Stephen Trundle
CIK 1643898 · View on SEC EDGAR ↗
Insider
First SEC filing: June 25, 2015 · Latest: May 28, 2026
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
4 buys (P)
2 sells (S)
Net:
$863,165
+ 35 non-open-market transactions below
Avg return of open purchases vs now:
18.2%
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
35 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 26, 2026 | ALRM | S | 6,073 | $43.78 | $265,876 | 324,842 Direct | -1.84% | Disposed | 30.9% (price as of 2026-08-20) |
| May 18, 2026 | ALRM | S | 2,944 | $43.56 | $128,241 | 330,915 Direct | -0.88% | Disposed | 31.5% (price as of 2026-08-20) |
| Nov. 20, 2025 | ALRM | P | 100 | $48.66 | $4,866 | 1,315,343 Indirect | +0.01% | Acquired | 17.7% (price as of 2026-08-20) |
| Nov. 20, 2025 | ALRM | P | 9,900 | $48.06 | $475,794 | 1,315,243 Indirect | +0.76% | Acquired | 19.2% (price as of 2026-08-20) |
| Nov. 19, 2025 | ALRM | P | 12,469 | $48.53 | $605,121 | 1,305,343 Indirect | +0.96% | Acquired | 18.1% (price as of 2026-08-20) |
| Nov. 18, 2025 | ALRM | P | 3,531 | $48.57 | $171,501 | 1,292,874 Indirect | +0.27% | Acquired | 18.0% (price as of 2026-08-20) |
| May 23, 2025 | ALRM | S | 3,644 | $56.66 | $206,469 | 268,859 Direct | -1.34% | Disposed | 1.1% (price as of 2026-08-20) |
| May 16, 2025 | ALRM | S | 3,626 | $59.51 | $215,783 | 247,503 Direct | -1.44% | Disposed | -3.7% (price as of 2026-08-20) |
| April 2, 2025 | ALRM | S | 1,553 | $55.49 | $86,176 | 251,129 Direct | -0.61% | Disposed | 3.3% (price as of 2026-08-20) |
| Dec. 10, 2024 | ALRM | S | 1,999 | $68.81 | $137,551 | 252,682 Direct | -0.78% | Disposed | -16.7% (price as of 2026-08-20) |
| Dec. 10, 2024 | ALRM | S | 45,501 | $68.15 | $3,100,893 | 254,681 Direct | -15.16% | Disposed | -15.9% (price as of 2026-08-20) |
| April 2, 2024 | ALRM | S | 3,217 | $70.00 | $225,190 | 234,449 Direct | -1.35% | Disposed | -18.1% (price as of 2026-08-20) |
| Feb. 23, 2024 | ALRM | S 10b5-1 | 49,400 | $73.79 | $3,645,226 | 1,289,943 Indirect | -3.69% | Disposed | -22.4% (price as of 2026-08-20) |
| Feb. 23, 2024 | ALRM | S 10b5-1 | 600 | $74.47 | $44,682 | 1,289,343 Indirect | -0.05% | Disposed | -23.1% (price as of 2026-08-20) |
| May 16, 2023 | ALRM | S | 4,694 | $48.82 | $229,161 | 217,666 Direct | -2.11% | Disposed | 17.4% (price as of 2026-08-20) |
| April 3, 2023 | ALRM | S | 169 | $50.08 | $8,464 | 222,360 Direct | -0.08% | Disposed | 14.4% (price as of 2026-08-20) |
| April 3, 2023 | ALRM | S | 4,618 | $49.62 | $229,145 | 222,529 Direct | -2.03% | Disposed | 15.5% (price as of 2026-08-20) |
| May 16, 2022 | ALRM | S | 462 | $58.21 | $26,893 | 227,147 Direct | -0.20% | Disposed | -1.6% (price as of 2026-08-20) |
| May 16, 2022 | ALRM | S | 1,930 | $57.70 | $111,361 | 227,609 Direct | -0.84% | Disposed | -0.7% (price as of 2026-08-20) |
| April 4, 2022 | ALRM | S | 5,305 | $67.84 | $359,891 | 204,539 Direct | -2.53% | Disposed | -15.5% (price as of 2026-08-20) |
| Dec. 6, 2021 | ALRM | S 10b5-1 | 1,717 | $79.66 | $136,776 | 209,844 Direct | -0.81% | Disposed | -28.1% (price as of 2026-08-20) |
| Dec. 6, 2021 | ALRM | S 10b5-1 | 19,821 | $79.20 | $1,569,823 | 211,561 Direct | -8.57% | Disposed | -27.7% (price as of 2026-08-20) |
| Dec. 6, 2021 | ALRM | S 10b5-1 | 3,462 | $78.30 | $271,075 | 231,382 Direct | -1.47% | Disposed | -26.8% (price as of 2026-08-20) |
| Nov. 22, 2021 | ALRM | S | 4,053 | $84.16 | $341,100 | 1,591,373 Indirect | -0.25% | Disposed | -31.9% (price as of 2026-08-20) |
| Nov. 22, 2021 | ALRM | S | 9,222 | $83.40 | $769,115 | 1,595,426 Indirect | -0.57% | Disposed | -31.3% (price as of 2026-08-20) |
| Nov. 19, 2021 | ALRM | S | 105 | $84.52 | $8,875 | 1,604,648 Indirect | -0.01% | Disposed | -32.2% (price as of 2026-08-20) |
| Nov. 19, 2021 | ALRM | S | 2,804 | $83.56 | $234,302 | 1,604,753 Indirect | -0.17% | Disposed | -31.4% (price as of 2026-08-20) |
| Nov. 18, 2021 | ALRM | S | 3,410 | $83.41 | $284,428 | 1,607,557 Indirect | -0.21% | Disposed | -31.3% (price as of 2026-08-20) |
| Nov. 17, 2021 | ALRM | S | 300 | $85.38 | $25,614 | 1,610,967 Indirect | -0.02% | Disposed | -32.9% (price as of 2026-08-20) |
| Nov. 17, 2021 | ALRM | S | 7,581 | $84.63 | $641,580 | 1,611,267 Indirect | -0.47% | Disposed | -32.3% (price as of 2026-08-20) |
| Nov. 16, 2021 | ALRM | S | 9,158 | $85.01 | $778,522 | 1,618,848 Indirect | -0.56% | Disposed | -32.6% (price as of 2026-08-20) |
| Nov. 16, 2021 | ALRM | S | 13,267 | $84.08 | $1,115,489 | 1,628,006 Indirect | -0.81% | Disposed | -31.9% (price as of 2026-08-20) |
| Nov. 15, 2021 | ALRM | S | 10,477 | $83.34 | $873,153 | 247,264 Direct | -4.06% | Disposed | -31.3% (price as of 2026-08-20) |
| Nov. 15, 2021 | ALRM | S | 100 | $85.15 | $8,515 | 1,641,273 Indirect | -0.01% | Disposed | -32.7% (price as of 2026-08-20) |
| Nov. 12, 2021 | ALRM | S 10b5-1 | 14,653 | $85.59 | $1,254,150 | 257,741 Direct | -5.38% | Disposed | -33.1% (price as of 2026-08-20) |
| Nov. 11, 2021 | ALRM | S 10b5-1 | 7,222 | $85.34 | $616,325 | 265,616 Direct | -2.65% | Disposed | -32.9% (price as of 2026-08-20) |
| Nov. 9, 2021 | ALRM | S 10b5-1 | 1,000 | $90.19 | $90,190 | 265,616 Direct | -0.38% | Disposed | -36.5% (price as of 2026-08-20) |
| Oct. 11, 2021 | ALRM | S 10b5-1 | 25,000 | $77.66 | $1,941,500 | 265,616 Direct | -8.60% | Disposed | -26.2% (price as of 2026-08-20) |
| Aug. 19, 2021 | ALRM | S 10b5-1 | 24,400 | $77.27 | $1,885,388 | 265,616 Direct | -8.41% | Disposed | -25.9% (price as of 2026-08-20) |
| Aug. 19, 2021 | ALRM | S 10b5-1 | 600 | $75.96 | $45,576 | 290,016 Direct | -0.21% | Disposed | -24.6% (price as of 2026-08-20) |
| June 7, 2021 | ALRM | S | 10,318 | $80.35 | $829,051 | 260,944 Indirect | -3.80% | Disposed | -28.7% (price as of 2026-08-20) |
| June 7, 2021 | ALRM | S | 1,257 | $80.83 | $101,603 | 259,687 Indirect | -0.48% | Disposed | -29.1% (price as of 2026-08-20) |
| June 4, 2021 | ALRM | S | 8,425 | $79.80 | $672,315 | 271,262 Indirect | -3.01% | Disposed | -28.2% (price as of 2026-08-20) |
| June 2, 2021 | ALRM | S | 6,655 | $82.05 | $546,043 | 1,641,373 Indirect | -0.40% | Disposed | -30.2% (price as of 2026-08-20) |
| June 1, 2021 | ALRM | S | 203 | $82.44 | $16,735 | 1,648,028 Indirect | -0.01% | Disposed | -30.5% (price as of 2026-08-20) |
| June 1, 2021 | ALRM | S | 20,860 | $81.78 | $1,705,931 | 1,648,231 Indirect | -1.25% | Disposed | -29.9% (price as of 2026-08-20) |
| May 28, 2021 | ALRM | S | 12,561 | $81.97 | $1,029,625 | 1,669,091 Indirect | -0.75% | Disposed | -30.1% (price as of 2026-08-20) |
| May 14, 2021 | ALRM | S | 14,087 | $82.29 | $1,159,219 | 1,681,652 Indirect | -0.83% | Disposed | -30.4% (price as of 2026-08-20) |
| May 11, 2021 | ALRM | S | 298 | $84.82 | $25,276 | 1,695,739 Indirect | -0.02% | Disposed | -32.5% (price as of 2026-08-20) |
| May 11, 2021 | ALRM | S | 14,953 | $84.17 | $1,258,594 | 1,696,037 Indirect | -0.87% | Disposed | -31.9% (price as of 2026-08-20) |
| May 7, 2021 | ALRM | S | 4,870 | $86.55 | $421,498 | 1,710,990 Indirect | -0.28% | Disposed | -33.8% (price as of 2026-08-20) |
| May 7, 2021 | ALRM | S | 12,906 | $86.21 | $1,112,626 | 1,715,860 Indirect | -0.75% | Disposed | -33.5% (price as of 2026-08-20) |
| May 7, 2021 | ALRM | S | 12,607 | $84.98 | $1,071,343 | 1,728,766 Indirect | -0.72% | Disposed | -32.6% (price as of 2026-08-20) |
| April 22, 2021 | ALRM | S 10b5-1 | 1,191 | $91.42 | $108,881 | 240,616 Direct | -0.49% | Disposed | -37.3% (price as of 2026-08-20) |
| April 22, 2021 | ALRM | S 10b5-1 | 10,809 | $90.49 | $978,106 | 241,807 Direct | -4.28% | Disposed | -36.7% (price as of 2026-08-20) |
| April 22, 2021 | ALRM | S 10b5-1 | 8,000 | $89.71 | $717,680 | 252,616 Direct | -3.07% | Disposed | -36.1% (price as of 2026-08-20) |
| April 5, 2021 | ALRM | S | 408 | $87.92 | $35,871 | 240,616 Direct | -0.17% | Disposed | -34.8% (price as of 2026-08-20) |
| April 5, 2021 | ALRM | S | 6,717 | $87.36 | $586,797 | 241,024 Direct | -2.71% | Disposed | -34.4% (price as of 2026-08-20) |
| Jan. 15, 2021 | ALRM | S 10b5-1 | 3,950 | $97.54 | $385,283 | 268,791 Direct | -1.45% | Disposed | -41.3% (price as of 2026-08-20) |
| Jan. 15, 2021 | ALRM | S 10b5-1 | 5,100 | $98.36 | $501,636 | 263,691 Direct | -1.90% | Disposed | -41.7% (price as of 2026-08-20) |
| Jan. 15, 2021 | ALRM | S 10b5-1 | 5,950 | $99.98 | $594,881 | 257,741 Direct | -2.26% | Disposed | -42.7% (price as of 2026-08-20) |
| Nov. 18, 2020 | ALRM | S | 5,926 | $71.24 | $422,168 | 1,751,235 Indirect | -0.34% | Disposed | -19.6% (price as of 2026-08-20) |
| Nov. 18, 2020 | ALRM | S | 17,435 | $70.67 | $1,232,131 | 1,757,161 Indirect | -0.98% | Disposed | -18.9% (price as of 2026-08-20) |
| Nov. 17, 2020 | ALRM | S | 626 | $70.81 | $44,327 | 1,774,596 Indirect | -0.04% | Disposed | -19.1% (price as of 2026-08-20) |
| Nov. 17, 2020 | ALRM | S | 28,513 | $70.19 | $2,001,327 | 1,775,222 Indirect | -1.58% | Disposed | -18.4% (price as of 2026-08-20) |
Showing latest 100 of 211 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| May 22, 2025 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (40,000) | $56.94 | May 21, 2035 | 40,000 | Acquired |
| Dec. 10, 2024 | ALRM | Stock Option (Right to Buy) | Common Stock (47,500) | $21.70 | May 14, 2026 | 47,500 | Disposed |
| May 22, 2024 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (30,000) | $67.02 | May 21, 2034 | 30,000 | Acquired |
| May 22, 2023 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (30,000) | $51.50 | May 22, 2033 | 30,000 | Acquired |
| May 15, 2022 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (30,000) | $59.10 | May 14, 2032 | 30,000 | Acquired |
| Dec. 6, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (25,000) | $4.00 | Dec. 30, 2023 | 25,000 | Disposed |
| Nov. 12, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (6,778) | $4.00 | Dec. 30, 2023 | 6,778 | Disposed |
| Nov. 11, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (7,222) | $4.00 | Dec. 30, 2023 | 7,222 | Disposed |
| Nov. 9, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (1,000) | $4.00 | Dec. 30, 2023 | 1,000 | Disposed |
| Oct. 11, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (25,000) | $4.00 | Dec. 30, 2023 | 25,000 | Disposed |
| Aug. 19, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (25,000) | $4.00 | Dec. 30, 2023 | 25,000 | Disposed |
| May 15, 2021 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (30,000) | $82.51 | May 14, 2031 | 30,000 | Acquired |
| April 22, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (20,000) | $4.00 | Dec. 30, 2023 | 20,000 | Disposed |
| Jan. 15, 2021 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $4.00 | Dec. 30, 2023 | 15,000 | Disposed |
| Nov. 9, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $4.00 | Dec. 30, 2023 | 15,000 | Disposed |
| Aug. 25, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $4.00 | Dec. 30, 2023 | 15,000 | Disposed |
| Aug. 24, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (10,000) | $4.00 | Dec. 30, 2023 | 10,000 | Disposed |
| April 8, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (35,000) | $4.00 | Dec. 30, 2023 | 35,000 | Disposed |
| April 1, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (30,000) | $37.94 | March 31, 2030 | 30,000 | Acquired |
| Jan. 13, 2020 | ALRM | Stock Option (Right to Buy) | Common Stock (20,000) | $4.00 | Dec. 30, 2023 | 20,000 | Disposed |
| Nov. 15, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (5,000) | $4.00 | Dec. 30, 2023 | 5,000 | Disposed |
| Nov. 14, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (10,000) | $4.00 | Dec. 30, 2023 | 10,000 | Disposed |
| Aug. 19, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (20,000) | $4.00 | Dec. 30, 2023 | 20,000 | Disposed |
| April 22, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (20,000) | $4.00 | Dec. 30, 2023 | 20,000 | Disposed |
| April 8, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $4.00 | Dec. 30, 2023 | 15,000 | Disposed |
| April 1, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (30,000) | $65.03 | March 31, 2029 | 30,000 | Acquired |
| Jan. 16, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (1,200) | $4.00 | Dec. 30, 2023 | 1,200 | Disposed |
| Jan. 15, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (10,000) | $4.00 | Dec. 30, 2023 | 10,000 | Disposed |
| Jan. 14, 2019 | ALRM | Stock Option (Right to Buy) | Common Stock (18,800) | $4.00 | Dec. 30, 2023 | 18,800 | Disposed |
| Nov. 15, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $3.89 | July 11, 2022 | 15,000 | Disposed |
| Aug. 15, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $3.89 | July 11, 2022 | 15,000 | Disposed |
| June 18, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (7,193) | $3.89 | July 11, 2022 | 7,193 | Disposed |
| June 15, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (15,000) | $3.89 | July 11, 2022 | 15,000 | Disposed |
| April 1, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (30,000) | $37.74 | March 31, 2028 | 30,000 | Acquired |
| March 16, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (20,000) | $3.89 | July 11, 2022 | 20,000 | Disposed |
| March 15, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (2,500) | $21.70 | May 14, 2026 | 2,500 | Disposed |
| March 15, 2018 | ALRM | Stock Option (Right to Buy) | Common Stock (5,000) | $3.89 | July 11, 2022 | 5,000 | Disposed |
| Aug. 29, 2017 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (38,592) | $0.41 | June 30, 2019 | 38,592 | Disposed |
| May 15, 2017 | ALRM | Employee Stock Option (Right to Buy) | Common Stock (50,000) | $32.17 | May 14, 2027 | 50,000 | Acquired |
| May 15, 2016 | ALRM | Stock Option (right to buy) | Common Stock (50,000) | — | May 14, 2026 | 50,000 | Acquired |
| July 1, 2015 | ALRM | Series B-1 Preferred Stock | Common Stock (574,641) | — | — | 63,849 | Disposed |
| July 1, 2015 | ALRM | Series A Preferred Stock | Common Stock (1,566,594) | — | — | 174,066 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 25, 2015 | ALRM | Common Stock | 126,901 | Direct |
| June 25, 2015 | ALRM | Common Stock | 250,000 | Indirect |
| June 25, 2015 | ALRM | Common Stock | 250,000 | Indirect |
| June 25, 2015 | ALRM | Series A Preferred Stock→ Common Stock (1,566,594) | 1,566,594 | Indirect |
| June 25, 2015 | ALRM | Series B-1 Preferred Stock→ Common Stock (574,641) | 574,641 | Indirect |
| June 25, 2015 | ALRM | Stock Option (Right to Buy)→ Common Stock (38,592) | 38,592 | Direct |
| June 25, 2015 | ALRM | Stock Option (Right to Buy)→ Common Stock (77,193) | 77,193 | Direct |
| June 25, 2015 | ALRM | Stock Option (Right to Buy)→ Common Stock (320,000) | 320,000 | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2020 | $210,000 | — | $948,500 | $471,641 | $260,000 | — | — | $1,890,141 |
| 2019 | $210,000 | — | $1,625,750 | $947,164 | $237,500 | — | — | $3,020,414 |
| 2018 | $210,000 | — | — | — | $232,500 | — | $4,000 | $1,941,144 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.