Strategy. The Fund invests, under normal circumstances, at least 80% of its assets in a diversified portfolio of domestic equity securities of mid cap companies. Equity securities include common stock and any rights to purchase common stock. Assets means net assets, plus the amount of borrowings for investment purposes. Shareholders will be given 60 days advance notice of any change to this policy. For these purposes, the Boston Trust Walden Inc. (the Adviser) defines mid cap companies as those with market capitalizations within the range encompassed by the Russell Midcap Index at the time of purchase. The size of companies in the Russell Midcap Index may change with market conditions. In addition, changes to the composition of the Russell Midcap Index … Show more… The Fund invests, under normal circumstances, at least 80% of its assets in a diversified portfolio of domestic equity securities of mid cap companies. Equity securities include common stock and any rights to purchase common stock. Assets means net assets, plus the amount of borrowings for investment purposes. Shareholders will be given 60 days advance notice of any change to this policy. For these purposes, the Boston Trust Walden Inc. (the Adviser) defines mid cap companies as those with market capitalizations within the range encompassed by the Russell Midcap Index at the time of purchase. The size of companies in the Russell Midcap Index may change with market conditions. In addition, changes to the composition of the Russell Midcap Index can change the market capitalization range of the companies included in the index. As of December 31, 2024, the market capitalization range of the Russell Midcap Index was between $355 million and $172 billion. However, the Fund generally excludes securities with market capitalization less than $2 billion at time of purchase. ESG Integration: As part of the investment decision-making process for the Fund, the Adviser evaluates how financially material environmental, social, and governance (ESG) risks and opportunities may affect a companys revenues, expenses, assets, liabilities, and overall risk. The consideration of ESG risks and opportunities in investment decision-making is referred to as ESG integration. The Adviser considers financial materiality as it is understood in Generally Accepted Accounting Principles information that would influence the judgment of an informed investor. The integration of ESG risks and opportunities is often a subjective exercise and may differ depending upon the characteristics of the asset class. The Adviser focuses active ownership efforts in three areas: climate risk, equality, and governance, seeking to ensure companies held across investment strategies are appropriately managing material and significant risks and opportunities. Active ownership activities include proxy voting, company engagement, shareholder resolutions, and public policy advocacy. The Fund is not subject to ESG Screening. Show less