Insider trading

Period: 120 months Stock: ALRM + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

381 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

381 decisions over 120 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

381 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

381 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
381 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
381 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

381 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
24 Aug 2026
Trundle Stephen Chief Executive Officer
Sold on a plan
$2.88M 50,000 at 57.67
13.3%
Planned (10b5-1)
12 Aug 2026
Bradley Kevin Christopher Chief Financial Officer
Sold at will
$297.38K 5,400 at 55.07
6.5%
Not planned
2 Jul 2026
Bradley Kevin Christopher Chief Financial Officer
Sold on a plan
$35.09K 724 at 48.46
0.9%
Planned (10b5-1)
12 Jun 2026
Ramos Daniel See Remarks
Sold at will
$93.00K 2,000 at 46.50
3.6%
Not planned
10 Jun 2026
Ramos Daniel See Remarks
Sold at will
$369.84K 8,000 at 46.23
12.7%
Not planned
10 Jun 2026
Bradley Kevin Christopher Chief Financial Officer
Sold at will
$101.53K 2,200 at 46.15
2.5%
Not planned
26 May 2026
Trundle Stephen Chief Executive Officer
Sold on a plan
$265.88K 6,073 at 43.78
1.8%
Planned (10b5-1)
26 May 2026
Kerzner Daniel See Remarks
Sold on a plan
$172.67K 3,944 at 43.78
3.8%
Planned (10b5-1)
26 May 2026
Ramos Daniel See Remarks
Sold on a plan
$110.85K 2,532 at 43.78
3.9%
Planned (10b5-1)
18 May 2026
Trundle Stephen Chief Executive Officer
Sold on a plan
$128.24K 2,944 at 43.56
0.9%
Planned (10b5-1)
18 May 2026
Kerzner Daniel See Remarks
Sold on a plan
$83.42K 1,915 at 43.56
1.8%
Planned (10b5-1)
18 May 2026
Ramos Daniel See Remarks
Sold on a plan
$68.00K 1,561 at 43.56
2.3%
Planned (10b5-1)
18 Mar 2026
NEVIN DARIUS G Director
Sold on a plan
$1.66M 36,000 at 46.17
59.6%
Sold half or more
18 Mar 2026
Bradley Kevin Christopher Chief Financial Officer
Sold on a plan
$69.41K 1,510 at 45.97
2.8%
Planned (10b5-1)
16 Dec 2025
BEDELL JEFFREY A See Remarks
Sold at will
$1.18M 22,727 at 51.82
4.3%
Not planned
12 Dec 2025
BEDELL JEFFREY A See Remarks
Sold at will
$119.36K 2,273 at 52.51
0.4%
Not planned
12 Dec 2025
Evans Stephen C. Director
Sold at will
$60.32K 1,154 at 52.27
15.9%
Not planned
20 Nov 2025
Trundle Stephen Chief Executive Officer · indirect
Bought 2×
$480.66K 10,000 at 48.07
0.8%
19 Nov 2025
Trundle Stephen Chief Executive Officer · indirect
Bought
$605.12K 12,469 at 48.53
1.0%
Largest buy in 3 yrs
18 Nov 2025
Trundle Stephen Chief Executive Officer · indirect
Bought
$171.50K 3,531 at 48.57
0.3%
First buy on file
13 Nov 2025
Kerzner Daniel See Remarks
Sold at will
$503.30K 10,000 at 50.33
16.1%
Not planned
12 Nov 2025
Kerzner Daniel See Remarks
Sold at will
$1.01M 20,004 at 50.29
27.8%
Not planned
2 Jul 2025
Bradley Kevin Christopher Chief Financial Officer
Sold on a plan
$42.79K 754 at 56.75
1.4%
Planned (10b5-1)
11 Jun 2025
Evans Stephen C. Director
Sold at will
$59.64K 1,000 at 59.64
12.1%
Not planned
27 May 2025
Ramos Daniel See Remarks
Sold on a plan
$403.76K 7,000 at 57.68
14.2%
Planned (10b5-1)
23 May 2025
Trundle Stephen Chief Executive Officer
Sold on a plan
$206.47K 3,644 at 56.66
1.3%
Planned (10b5-1)
23 May 2025
Kerzner Daniel See Remarks
Sold on a plan
$125.39K 2,213 at 56.66
3.0%
Planned (10b5-1)
23 May 2025
BEDELL JEFFREY A See Remarks
Sold on a plan
$124.88K 2,204 at 56.66
0.4%
Planned (10b5-1)
23 May 2025
Ramos Daniel See Remarks
Sold on a plan
$99.83K 1,762 at 56.66
3.5%
Planned (10b5-1)
16 May 2025
Trundle Stephen Chief Executive Officer
Sold on a plan
$215.78K 3,626 at 59.51
1.4%
Planned (10b5-1)
16 May 2025
BEDELL JEFFREY A See Remarks.
Sold on a plan
$120.15K 2,019 at 59.51
0.4%
Planned (10b5-1)
16 May 2025
Kerzner Daniel See Remarks
Sold on a plan
$120.15K 2,019 at 59.51
3.4%
Planned (10b5-1)
16 May 2025
Ramos Daniel See Remarks
Sold on a plan
$97.95K 1,646 at 59.51
4.3%
Planned (10b5-1)
16 May 2025
Bradley Kevin Christopher Chief Financial Officer
Sold on a plan
$23.21K 390 at 59.51
0.7%
Planned (10b5-1)
14 May 2025
Ramos Daniel See Remarks
Sold on a plan
$413.81K 6,890 at 60.06
15.1%
Planned (10b5-1)
2 Apr 2025
Trundle Stephen Chief Executive Officer
Sold on a plan
$86.18K 1,553 at 55.49
0.6%
Planned (10b5-1)
2 Apr 2025
Kerzner Daniel See Remarks
Sold on a plan
$51.72K 932 at 55.49
1.6%
Planned (10b5-1)
2 Apr 2025
BEDELL JEFFREY A See Remarks
Sold on a plan
$43.12K 777 at 55.49
0.2%
Planned (10b5-1)
2 Apr 2025
Ramos Daniel See Remarks
Sold on a plan
$43.12K 777 at 55.49
1.9%
Planned (10b5-1)
12 Mar 2025
Valenzuela Steve Chief Financial Officer
Sold at will
$200.83K 3,436 at 58.45
8.4%
Not planned
6 Mar 2025
Valenzuela Steve Chief Financial Officer
Sold at will
$93.17K 1,564 at 59.57
4.0%
Not planned
13 Dec 2024
Kerzner Daniel See Remarks
Sold at will
$2.18M 32,851 at 66.40
35.5%
Not planned
10 Dec 2024
Trundle Stephen Chief Executive Officer
Sold at will 2×
$3.24M 47,500 at 68.18
15.8%
Not planned
20 Nov 2024
Evans Stephen C. Director
Sold at will
$156.63K 2,625 at 59.67
31.3%
Not planned
23 Aug 2024
Ramos Daniel See Remarks
Sold at will
$585.71K 9,476 at 61.81
18.7%
Not planned
22 Aug 2024
Valenzuela Steve Chief Financial Officer
Sold at will
$446.00K 7,400 at 60.27
16.5%
Not planned
2 Apr 2024
Trundle Stephen Chief Executive Officer
Sold on a plan
$225.19K 3,217 at 70.00
1.4%
Planned (10b5-1)
2 Apr 2024
Kerzner Daniel See Remarks
Sold on a plan
$197.40K 2,820 at 70.00
4.9%
Planned (10b5-1)
2 Apr 2024
Valenzuela Steve Chief Financial Officer
Sold on a plan
$120.12K 1,716 at 70.00
4.6%
Planned (10b5-1)
2 Apr 2024
BEDELL JEFFREY A See Remarks
Sold on a plan
$99.26K 1,418 at 70.00
0.3%
Planned (10b5-1)
Showing 1–50 of 381. Page 1 of 8 Older →