Disciplined Growth Investors (ALRM) discloses 7.3% Alarm.com stake

Rhea-AI Filing Summary

Disciplined Growth Investors, Inc. reports beneficial ownership of 3,585,614 shares of Alarm.com Holdings, Inc. common stock, representing 7.3% of the class as of June 30, 2026. The firm has sole voting power over 3,377,527 shares and sole dispositive power over all 3,585,614 shares, with no shared voting or dispositive authority.

Key Figures

Beneficial ownership: 3,585,614 shares Percent of class: 7.3% Sole voting power: 3,377,527 shares +3 more

6 metrics

Beneficial ownership 3,585,614 shares Alarm.com common stock beneficially owned by Disciplined Growth Investors as of June 30, 2026

Percent of class 7.3% Portion of Alarm.com common stock class beneficially owned

Sole voting power 3,377,527 shares Shares for which Disciplined Growth Investors has sole power to vote or direct the vote

Shared voting power 0 shares Shares with shared power to vote or direct the vote

Sole dispositive power 3,585,614 shares Shares for which Disciplined Growth Investors has sole power to dispose or direct disposition

Shared dispositive power 0 shares Shares with shared power to dispose or direct disposition

Key Terms

beneficially owned, sole voting power, sole dispositive power, Schedule 13G/A, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 3,585,614"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"(i) Sole power to vote or to direct the vote: 3,377,527"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"(iii) Sole power to dispose or to direct the disposition of: 3,585,614"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13G/A regulatory

"form_type": "SCHEDULE 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

percent of class financial

"(b) | Percent of class: 7.3%"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

How many Alarm.com (ALRM) shares does Disciplined Growth Investors beneficially own?

Disciplined Growth Investors beneficially owns 3,585,614 shares of Alarm.com common stock. This stake reflects its reported holdings with sole dispositive power over all shares and sole voting power over most of them as of June 30, 2026.

What percentage of Alarm.com (ALRM) is owned by Disciplined Growth Investors?

Disciplined Growth Investors reports owning 7.3% of Alarm.com’s common stock. This percentage is based on its beneficial ownership of 3,585,614 shares, as disclosed in the Schedule 13G/A amendment dated June 30, 2026.

Does Disciplined Growth Investors share voting power over Alarm.com (ALRM) shares?

No, Disciplined Growth Investors reports sole voting power over 3,377,527 Alarm.com shares and zero shared voting power. It also reports no shared dispositive power, indicating exclusive authority over its reported position.

What is the sole dispositive power reported for Alarm.com (ALRM) shares?

Disciplined Growth Investors reports sole dispositive power over 3,585,614 shares of Alarm.com common stock. This means it alone has authority to decide whether to sell or otherwise dispose of these shares, with no shared dispositive authority.

Who signed the Schedule 13G/A filing for Alarm.com (ALRM)?

The filing was signed by Peter G. Rieke, Chief Operating & Compliance Officer of Disciplined Growth Investors. His signature on August 14, 2026 certifies the accuracy of the reported ownership information for Alarm.com common stock.

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Available on EDGAR 08/14/2026 - 03:33 PM Accepted by SEC EDGAR 08/14/2026 - 03:33 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 7)

Alarm.com Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

167519886

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 167519886

1

Names of Reporting Persons

DISCIPLINED GROWTH INVESTORS INC /MN

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MINNESOTA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,377,527.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,585,614.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,585,614.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Alarm.com Holdings, Inc.
(b)	Address of issuer's principal executive offices: 8281 GREENSBORO DRIVE, 8281 GREENSBORO DRIVE, TYSONS, VIRGINIA, 22102.
Item 2.
(a)	Name of person filing: Disciplined Growth Investors, Inc.
(b)	Address or principal business office or, if none, residence: 150 South Fifth Street Suite 2550 Minneapolis, MN 55402
(c)	Citizenship: Minnesota, USA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 167519886
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 3,585,614
(b)	Percent of class: 7.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,377,527
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 3,585,614
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

DISCIPLINED GROWTH INVESTORS INC /MN

Signature:	Peter G. Rieke
Name/Title:	Chief Operating & Compliance Officer
Date:	08/14/2026