X0609 4 2026-03-18 0001459200 Alarm.com Holdings, Inc. ALRM 0001184810 NEVIN DARIUS G C/O ALARM.COM HOLDINGS, INC. 8281 GREENSBORO DRIVE, SUITE 100 TYSONS VA 22102 true false false false true Common Stock 2026-03-18 4 M false 36000 21.7 A 60375 D Common Stock 2026-03-18 4 S false 36000 46.17 D 24375 D Common Stock 2500 I By: G3 Investment Holdings, LLC Stock Option (Right to Buy) 21.7 2026-03-18 4 M false 36000 0 D 2026-05-14 Common Stock 36000 0 D These sales were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person on 12/16/2024. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.83 - $46.65, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4. These securities are directly held by G3 Investment Holdings, LLC ("G3 Investments"). The Reporting Person is a co-owner of G3 Investments, and shares voting and dispositive power over the securities held by G3 Investments. The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein. Immediately exercisable and fully vested. /s/ Daniel Ramos, Attorney-in-Fact 2026-03-19