Stephen Trundle

CIK: 0001643898

Transaction Breakdown

Open Market Buys (P)4 (23.5%)

High conviction signal

Open Market Sales (S)8 (47.1%)

Position reduction

Option Exercises (M)2 (11.8%)

Derivative conversions

Awards (A)2 (11.8%)

Compensation grants

Other (G, F, J, C, D, …)1 (5.9%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ALRM

Alarm.com Holdings, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (17 total)

ALRM
Alarm.com Holdings, Inc.
Sep 2, 2026
Gift(G)
Direct
2K shares-
ALRM
Alarm.com Holdings, Inc.
Aug 24, 2026
Exercise(M)
Direct
50K shares at avg. $32.17$1.6M
ALRM
Alarm.com Holdings, Inc.
Aug 24, 2026
Sale(S)
Direct
50K shares at avg. $57.67$2.9M
ALRM
Alarm.com Holdings, Inc.
May 26, 2026
Sale(S)
Direct
6.1K shares at avg. $43.78$266K
ALRM
Alarm.com Holdings, Inc.
May 18, 2026
Sale(S)
Direct
2.9K shares at avg. $43.56$128K
ALRM
Alarm.com Holdings, Inc.
Apr 8, 2026
Award(A)
Direct
65K shares-
ALRM
Alarm.com Holdings, Inc.
Nov 20, 2025
Purchase(P)
Indirect
100 shares at avg. $48.66$5K
ALRM
Alarm.com Holdings, Inc.
Nov 20, 2025
Purchase(P)
Indirect
9.9K shares at avg. $48.06$476K
ALRM
Alarm.com Holdings, Inc.
Nov 19, 2025
Purchase(P)
Indirect
12.5K shares at avg. $48.53$605K
ALRM
Alarm.com Holdings, Inc.
Nov 18, 2025
Purchase(P)
Indirect
3.5K shares at avg. $48.57$172K
ALRM
Alarm.com Holdings, Inc.
May 23, 2025
Sale(S)
Direct
3.6K shares at avg. $56.66$206K
ALRM
Alarm.com Holdings, Inc.
May 22, 2025
Award(A)
Direct
25K shares-
ALRM
Alarm.com Holdings, Inc.
May 16, 2025
Sale(S)
Direct
3.6K shares at avg. $59.51$216K
ALRM
Alarm.com Holdings, Inc.
Apr 2, 2025
Sale(S)
Direct
1.6K shares at avg. $55.49$86K
ALRM
Alarm.com Holdings, Inc.
Dec 10, 2024
Exercise(M)
Direct
47.5K shares at avg. $21.70$1.0M
ALRM
Alarm.com Holdings, Inc.
Dec 10, 2024
Sale(S)
Direct
2K shares at avg. $68.81$138K
ALRM
Alarm.com Holdings, Inc.
Dec 10, 2024
Sale(S)
Direct
45.5K shares at avg. $68.15$3.1M

		Type	Shares	Price		Ownership
Sep 2, 2026	ALRM Alarm.com Holdings, Inc.	Gift(G)	2,000	-	$0	Direct
Aug 24, 2026	ALRM Alarm.com Holdings, Inc.	Exercise(M)	50,000	$32.17	$1,608,500	Direct
Aug 24, 2026	ALRM Alarm.com Holdings, Inc.	Sale(S)	50,000	$57.67	$2,883,500	Direct
May 26, 2026	ALRM Alarm.com Holdings, Inc.	Sale(S)	6,073	$43.78	$265,876	Direct
May 18, 2026	ALRM Alarm.com Holdings, Inc.	Sale(S)	2,944	$43.56	$128,241	Direct
Apr 8, 2026	ALRM Alarm.com Holdings, Inc.	Award(A)	65,000	-	$0	Direct
Nov 20, 2025	ALRM Alarm.com Holdings, Inc.	Purchase(P)	100	$48.66	$4,866	Indirect
Nov 20, 2025	ALRM Alarm.com Holdings, Inc.	Purchase(P)	9,900	$48.06	$475,794	Indirect
Nov 19, 2025	ALRM Alarm.com Holdings, Inc.	Purchase(P)	12,469	$48.53	$605,121	Indirect
Nov 18, 2025	ALRM Alarm.com Holdings, Inc.	Purchase(P)	3,531	$48.57	$171,501	Indirect
May 23, 2025	ALRM Alarm.com Holdings, Inc.	Sale(S)	3,644	$56.66	$206,469	Direct
May 22, 2025	ALRM Alarm.com Holdings, Inc.	Award(A)	25,000	-	-	Direct
May 16, 2025	ALRM Alarm.com Holdings, Inc.	Sale(S)	3,626	$59.51	$215,783	Direct
Apr 2, 2025	ALRM Alarm.com Holdings, Inc.	Sale(S)	1,553	$55.49	$86,176	Direct
Dec 10, 2024	ALRM Alarm.com Holdings, Inc.	Exercise(M)	47,500	$21.70	$1,030,750	Direct
Dec 10, 2024	ALRM Alarm.com Holdings, Inc.	Sale(S)	1,999	$68.81	$137,551	Direct
Dec 10, 2024	ALRM Alarm.com Holdings, Inc.	Sale(S)	45,501	$68.15	$3,100,893	Direct

1-17 of 17 transactions

About Trundle Stephen

Trundle Stephen (SEC CIK 0001643898) files insider reports with the SEC as Chief Executive Officer of Alarm.com Holdings, Inc. (ALRM).

Signal8 holds 10 ownership filings by Trundle Stephen, all Form 4s, filed between Dec 11, 2024 and Sep 4, 2026. Those filings report 17 transactions, from Dec 10, 2024 to Sep 2, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Trundle Stephen's filings is in TYSONS, VA.

Recent filings by Trundle Stephen

Sep 2, 2026: Gift of ALRM shares (Form 4, code G).
Aug 24, 2026: Option exercise of ALRM shares (Form 4, code M).
Aug 24, 2026: Open-market sale of ALRM shares (Form 4, code S).
May 26, 2026: Open-market sale of ALRM shares (Form 4, code S).
May 18, 2026: Open-market sale of ALRM shares (Form 4, code S).

Other insiders filing for Alarm.com Holdings, Inc. (ALRM)

Bradley Kevin Christopher, Chief Financial Officer
Ramos Daniel
Whall Timothy J., Director
NEVIN DARIUS G, Director
Clarke Donald E, Director
McAdam Timothy P, Director

How to read Form 4 transaction codes