John Joseph Johnston
Insider
First SEC filing: July 29, 2021 · Latest: July 29, 2021
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 |
|---|---|---|---|---|---|---|---|---|---|
| June 17, 2026 | MXCT | A | 30,421 | · | · | 201,581 Direct | +17.77% | Acquired | (price as of 2026-10-05) |
| June 17, 2026 | MXCT | A | 49,579 | · | · | 49,579 Direct | · | Acquired | (price as of 2026-10-05) |
| June 18, 2025 | MXCT | A | 50,790 | · | · | 50,790 Direct | · | Acquired | (price as of 2026-10-05) |
| June 18, 2025 | MXCT | A | 29,210 | · | · | 171,160 Direct | +20.58% | Acquired | (price as of 2026-10-05) |
| Jan. 27, 2025 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| Jan. 27, 2025 | MXCT | S 10b5-1 | 3,000 | $4.64 | $13,920 | 141,950 Direct | -2.07% | Disposed | -76.7% (price as of 2026-10-05) |
| Jan. 27, 2025 | MXCT | M 10b5-1 | 3,000 | · | · | 17,417 Direct | -14.69% | Disposed | (price as of 2026-10-05) |
| Dec. 26, 2024 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| Dec. 26, 2024 | MXCT | S 10b5-1 | 3,000 | $4.01 | $12,030 | 141,950 Direct | -2.07% | Disposed | -73.1% (price as of 2026-10-05) |
| Dec. 26, 2024 | MXCT | M 10b5-1 | 3,000 | · | · | 20,417 Direct | -12.81% | Disposed | (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 891 | $2.93 | $2,611 | 142,841 Direct | +0.63% | Acquired | -63.1% (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 1,121 | $1.64 | $1,838 | 143,962 Direct | +0.78% | Acquired | -34.1% (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 483 | $2.93 | $1,415 | 144,445 Direct | +0.34% | Acquired | -63.1% (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | S 10b5-1 | 2,495 | $3.79 | $9,456 | 141,950 Direct | -1.73% | Disposed | -71.5% (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 891 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 1,121 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 9, 2024 | MXCT | M 10b5-1 | 483 | · | · | 23,417 Direct | -2.02% | Disposed | (price as of 2026-10-05) |
| Dec. 6, 2024 | MXCT | M 10b5-1 | 505 | $2.93 | $1,480 | 142,455 Direct | +0.36% | Acquired | -63.1% (price as of 2026-10-05) |
| Dec. 6, 2024 | MXCT | S 10b5-1 | 505 | $3.70 | $1,868 | 141,950 Direct | -0.35% | Disposed | -70.8% (price as of 2026-10-05) |
| Dec. 6, 2024 | MXCT | M 10b5-1 | 505 | · | · | 891 Direct | -36.17% | Disposed | (price as of 2026-10-05) |
| Oct. 28, 2024 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| Oct. 28, 2024 | MXCT | S 10b5-1 | 3,000 | $3.72 | $11,160 | 141,950 Direct | -2.07% | Disposed | -71.0% (price as of 2026-10-05) |
| Oct. 28, 2024 | MXCT | M 10b5-1 | 3,000 | · | · | 1,396 Direct | -68.24% | Disposed | (price as of 2026-10-05) |
| Sept. 26, 2024 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| Sept. 26, 2024 | MXCT | S 10b5-1 | 3,000 | $3.82 | $11,460 | 141,950 Direct | -2.07% | Disposed | -71.7% (price as of 2026-10-05) |
| Sept. 26, 2024 | MXCT | M 10b5-1 | 3,000 | · | · | 4,396 Direct | -40.56% | Disposed | (price as of 2026-10-05) |
| Aug. 26, 2024 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| Aug. 26, 2024 | MXCT | S 10b5-1 | 3,000 | $4.28 | $12,840 | 141,950 Direct | -2.07% | Disposed | -74.8% (price as of 2026-10-05) |
| Aug. 26, 2024 | MXCT | M 10b5-1 | 3,000 | · | · | 7,396 Direct | -28.86% | Disposed | (price as of 2026-10-05) |
| July 26, 2024 | MXCT | M 10b5-1 | 3,000 | $2.93 | $8,790 | 144,950 Direct | +2.11% | Acquired | -63.1% (price as of 2026-10-05) |
| July 26, 2024 | MXCT | S 10b5-1 | 3,000 | $4.75 | $14,250 | 141,950 Direct | -2.07% | Disposed | -77.3% (price as of 2026-10-05) |
| July 26, 2024 | MXCT | M 10b5-1 | 3,000 | · | · | 10,396 Direct | -22.39% | Disposed | (price as of 2026-10-05) |
| June 27, 2024 | MXCT | M 10b5-1 | 5,044 | $1.64 | $8,272 | 146,994 Direct | +3.55% | Acquired | -34.1% (price as of 2026-10-05) |
| June 27, 2024 | MXCT | M 10b5-1 | 4,956 | $2.93 | $14,521 | 151,950 Direct | +3.37% | Acquired | -63.1% (price as of 2026-10-05) |
| June 27, 2024 | MXCT | S 10b5-1 | 10,000 | $3.99 | $39,900 | 141,950 Direct | -6.58% | Disposed | -72.9% (price as of 2026-10-05) |
| June 27, 2024 | MXCT | M 10b5-1 | 5,044 | · | · | 1,121 Direct | -81.82% | Disposed | (price as of 2026-10-05) |
| June 27, 2024 | MXCT | M 10b5-1 | 4,956 | · | · | 13,396 Direct | -27.01% | Disposed | (price as of 2026-10-05) |
| June 11, 2024 | MXCT | A | 21,367 | · | · | 141,950 Direct | +17.72% | Acquired | (price as of 2026-10-05) |
| June 11, 2024 | MXCT | A | 40,701 | · | · | 40,701 Direct | · | Acquired | (price as of 2026-10-05) |
| March 26, 2024 | MXCT | M 10b5-1 | 5,000 | $2.14 | $10,700 | 125,583 Direct | +4.15% | Acquired | -49.5% (price as of 2026-10-05) |
| March 26, 2024 | MXCT | S 10b5-1 | 5,000 | $4.40 | $22,000 | 120,583 Direct | -3.98% | Disposed | -75.5% (price as of 2026-10-05) |
| March 26, 2024 | MXCT | M | 5,000 | · | · | 617 Direct | -89.02% | Disposed | (price as of 2026-10-05) |
| Feb. 26, 2024 | MXCT | M 10b5-1 | 5,000 | $2.14 | $10,700 | 125,583 Direct | +4.15% | Acquired | -49.5% (price as of 2026-10-05) |
| Feb. 26, 2024 | MXCT | S 10b5-1 | 5,000 | $4.60 | $23,000 | 120,583 Direct | -3.98% | Disposed | -76.5% (price as of 2026-10-05) |
| Feb. 26, 2024 | MXCT | M | 5,000 | · | · | 5,617 Direct | -47.09% | Disposed | (price as of 2026-10-05) |
| Jan. 26, 2024 | MXCT | M 10b5-1 | 5,000 | $2.14 | $10,700 | 125,583 Direct | +4.15% | Acquired | -49.5% (price as of 2026-10-05) |
| Jan. 26, 2024 | MXCT | S 10b5-1 | 5,000 | $5.12 | $25,600 | 120,583 Direct | -3.98% | Disposed | -78.9% (price as of 2026-10-05) |
| Jan. 26, 2024 | MXCT | M 10b5-1 | 5,000 | · | · | 10,617 Direct | -32.02% | Disposed | (price as of 2026-10-05) |
| Dec. 26, 2023 | MXCT | M 10b5-1 | 5,000 | · | · | 15,617 Direct | -24.25% | Disposed | (price as of 2026-10-05) |
| Dec. 26, 2023 | MXCT | S 10b5-1 | 5,000 | $4.53 | $22,650 | 120,583 Direct | -3.98% | Disposed | -76.2% (price as of 2026-10-05) |
| Dec. 26, 2023 | MXCT | M 10b5-1 | 5,000 | $2.14 | $10,700 | 125,583 Direct | +4.15% | Acquired | -49.5% (price as of 2026-10-05) |
| Nov. 27, 2023 | MXCT | M 10b5-1 | 5,000 | · | · | 20,617 Direct | -19.52% | Disposed | (price as of 2026-10-05) |
| Nov. 27, 2023 | MXCT | S 10b5-1 | 5,000 | $4.59 | $22,950 | 120,583 Direct | -3.98% | Disposed | -76.5% (price as of 2026-10-05) |
| Nov. 27, 2023 | MXCT | M 10b5-1 | 5,000 | $2.14 | $10,700 | 125,583 Direct | +4.15% | Acquired | -49.5% (price as of 2026-10-05) |
| Nov. 14, 2023 | MXCT | M 10b5-1 | 1,283 | · | · | 25,617 Direct | -4.77% | Disposed | (price as of 2026-10-05) |
| Nov. 14, 2023 | MXCT | M 10b5-1 | 8,717 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 14, 2023 | MXCT | S 10b5-1 | 10,000 | $3.71 | $37,100 | 120,583 Direct | -7.66% | Disposed | -70.9% (price as of 2026-10-05) |
| Nov. 14, 2023 | MXCT | M 10b5-1 | 1,283 | $2.14 | $2,746 | 130,583 Direct | +0.99% | Acquired | -49.5% (price as of 2026-10-05) |
| Nov. 14, 2023 | MXCT | M 10b5-1 | 8,717 | $1.64 | $14,296 | 129,300 Direct | +7.23% | Acquired | -34.1% (price as of 2026-10-05) |
| Aug. 30, 2023 | MXCT | M 10b5-1 | 2,841 | · | · | 8,717 Direct | -24.58% | Disposed | (price as of 2026-10-05) |
| Aug. 30, 2023 | MXCT | S 10b5-1 | 2,841 | $3.70 | $10,512 | 120,583 Direct | -2.30% | Disposed | -70.8% (price as of 2026-10-05) |
| Aug. 30, 2023 | MXCT | M 10b5-1 | 2,841 | $1.64 | $4,659 | 123,424 Direct | +2.36% | Acquired | -34.1% (price as of 2026-10-05) |
| Aug. 29, 2023 | MXCT | M 10b5-1 | 2,059 | · | · | 11,558 Direct | -15.12% | Disposed | (price as of 2026-10-05) |
| Aug. 29, 2023 | MXCT | S 10b5-1 | 2,059 | $3.70 | $7,618 | 120,583 Direct | -1.68% | Disposed | -70.8% (price as of 2026-10-05) |
| Aug. 29, 2023 | MXCT | M 10b5-1 | 2,059 | $1.64 | $3,377 | 122,642 Direct | +1.71% | Acquired | -34.1% (price as of 2026-10-05) |
| Aug. 28, 2023 | MXCT | M 10b5-1 | 100 | · | · | 13,617 Direct | -0.73% | Disposed | (price as of 2026-10-05) |
| Aug. 28, 2023 | MXCT | S 10b5-1 | 100 | $3.70 | $370 | 120,583 Direct | -0.08% | Disposed | -70.8% (price as of 2026-10-05) |
| Aug. 28, 2023 | MXCT | M 10b5-1 | 100 | $1.64 | $164 | 120,683 Direct | +0.08% | Acquired | -34.1% (price as of 2026-10-05) |
| July 26, 2023 | MXCT | M 10b5-1 | 5,000 | · | · | 13,717 Direct | -26.71% | Disposed | (price as of 2026-10-05) |
| July 26, 2023 | MXCT | S 10b5-1 | 5,000 | $4.75 | $23,750 | 120,583 Direct | -3.98% | Disposed | -77.3% (price as of 2026-10-05) |
| July 26, 2023 | MXCT | M 10b5-1 | 5,000 | $1.64 | $8,200 | 125,583 Direct | +4.15% | Acquired | -34.1% (price as of 2026-10-05) |
| June 27, 2023 | MXCT | S 10b5-1 | 7,471 | $4.39 | $32,798 | 120,583 Direct | -5.83% | Disposed | -75.4% (price as of 2026-10-05) |
| June 27, 2023 | MXCT | M 10b5-1 | 7,471 | · | · | 18,717 Direct | -28.53% | Disposed | (price as of 2026-10-05) |
| June 27, 2023 | MXCT | M 10b5-1 | 7,471 | $1.64 | $12,252 | 128,054 Direct | +6.20% | Acquired | -34.1% (price as of 2026-10-05) |
| June 26, 2023 | MXCT | M 10b5-1 | 712 | · | · | 26,188 Direct | -2.65% | Disposed | (price as of 2026-10-05) |
| June 26, 2023 | MXCT | M 10b5-1 | 6,817 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 26, 2023 | MXCT | S 10b5-1 | 7,529 | $4.49 | $33,805 | 120,583 Direct | -5.88% | Disposed | -75.9% (price as of 2026-10-05) |
| June 26, 2023 | MXCT | M 10b5-1 | 712 | $1.64 | $1,168 | 128,112 Direct | +0.56% | Acquired | -34.1% (price as of 2026-10-05) |
| June 26, 2023 | MXCT | M 10b5-1 | 6,817 | $0.98 | $6,681 | 127,400 Direct | +5.65% | Acquired | 10.2% (price as of 2026-10-05) |
| June 22, 2023 | MXCT | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 29, 2022 | MXCT | A | 26,900 | · | · | 26,900 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 9, 2021 | MXCT | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| June 17, 2026 | MXCT | Stock Option (right to buy) | Common Stock | $1.13 | June 16, 2036 | 49,579 | Acquired |
| June 18, 2025 | MXCT | Stock Option (right to buy) | Common Stock | $2.11 | June 17, 2035 | 50,790 | Acquired |
| Jan. 27, 2025 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 18, 2028 | 3,000 | Disposed |
| Dec. 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 18, 2028 | 3,000 | Disposed |
| Dec. 9, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 891 | Disposed |
| Dec. 9, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 1,121 | Disposed |
| Dec. 9, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 18, 2028 | 483 | Disposed |
| Dec. 6, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 505 | Disposed |
| Oct. 28, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 3,000 | Disposed |
| Sept. 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 3,000 | Disposed |
| Aug. 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 3,000 | Disposed |
| July 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 3,000 | Disposed |
| June 27, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 5,044 | Disposed |
| June 27, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.93 | July 14, 2027 | 4,956 | Disposed |
| June 11, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $4.68 | June 10, 2034 | 40,701 | Acquired |
| March 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 5,000 | Disposed |
| Feb. 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 5,000 | Disposed |
| Jan. 26, 2024 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 5,000 | Disposed |
| Dec. 26, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 5,000 | Disposed |
| Nov. 27, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 5,000 | Disposed |
| Nov. 14, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $2.14 | March 4, 2029 | 1,283 | Disposed |
| Nov. 14, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 8,717 | Disposed |
| Aug. 30, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 2,841 | Disposed |
| Aug. 29, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 2,059 | Disposed |
| Aug. 28, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 100 | Disposed |
| July 26, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 5,000 | Disposed |
| June 27, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 7,471 | Disposed |
| June 26, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $1.64 | Jan. 20, 2030 | 712 | Disposed |
| June 26, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $0.98 | June 13, 2026 | 6,817 | Disposed |
| June 22, 2023 | MXCT | Stock Option (right to buy) | Common Stock | $4.57 | June 21, 2033 | 50,000 | Acquired |
| June 29, 2022 | MXCT | Stock Option (right to buy) | Common Stock | $4.82 | June 28, 2032 | 26,900 | Acquired |
| Aug. 9, 2021 | MXCT | Stock Option (right to buy) | Common Stock | $16.63 | Aug. 9, 2031 | 10,000 | 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 |
|---|---|---|---|---|
| July 29, 2021 | MXCT | Common Stock | 120,583 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 6,817 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 23,900 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 23,900 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 26,900 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 26,900 | Direct |
| July 29, 2021 | MXCT | Stock Option (right to buy) | 26,900 | Direct |