Stephen Trundle is CEO & President at Alarm.com Holdings, Inc. (ALRM). They have made 51 open-market trades across 1 company since 2017, most recently 2026-09-02.
CIK 0001643898
1 open-market purchase totalling $2.0M since 2025, against 50 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ALRM | 322,842 | $18.5M |
Shares reported on the most recent Form 4, priced at the 2026-09-04 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ALRM | SELL · 10b5-1 | 2026-08-24 | 2026-08-25 | $57.67 | $2.9M | +0.4% | -4.9% | — |
| ALRM | SELL | 2026-05-26 | 2026-05-28 | $43.78 | $266K | +2.0% | +3.9% | +27.4% |
| ALRM | SELL | 2026-05-18 | 2026-05-20 | $43.56 | $128K | +6.1% | +0.6% | +28.1% |
| ALRM | BUY | 2025-11-18 | 2025-11-20 | $48.43 | $2.0M | +7.4% | +7.8% | -6.8% |
| ALRM | SELL | 2025-05-23 | 2025-05-27 | $56.66 | $413K | +1.1% | -2.2% | +0.3% |
| ALRM | SELL | 2025-05-16 | 2025-05-16 | $59.51 | $432K | -1.8% | -1.2% | -3.2% |
| ALRM | SELL | 2025-04-02 | 2025-04-04 | $55.49 | $172K | +3.2% | +9.9% | +17.7% |
| ALRM | SELL | 2024-12-10 | 2024-12-11 | $68.18 | $6.5M | -9.4% | -12.1% | -13.6% |
| ALRM | SELL · 10b5-1 | 2024-04-02 | 2024-04-03 | $70.00 | $225K | -7.4% | -3.8% | -11.1% |
| ALRM | SELL · 10b5-1 | 2024-02-23 | 2024-02-27 | $73.79 | $7.3M | +0.5% | -2.9% | -10.0% |
| ALRM | SELL | 2023-05-16 | 2023-05-18 | $48.82 | $458K | -2.4% | -0.1% | +11.7% |
| ALRM | SELL | 2023-04-03 | 2023-04-05 | $49.63 | $467K | -0.2% | -6.3% | +5.4% |
| ALRM | SELL | 2022-05-16 | 2022-05-17 | $57.80 | $138K | +11.7% | -0.7% | +30.4% |
| ALRM | SELL | 2022-04-04 | 2022-04-06 | $67.84 | $720K | -3.7% | -8.6% | +1.2% |
| ALRM | SELL | 2021-12-06 | 2021-12-08 | $79.11 | $4.0M | -5.7% | -6.4% | -21.8% |
| ALRM | SELL | 2021-11-18 | 2021-11-22 | $83.59 | $3.3M | -6.6% | -2.4% | -19.2% |
| ALRM | SELL | 2021-11-15 | 2021-11-17 | $84.21 | $6.9M | -5.5% | -5.4% | -13.6% |
| ALRM | SELL | 2021-11-09 | 2021-11-12 | $85.61 | $3.8M | -3.7% | -9.1% | -16.9% |
| ALRM | SELL | 2021-10-11 | 2021-10-13 | $77.66 | $1.9M | +2.1% | +7.4% | +1.0% |
| ALRM | SELL | 2021-08-19 | 2021-08-23 | $77.24 | $1.9M | +3.4% | -1.9% | +1.8% |
| ALRM | SELL | 2021-06-04 | 2021-06-08 | $80.24 | $2.5M | +0.6% | +2.9% | +0.5% |
| ALRM | SELL | 2021-05-28 | 2021-06-02 | $81.89 | $6.6M | +5.9% | +9.3% | +6.7% |
| ALRM | SELL | 2021-05-14 | 2021-05-18 | $82.29 | $2.3M | +6.6% | +8.8% | +6.1% |
| ALRM | SELL | 2021-05-07 | 2021-05-11 | $85.23 | $7.8M | -2.5% | -0.9% | +5.8% |
| ALRM | SELL | 2021-04-22 | 2021-04-26 | $90.36 | $2.9M | -11.5% | -14.4% | -14.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.