Putnam Investments
 
Putnam Prime Money Market Fund
Prospectus »     Fact sheet »

Announcement on Putnam Prime Money Market Fund's distribution plan (PDF)

Objective
The fund seeks to provide as high a rate of current income as we believe is consistent with preservation of capital, and maintenance of liquidity.

Strategy
The fund seeks to:
> provide investors with a high rate of current income;
> preserve capital;
> provide stability of principal and
> maintain liquidity.

The fund emphasizes high-quality, short-term investments and seeks to protect principal by attempting to maintain a stable net asset value of $1.00 per share while providing investors with easy access to the assets in the account.

Credit rating/approval
S&P -- AAAm
Moody's -- Aaa
Fitch -- AAA/V1+
NAIC -- Approved

Investment management team
Fixed Income Money Market
Joanne M. Driscoll (Portfolio Leader)
Jonathan Topper (Portfolio Member)

Fund Facts as of August 31, 2008
Fiscal year end   September
Category   Taxable Income
Product status   Open to new investors
Dividend frequency   Monthly
Total net assets   $15,439,719,339
Number of issues   74
Turnover
as of fiscal year end
  N/A

Class Inception Quotron CUSIP
I May 6, 2004 PPMXX 746763432


Money market funds are not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the fund seeks to maintain a constant share price of $1, it is possible to lose money by investing in this fund.

Money market ratings are an assessment of the safety of invested principal and the ability to maintain a stable market value of the fund's shares. Ratings are based on an evaluation of several factors, including credit quality, diversification, and maturity of assets in the portfolio, as well as management strength and operational capabilities. Ratings are subject to change and do not remove market risk. Ratings are as of September 30, 2006.

Investors should carefully consider the investment objectives, risks, charges, and expenses of the fund carefully before investing. For a prospectus containing this and other information about the fund, please click on the link above. Read it carefully before making any investment decisions.