Mark N. Tompkins
CIK 1455971 · View on SEC EDGAR ↗
Insider
First SEC filing: July 26, 2021 · Latest: July 26, 2021
On this page
Insider at
Insider transactions
0 buys (P)
66 sells (S)
Net:
$-19,832,100
+ 8 non-open-market transactions below
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
8 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 4, 2026 | ALMU | S | 5,956 | $15.12 | $90,055 | 1,790,488 Direct | -0.33% | Disposed | -2.0% (price as of 2026-08-20) |
| Feb. 4, 2026 | ALMU | S | 28,544 | $14.63 | $417,599 | 1,796,444 Direct | -1.56% | Disposed | 1.3% (price as of 2026-08-20) |
| Feb. 2, 2026 | ALMU | S | 37,500 | $15.74 | $590,250 | 1,824,988 Direct | -2.01% | Disposed | -5.8% (price as of 2026-08-20) |
| Jan. 30, 2026 | ALMU | S | 908 | $16.79 | $15,245 | 1,862,488 Direct | -0.05% | Disposed | -11.7% (price as of 2026-08-20) |
| Jan. 30, 2026 | ALMU | S | 24,092 | $15.88 | $382,581 | 1,863,396 Direct | -1.28% | Disposed | -6.6% (price as of 2026-08-20) |
| Jan. 29, 2026 | ALMU | S | 5,203 | $17.16 | $89,283 | 1,887,488 Direct | -0.27% | Disposed | -13.6% (price as of 2026-08-20) |
| Jan. 29, 2026 | ALMU | S | 27,297 | $16.75 | $457,225 | 1,892,691 Direct | -1.42% | Disposed | -11.5% (price as of 2026-08-20) |
| Jan. 22, 2026 | ALMU | S | 962 | $18.81 | $18,095 | 1,919,988 Direct | -0.05% | Disposed | -21.2% (price as of 2026-08-20) |
| Jan. 22, 2026 | ALMU | S | 29,038 | $18.05 | $524,136 | 1,920,950 Direct | -1.49% | Disposed | -17.9% (price as of 2026-08-20) |
| Jan. 21, 2026 | ALMU | S | 10 | $21.24 | $212 | 1,949,988 Direct | 0.00% | Disposed | -30.2% (price as of 2026-08-20) |
| Jan. 21, 2026 | ALMU | S | 1,715 | $20.44 | $35,055 | 1,949,998 Direct | -0.09% | Disposed | -27.5% (price as of 2026-08-20) |
| Jan. 21, 2026 | ALMU | S | 12,947 | $19.30 | $249,877 | 1,951,713 Direct | -0.66% | Disposed | -23.2% (price as of 2026-08-20) |
| Jan. 21, 2026 | ALMU | S | 30,328 | $18.52 | $561,675 | 1,964,660 Direct | -1.52% | Disposed | -20.0% (price as of 2026-08-20) |
| Jan. 20, 2026 | ALMU | S | 888 | $21.58 | $19,163 | 1,994,988 Direct | -0.04% | Disposed | -31.3% (price as of 2026-08-20) |
| Jan. 20, 2026 | ALMU | S | 29,112 | $20.66 | $601,454 | 1,995,876 Direct | -1.44% | Disposed | -28.2% (price as of 2026-08-20) |
| Dec. 26, 2025 | ALMU | S | 2,662 | $18.39 | $48,954 | 2,024,988 Direct | -0.13% | Disposed | -19.4% (price as of 2026-08-20) |
| Dec. 26, 2025 | ALMU | S | 20,368 | $18.01 | $366,828 | 2,027,650 Direct | -0.99% | Disposed | -17.7% (price as of 2026-08-20) |
| Dec. 26, 2025 | ALMU | S | 6,970 | $16.91 | $117,863 | 2,048,018 Direct | -0.34% | Disposed | -12.3% (price as of 2026-08-20) |
| Dec. 24, 2025 | ALMU | S | 15,000 | $16.05 | $240,750 | 2,054,988 Direct | -0.72% | Disposed | -7.6% (price as of 2026-08-20) |
| Dec. 23, 2025 | ALMU | S | 15,000 | $14.87 | $223,050 | 2,069,988 Direct | -0.72% | Disposed | -0.3% (price as of 2026-08-20) |
| Dec. 22, 2025 | ALMU | S | 35,000 | $14.83 | $519,050 | 2,084,988 Direct | -1.65% | Disposed | 0.0% (price as of 2026-08-20) |
| Dec. 19, 2025 | ALMU | S | 30,000 | $14.70 | $441,000 | 2,119,988 Direct | -1.40% | Disposed | 0.9% (price as of 2026-08-20) |
| Dec. 18, 2025 | ALMU | S | 20,000 | $14.37 | $287,400 | 2,149,988 Direct | -0.92% | Disposed | 3.2% (price as of 2026-08-20) |
| Dec. 10, 2025 | ALMU | S | 20,000 | $17.49 | $349,800 | 2,169,988 Direct | -0.91% | Disposed | -15.2% (price as of 2026-08-20) |
| Dec. 9, 2025 | ALMU | S | 19,139 | $17.06 | $326,511 | 2,189,988 Direct | -0.87% | Disposed | -13.1% (price as of 2026-08-20) |
| Dec. 9, 2025 | ALMU | S | 10,861 | $16.39 | $178,012 | 2,209,127 Direct | -0.49% | Disposed | -9.5% (price as of 2026-08-20) |
| Dec. 8, 2025 | ALMU | S | 988 | $16.87 | $16,668 | 2,219,988 Direct | -0.04% | Disposed | -12.1% (price as of 2026-08-20) |
| Dec. 8, 2025 | ALMU | S | 39,012 | $16.04 | $625,752 | 2,220,976 Direct | -1.73% | Disposed | -7.6% (price as of 2026-08-20) |
| Dec. 5, 2025 | ALMU | S | 1,610 | $16.49 | $26,549 | 2,259,988 Direct | -0.07% | Disposed | -10.1% (price as of 2026-08-20) |
| Dec. 5, 2025 | ALMU | S | 28,390 | $16.12 | $457,647 | 2,261,598 Direct | -1.24% | Disposed | -8.0% (price as of 2026-08-20) |
| Dec. 4, 2025 | ALMU | S | 18,500 | $16.37 | $302,845 | 2,289,988 Direct | -0.80% | Disposed | -9.4% (price as of 2026-08-20) |
| Dec. 4, 2025 | ALMU | S | 11,500 | $15.49 | $178,135 | 2,308,488 Direct | -0.50% | Disposed | -4.3% (price as of 2026-08-20) |
| Oct. 20, 2025 | ALMU | S | 37,500 | $16.39 | $614,625 | 2,319,988 Direct | -1.59% | Disposed | -9.5% (price as of 2026-08-20) |
| Oct. 17, 2025 | ALMU | S | 743 | $18.45 | $13,708 | 2,357,488 Direct | -0.03% | Disposed | -19.6% (price as of 2026-08-20) |
| Oct. 17, 2025 | ALMU | S | 5,913 | $17.77 | $105,074 | 2,358,231 Direct | -0.25% | Disposed | -16.6% (price as of 2026-08-20) |
| Oct. 17, 2025 | ALMU | S | 33,344 | $16.75 | $558,512 | 2,364,144 Direct | -1.39% | Disposed | -11.5% (price as of 2026-08-20) |
| Oct. 16, 2025 | ALMU | S | 810 | $20.72 | $16,783 | 2,397,488 Direct | -0.03% | Disposed | -28.5% (price as of 2026-08-20) |
| Oct. 16, 2025 | ALMU | S | 6,650 | $19.96 | $132,734 | 2,398,298 Direct | -0.28% | Disposed | -25.7% (price as of 2026-08-20) |
| Oct. 16, 2025 | ALMU | S | 17,540 | $18.97 | $332,734 | 2,404,948 Direct | -0.72% | Disposed | -21.9% (price as of 2026-08-20) |
| Oct. 15, 2025 | ALMU | S | 15,853 | $21.31 | $337,827 | 2,422,488 Direct | -0.65% | Disposed | -30.4% (price as of 2026-08-20) |
| Oct. 15, 2025 | ALMU | S | 24,147 | $20.11 | $485,596 | 2,438,341 Direct | -0.98% | Disposed | -26.3% (price as of 2026-08-20) |
| Oct. 14, 2025 | ALMU | S | 36,855 | $19.86 | $731,940 | 2,462,488 Direct | -1.47% | Disposed | -25.4% (price as of 2026-08-20) |
| Oct. 13, 2025 | ALMU | S | 300 | $17.57 | $5,271 | 2,499,343 Direct | -0.01% | Disposed | -15.6% (price as of 2026-08-20) |
| Oct. 13, 2025 | ALMU | S | 35,031 | $16.97 | $594,476 | 2,499,643 Direct | -1.38% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 10, 2025 | ALMU | S | 4,413 | $17.16 | $75,727 | 2,534,674 Direct | -0.17% | Disposed | -13.6% (price as of 2026-08-20) |
| Oct. 10, 2025 | ALMU | S | 30,587 | $16.60 | $507,744 | 2,539,087 Direct | -1.19% | Disposed | -10.7% (price as of 2026-08-20) |
| Oct. 9, 2025 | ALMU | S | 1,000 | $17.25 | $17,250 | 2,569,674 Direct | -0.04% | Disposed | -14.1% (price as of 2026-08-20) |
| Oct. 9, 2025 | ALMU | S | 35,908 | $16.54 | $593,918 | 2,570,674 Direct | -1.38% | Disposed | -10.4% (price as of 2026-08-20) |
| Oct. 8, 2025 | ALMU | S | 700 | $18.14 | $12,698 | 2,606,582 Direct | -0.03% | Disposed | -18.3% (price as of 2026-08-20) |
| Oct. 8, 2025 | ALMU | S | 34,300 | $17.46 | $598,878 | 2,607,282 Direct | -1.30% | Disposed | -15.1% (price as of 2026-08-20) |
| Oct. 7, 2025 | ALMU | S | 400 | $19.16 | $7,664 | 2,641,582 Direct | -0.02% | Disposed | -22.6% (price as of 2026-08-20) |
| Oct. 7, 2025 | ALMU | S | 7,907 | $18.66 | $147,545 | 2,641,982 Direct | -0.30% | Disposed | -20.6% (price as of 2026-08-20) |
| Oct. 7, 2025 | ALMU | S | 26,693 | $17.46 | $466,060 | 2,649,889 Direct | -1.00% | Disposed | -15.1% (price as of 2026-08-20) |
| Oct. 6, 2025 | ALMU | S | 63,604 | $18.70 | $1,189,395 | 2,676,582 Direct | -2.32% | Disposed | -20.7% (price as of 2026-08-20) |
| Oct. 3, 2025 | ALMU | S | 18,189 | $17.30 | $314,670 | 2,753,144 Direct | -0.66% | Disposed | -14.3% (price as of 2026-08-20) |
| Oct. 3, 2025 | ALMU | S | 12,958 | $17.94 | $232,467 | 2,740,186 Direct | -0.47% | Disposed | -17.4% (price as of 2026-08-20) |
| Oct. 2, 2025 | ALMU | S | 120 | $17.58 | $2,110 | 2,771,333 Direct | 0.00% | Disposed | -15.7% (price as of 2026-08-20) |
| Oct. 2, 2025 | ALMU | S | 34,880 | $17.10 | $596,448 | 2,771,453 Direct | -1.24% | Disposed | -13.3% (price as of 2026-08-20) |
| Oct. 1, 2025 | ALMU | S | 41,367 | $16.97 | $701,998 | 2,806,333 Direct | -1.45% | Disposed | -12.6% (price as of 2026-08-20) |
| Oct. 1, 2025 | ALMU | S | 9,133 | $16.39 | $149,690 | 2,847,700 Direct | -0.32% | Disposed | -9.5% (price as of 2026-08-20) |
| Sept. 30, 2025 | ALMU | S | 33,800 | $16.18 | $546,884 | 2,857,033 Direct | -1.17% | Disposed | -8.4% (price as of 2026-08-20) |
| Sept. 30, 2025 | ALMU | S | 200 | $17.54 | $3,508 | 2,856,833 Direct | -0.01% | Disposed | -15.5% (price as of 2026-08-20) |
| Sept. 30, 2025 | ALMU | S | 33,380 | $16.18 | $540,088 | 2,857,033 Direct | -1.15% | Disposed | -8.4% (price as of 2026-08-20) |
| Sept. 29, 2025 | ALMU | S | 1,618 | $18.36 | $29,706 | 2,890,833 Direct | -0.06% | Disposed | -19.3% (price as of 2026-08-20) |
| Sept. 29, 2025 | ALMU | S | 23,382 | $17.52 | $409,653 | 2,892,451 Direct | -0.80% | Disposed | -15.4% (price as of 2026-08-20) |
| Aug. 26, 2025 | FISN | S | 25,000 | — | — | 4,725,000 Direct | -0.53% | Disposed | (price as of 2026-08-20) |
| Dec. 22, 2022 | ALMU | P | 83,333 | $3.00 | $249,999 | 2,715,833 Direct | +3.17% | Acquired | 394.2% (price as of 2026-08-20) |
| June 25, 2021 | ALMU | P | 107,500 | $2.00 | $215,000 | 2,632,500 Direct | +4.26% | Acquired | 641.3% (price as of 2026-08-20) |
| June 22, 2021 | ALMU | P | 250,000 | $2.00 | $500,000 | 2,525,000 Direct | +10.99% | Acquired | 641.3% (price as of 2026-08-20) |
| June 1, 2021 | AMST | S | 35,822 | $2.50 | $89,555 | 2,043,103 Direct | -1.72% | Disposed | -96.9% (price as of 2026-08-20) |
| May 28, 2021 | AMST | S | 17,494 | $2.39 | $41,811 | 2,078,925 Direct | -0.83% | Disposed | -96.7% (price as of 2026-08-20) |
| May 27, 2021 | AMST | S | 13,600 | $2.38 | $32,368 | 2,096,419 Direct | -0.64% | Disposed | -96.7% (price as of 2026-08-20) |
| May 26, 2021 | AMST | S | 22,444 | $2.27 | $50,948 | 2,110,019 Direct | -1.05% | Disposed | -96.5% (price as of 2026-08-20) |
| May 25, 2021 | AMST | S | 11,453 | $2.24 | $25,655 | 2,132,463 Direct | -0.53% | Disposed | -96.5% (price as of 2026-08-20) |
| May 24, 2021 | AMST | S | 10,243 | $2.25 | $23,047 | 2,143,916 Direct | -0.48% | Disposed | -96.5% (price as of 2026-08-20) |
| May 21, 2021 | AMST | S | 3,191 | $2.20 | $7,020 | 2,154,159 Direct | -0.15% | Disposed | -96.4% (price as of 2026-08-20) |
| May 20, 2021 | AMST | S | 56,437 | $2.21 | $124,726 | 2,157,350 Direct | -2.55% | Disposed | -96.5% (price as of 2026-08-20) |
| May 19, 2021 | AMST | S | 44,400 | $2.23 | $99,012 | 2,213,786 Direct | -1.97% | Disposed | -96.5% (price as of 2026-08-20) |
| May 18, 2021 | AMST | S | 16,430 | $2.19 | $35,982 | 2,258,186 Direct | -0.72% | Disposed | -96.4% (price as of 2026-08-20) |
| May 17, 2021 | AMST | S | 7,395 | $2.22 | $16,417 | 2,275 Direct | -76.47% | Disposed | -96.5% (price as of 2026-08-20) |
| May 14, 2021 | AMST | S | 40,109 | $2.36 | $94,657 | 2,282,012 Direct | -1.73% | Disposed | -96.7% (price as of 2026-08-20) |
| May 13, 2021 | AMST | S | 53,610 | $2.30 | $123,303 | 2,322,121 Direct | -2.26% | Disposed | -96.6% (price as of 2026-08-20) |
| May 12, 2021 | AMST | S | 13,705 | $2.22 | $30,425 | 2,375,731 Direct | -0.57% | Disposed | -96.5% (price as of 2026-08-20) |
| May 11, 2021 | AMST | S | 11,311 | $2.31 | $26,128 | 2,389,436 Direct | -0.47% | Disposed | -96.6% (price as of 2026-08-20) |
| May 10, 2021 | AMST | S | 12,600 | $2.50 | $31,500 | 2,400,747 Direct | -0.52% | Disposed | -96.9% (price as of 2026-08-20) |
| May 7, 2021 | AMST | S | 12,711 | $2.69 | $34,193 | 2,413,347 Direct | -0.52% | Disposed | -97.1% (price as of 2026-08-20) |
| May 6, 2021 | AMST | S | 13,777 | $2.66 | $36,647 | 2,426,058 Direct | -0.56% | Disposed | -97.1% (price as of 2026-08-20) |
| May 5, 2021 | AMST | S | 10,385 | $2.61 | $27,105 | 2,439,835 Direct | -0.42% | Disposed | -97.0% (price as of 2026-08-20) |
| May 4, 2021 | AMST | S | 51,971 | $2.96 | $153,834 | 2,450,220 Direct | -2.08% | Disposed | -97.4% (price as of 2026-08-20) |
| May 3, 2021 | AMST | S | 16,234 | $2.90 | $47,079 | — Direct | — | Disposed | -97.3% (price as of 2026-08-20) |
| April 30, 2021 | AMST | S | 28,655 | $2.72 | $77,942 | — Direct | — | Disposed | -97.1% (price as of 2026-08-20) |
| April 29, 2021 | AMST | S | 16,169 | $2.61 | $42,201 | — Direct | — | Disposed | -97.0% (price as of 2026-08-20) |
Showing latest 100 of 122 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 |
|---|---|---|---|---|---|---|---|
| March 27, 2025 | ALMU | Convertible Promissory Note | Common Stock (200,000) | — | March 27, 2025 | — | Disposed |
| July 31, 2023 | SERV | Warrants (Right to Buy) | Common stock (156,250) | $3.20 | July 31, 2026 | 156,250 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 7 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 20, 2022 | FISN | Common Stock | 4,750,000 | Direct |
| July 26, 2021 | SERV | Common Stock | 4,750,000 | Direct |
| Dec. 1, 2020 | ALMU | Common Stock | 4,750,000 | Direct |
| Oct. 28, 2020 | SMTK | Common stock, par value $0.0001 per share | 4,750,000 | Direct |
| Sept. 25, 2020 | AMST | Common stock, par value $0.0001 per share | 2,900,667 | Direct |
| July 30, 2018 | CMPX | Common Stock, par value $0.0001 | 4,750,000 | Direct |
| May 22, 2017 | XCUR | Common Shares, par value $0.0001 per share | 900,000 | Direct |