Trundle Stephen insider trades
Trundle Stephen has filed 26 Form 4s with the SEC that we hold, all for Alarm.com Holdings, Inc. (ALRM), as Chief Executive Officer, Director. Across all of them we count 4 purchases worth $1.3M and 37 sales worth $24.8M reported on Form 4. In the last 12 months: 4 purchases ($1.3M) and 3 sales ($3.3M). The largest single trade was a sale of 49,400 shares of Alarm.com Holdings, Inc. worth $3.6M, dated 2024-02-23. Of 1 sale filed since we began reading the 10b5-1 checkbox, 1 (100%) was marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2021-08-23 and the latest 2026-09-04.
Alarm.com Holdings, Inc. (ALRM)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-08-19 | S, sale reported on Form 4 | 600 | $45.6K | 2021-08-23 |
| 2021-08-19 | S, sale reported on Form 4 | 24,400 | $1.9M | 2021-08-23 |
| 2021-10-11 | S, sale reported on Form 4 | 25,000 | $1.9M | 2021-10-13 |
| 2021-11-09 | S, sale reported on Form 4 | 1,000 | $90.2K | 2021-11-12 |
| 2021-11-11 | S, sale reported on Form 4 | 7,222 | $616.3K | 2021-11-12 |
| 2021-11-12 | S, sale reported on Form 4 | 14,653 | $1.3M | 2021-11-12 |
| 2021-11-15 | S, sale reported on Form 4 | 10,477 | $873.2K | 2021-11-17 |
| 2021-11-15 | S, sale reported on Form 4 | 100 | $8.5K | 2021-11-17 |
| 2021-11-16 | S, sale reported on Form 4 | 13,267 | $1.1M | 2021-11-17 |
| 2021-11-16 | S, sale reported on Form 4 | 9,158 | $778.5K | 2021-11-17 |
| 2021-11-17 | S, sale reported on Form 4 | 300 | $25.6K | 2021-11-17 |
| 2021-11-17 | S, sale reported on Form 4 | 7,581 | $641.6K | 2021-11-17 |
| 2021-11-18 | S, sale reported on Form 4 | 3,410 | $284.4K | 2021-11-22 |
| 2021-11-19 | S, sale reported on Form 4 | 2,804 | $234.3K | 2021-11-22 |
| 2021-11-19 | S, sale reported on Form 4 | 105 | $8.9K | 2021-11-22 |
| 2021-11-22 | S, sale reported on Form 4 | 4,053 | $341.1K | 2021-11-22 |
| 2021-11-22 | S, sale reported on Form 4 | 9,222 | $769.1K | 2021-11-22 |
| 2021-12-06 | S, sale reported on Form 4 | 19,821 | $1.6M | 2021-12-08 |
| 2021-12-06 | S, sale reported on Form 4 | 3,462 | $271.1K | 2021-12-08 |
| 2021-12-06 | S, sale reported on Form 4 | 1,717 | $136.8K | 2021-12-08 |
| 2022-04-04 | S, sale reported on Form 4 | 5,305 | $359.9K | 2022-04-06 |
| 2022-05-16 | S, sale reported on Form 4 | 462 | $26.9K | 2022-05-17 |
| 2022-05-16 | S, sale reported on Form 4 | 1,930 | $111.4K | 2022-05-17 |
| 2023-04-03 | S, sale reported on Form 4 | 4,618 | $229.1K | 2023-04-05 |
| 2023-04-03 | S, sale reported on Form 4 | 169 | $8.5K | 2023-04-05 |
| 2023-05-16 | S, sale reported on Form 4 | 4,694 | $229.2K | 2023-05-18 |
| 2024-02-23 | S, sale reported on Form 4 | 49,400 | $3.6M | 2024-02-27 |
| 2024-02-23 | S, sale reported on Form 4 | 600 | $44.7K | 2024-02-27 |
| 2024-04-02 | S, sale reported on Form 4 | 3,217 | $225.2K | 2024-04-03 |
| 2024-12-10 | S, sale reported on Form 4 | 1,999 | $137.6K | 2024-12-11 |
| 2024-12-10 | S, sale reported on Form 4 | 45,501 | $3.1M | 2024-12-11 |
| 2025-04-02 | S, sale reported on Form 4 | 1,553 | $86.2K | 2025-04-04 |
| 2025-05-16 | S, sale reported on Form 4 | 3,626 | $215.8K | 2025-05-16 |
| 2025-05-23 | S, sale reported on Form 4 | 3,644 | $206.5K | 2025-05-27 |
| 2025-11-18 | P, purchase reported on Form 4 | 3,531 | $171.5K | 2025-11-20 |
| 2025-11-19 | P, purchase reported on Form 4 | 12,469 | $605.1K | 2025-11-20 |
| 2025-11-20 | P, purchase reported on Form 4 | 100 | $4.9K | 2025-11-20 |
| 2025-11-20 | P, purchase reported on Form 4 | 9,900 | $475.8K | 2025-11-20 |
| 2026-05-18 | S, sale reported on Form 4 | 2,944 | $128.2K | 2026-05-20 |
| 2026-05-26 | S, sale reported on Form 4 | 6,073 | $265.9K | 2026-05-28 |
| 2026-08-24 | S, sale reported on Form 4 | 50,000 | $2.9M | 2026-08-25 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1643898) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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