Alarm.com holder plans $2.9M stock sale

Alarm.com Holdings, Inc. (ALRM) is the issuer in a planned sale of shares by affiliated person Stephen Trundle under Rule 144.

Rhea-AI Filing Summary

Alarm.com Holdings, Inc. (ALRM) is the issuer in a planned sale of shares by affiliated person Stephen Trundle under Rule 144. Trundle has filed to sell 50,000 shares of common stock through Morgan Stanley Smith Barney LLC on or after 08/24/2026, following a cash stock option exercise on the same date. The filing lists an aggregate market value of $2,883,575.00 for these shares and notes 49,090,228 shares outstanding. In the prior three months, Trundle sold 6,073 shares for $265,847.40 on 05/26/2026.

Key Figures

Shares to be sold: 50,000 shares of common stock Aggregate market value of planned sale: $2,883,575.00 Shares outstanding: 49,090,228 shares +4 more

7 metrics

Shares to be sold 50,000 shares of common stock Planned Rule 144 sale by Stephen Trundle on or after 08/24/2026

Aggregate market value of planned sale $2,883,575.00 Value of 50,000 ALRM shares to be sold

Shares outstanding 49,090,228 shares Alarm.com Holdings, Inc. common stock outstanding as stated in the notice

Shares sold in past 3 months 6,073 shares Common shares sold by Stephen Trundle on 05/26/2026

Proceeds from past 3-month sale $265,847.40 Total consideration for 6,073 shares sold on 05/26/2026

Proposed sale date 08/24/2026 Date listed for proposed Rule 144 sale of 50,000 shares

Stock option exercise date 08/24/2026 Date of cash stock option exercise to acquire 50,000 shares from issuer

Key Terms

Rule 144, Stock Option Exercise, Securities To Be Sold, Securities Sold During The Past 3 Months

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Common | 08/24/2026 | Stock Option Exercise | Issuer"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Securities To Be Sold financial

"144: Securities To Be Sold"

Securities Sold During The Past 3 Months financial

"144: Securities Sold During The Past 3 Months"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ALRM shares does Stephen Trundle plan to sell under this Rule 144 notice?

Stephen Trundle plans to sell 50,000 shares of Alarm.com Holdings, Inc. common stock. The shares are to be sold through Morgan Stanley Smith Barney LLC, with the proposed sale date of 08/24/2026 and an aggregate market value listed as $2,883,575.00.

What is the aggregate market value of the ALRM shares to be sold by Stephen Trundle?

The aggregate market value of the 50,000 ALRM shares that Stephen Trundle plans to sell is reported as $2,883,575.00. These are common shares of Alarm.com Holdings, Inc. proposed to be sold on or after 08/24/2026.

When are the ALRM shares expected to be sold and how will they be acquired?

The shares are expected to be sold on or after 08/24/2026. They are to be acquired via a Stock Option Exercise from the issuer, with the option exercise and acquisition of the 50,000 shares also dated 08/24/2026, paid in cash.

Has Stephen Trundle sold any ALRM shares in the past three months?

Yes. Over the past three months, Stephen Trundle sold 6,073 shares of Alarm.com common stock on 05/26/2026, for total proceeds of $265,847.40. This prior sale is disclosed alongside the planned 50,000-share sale in the notice.

How many Alarm.com (ALRM) shares are outstanding according to this filing?

The filing states that there are 49,090,228 shares outstanding of Alarm.com Holdings, Inc. common stock. This figure provides context for the size of the planned 50,000-share sale reported by Stephen Trundle under Rule 144.

Through which broker will the ALRM Rule 144 sale for Stephen Trundle be executed?

The proposed Rule 144 sale for Stephen Trundle will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York, NY. The securities are Alarm.com common stock listed on NASDAQ.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/24/2026 - 05:36 PM EDT Accepted by SEC EDGAR 08/24/2026 - 05:36 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001643898
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ALARM.COM HOLDINGS, INC.
SEC File Number	001-37461
Address of Issuer	8281 Greensboro Drive Suite 100 Tysons VIRGINIA 22102
Phone	(877) 389-4033
Name of Person for Whose Account the Securities are To Be Sold	STEPHEN TRUNDLE
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	50000	2883575.00	49090228	08/24/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/24/2026	Stock Option Exercise	Issuer			50000	08/24/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
STEPHEN TRUNDLE 8281 Greensboro Drive Suite 100 Tysons VA 22102	Common	05/26/2026	6073	265847.40

144: Remarks and Signature

Remarks
Date of Notice	08/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/22/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Stephen S Trundle
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)