Updated Jul 16, 2026
Trundle Stephen has filed 2 SEC Form 4 filings across 1 company in the last 90 days — active on both sides. Lifetime open-market purchases: $1.26M. Lifetime open-market sales: $3.63M. Historical track record: 5/5 stars across 4 tracked purchases.
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★★★★★ (5/5) |
|---|---|
| Total purchases tracked | 4 |
| Purchases with forward-return data | 4 |
| 30-day win rate | 10000% |
| 90-day win rate | 0% |
| Avg 5-day return | +935.08% |
| Avg 30-day return | +939.68% |
| Avg 90-day return | -573.35% |
| Best 30-day return | +973.97% |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-28 | ALRM | Alarm.com Holdings, Inc. | S — Open-market sale | 6.1K | $43.78 | $266K |
| 2026-05-20 | ALRM | Alarm.com Holdings, Inc. | S — Open-market sale | 2.9K | $43.56 | $128K |
| 2026-04-10 | ALRM | Alarm.com Holdings, Inc. | A — Grant or award | 65.0K | $0.00 | |
| 2025-11-20 | ALRM | Alarm.com Holdings, Inc. | P — Open-market purchase | 100 | $48.66 | $5K |
| 2025-11-20 | ALRM | Alarm.com Holdings, Inc. | P — Open-market purchase | 9.9K | $48.06 | $476K |
| 2025-11-20 | ALRM | Alarm.com Holdings, Inc. | P — Open-market purchase | 12.5K | $48.53 | $605K |
| 2025-11-20 | ALRM | Alarm.com Holdings, Inc. | P — Open-market purchase | 3.5K | $48.57 | $172K |
| 2024-12-11 | ALRM | Alarm.com Holdings, Inc. | S — Open-market sale | 2.0K | $68.81 | $138K |
| 2024-12-11 | ALRM | Alarm.com Holdings, Inc. | S — Open-market sale | 45.5K | $68.15 | $3.10M |
| 2024-12-11 | ALRM | Alarm.com Holdings, Inc. | M — Option exercise | 47.5K | $21.70 | $1.03M |
Trundle Stephen is a corporate insider — currently tracked as Insider of Alarm.com Holdings, Inc. (ALRM). InsiderAlpha tracks every SEC Form 4 filing in real time.
2 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 4 open-market purchases ($1.26M) and 4 open-market sales ($3.63M) across all tracked filings.
Across 4 tracked purchases, Trundle Stephen averaged +939.7% avg 30-day return with a 10000% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Open the live Trundle Stephen profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.