Total

Putnam Ultra Short MAC Series

Fund summary

Goal

Putnam Ultra Short MAC Series seeks as high a rate of current income as Putnam Investment Management, LLC (“Putnam Management”) believes is consistent with preservation of capital and maintenance of liquidity.

Fees and expenses

The following tables describe the fees and expenses you may pay if you buy, hold, and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	Putnam Ultra Short MAC Series -
Maximum Deferred Sales Charge (as a percentage of Offering Price)	none
Maximum Deferred Sales Charge (as a percentage)	none

Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)

April 4, 2026

Annual Fund Operating Expenses	Putnam Ultra Short MAC Series -
Management fees	none	[1]
Distribution and Service (12b-1) Fees	none
Other Expenses (as a percentage of Assets):	0.11%	[2]
Expenses (as a percentage of Assets)	0.11%
Fee Waiver or Reimbursement	(0.11%)	[3]
Net Expenses (as a percentage of Assets)	none

Example

The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund’s operating expenses remain the same. Your actual costs may be higher or lower.

Expense Example	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years
Putnam Ultra Short MAC Series | - | USD ($)	none	none

Portfolio turnover

The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher turnover rate may indicate higher transaction costs and may result in higher taxes when the fund’s shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund’s turnover rate will be available after the fund completes its first fiscal year.

Investments, risks, and performance

Investments

The fund was established exclusively for use within separately managed accounts (“SMAs”). The fund is used in combination with selected individual securities to implement the SMA’s investment program.

We invest in a diversified portfolio of fixed income securities comprised of short duration, investment-grade money market and other fixed income securities. The fund’s investments may include obligations of the U.S. government, its agencies and instrumentalities, which are backed by the full faith and credit of the United States (e.g., U.S. Treasury bonds and Ginnie Mae mortgage-backed bonds) or by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae or Freddie Mac mortgage-backed bonds), domestic corporate debt obligations, taxable municipal debt securities, securitized debt instruments (such as mortgage- and asset-backed securities), repurchase agreements, certificates of deposit, bankers acceptances, commercial paper (including asset-backed commercial paper), time deposits, Yankee Eurodollar securities and other money market instruments. We may also invest in U.S. dollar-denominated foreign securities of these types. Under normal circumstances, the effective duration of the fund’s portfolio will generally not be greater than one year. Effective duration provides a measure of a fund’s interest-rate sensitivity. The longer a fund’s duration, the more sensitive the fund is to shifts in interest rates. Under normal circumstances, the dollar-weighted average portfolio maturity of the fund is not expected to exceed four years.

We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell investments.

Risks

It is important to understand that you can lose money by investing in the fund.

The effects of inflation may erode the value of your investment over time. The value of investments in the fund's portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific issuer, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity in the fund's portfolio holdings, may negatively impact the fund's performance, and may exacerbate other risks to which the fund is subject.

The risks associated with fixed income investments include interest rate risk, which is the risk that the value of the fund’s investments is likely to fall if interest rates rise. Fixed income investments are also subject to credit risk, which is the risk that the issuer of a fixed income investment may default on payment of interest or principal. Credit risk is generally greater for debt not backed by the full faith and credit of the U.S. government, and interest rate risk is generally greater for longer-term debt. Fixed income investments may be more susceptible to downgrades or defaults during economic downturns or other periods of economic stress. Mortgage-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with less attractive terms and yields. The fund’s investments in mortgage-backed securities, and in certain other securities and derivatives, may be or become illiquid.

International investments, particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments (such as the risk of seizure by a foreign government, the imposition of currency or other restrictions, or high levels of inflation), and may be or become illiquid.

The fund is intended to be a component of an SMA strategy in managed account investment programs sponsored by third-party financial institutions. A program sponsor’s clients may, alone or in the aggregate, have substantial investments in the fund. If a program sponsor decides to remove the strategy as an available option for its program participants or to cease investing in the fund to implement the strategy, or if a large program client decides to terminate its managed account, the fund may experience relatively large redemptions and could be required to liquidate some or all of its assets at inopportune times or unfavorable prices. The liquidation of fund assets at inopportune times or unfavorable prices may increase or accelerate taxable gains or

transaction costs, may negatively affect the fund’s net asset value, performance, or ability to satisfy redemptions in a timely manner, and could cause the value of your investment to decline.

There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund’s other service providers, may experience disruptions or operating errors that could negatively impact the fund. The fund may not achieve its goal, and it is not intended to be a complete investment program. An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

Performance information will be available after the fund completes a full calendar year of operation.

Putnam Ultra Short MAC Series | Risk Lose Money [Member]

It is important to understand that you can lose money by investing in the fund.

Putnam Ultra Short MAC Series | Risk Not Insured Depository Institution [Member]

An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

[1] The investment adviser does not charge a management fee to the fund. Shareholders should be aware, however, that the fund is part of separately managed account investment programs, and the investment adviser will be compensated directly or indirectly by wrap program sponsors or wrap account clients for separately managed account advisory services. 

[2] Other expenses are based on estimated amounts for the current fiscal year.

[3] Reflects Putnam Management’s contractual obligation to limit certain fund expenses through at least April 4, 2026. This obligation may be modified or discontinued only with approval of the Board of Trustees.