Justin E Mirro
Insider
First SEC filing: March 1, 2022 · Latest: March 1, 2022
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 5, 2024 | AMPX | S | 110,000 | $0.80 | $88,000 | 2,073,042 Indirect | -5.04% | Disposed | 1108.7% (price as of 2026-10-02) |
| Sept. 5, 2024 | AMPX | S | 140,000 | $0.81 | $113,400 | 1,195,000 Indirect | -10.49% | Disposed | 1093.8% (price as of 2026-10-02) |
| Sept. 4, 2024 | AMPX | S | 150,000 | $0.94 | $141,000 | 2,183,042 Indirect | -6.43% | Disposed | 928.7% (price as of 2026-10-02) |
| Sept. 4, 2024 | AMPX | S | 175,000 | $0.94 | $164,500 | 1,335,000 Indirect | -11.59% | Disposed | 928.7% (price as of 2026-10-02) |
| Sept. 3, 2024 | AMPX | S | 60,000 | $1.00 | $60,000 | 2,333,042 Indirect | -2.51% | Disposed | 867.0% (price as of 2026-10-02) |
| Sept. 3, 2024 | AMPX | S | 75,000 | $1.00 | $75,000 | 1,510,000 Indirect | -4.73% | Disposed | 867.0% (price as of 2026-10-02) |
| July 23, 2024 | AMPX | A | 925,900 | · | · | 2,393,042 Indirect | +63.11% | Acquired | (price as of 2026-10-02) |
| July 23, 2024 | AMPX | D | 4,700,000 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 14, 2024 | AMPX | S | 195,000 | $1.13 | $220,350 | 1,467,142 Indirect | -11.73% | Disposed | 755.8% (price as of 2026-10-02) |
| June 14, 2024 | AMPX | S | 65,000 | $1.13 | $73,450 | 1,585,000 Indirect | -3.94% | Disposed | 755.8% (price as of 2026-10-02) |
| June 13, 2024 | AMPX | S | 195,000 | $1.21 | $235,950 | 1,662,142 Indirect | -10.50% | Disposed | 699.2% (price as of 2026-10-02) |
| June 13, 2024 | AMPX | S | 65,000 | $1.22 | $79,300 | 1,650,000 Indirect | -3.79% | Disposed | 692.6% (price as of 2026-10-02) |
| June 12, 2024 | AMPX | S | 210,000 | $1.30 | $273,000 | 1,857,142 Indirect | -10.16% | Disposed | 643.8% (price as of 2026-10-02) |
| June 12, 2024 | AMPX | S | 70,000 | $1.30 | $91,000 | 1,715,000 Indirect | -3.92% | Disposed | 643.8% (price as of 2026-10-02) |
| June 7, 2024 | AMPX | A | 125,000 | · | · | 142,895 Direct | +698.52% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2023 | AMPX | S | 170,000 | $3.56 | $605,200 | 2,067,142 Indirect | -7.60% | Disposed | 171.6% (price as of 2026-10-02) |
| Dec. 14, 2023 | AMPX | S | 85,000 | $3.56 | $302,600 | 1,785,000 Indirect | -4.55% | Disposed | 171.6% (price as of 2026-10-02) |
| Dec. 13, 2023 | AMPX | S | 60,000 | $3.68 | $220,800 | 2,237,142 Indirect | -2.61% | Disposed | 162.8% (price as of 2026-10-02) |
| Dec. 13, 2023 | AMPX | S | 30,000 | $3.68 | $110,400 | 1,870,000 Indirect | -1.58% | Disposed | 162.8% (price as of 2026-10-02) |
| Dec. 12, 2023 | AMPX | S | 40,000 | $3.81 | $152,400 | 2,297,142 Indirect | -1.71% | Disposed | 153.8% (price as of 2026-10-02) |
| Dec. 12, 2023 | AMPX | S | 20,000 | $3.81 | $76,200 | 1,900,000 Indirect | -1.04% | Disposed | 153.8% (price as of 2026-10-02) |
| Dec. 7, 2023 | AMPX | S | 20,000 | $3.88 | $77,600 | 2,337,142 Indirect | -0.85% | Disposed | 149.2% (price as of 2026-10-02) |
| Dec. 7, 2023 | AMPX | S | 10,000 | $3.88 | $38,800 | 1,920,000 Indirect | -0.52% | Disposed | 149.2% (price as of 2026-10-02) |
| Dec. 6, 2023 | AMPX | S | 20,000 | $4.05 | $81,000 | 2,357,142 Indirect | -0.84% | Disposed | 138.8% (price as of 2026-10-02) |
| Dec. 6, 2023 | AMPX | S | 10,000 | $4.05 | $40,500 | 1,930,000 Indirect | -0.52% | Disposed | 138.8% (price as of 2026-10-02) |
| Dec. 5, 2023 | AMPX | S | 20,000 | $4.33 | $86,600 | 2,377,142 Indirect | -0.83% | Disposed | 123.3% (price as of 2026-10-02) |
| Dec. 5, 2023 | AMPX | S | 10,000 | $4.31 | $43,100 | 1,940,000 Indirect | -0.51% | Disposed | 124.4% (price as of 2026-10-02) |
| Nov. 30, 2023 | AMPX | S | 30,000 | $4.19 | $125,700 | 2,397,142 Indirect | -1.24% | Disposed | 130.8% (price as of 2026-10-02) |
| Nov. 30, 2023 | AMPX | S | 15,000 | $4.18 | $62,700 | 1,950,000 Indirect | -0.76% | Disposed | 131.3% (price as of 2026-10-02) |
| Nov. 29, 2023 | AMPX | S | 40,000 | $4.01 | $160,400 | 2,427,142 Indirect | -1.62% | Disposed | 141.1% (price as of 2026-10-02) |
| Nov. 29, 2023 | AMPX | S | 20,000 | $4.01 | $80,200 | 1,965,000 Indirect | -1.01% | Disposed | 141.1% (price as of 2026-10-02) |
| Nov. 28, 2023 | AMPX | S | 30,000 | $3.71 | $111,300 | 2,467,142 Indirect | -1.20% | Disposed | 160.6% (price as of 2026-10-02) |
| Nov. 28, 2023 | AMPX | S | 15,000 | $3.70 | $55,500 | 1,985,000 Indirect | -0.75% | Disposed | 161.4% (price as of 2026-10-02) |
| June 15, 2023 | AMPX | S | 61,000 | $8.85 | $539,850 | 2,497,142 Indirect | -2.38% | Disposed | 9.3% (price as of 2026-10-02) |
| June 14, 2023 | AMPX | S | 50,000 | $9.50 | $475,000 | 2,558,142 Indirect | -1.92% | Disposed | 1.8% (price as of 2026-10-02) |
| June 9, 2023 | AMPX | A | 17,895 | · | · | 17,895 Direct | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | A | 200,000 | $0.50 | $100,000 | 200,000 Direct | · | Acquired | 1834.0% (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | A | 111,000 | · | · | 111,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | J | 4,700,000 | · | · | 4,700,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | C | 9,857,142 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | J | 1,000,000 | · | · | 1,000,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | J | 1,000,000 | · | · | 1,000,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | A | 111,000 | · | · | 2,608,142 Indirect | +4.45% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | J | 2,497,142 | · | · | 2,497,142 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | J | 13,124,642 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 14, 2022 | AMPX | C | 9,857,142 | · | · | 13,124,642 Indirect | +301.67% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 910 | · | · | 10,451 Direct | +9.54% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 956 | · | · | 11,407 Direct | +9.15% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 2,596 | · | · | 14,003 Direct | +22.76% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 12,699 | · | · | 26,702 Direct | +90.69% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 4,052 | · | · | 30,754 Direct | +15.17% | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 910 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 956 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 2,596 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 12,699 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 19, 2022 | CPS | M | 4,052 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 7, 2022 | QS | S 10b5-1 | 3,148 | $21.64 | $68,123 | 1,184,056 Indirect | -0.27% | Disposed | -78.9% (price as of 2026-10-02) |
| Jan. 7, 2022 | QS | S 10b5-1 | 46,852 | $21.03 | $985,298 | 1,187,204 Indirect | -3.80% | Disposed | -78.3% (price as of 2026-10-02) |
| Dec. 15, 2021 | QS | A | 5,294 | · | · | 5,294 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 7, 2021 | QS | S 10b5-1 | 50,000 | $26.24 | $1,312,000 | 1,234,056 Indirect | -3.89% | Disposed | -82.6% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 5,065 | $38.14 | $193,179 | 1,284,056 Indirect | -0.39% | Disposed | -88.0% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 13,762 | $37.52 | $516,350 | 1,289,121 Indirect | -1.06% | Disposed | -87.8% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 5,963 | $36.23 | $216,039 | 1,302,883 Indirect | -0.46% | Disposed | -87.4% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 4,645 | $35.29 | $163,922 | 1,308,846 Indirect | -0.35% | Disposed | -87.1% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 6,085 | $34.28 | $208,594 | 1,313,491 Indirect | -0.46% | Disposed | -86.7% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 10,675 | $33.29 | $355,371 | 1,319,576 Indirect | -0.80% | Disposed | -86.3% (price as of 2026-10-02) |
| Nov. 8, 2021 | QS | S 10b5-1 | 3,805 | $32.07 | $122,026 | 1,330,251 Indirect | -0.29% | Disposed | -85.7% (price as of 2026-10-02) |
| Oct. 7, 2021 | QS | S 10b5-1 | 20,000 | $22.97 | $459,400 | 1,334,056 Indirect | -1.48% | Disposed | -80.1% (price as of 2026-10-02) |
| Sept. 30, 2021 | QS | X | 379,357 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 30, 2021 | QS | S | 186,437 | $23.40 | $4,362,626 | 1,354,056 Indirect | -12.10% | Disposed | -80.5% (price as of 2026-10-02) |
| Sept. 30, 2021 | QS | X | 379,357 | $11.50 | $4,362,606 | 1,540,493 Indirect | +32.67% | Acquired | -60.3% (price as of 2026-10-02) |
| Sept. 10, 2021 | QS | X | 500,000 | · | · | 379,357 Indirect | -56.86% | Disposed | (price as of 2026-10-02) |
| Sept. 10, 2021 | QS | S | 263,762 | $21.80 | $5,750,012 | 1,161,136 Indirect | -18.51% | Disposed | -79.0% (price as of 2026-10-02) |
| Sept. 10, 2021 | QS | X | 500,000 | $11.50 | $5,750,000 | 1,424,898 Indirect | +54.06% | Acquired | -60.3% (price as of 2026-10-02) |
| Sept. 7, 2021 | QS | S 10b5-1 | 20,000 | $22.17 | $443,400 | 924,898 Indirect | -2.12% | Disposed | -79.4% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 2,458 | $23.40 | $57,517 | 250,000 Indirect | -0.97% | Disposed | -80.5% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 47,542 | $22.92 | $1,089,663 | 252,458 Indirect | -15.85% | Disposed | -80.1% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 1,834 | $23.43 | $42,971 | 250,000 Indirect | -0.73% | Disposed | -80.5% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 48,166 | $22.93 | $1,104,446 | 251,834 Indirect | -16.06% | Disposed | -80.1% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 10,258 | $23.40 | $240,037 | 944,898 Indirect | -1.07% | Disposed | -80.5% (price as of 2026-10-02) |
| July 30, 2021 | QS | S 10b5-1 | 189,742 | $22.92 | $4,348,887 | 955,156 Indirect | -16.57% | Disposed | -80.1% (price as of 2026-10-02) |
| May 20, 2021 | CPS | A | 4,052 | · | · | 4,052 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 75,000 | · | · | 75,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 804,357 | · | · | 804,357 Indirect | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | C | 5,750,000 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 300,000 | · | · | 300,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 300,000 | · | · | 300,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 1,144,898 | · | · | 1,144,898 Indirect | · | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | J | 1,744,898 | · | · | 4,005,102 Indirect | -30.35% | Disposed | (price as of 2026-10-02) |
| Nov. 25, 2020 | QS | C | 5,750,000 | · | · | 5,750,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 21, 2020 | CPS | A | 12,699 | · | · | 12,699 Direct | · | Acquired | (price as of 2026-10-02) |
| March 2, 2020 | CPS | P | 5,000 | $15.67 | $78,350 | 9,541 Direct | +110.11% | Acquired | 39.3% (price as of 2026-10-02) |
| May 16, 2019 | CPS | A | 2,596 | · | · | 2,596 Direct | · | Acquired | (price as of 2026-10-02) |
| May 17, 2018 | CPS | A | 956 | · | · | 956 Direct | · | Acquired | (price as of 2026-10-02) |
| May 18, 2017 | CPS | M | 1,256 | $107.24 | $134,693 | 4,541 Direct | +38.23% | Acquired | -79.6% (price as of 2026-10-02) |
| May 18, 2017 | CPS | M | 1,256 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 18, 2017 | CPS | A | 910 | · | · | 910 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2016 | CPS | A | 1,256 | · | · | 1,256 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2016 | CPS | A | 1,256 | · | · | 1,256 Direct | · | Acquired | (price as of 2026-10-02) |
| May 9, 2016 | CPS | M | 1,285 | $84.09 | $108,056 | 3,285 Direct | +64.25% | Acquired | -74.0% (price as of 2026-10-02) |
Showing latest 100 of 102 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 |
|---|---|---|---|---|---|---|---|
| July 23, 2024 | AMPX | Warrants (right to buy) | Common Stock | · | Sept. 14, 2027 | 4,700,000 | Disposed |
| Sept. 14, 2022 | AMPX | Warrants (right to buy) | Common Stock | $11.50 | Sept. 14, 2027 | 200,000 | Acquired |
| Sept. 14, 2022 | AMPX | Warrants (right to buy) | Common Stock | $12.50 | Sept. 14, 2027 | 111,000 | Acquired |
| Sept. 14, 2022 | AMPX | Warrants (right to buy) | Common Stock | $11.50 | Sept. 14, 2027 | 4,700,000 | Acquired |
| Sept. 14, 2022 | AMPX | Class B Ordinary Shares | Common Stock | · | · | 9,857,142 | Disposed |
| May 19, 2022 | CPS | Restricted Stock Units [F3] | Common stock | · | · | 910 | Disposed |
| May 19, 2022 | CPS | Restricted Stock Units [F5] | Common stock | · | · | 956 | Disposed |
| May 19, 2022 | CPS | Restricted Stock Units [F6] | Common stock | · | · | 2,596 | Disposed |
| May 19, 2022 | CPS | Restricted Stock Units [F7] | Common stock | · | · | 12,699 | Disposed |
| May 19, 2022 | CPS | Restricted Stock Units [F8] | Common stock | · | · | 4,052 | Disposed |
| Sept. 30, 2021 | QS | Warrant (right to buy) | Class A Common Stock | $11.50 | · | 379,357 | Disposed |
| Sept. 10, 2021 | QS | Warrant (right to buy) | Class A Common Stock | $11.50 | · | 500,000 | Disposed |
| May 20, 2021 | CPS | Restricted Stock Units [F1] | Common stock | · | · | 4,052 | Acquired |
| Nov. 25, 2020 | QS | Working Capital Warrants | Class A Common Stock | · | · | 75,000 | Acquired |
| Nov. 25, 2020 | QS | Private Placement Warrants | Class A Common Stock | · | · | 804,357 | Acquired |
| Nov. 25, 2020 | QS | Class B Common Stock | Class A Common Stock | · | · | 5,750,000 | Disposed |
| May 21, 2020 | CPS | Restricted Stock Units [F1] | Common stock | · | · | 12,699 | Acquired |
| May 16, 2019 | CPS | Restricted Stock Units [F1] | Common stock | · | · | 2,596 | Acquired |
| May 17, 2018 | CPS | Restricted Stock Units [F1] | Common stock | · | May 17, 2019 | 956 | Acquired |
| May 18, 2017 | CPS | Restricted Stock Units [F1] | Common stock | $107.24 | May 19, 2017 | 1,256 | Disposed |
| May 18, 2017 | CPS | Restricted Stock Units [F3] | Common stock | · | May 18, 2018 | 910 | Acquired |
| May 19, 2016 | CPS | Restricted Stock Units [F1] | Common stock | $85.02 | May 19, 2017 | 1,256 | Acquired |
| May 19, 2016 | CPS | Restricted Stock Units [F1] | Restricted Stock Units | $85.02 | May 19, 2017 | 1,256 | Acquired |
| May 9, 2016 | CPS | Restricted Stock Units | Common stock | $84.09 | May 9, 2016 | 1,285 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.