X0609 4 2026-09-02 0001459200 Alarm.com Holdings, Inc. ALRM 0001643898 Trundle Stephen false C/O ALARM.COM HOLDINGS, INC. 8281 GREENSBORO DRIVE SUITE 100 TYSONS VA 22102 true true false false Chief Executive Officer false Common Stock 2026-09-02 4 G false 2000 0 D 322842 D Common Stock 1315343 I By LLC Common Stock 259687 I By Gift Trust Common Stock 9862 I By Footings Advancement Trust Represents a bona fide charitable contribution to a donor advised fund. No shares were sold by the Reporting Person. These shares are owned by Backbone Partners, LLC ("Backbone"). The Reporting Person has the sole power to vote and dispose of the shares held by Backbone. The Reporting Person disclaims beneficial ownership of the shares owned by Backbone except to the extent, if any, of his pecuniary interest therein. These shares are owned by the Stephen Trundle 2015 Gift Trust (the "Trust"). Certain members of the Reporting Person's immediate family are beneficiaries of the Trust. The Reporting Person disclaims beneficial ownership of the shares owned by the Trust except to the extent, if any, of his pecuniary interest therein. These shares are owned by the Footings Advancement Trust (the "Advancement Trust"). The Reporting Person has the sole power to vote and dispose of the shares held by the Advancement Trust and certain members of the Reporting Person's immediate family are beneficiaries. The Reporting Person disclaims beneficial ownership of the shares owned by the Advancement Trust except to the extent, if any, of his pecuniary interest therein. /s/ Daniel Ramos, Attorney-in-Fact 2026-09-04