*The Fund was ranked by total return against 934, 802, 667, and 389 large-capitalization domestic core equity funds, for the 1-, 3-, 5-, and 10-year periods, respectively, as defined by Lipper. **A "1" represents the top 20% of the category based on total return, and a "5" represents the bottom 20%.

Past performance is no guarantee of future results. The Fund's returns quoted above represent past performance after all expenses. Investment return, principal value, and yield will fluctuate so that an investor's shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance data quoted. For performance information current to the most recent quarter and month-end, visit our website or call 1-800-582-6757. Each fund charges a 2.00% redemption fee on sales or exchanges of shares made less than 30 days after the settlement of purchase or acquisition through exchange, with certain exceptions. See the Fund's current prospectus for further information.

For the period reported in its current prospectus, during which net operating expenses were capped by the Fund's Manager, the Fund's gross annual operating expenses totaled 1.31% of net assets. Until November 30, 2010, the Fund's Manager has contractually agreed to waive certain fees and/or reimburse certain expenses, including management fees, so that expenses paid by the Fund will not exceed, on a per annum basis, 1.25% of its average daily net assets representing Investor shares.

High double digit returns are attributable, in part, to unusually favorable market conditions and may not be repeated or consistently achieved in the future.

Domini Social Equity Fund Outperforms More Than 90% of Large Cap Core Equity in Lipper Ranking for Year Ended March 31, 2010

New York, NY - April 29, 2010 - Domini Social Investments announced today that the Domini Social Equity Fund (Nasdaq: DSEFX) returned 57.29% for the year ended March 31, 2010. The Fund's return outpaced the S&P 500's return of 49.77% by more than 7%.

"It was a great year for making money while making a difference," said Amy Domini, Founder and CEO of Domini Social Investments.

"We want to especially highlight that this is another positive result from our four-year working relationship with Wellington Management Company, whose quantitative approach dovetails nicely with our own analytical approach to social and environmental standard-setting."

Domini and Wellington have developed a unique and exciting relationship to create and deliver investment portfolios to meet the needs of responsible investors. Domini applies its proprietary social and environmental analysis to create an investable universe. Wellington Management Company then applies its quantitative modeling techniques to construct the portfolio. Domini then engages with companies in its fund portfolios through proxy voting and more direct forms of shareholder activism.

The Domini Social Equity Fund was founded in 1991 by Amy Domini, author or coauthor of numerous books and articles on the subject of investing within a values framework. Her most recent book has been translated into Japanese, Korean, and Chinese, a tribute to her pioneering work to bring finance into the business of building a better world for our children. She was recently honored by Time magazine as one of 25 "Responsibility Pioneers" who are changing the world.

About Domini Social Investments

Domini Social Investments manages a global family of mutual funds for individual and institutional investors seeking to create positive change in society by integrating social and environmental standards into their investment decisions. Please visit www.domini.com for more information.  

The performance information quoted above does not reflect the deduction of taxes that a shareholder would pay on distributions or the redemption of Fund shares. Total return is based on the Fund's net asset values and assumes all dividends and capital gains were reinvested. An investment in the Fund is subject to market risks and is not insured. You may lose money. Certain fees payable by the Fund were waived during the period, and the Fund's average annual total returns would have been lower had these not been waived.

The Standard & Poor's 500 Index (S&P 500) is an unmanaged index of common stocks. Investors cannot invest directly in the S&P 500.

You should consider the Domini Funds' investment objectives, risks, charges, and expenses carefully before investing. View or call 1-800-582-6757 to receive a copy of the Funds' current prospectus for more complete information on these and other topics. Please read the prospectus carefully before investing or sending money.

DSIL Investment Services LLC, Distributor. 04/10

Domini Funds, P.O. Box 9785, Providence, RI 02940