ALRM
Alarm.com Holdings, Inc. · Technology · Market cap $2.8B
Insiders sold $3.8M net in the last 90 days ·3 sellers, 0 buyers· 1 of 6 sales under Rule 10b5-1 plans· latest Form 4 filed Aug 25, 2026
Insider Buying
$1.3M
reported purchases (SEC code P)
Insider Selling
$9.2M
reported sales (SEC code S)
Unique Insiders
7
in the rolling window
Latest filing
Sep 4, 2026
Trundle Stephen
Alarm.com Holdings, Inc. (ALRM) has 31 SEC Form 4 filings (41 transaction rows) in the rolling window, disclosed by 7 distinct insiders. Most recent filing: Sep 4, 2026.
Inside the rolling window, 7 insiders at Alarm.com Holdings, Inc. reported 3 open-market purchases totaling $1.3M and 19 open-market sales totaling $9.2M. The most active filer is Chief Executive Officer Trundle Stephen with 6 filings. Insiders have net sold $6.3M over the trailing 6 months. The most recent open-market filing is a sale of 50,000 shares by Chief Executive Officer Trundle Stephen, dated Aug 24, 2026, worth $2.9M.
- Industry:Software - Application
- CEO:Stephen S. Trundle
- Employees:2,051
- HQ:Tysons, VA, US
- IPO:2015-06-26
| Source | |||||||
|---|---|---|---|---|---|---|---|
| Chief Executive Officer | Sale | 50,000 | $2.9M | Aug 25 | -0.5% | SEC ↗ | |
| Chief Financial Officer | Sale | 5,400 | $297K | Aug 14 | +1.6% | SEC ↗ | |
| Chief Financial Officer | Sale | 724 | $35K | Jul 2 | +13.7% | SEC ↗ | |
| See Remarks | Sale | 8,000 | $370K | Jun 12 | +21.1% | SEC ↗ | |
| See Remarks | Sale | 2,000 | $93K | Jun 12 | +21.1% | SEC ↗ | |
| Chief Financial Officer | Sale | 2,200 | $102K | Jun 12 | +21.1% | SEC ↗ | |
| See Remarks | Sale | 2,532 | $111K | May 28 | +28.1% | SEC ↗ | |
| See Remarks | Sale | 3,944 | $173K | May 28 | +28.1% | SEC ↗ | |
| Chief Executive Officer | Sale | 6,073 | $266K | May 28 | +28.1% | SEC ↗ | |
Ramos DanielFirst filing | See Remarks | Sale | 1,561 | $68K | May 20 | +28.2% | SEC ↗ |
Kerzner DanielFirst in 6 months | See Remarks | Sale | 1,915 | $83K | May 20 | — | SEC ↗ |
Trundle StephenFirst in 6 months | Chief Executive Officer | Sale | 2,944 | $128K | May 20 | — | SEC ↗ |
NEVIN DARIUS GFirst filing | Director | Sale | 36,000 | $1.7M | Mar 19 | — | SEC ↗ |
Bradley Kevin ChristopherFirst filing | Chief Financial Officer | Sale | 1,510 | $69K | Mar 19 | — | SEC ↗ |
| See Remarks | Sale | 22,727 | $1.2M | Dec 18 | — | SEC ↗ | |
BEDELL JEFFREY AFirst filing | See Remarks | Sale | 2,273 | $119K | Dec 16 | — | SEC ↗ |
Evans Stephen C.First filing | Director | Sale | 1,154 | $60K | Dec 16 | — | SEC ↗ |
Trundle StephenFirst filing | Chief Executive Officer | Purchase | 3,531 | $172K | Nov 20 | — | SEC ↗ |
Trundle StephenFirst filing | Chief Executive Officer | Purchase | 12,469 | $605K | Nov 20 | — | SEC ↗ |
Trundle StephenFirst filing | Chief Executive Officer | Purchase | 10,000 | $481K | Nov 20 | — | SEC ↗ |
Kerzner DanielFirst filing | See Remarks | Sale | 20,004 | $1.0M | Nov 14 | — | SEC ↗ |
Kerzner DanielFirst filing | See Remarks | Sale | 10,000 | $503K | Nov 14 | — | SEC ↗ |
Congress trading ALRM 1 all-time
- RRep. Greg GianfortePurchase$100,001 - $250,0002019-07-22
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does ALRM have?
Alarm.com Holdings, Inc. (ALRM) has 31 SEC Form 4 filings (41 transaction rows) in the rolling 365-day window, disclosed by 7 distinct insiders. Most recent filing: Sep 4, 2026.
When was the most recent SEC Form 4 filing for ALRM?
The most recent Form 4 filing for ALRM on Tracefour is dated Sep 4, 2026.
Who is the most active insider at ALRM?
The most active SEC Form 4 filer at ALRM in the rolling window is Chief Executive Officer Trundle Stephen, with 6 filings.
What is the net insider flow at ALRM over the last 6 months?
Over the trailing 180 days, insiders at ALRM have net sold $6.3M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at ALRM in the current window?
Inside the rolling window, insiders at ALRM bought $1.3M and sold $9.2M based on SEC Form 4 filings.
Can I get alerts for ALRM insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at Alarm.com Holdings, Inc. (ALRM). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
Alarm.com Holdings, Inc. is in the Technology sector.