X0306 4 2020-06-02 0 0001459200 Alarm.com Holdings, Inc. ALRM 0001304655 Valenzuela Steve C/O ALARM.COM HOLDINGS, INC. 8281 GREENSBORO DRIVE, SUITE 100 TYSONS VA 22102 0 1 0 0 Chief Financial Officer Common Stock 2020-06-02 4 M 0 2000 27.90 A 49931 D Common Stock 2020-06-02 4 S 0 2000 51.00 D 47931 D Common Stock 2020-06-03 4 M 0 3500 27.90 A 51431 D Common Stock 2020-06-03 4 M 0 416 37.94 A 51847 D Common Stock 2020-06-03 4 S 0 3916 53.86 D 47931 D Employee Stock Option (Right to Buy) 27.90 2020-06-02 4 M 0 2000 0.00 D 2026-11-14 Common Stock 2000 21917 D Employee Stock Option (Right to Buy) 27.90 2020-06-03 4 M 0 3500 0.00 D 2026-11-14 Common Stock 3500 18417 D Employee Stock Option (Right to Buy) 37.94 2020-06-03 4 M 0 416 0.00 D 2030-03-31 Common Stock 416 12084 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.5895 - $54.15, 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. The shares underlying the option exercised in this transaction were fully vested and exercisable. The remainder of the shares underlying the option shall continue to vest and become exercisable ratably on a monthly basis on the first day of each month through November 1, 2021, subject to the Reporting Person's continued service with the Issuer through each such date. The shares underlying the option exercised in this transaction were fully vested and exercisable. The remainder of the shares underlying the option shall continue to vest and become exercisable ratably on a monthly basis on the first day of each month through May 1, 2025, subject to the Reporting Person's continued service with the Issuer through each such date. /s/ Daniel Ramos, Attorney-in-Fact 2020-06-04