As of September 05, 2026, the three largest insider holders of ALRM are Stephen Trundle (Chief Executive Officer, 1.32Mn shares), Stephen Trundle (Chief Executive Officer, 1.32Mn shares), Stephen Trundle (Chief Executive Officer, 1.32Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jeffrey A Bedell | Chief Strategy Innovation | 505,805 | 0 | 505,805 | 39.0% | 18 Dec, 2025 |
| 2 | Stephen Trundle | Chief Executive Officer | 322,842 | 0 | 322,842 | 24.9% | 04 Sep, 2026 |
| 3 | Timothy P Mcadam | Director | 103,838 | 0 | 103,838 | 8.0% | 08 Jun, 2026 |
| 4 | Daniel Kerzner | Chief Product Officer | 101,141 | 0 | 101,141 | 7.8% | 28 May, 2026 |
| 5 | Kevin Christopher Bradley | Chief Financial Officer | 78,222 | 0 | 78,222 | 6.0% | 14 Aug, 2026 |
| 6 | Daniel Ramos | Sr. Vp Corporate Development | 53,099 | 0 | 53,099 | 4.1% | 12 Jun, 2026 |
| 7 | Steve Valenzuela | Chief Financial Officer | 37,500 | 0 | 37,500 | 2.9% | 14 Mar, 2025 |
| 8 | Darius G Nevin | Director | 27,597 | 0 | 27,597 | 2.1% | 08 Jun, 2026 |
| 9 | Donald E Clarke | Director | 18,175 | 0 | 18,175 | 1.4% | 08 Jun, 2026 |
| 10 | Simone Wu | Director | 15,855 | 0 | 15,855 | 1.2% | 08 Jun, 2026 |
| 11 | Timothy J. Whall | Director | 14,404 | 0 | 14,404 | 1.1% | 08 Jun, 2026 |
| 12 | Stephen C. Evans | Director | 9,345 | 0 | 9,345 | 0.7% | 08 Jun, 2026 |
| 13 | Cecile Burleigh Harper | Director | 8,036 | 0 | 8,036 | 0.6% | 08 Jun, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Sep, 2026 | Stephen Trundle | Chief Executive Officer | Disposed G | 2,000 | $0.00 | $0 | 322,842 | Direct |
| 24 Aug, 2026 | Stephen Trundle | Chief Executive Officer | Acquired M | 50,000 | $32.17 | $1.61Mn | 374,842 | Direct |
| 24 Aug, 2026 | Stephen Trundle | Chief Executive Officer | Disposed S | 50,000 | $57.67 | $2.88Mn | 324,842 | Direct |
| 24 Aug, 2026 | Stephen Trundle | Chief Executive Officer | Disposed M | 50,000 | $0.00 | $0 | 0 | Direct |
| 12 Aug, 2026 | Kevin Christopher Bradley | Chief Financial Officer | Disposed S | 5,400 | $55.07 | $297.38K | 78,222 | Direct |
| 10 Jun, 2026 | Daniel Ramos | Officer | Disposed S | 8,000 | $46.23 | $369.84K | 55,099 | Direct |
| 12 Jun, 2026 | Daniel Ramos | Officer | Disposed S | 2,000 | $46.50 | $93.00K | 53,099 | Direct |
| 04 Jun, 2026 | Timothy J. Whall | Director | Acquired A | 3,222 | $0.00 | $0 | 14,404 | Direct |
| 04 Jun, 2026 | Stephen C. Evans | Director | Acquired A | 3,222 | $0.00 | $0 | 9,345 | Direct |
| 04 Jun, 2026 | Timothy P Mcadam | Director | Acquired A | 3,222 | $0.00 | $0 | 103,838 | Direct |
| 04 Jun, 2026 | Darius G Nevin | Director | Acquired A | 3,222 | $0.00 | $0 | 27,597 | Direct |
| 04 Jun, 2026 | Simone Wu | Director | Acquired A | 3,222 | $0.00 | $0 | 15,855 | Direct |
| 04 Jun, 2026 | Cecile Burleigh Harper | Director | Acquired A | 3,222 | $0.00 | $0 | 8,036 | Direct |
| 26 May, 2026 | Daniel Kerzner | Officer | Disposed S | 3,944 | $43.78 | $172.67K | 101,141 | Direct |
| 26 May, 2026 | Daniel Ramos | Officer | Disposed S | 2,532 | $43.78 | $110.85K | 63,099 | Direct |
| 26 May, 2026 | Stephen Trundle | Chief Executive Officer | Disposed S | 6,073 | $43.78 | $265.88K | 324,842 | Direct |
| 18 May, 2026 | Daniel Kerzner | Officer | Disposed S | 1,915 | $43.56 | $83.42K | 105,085 | Direct |
| 18 May, 2026 | Daniel Ramos | Officer | Disposed S | 1,561 | $43.56 | $68.00K | 65,631 | Direct |
| 18 May, 2026 | Stephen Trundle | Chief Executive Officer | Disposed S | 2,944 | $43.56 | $128.24K | 330,915 | Direct |
| 08 Apr, 2026 | Stephen Trundle | Chief Executive Officer | Acquired A | 65,000 | $0.00 | $0 | 333,859 | Direct |