X0303 4 2010-09-13 0 0001244937 ENERNOC INC ENOC 0001399291 Healy Timothy G C/O ENERNOC, INC., 101 FEDERAL STREET, SUITE 1100 BOSTON MA 02110 1 1 0 0 Chairman & CEO Common Stock 2010-09-13 4 S 0 12500 33.57 D 592739 D Common Stock 60204 I By the Timothy G. Healy Grantor Retained Annuity Trust dated March 26, 2009 The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 16, 2009. This transaction was executed in multiple trades at prices ranging from $33.19 to $33.97 per share. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The shares are owned directly by the Timothy G. Healy Grantor Retained Annuity Trust dated March 26, 2009 and indirectly by the Reporting Person as the grantor. /s/ Garrett Winslow, Attorney-in-Fact 2010-09-15