Stephen Trundle
CIK 1643898 · Chief Executive Officer · last filed 2026-05-28
Stephen Trundle is a Chief Executive Officer who has filed 65 SEC Form 4 insider transactions across 1 company since 2015. The most recent filing shows the insider sold $265.9K of ALRM on May 28, 2026. Across all open-market trades the lifetime net is −$81.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $92.3M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$92.33M
1
65
-$81.67M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ALRM | Chief Executive Officer | 1,640,185 | $56.29 | $92.33M | -$81.67M | 56 | 2026-05-28 |
Recent Filings
65 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-28 | ALRM | Sell (S) | −6,073 | -$265.9K | EDGAR |
| 2026-05-26 | ALRM | Notice (144) | −6,073 | -$265.8K | EDGAR |
| 2026-05-20 | ALRM | Sell (S) | −2,944 | -$128.2K | EDGAR |
| 2026-05-18 | ALRM | Notice (144) | −2,944 | -$128.1K | EDGAR |
| 2026-04-10 | ALRM | Grant (A) | +65,000 | $0 | EDGAR |
| 2025-11-20 | ALRM | Buy (P) | +26,000 | $1.26M | EDGAR |
| 2025-05-27 | ALRM | Mixed | +21,356 | -$206.5K | EDGAR |
| 2025-05-23 | ALRM | Notice (144) | −3,644 | -$206.5K | EDGAR |
| 2025-05-16 | ALRM | Notice (144) | −3,626 | -$215.2K | EDGAR |
| 2025-05-16 | ALRM | Sell (S) | −3,626 | -$215.8K | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.