptions, including exchanges, from Prime Money Market Portfolio may result in a capital gain or loss for federal tax purposes. A capital gain or loss on your investment in Prime Money Market Portfolio generally is the difference between the cost of your shares and the price you receive (net of any liquidity fees imposed) when you sell them. (PAGE 6 OF 6)
Fidelity Investments Money Market Funds (formerly Fidelity Institutional Money Market Funds) Government Portfolio Class/Ticker I/FIGXX Money Market Portfolio Class/Ticker I/FMPXX Prime Money Market Portfolio Class/Ticker I/FIDXX Tax Exempt Portfolio Class/Ticker I/FTCXX Treasury Only Portfolio Class/Ticker I/FSIXX Treasury Portfolio Class/Ticker I/FISXX Prospectus June 10, 2016 Like securities of all mutual funds, these securities have not been approved or disapproved by the Securities and Exchange Commission, and the Securities and Exchange Commission has not determined if this prospectus is accurate or complete. Any representation to the contrary is a criminal offense. 245 Summer Street, Boston, MA 02210
Contents Fund Summary 3 Government Portfolio 7 Money Market Portfolio 12 Prime Money Market Portfolio 17 Tax-Exempt Portfolio 22 Treasury Only Portfolio 26 Treasury Portfolio Fund Basics 30 Investment Details 36 Valuing Shares Shareholder Information 37 Additional Information about the Purchase and Sale of Shares 40 Converting Shares 41 Exchanging Shares 41 Account Features and Policies 43 Dividends and Capital Gain Distributions 44 Tax Consequences Fund Services 46 Fund Management 47 Fund Distribution Appendix 49 Financial Highlights Prospectus 2
Fund Summary Fund/Class: Government Portfolio/I Investment Objective The fund seeks to obtain as high a level of current income as is consistent with the preservation of principal and liquidity within the limitations prescribed for the fund. Shareholder fees (fees paid directly from your investment) Fee Table The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. None Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment) Management fee 0.14% Distribution and/or Service (12b-1) fees Other expenses 0.07% Total annual operating expenses 0.21% Fee waiver and/or expense reimbursement (a) 0.03% Total annual operating expenses after fee waiver and/or expense reimbursement 0.18% (a) Fidelity Management & Research Company (FMR) has contractually agreed to reimburse Class I of the fund to the extent that total operating expenses (excluding interest, certain taxes, certain securities lending costs, brokerage commissions, extraordinary expenses, and acquired fund fees and expenses, if any), as a percentage of its average net assets, exceed 0.18%. This arrangement will remain in effect through May 31, 2017. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees. This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let s say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the None effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here s how much you would pay in total 3 Prospectus
Fund Summary continued expenses if you sell all of your shares at the end of each time period indicated: 1 year $ 18 3 years $ 64 5 years $ 115 10 years $ 264 Principal Investment Strategies Normally investing at least 99.5% of total assets in cash, U.S. Government securities and/or repurchase agreements that are collateralized fully (i.e., collateralized by cash or government securities). Investing in U.S. Government securities issued by entities that are chartered or sponsored by Congress but whose securities are neither issued nor guaranteed by the U.S. Treasury. Investing in compliance with industrystandard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments. In addition, the fund normally invests at least 80% of its assets in U.S. Government securities and repurchase agreements for those securities. Principal Investment Risks Interest Rate Changes. Interest rate increases can cause the price of a money market security to decrease. Issuer-Specific Changes. A decline in the credit quality of an issuer or a provider of credit support or a maturity-shortening structure for a security can cause the price of a money market security to decrease. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. The fund will not impose a fee upon the sale of your shares, nor temporarily suspend your ability to sell shares if the fund s weekly liquid assets fall below 30% of its total assets because of market conditions or other factors. Performance The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund s shares from year to year. Past performance is not an indication of future performance. Prospectus 4
Visit www.fidelity.com or www.advisor. fidelity.com for more recent performance information. Year-by-Year Returns Calendar Years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 4.94% Percentage (%) 5.13% 2.44% 0.34% 0.06% 0.01% 0.01% 0.01% 0.01% 0.01% 10 0-10 During the periods shown in the chart: Returns Quarter ended Highest Quarter Return 1.30% December 31, 2006 Lowest Quarter Return 0.00% March 31, 2015 Year-to-Date Return 0.05% March 31, 2016 Average Annual Returns Past 1 Past 5 Past 10 For the periods ended December 31, 2015 year years years Class I 0.01% 0.01% 1.28% Investment Adviser Fidelity Management & Research Company (FMR) (the Adviser) is the fund s manager. Fidelity Investments Money Management, Inc. (FIMM) and other investment advisers serve as subadvisers for the fund. investment professional. You may buy or sell shares in various ways: Internet www.fidelity.com or www.advisor.fidelity.com Phone To reach a Fidelity representative 1-877-297-2952 Purchase and Sale of Shares You may buy or sell shares through a retirement account or through an 5 Prospectus
Fund Summary continued Mail Fidelity Investments P.O. Box 770002 Cincinnati, OH 45277-0081 Overnight Express: Fidelity Investments 100 Crosby Parkway Covington, KY 41015 The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form. The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form. The fund is open for business each day the New York Stock Exchange (NYSE) is open. Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund s portfolio instruments are open, and the fund s management believes there is an adequate market to meet purchase and redemption requests. Fidelity normally calculates NAV each business day as of 4:00 p.m. Eastern time and, when the New York Fed and principal bond markets are open, as of 5:00 p.m. Eastern time. The fund s assets normally are valued as of these times for the purpose of computing NAV. Class I has a minimum initial investment of $1 million, which may be waived if your aggregate balance in the Fidelity Investments Money Market Funds is greater than $10 million. The fund may waive or lower purchase minimums in other circumstances. Tax Information Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account). Payments to Broker-Dealers and Other Financial Intermediaries The fund, the Adviser, Fidelity Distributors Corporation (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary s web site for more information. Prospectus 6
Fund Summary Fund/Class: Money Market Portfolio/I Investment Objective The fund seeks to obtain as high a level of current income as is consistent with the preservation of principal and liquidity within the limitations prescribed for the fund. Shareholder fees (fees paid directly from your investment) Fee Table The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. None Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment) Management fee 0.14% Distribution and/or Service (12b-1) fees Other expenses 0.07% Total annual operating expenses 0.21% Fee waiver and/or expense reimbursement (a) 0.03% Total annual operating expenses after fee waiver and/or expense reimbursement 0.18% (a) Fidelity Management & Research Company (FMR) has contractually agreed to reimburse Class I of the fund to the extent that total operating expenses (excluding interest, certain taxes, certain securities lending costs, brokerage commissions, extraordinary expenses, and acquired fund fees and expenses, if any), as a percentage of its average net assets, exceed 0.18%. This arrangement will remain in effect through May 31, 2017. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees. This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let s say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the None effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here s how much you would pay in total 7 Prospectus
Fund Summary continued expenses if you sell all of your shares at the end of each time period indicated: 1 year $ 18 3 years $ 64 5 years $ 115 10 years $ 264 Principal Investment Strategies Investing in U.S. dollar-denominated money market securities of domestic and foreign issuers, U.S. Government securities, and repurchase agreements. Potentially entering into reverse repurchase agreements. Investing more than 25% of total assets in the financial services industries. Investing in compliance with industrystandard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments. Principal Investment Risks Interest Rate Changes. Interest rate increases can cause the price of a money market security to decrease. Foreign Exposure. Entities located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries. Financial Services Concentration. Changes in government regulation and interest rates and economic downturns can have a significant negative effect on issuers in the financial services sector, including the price of their securities or their ability to meet their payment obligations. Issuer-Specific Changes. A decline in the credit quality of an issuer or a provider of credit support or a maturityshortening structure for a security can cause the price of a money market security to decrease. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. Performance The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund s shares from year to year. Past performance is not an indication of future performance. Prospectus 8
Visit www.fidelity.com or www.advisor. fidelity.com for more recent performance information. Year-by-Year Returns Calendar Years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 5.03% Percentage (%) 10 5.32% 3.05% 0.73% 0.24% 0.16% 0.18% 0.08% 0.05% 0.11% 0-10 During the periods shown in the chart: Returns Quarter ended Highest Quarter Return 1.34% September 30, 2007 Lowest Quarter Return 0.01% March 31, 2014 Year-to-Date Return 0.08% March 31, 2016 Average Annual Returns Past 1 Past 5 Past 10 For the periods ended December 31, 2015 year years years Class I 0.11% 0.12% 1.48% Investment Adviser Fidelity Management & Research Company (FMR) (the Adviser) is the fund s manager. Fidelity Investments Money Management, Inc. (FIMM) and other investment advisers serve as subadvisers for the fund. Purchase and Sale of Shares The fund has been designated a retail money market fund, which means that it limits investments to accounts beneficially owned by natural persons. The fund is not yet subject to liquidity fees, nor the temporary suspension of redemptions. The fund expects to implement these features by October 2016. Effective after the close of business on December 31, 2015, new positions in the fund established through Fidelity brokerage or mutual fund accounts that are not beneficially owned by natural persons, as determined by the fund, may no longer 9 Prospectus
Fund Summary continued be opened. For more information, see the Additional Information about the Purchase and Sale of Shares section of the prospectus. The fund will involuntarily redeem accounts that are not beneficially owned by natural persons, as determined by the fund, in order to implement the fund s eligibility requirements as a retail money market fund. Shares held by these accounts will be sold at their net asset value per share calculated on the day that the fund closes the account position. You may buy or sell shares through a retirement account or through an investment professional. You may buy or sell shares in various ways: Internet www.fidelity.com or www.advisor.fidelity.com Phone To reach a Fidelity representative 1-877-297-2952 Mail Fidelity Investments P.O. Box 770002 Cincinnati, OH 45277-0081 Overnight Express: Fidelity Investments 100 Crosby Parkway Covington, KY 41015 The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form. The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form. The fund is open for business each day the New York Stock Exchange (NYSE) is open. Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund s portfolio instruments are open, and the fund s management believes there is an adequate market to meet purchase and redemption requests. Fidelity normally calculates NAV each business day as of 4:00 p.m. Eastern time and, when the New York Fed and principal bond markets are open, as of 5:00 p.m. Eastern time. The fund s assets normally are valued as of these times for the purpose of computing NAV. Class I has a minimum initial investment of $1 million, which may be waived if your aggregate balance in the Fidelity Investments Money Market Funds is greater than $10 million. The fund may waive or lower purchase minimums in other circumstances. Tax Information Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account). Payments to Broker-Dealers and Other Financial Intermediaries The fund, the Adviser, Fidelity Distributors Corporation (FDC), and/or their affiliates may pay intermediaries, Prospectus 10
which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary s web site for more information. 11 Prospectus
Fund Summary Fund/Class: Prime Money Market Portfolio/I Investment Objective The fund seeks to obtain as high a level of current income as is consistent with the preservation of principal and liquidity within the limitations prescribed for the fund. Shareholder fees (fees paid directly from your investment) Fee Table The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. None Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment) Management fee 0.14% Distribution and/or Service (12b-1) fees Other expenses 0.07% Total annual operating expenses 0.21% Fee waiver and/or expense reimbursement (a) 0.03% Total annual operating expenses after fee waiver and/or expense reimbursement 0.18% (a) Fidelity Management & Research Company (FMR) has contractually agreed to reimburse Class I of the fund to the extent that total operating expenses (excluding interest, certain taxes, certain securities lending costs, brokerage commissions, extraordinary expenses, and acquired fund fees and expenses, if any), as a percentage of its average net assets, exceed 0.18%. This arrangement will remain in effect through May 31, 2017. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees. This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let s say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the None effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here s how much you would pay in total Prospectus 12
expenses if you sell all of your shares at the end of each time period indicated: 1 year $ 18 3 years $ 64 5 years $ 115 10 years $ 264 Principal Investment Strategies Investing in U.S. dollar-denominated money market securities of domestic and foreign issuers, U.S. Government securities, and repurchase agreements. Potentially entering into reverse repurchase agreements. Investing more than 25% of total assets in the financial services industries. Investing in compliance with industrystandard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments. Principal Investment Risks Interest Rate Changes. Interest rate increases can cause the price of a money market security to decrease. Foreign Exposure. Entities located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries. Financial Services Concentration. Changes in government regulation and interest rates and economic downturns can have a significant negative effect on issuers in the financial services sector, including the price of their securities or their ability to meet their payment obligations. Issuer-Specific Changes. A decline in the credit quality of an issuer or a provider of credit support or a maturityshortening structure for a security can cause the price of a money market security to decrease. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. Performance The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund s shares from year to year. Past performance is not an indication of future performance. 13 Prospectus
Fund Summary continued Visit www.fidelity.com or www.advisor. fidelity.com for more recent performance information. Year-by-Year Returns Calendar Years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 5.01% Percentage (%) 10 5.28% 2.95% 0.58% 0.19% 0.11% 0.11% 0.02% 0.01% 0.08% 0-10 During the periods shown in the chart: Returns Quarter ended Highest Quarter Return 1.33% September 30, 2007 Lowest Quarter Return 0.00% March 31, 2014 Year-to-Date Return 0.09% March 31, 2016 Average Annual Returns Past 1 Past 5 Past 10 For the periods ended December 31, 2015 year years years Class I 0.08% 0.07% 1.41% Investment Adviser Fidelity Management & Research Company (FMR) (the Adviser) is the fund s manager. Fidelity Investments Money Management, Inc. (FIMM) and other investment advisers serve as subadvisers for the fund. Purchase and Sale of Shares The fund has been designated an institutional money market fund, which means that the net asset value (NAV) of the fund s shares will float, fluctuating with changes in the values of the fund s portfolio securities. The fund is not yet subject to liquidity fees, nor the temporary suspension of redemptions. The fund expects to implement the floating NAV, as well as liquidity fees and temporary suspension of redemptions, by October 2016. You may buy or sell shares through a retirement account or through an Prospectus 14
investment professional. You may buy or sell shares in various ways: Internet www.fidelity.com or www.advisor.fidelity.com Phone To reach a Fidelity representative 1-877-297-2952 Mail Fidelity Investments P.O. Box 770002 Cincinnati, OH 45277-0081 Overnight Express: Fidelity Investments 100 Crosby Parkway Covington, KY 41015 The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form. The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form. The fund is open for business each day the New York Stock Exchange (NYSE) is open. Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund s portfolio instruments are open, and the fund s management believes there is an adequate market to meet purchase and redemption requests. Fidelity normally calculates NAV each business day as of 4:00 p.m. Eastern time and, when the New York Fed and principal bond markets are open, as of 5:00 p.m. Eastern time. The fund s assets normally are valued as of these times for the purpose of computing NAV. Effective on the date that the fund implements the floating NAV, Fidelity will normally calculate a NAV for each class of shares of the fund each business day at 9:00 a.m. Eastern time and 3:00 p.m. Eastern time. Class I has a minimum initial investment of $1 million, which may be waived if your aggregate balance in the Fidelity Investments Money Market Funds is greater than $10 million. The fund may waive or lower purchase minimums in other circumstances. Tax Information Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account). Payments to Broker-Dealers and Other Financial Intermediaries The fund, the Adviser, Fidelity Distributors Corporation (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional 15 Prospectus
Fund Summary continued or visit your intermediary s web site for more information. Prospectus 16
Fund Summary Fund/Class: Tax-Exempt Portfolio/I Investment Objective The fund seeks to obtain as high a level of interest income exempt from federal income tax as is consistent with liquidity and stability of principal. Shareholder fees (fees paid directly from your investment) Fee Table The following table describes the fees and expenses that may be incurred when you buy and hold shares of the fund. None Annual Operating Expenses (expenses that you pay each year as a % of the value of your investment) Management fee 0.14% Distribution and/or Service (12b-1) fees Other expenses 0.08% Total annual operating expenses 0.22% Fee waiver and/or expense reimbursement (a) 0.04% Total annual operating expenses after fee waiver and/or expense reimbursement 0.18% (a) Fidelity Management & Research Company (FMR) has contractually agreed to reimburse Class I of the fund to the extent that total operating expenses (excluding interest, certain taxes, certain securities lending costs, brokerage commissions, extraordinary expenses, and acquired fund fees and expenses, if any), as a percentage of its average net assets, exceed 0.18%. This arrangement will remain in effect through May 31, 2017. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees. This example helps compare the cost of investing in the fund with the cost of investing in other funds. Let s say, hypothetically, that the annual return for shares of the fund is 5% and that your shareholder fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not None meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here s how much you would pay in total 17 Prospectus
Fund Summary continued expenses if you sell all of your shares at the end of each time period indicated: 1 year $ 18 3 years $ 66 5 years $ 119 10 years $ 276 Principal Investment Strategies Effective June 30, 2016, normally investing in municipal money market securities. Prior to that date, normally investing in municipal money market securities rated in the highest category by at least one nationally recognized rating service or in one of the two highest categories by another rating service if rated by more than one, or, if unrated, determined to be of equivalent quality to the highest category by Fidelity Management & Research Company (FMR). Prior to June 30, 2016, normally not investing in any rated security that is rated in the second highest short-term rating category by Standard & Poor s (S&P) or Moody s Investors Service (Moody s) (beginning June 30, 2016, this investment strategy is no longer in effect). Normally investing at least 80% of assets in municipal securities whose interest is exempt from federal income tax. Normally not investing in municipal securities whose interest is subject to the federal alternative minimum tax. Potentially investing more than 25% of total assets in municipal securities that finance similar types of projects. Investing in compliance with industrystandard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments. Principal Investment Risks Municipal Market Volatility. The municipal market is volatile and can be significantly affected by adverse tax, legislative, or political changes and the financial condition of the issuers of municipal securities. Interest Rate Changes. Interest rate increases can cause the price of a money market security to decrease. Foreign Exposure. Entities providing credit support or a maturity-shortening structure that are located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries. Issuer-Specific Changes. A decline in the credit quality of an issuer or a provider of credit support or a maturityshortening structure for a security can Prospectus 18
cause the price of a money market security to decrease. You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund s sponsor, have no legal obligation to provide financial support to the fund, and you should not expect that the sponsor will provide financial support to the fund at any time. Performance The following information is intended to help you understand the risks of investing in the fund. The information illustrates the changes in the performance of the fund s shares from year to year. Past performance is not an indication of future performance. Visit www.fidelity.com or www.advisor. fidelity.com for more recent performance information. Year-by-Year Returns Calendar Years 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 3.31% Percentage (%) 10 3.53% 2.05% 0.25% 0.08% 0.03% 0.01% 0.02% 0.03% 0.08% 0-10 During the periods shown in the chart: Returns Quarter ended Highest Quarter Return 0.90% June 30, 2007 Lowest Quarter Return 0.00% March 31, 2014 Year-to-Date Return 0.01% March 31, 2016 Average Annual Returns For the periods ended December 31, 2015 Past 1 year Past 5 years Past 10 years Class I 0.08% 0.03% 0.93% 19 Prospectus
Fund Summary continued Investment Adviser FMR (the Adviser) is the fund s manager. Fidelity Investments Money Management, Inc. (FIMM) and other investment advisers serve as sub-advisers for the fund. Purchase and Sale of Shares The fund has been designated a retail money market fund, which means that it limits investments to accounts beneficially owned by natural persons. The fund is not yet subject to liquidity fees, nor the temporary suspension of redemptions. The fund expects to implement these features by October 2016. Effective after the close of business on December 31, 2015, new positions in the fund established through Fidelity brokerage or mutual fund accounts that are not beneficially owned by natural persons, as determined by the fund, may no longer be opened. For more information, see the Additional Information about the Purchase and Sale of Shares section of the prospectus. The fund will involuntarily redeem accounts that are not beneficially owned by natural persons, as determined by the fund, in order to implement the fund s eligibility requirements as a retail money market fund. Shares held by these accounts will be sold at their net asset value per share calculated on the day that the fund closes the account position. You may buy or sell shares through an investment professional. You may buy or sell shares in various ways: Internet www.fidelity.com or www.advisor.fidelity.com Phone To reach a Fidelity representative 1-877-297-2952 Mail Fidelity Investments P.O. Box 770002 Cincinnati, OH 45277-0081 Overnight Express: Fidelity Investments 100 Crosby Parkway Covington, KY 41015 The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form. The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form. The fund is open for business each day the New York Stock Exchange (NYSE) is open. Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund s portfolio instruments are open, and the fund s management believes there is an adequate market to meet purchase and redemption requests. Class I has a minimum initial investment of $1 million, which may be waived if your aggregate balance in the Fidelity Investments Money Market Funds is greater than $10 million. The fund may waive or lower purchase minimums in other circumstances. Prospectus 20
Tax Information The fund seeks to earn income and pay dividends exempt from federal income tax. Income exempt from federal income tax may be subject to state or local tax. A portion of the dividends you receive may be subject to federal and state income taxes. You may also receive taxable distributions attributable to the fund s sale of municipal bonds. Payments to Broker-Dealers and Other Financial Intermediaries The fund, the Adviser, Fidelity Distributors Corporation (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary s web site for more information. 21 Prospectus