UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

 Exchange Act of 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

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☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

Green Century Funds

(Name of Registrant as Specified in Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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4) Date Filed: June 12, 2020

June 2020

URGENT

Re:  Your investment in:

Green Century Balanced Fund

Dear Shareholder,

Broadridge Financial Solutions has been engaged by Green Century Balanced Fund to contact you regarding an important matter pertaining to your investment in the Fund.

Our previous attempts to contact you have been unsuccessful.  Accordingly, please contact us immediately at 1-800-574-6218 Monday through Friday between the hours of 9:00am to 10:00pm Eastern Time.

This matter is very important and will take only a moment of your time.

Thank you in advance for your assistance with this matter.

Sincerely,

Michael Collins

Vice President and General Manager