Exhibit 99.1 

CUSIP NO. 011642105 13 G

AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that only one statement containing the information required by Schedule 13G need be filed with respect to the ownership by each of the undersigned of Common Stock of Alarm.com Holdings, Inc.

Dated: February 16, 2021

By:	/s/ Stephen Trundle
	Stephen Trundle
STEPHEN TRUNDLE 2015 GIFT TRUST
BY:	W. Scott Trundle III
ITS:	Trustee
By:	/s/ W. Scott Trundle III
	W. Scott Trundle III, Trustee
BACKBONE PARTNERS, LLC
BY:	Stephen Trundle
ITS:	Sole Member
By:	/s/ Stephen Trundle
	Stephen Trundle
FOOTINGS ADVANCEMENT TRUST
BY:	Miles Padgett
ITS:	Trustee
By:	/s/ Miles Padgett
	Miles Padgett, Trustee