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 4 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 |
|---|---|---|---|---|---|
| 2021-11-12 | ALRM | Mixed | −7,875 | -$1.90M | EDGAR |
| 2021-10-13 | ALRM | Mixed | — | -$1.84M | EDGAR |
| 2021-08-23 | ALRM | Mixed | — | -$1.83M | EDGAR |
| 2021-06-08 | ALRM | Sell (S) | −20,000 | -$1.60M | EDGAR |
| 2021-06-02 | ALRM | Sell (S) | −40,279 | -$3.30M | EDGAR |
| 2021-05-18 | ALRM | Mixed | +10,913 | -$1.16M | EDGAR |
| 2021-05-11 | ALRM | Sell (S) | −45,634 | -$3.89M | EDGAR |
| 2021-04-26 | ALRM | Mixed | — | -$1.72M | EDGAR |
| 2021-04-07 | ALRM | Sell (S) | −7,125 | -$622.7K | EDGAR |
| 2021-01-20 | ALRM | Mixed | — | -$1.42M | 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.