Stephen Trundle
CIK 1643898 · Chief Executive Officer · last filed 2026-05-28
"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.
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Disclosed Exposure
$92.33M
Companies
1
Total Filings
65
Lifetime Open-Market Net
-$81.67M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 6 of 7
65 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2019-04-24 | ALRM | Mixed | — | -$1.27M | EDGAR |
| 2019-04-10 | ALRM | Mixed | — | -$910.6K | EDGAR |
| 2019-04-03 | ALRM | Mixed | +22,729 | -$146.8K | EDGAR |
| 2019-01-16 | ALRM | Mixed | — | -$1.54M | EDGAR |
| 2018-12-12 | ALRM | Mixed | −20,000 | -$496.8K | EDGAR |
| 2018-11-15 | ALRM | Mixed | −30,000 | -$2.09M | EDGAR |
| 2018-08-17 | ALRM | Mixed | — | -$703.2K | EDGAR |
| 2018-06-19 | ALRM | Mixed | — | -$923.9K | EDGAR |
| 2018-04-03 | ALRM | Grant (A) | +25,000 | $0 | EDGAR |
| 2018-03-19 | ALRM | Mixed | +2,500 | -$826.3K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.
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.