Disciplined Growth holds 3.27M Alarm.com shares (ALRM) — 6.6% stake

Rhea-AI Filing Summary

Alarm.com Holdings ownership disclosure: Disciplined Growth Investors, Inc. reports beneficial ownership of 3,268,986 shares of Alarm.com common stock, representing 6.6% of the class as reported. The filing shows sole voting power over 3,063,375 shares and sole dispositive power over 3,268,986 shares. The statement is signed by the filer’s Chief Operating & Compliance Officer on 05/15/2026.

Insights

Institutional Ownership Analyst

Large passive stake disclosed by an investment manager.

Disciplined Growth Investors reports beneficial ownership of 3,268,986 shares (6.6%) in Alarm.com, with sole dispositive authority. The filing is an amendment to a Schedule 13G and reflects reported holdings rather than a transaction description.

The economic exposure and voting profile are explicit in the filing; cash‑flow treatment and any purchase dates or acquisition prices are not provided in the excerpt.

Key Figures

Beneficial ownership: 3,268,986 shares Percent of class: 6.6% Sole voting power: 3,063,375 shares +2 more

5 metrics

Beneficial ownership 3,268,986 shares reported on Schedule 13G/A

Percent of class 6.6% percentage of common stock reported

Sole voting power 3,063,375 shares sole power to vote or direct the vote

Sole dispositive power 3,268,986 shares sole power to dispose or direct disposition

Signature date 05/15/2026 filing signed by Chief Operating & Compliance Officer

Key Terms

Schedule 13G/A, beneficially owned, sole dispositive power, CUSIP

4 terms

Schedule 13G/A regulatory

"Amendment No. 6 ) Alarm.com Holdings, Inc."

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.

beneficially owned financial

"Amount beneficially owned: 3,268,986"

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 dispositive power financial

"Sole power to dispose or to direct the disposition of: 3,268,986"

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.

CUSIP regulatory

"CUSIP No.: 011642105"

A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

Alarm.com Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

011642105

(CUSIP Number)

03/31/2026

(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): 011642105

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 3,063,375.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,268,986.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,268,986.00

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)

6.6 %

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.: 011642105
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: 3,268,986
(b)	Percent of class: 6.6%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,063,375
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 3,268,986
	(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:	05/15/2026

FAQ

What stake does Disciplined Growth Investors hold in Alarm.com (ALRM)?

Disciplined Growth Investors holds 3,268,986 shares, equal to 6.6%. The Schedule 13G/A lists sole voting power over 3,063,375 shares and sole dispositive power over 3,268,986 shares as reported.

Does the filing indicate Disciplined Growth plans to sell ALRM shares?

The filing does not state any planned sales or purchases. It reports current beneficial ownership and voting/dispositive powers; no transaction dates, proceeds, or sale intentions are provided in the excerpt.

What is the relevant reporting date for the ownership figures?

The ownership figures are presented with a header date of 03/31/2026 and the amendment is signed on 05/15/2026. These dates anchor the reported share counts in the filing excerpt.

Who signed the Schedule 13G/A for Disciplined Growth Investors?

Peter G. Rieke, Chief Operating & Compliance Officer, signed the amendment. The signature line in the excerpt shows the date 05/15/2026 next to his name and title.

What voting and disposition powers are disclosed by the filer?

The filer reports sole power to vote 3,063,375 shares and sole dispositive power over 3,268,986 shares. Shared voting and shared dispositive powers are reported as zero in the excerpt.