Stephen Trundle
Chief Executive Officer, Director at Alarm.com Holdings, Inc. (ALRM)
Stephen Trundle has filed 31 insider reports with the SEC since January 2021, as chief Executive Officer and director at Alarm.com Holdings, Inc. (ALRM). In the last 12 months Stephen Trundle bought $1.26M and sold $3.28M of stock on the open market. In the latest filing, on August 25, 2026, Stephen Trundle sold 50,000 shares of Alarm.com Holdings, Inc. (ALRM) for $2.88M at an average of $57.67.
- Filings
- 31
- Companies
- 1
- Bought on market
- $1.26M
- Sold on market
- $35.9M
Companies where Stephen Trundle is an insider
| Company | Role | Shares held | Bought | Sold | Avg buy | Price now | Last filing |
|---|---|---|---|---|---|---|---|
| ALRM Alarm.com Holdings, Inc. | Chief Executive Officer, Director | 324,842 | $1.26M | $35.9M | $48.36 | $65.03+34% | Aug 25, 2026 |
Shares held: common shares owned directly after the latest filing that states it. Avg buy: open-market purchase dollars divided by shares bought, every filing on record. Price now: the latest daily close, against the average buy price.
Every filing
- Aug 24, 2026-$2.88MALRMChief Executive Officer Trundle Stephen exercised 50,000 shares at a strike of $32.17 and sold $2,883,500 worth of shares (50,000 units at $57.67) as part of a pre-agreed trading planForm 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- May 26, 2026-$266KALRMChief Executive Officer Trundle Stephen sold $265,876 worth of shares (6,073 units at $43.78), decreasing direct ownership by 2% to 324,842 units (withholding obligation)Form 4Open-market sale
- May 18, 2026-$128KALRMChief Executive Officer Trundle Stephen sold $128,241 worth of shares (2,944 units at $43.56), decreasing direct ownership by 0.88% to 330,915 units (withholding tax)Form 4Open-market sale
- Apr 8, 2026ALRMSEC Form 4 filed by Trundle StephenForm 4Grant or award
- Nov 20, 2025+$1.26MALRMChief Executive Officer Trundle Stephen bought $1,257,281 worth of shares (26,000 units at $48.36)Form 4/AOpen-market purchase
- May 23, 2025-$206KALRMChief Executive Officer Trundle Stephen was granted 25,000 shares and sold $206,469 worth of shares (3,644 units at $56.66), increasing direct ownership by 9% to 268,859 unitsForm 4Grant or awardOpen-market sale
- May 16, 2025-$216KALRMChief Executive Officer Trundle Stephen sold $215,783 worth of shares (3,626 units at $59.51), decreasing direct ownership by 1% to 247,503 unitsForm 4Open-market sale
- Apr 2, 2025-$86.2KALRMChief Executive Officer Trundle Stephen sold $86,176 worth of shares (1,553 units at $55.49), decreasing direct ownership by 0.61% to 251,129 unitsForm 4Open-market sale
- Dec 10, 2024-$3.24MALRMChief Executive Officer Trundle Stephen exercised 47,500 shares at a strike of $21.70 and sold $3,238,444 worth of shares (47,500 units at $68.18)Form 4Exercise or conversion of a derivativeOpen-market sale
- May 22, 2024ALRMTrundle Stephen was granted 25,000 shares and covered exercise/tax liability with 2,255 shares, increasing direct ownership by 10% to 252,682 unitsForm 4Grant or awardShares withheld for taxes or exercise price
- May 15, 2024ALRMTrundle Stephen covered exercise/tax liability with 4,512 shares, decreasing direct ownership by 2% to 229,937 unitsForm 4Shares withheld for taxes or exercise price
- Apr 2, 2024-$225KALRMTrundle Stephen gifted 5,000 shares and sold $225,190 worth of shares (3,217 units at $70.00), decreasing direct ownership by 3% to 234,449 unitsForm 4GiftOpen-market sale
- Feb 23, 2024-$3.69MALRMTrundle Stephen sold $3,689,908 worth of shares (50,000 units at $73.80)Form 4Open-market sale10b5-1 plan
- May 22, 2023ALRMSEC Form 4 filed by Trundle StephenForm 4Grant or award
- May 16, 2023-$229KALRMSEC Form 4 filed by Trundle StephenForm 4Open-market sale
- Apr 3, 2023-$238KALRMSEC Form 4 filed by Trundle StephenForm 4Open-market sale
- May 16, 2022-$138KALRMSEC Form 4: Trundle Stephen was granted 25,000 shares and sold $138,254 worth of shares (2,392 units at $57.80), increasing direct ownership by 11% to 227,147 units (tax liability)Form 4Grant or awardOpen-market sale
- Apr 4, 2022-$360KALRMSEC Form 4: Trundle Stephen sold $359,891 worth of shares (5,305 units at $67.84), decreasing direct ownership by 3% to 204,539 units (withholding tax)Form 4Open-market sale
- Dec 6, 2021-$1.98MALRMSEC Form 4: Trundle Stephen exercised 25,000 shares at a strike of $4.00 and sold $1,977,674 worth of shares (25,000 units at $79.11) as part of a pre-agreed trading planForm 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- Nov 26, 2021ALRMSEC Form 4: Trundle Stephen gifted 289,450 shares, decreasing direct ownership by 15% to 209,844 unitsForm 4Gift
- Nov 22, 2021-$1.64MALRMSEC Form 4: Trundle Stephen sold $1,637,820 worth of shares (19,594 units at $83.59)Form 4Open-market sale
- Nov 17, 2021-$3.44MALRMSEC Form 4: Trundle Stephen sold $3,442,873 worth of shares (40,883 units at $84.21), decreasing direct ownership by 4% to 247,264 unitsForm 4Open-market sale
- Nov 12, 2021-$1.96MALRMSEC Form 4: Trundle Stephen exercised 15,000 shares at a strike of $4.00 and sold $1,960,666 worth of shares (22,875 units at $85.71) as part of a pre-agreed trading plan, decreasing direct ownership by 3% to 257,741 unitsForm 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- Oct 11, 2021-$1.94MALRMSEC Form 4: Trundle Stephen exercised 25,000 shares at a strike of $4.00 and sold $1,941,500 worth of shares (25,000 units at $77.66) as part of a pre-agreed trading planForm 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- Aug 19, 2021-$1.93MALRMSEC Form 4: Trundle Stephen exercised 25,000 units of Common Stock at a strike of $4.00 and sold $1,930,964 worth of Common Stock (25,000 units at $77.24)Form 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- Jun 2, 2021-$3.3MALRMSEC Form 4: Trundle Stephen sold $3,298,334 worth of Common Stock (40,279 units at $81.89)Form 4Open-market sale
- May 11, 2021-$3.89MALRMSEC Form 4: Trundle Stephen sold $3,889,338 worth of Common Stock (45,634 units at $85.23)Form 4Open-market sale
- Apr 22, 2021-$1.8MALRMSEC Form 4: Trundle Stephen exercised 20,000 units of Common Stock at a strike of $4.00 and sold $1,804,668 worth of Common Stock (20,000 units at $90.23)Form 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
- Apr 5, 2021-$623KALRMSEC Form 4: Stephen Trundle sold $622,668 worth of Common Stock (7,125 units at $87.39), decreasing direct ownership by 3% to 240,616 unitsForm 4Open-market sale
- Dec 29, 2020ALRMSEC Form 5: Stephen Trundle gifted 9,862 units of Common Stock and received a gift of 9,862 units of Common Stock, decreasing ownership by 4% to 247,741 unitsForm 5Gift
- Jan 15, 2021-$1.48MALRMSEC Form 4: Stephen Trundle exercised 15,000 units of Common Stock at a strike of $4.00 and sold $1,479,400 worth of Common Stock (15,000 units at $98.63)Form 4Exercise or conversion of a derivativeOpen-market sale10b5-1 plan
Compare Stephen Trundle with
- Stephen Trundle vs Kevin Christopher Bradley1 shared
- Stephen Trundle vs Daniel Ramos1 shared
- Stephen Trundle vs Timothy J. Whall1 shared
- Stephen Trundle vs Darius G Nevin1 shared
- Stephen Trundle vs Donald E Clarke1 shared
- Stephen Trundle vs Timothy P McAdam1 shared
Other insiders at the same companies
- Kevin Christopher BradleyALRM
- Daniel RamosALRM
- Timothy J. WhallALRM
- Darius G NevinALRM
- Donald E ClarkeALRM
- Timothy P McAdamALRM
- Simone WuALRM
- Cecile Burleigh HarperALRM
- Stephen C. EvansALRM
- Daniel KerznerALRM
- Jeffrey A BedellALRM
- Steve ValenzuelaALRM
Questions about Stephen Trundle
- What is Stephen Trundle's role at Alarm.com Holdings, Inc.?
- Stephen Trundle reports to the SEC as chief Executive Officer and director at Alarm.com Holdings, Inc. (ALRM), according to the latest filing on August 25, 2026.
- How many shares does Stephen Trundle own?
- After the latest filing that states it, Stephen Trundle directly owned 324,842 shares of Alarm.com Holdings, Inc. (ALRM). Shares held through trusts, funds or family members are reported separately and are not counted here.
- Has Stephen Trundle bought or sold stock recently?
- The most recent open-market purchase was on November 20, 2025: bought 26,000 shares of Alarm.com Holdings, Inc. (ALRM) for $1.26M at an average of $48.36. The most recent open-market sale was on August 24, 2026: sold 50,000 shares of Alarm.com Holdings, Inc. (ALRM) for $2.88M at an average of $57.67.
- How do I get alerts when Stephen Trundle files?
- Follow Stephen Trundle on Quantisnow and you get an email, and a phone notification on Plus, within minutes of each new Form 4 or Form 5, and of each Form 144 notice of a planned sale. Stephen Trundle filed 1 time in the last 90 days.
From SEC Forms 3, 4, 5 and 144 filed by Stephen Trundle (SEC CIK 0001643898). Totals count each trade once, skipping amendments whose original is on file, from Jan 20, 2021 on. View on SEC EDGAR