Stephen Trundle - 24 Aug 2026 Form 4 Insider Report for Alarm.com Holdings, Inc. (ALRM)

Reporting relationship: Chief Executive Officer, Director
Issuer ticker: ALRM
Reported as of: 24 Aug 2026
Net transaction value: -$2,883,500
SEC form: 4
Accepted by SEC: 25 Aug 2026, 17:43:23 UTC
Prior SEC filing: 28 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Ramos, Attorney-in-Fact

Key filing fact

Stephen Trundle filed Form 4 for Alarm.com Holdings, Inc. (ALRM) on 25 Aug 2026.

Key facts

This page summarizes Stephen Trundle's Form 4 filing for Alarm.com Holdings, Inc. (ALRM).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 25 Aug 2026, 17:43.

Change

Previous filing in this sequence was filed on 28 May 2026.
Current net transaction value: -$2,883,500.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001643898 Primary reporting owner

Trundle Stephen

Relationship: Chief Executive Officer, Director
Address: C/O ALARM.COM HOLDINGS, INC., 8281 GREENSBORO DRIVE SUITE 100, TYSONS
Signature: /s/ Daniel Ramos, Attorney-in-Fact
Signature date: 25 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ALRM transaction

Common Stock

Options Exercise

Transaction value
Shares: +50,000
Change %: +15%
Price: $32.17^*
Shares after: 374,842
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1

ALRM transaction

Common Stock

Sale

Transaction value: $2,883,500
Shares: -50,000
Change %: -13%
Price: $57.67
Shares after: 324,842
Date: 24 Aug 2026
Ownership: Direct
Footnotes: F1, F2

ALRM holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,315,343
Date: 24 Aug 2026
Ownership: By LLC
Footnotes: F3

ALRM holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 259,687
Date: 24 Aug 2026
Ownership: By Gift Trust
Footnotes: F4

ALRM holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 9,862
Date: 24 Aug 2026
Ownership: By Footings Advancement Trust
Footnotes: F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ALRM transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -50,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 50,000
Exercise price: $32.17
Footnotes: F1, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 6 footnotes

Footnote F1

This exercise and the corresponding sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2026.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $57.245 - $58.13, 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.

Footnote F3

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.

Footnote F4

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.

Footnote F5

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.

Footnote F6

Immediately exercisable and fully vested.