Stephen Cotton
Insider
First SEC filing: May 9, 2018 · Latest: May 9, 2018
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 24, 2026 | AQMS | A | 104,818 | · | · | 318,784 Direct | +48.99% | Acquired | (price as of 2026-10-05) |
| Aug. 19, 2026 | AQMS | F | 3,305 | $2.67 | $8,824 | 213,966 Direct | -1.52% | Disposed | -21.3% (price as of 2026-10-05) |
| July 1, 2026 | AQMS | F | 2,402 | $2.97 | $7,134 | 217,271 Direct | -1.09% | Disposed | -29.3% (price as of 2026-10-05) |
| April 13, 2026 | AQMS | F | 2,352 | $3.92 | $9,220 | 219,673 Direct | -1.06% | Disposed | -46.4% (price as of 2026-10-05) |
| Feb. 24, 2026 | AQMS | F | 3,307 | $4.76 | $15,741 | 222,025 Direct | -1.47% | Disposed | -55.9% (price as of 2026-10-05) |
| Feb. 13, 2026 | AQMS | A | 79,873 | $4.72 | $377,001 | 225,332 Direct | +54.91% | Acquired | -55.5% (price as of 2026-10-05) |
| Jan. 7, 2026 | AQMS | D | 2,100 | · | · | 145,459 Direct | -1.42% | Disposed | (price as of 2026-10-05) |
| Jan. 7, 2026 | AQMS | D | 1,510 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 7, 2026 | AQMS | D | 1,510 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 7, 2026 | AQMS | D | 1,510 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 7, 2026 | AQMS | D | 4,530 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 2, 2026 | AQMS | F | 3,208 | $4.80 | $15,398 | 147,559 Direct | -2.13% | Disposed | -56.3% (price as of 2026-10-05) |
| Dec. 18, 2025 | AQMS | A | 14,749 | · | · | 157,014 Direct | +10.37% | Acquired | (price as of 2026-10-05) |
| Dec. 18, 2025 | AQMS | F | 6,247 | $5.46 | $34,109 | 150,767 Direct | -3.98% | Disposed | -61.5% (price as of 2026-10-05) |
| Oct. 13, 2025 | AQMS | A | 33,320 | $9.58 | $319,206 | 142,265 Direct | +30.58% | Acquired | -78.1% (price as of 2026-10-05) |
| Sept. 19, 2025 | AQMS | A | 11,250 | · | · | 115,369 Direct | +10.80% | Acquired | (price as of 2026-10-05) |
| Sept. 19, 2025 | AQMS | F | 4,765 | $4.12 | $19,632 | 110,604 Direct | -4.13% | Disposed | -49.0% (price as of 2026-10-05) |
| Aug. 20, 2025 | AQMS | F | 1,920 | $3.68 | $7,066 | 104,119 Direct | -1.81% | Disposed | -42.9% (price as of 2026-10-05) |
| Aug. 19, 2025 | AQMS | A | 46,824 | $3.95 | $184,955 | 106,039 Direct | +79.07% | Acquired | -46.8% (price as of 2026-10-05) |
| July 1, 2025 | AQMS | F | 9,301 | $0.49 | $4,557 | 592,154 Direct | -1.55% | Disposed | -57.1% (price as of 2026-10-05) |
| Feb. 20, 2025 | AQMS | A | 37,103 | · | · | 601,455 Direct | +6.57% | Acquired | (price as of 2026-10-05) |
| Jan. 1, 2025 | AQMS | F | 13,337 | $2.52 | $33,609 | 564,352 Direct | -2.31% | Disposed | -91.7% (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | A | 271,927 | · | · | 577,689 Direct | +88.93% | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | A | 15,107 | · | · | 15,107 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | A | 15,107 | · | · | 15,107 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | A | 15,107 | · | · | 15,107 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | A | 45,321 | · | · | 45,321 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 19, 2024 | AQMS | P | 175,000 | · | · | 175,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 1, 2024 | AQMS | F | 236,986 | $0.32 | $75,836 | 6,115,247 Direct | -3.73% | Disposed | -96.7% (price as of 2026-10-05) |
| May 14, 2024 | AQMS | P | 250,000 | $0.39 | $97,500 | 6,352,233 Direct | +4.10% | Acquired | -97.3% (price as of 2026-10-05) |
| May 14, 2024 | AQMS | P | 250,000 | $0.01 | $2,500 | 250,000 Direct | · | Acquired | 5.0% (price as of 2026-10-05) |
| Jan. 2, 2024 | AQMS | F | 220,103 | $0.79 | $173,881 | 6,202,233 Direct | -3.43% | Disposed | -98.7% (price as of 2026-10-05) |
| Dec. 12, 2023 | AQMS | A | 1,365,000 | · | · | 5,902,606 Direct | +30.08% | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | AQMS | A | 100,000 | · | · | 6,002,606 Direct | +1.69% | Acquired | (price as of 2026-10-05) |
| Dec. 12, 2023 | AQMS | A | 420,000 | · | · | 6,422,606 Direct | +7.00% | Acquired | (price as of 2026-10-05) |
| July 6, 2023 | AQMS | D 10b5-1 | 37,633 | $1.11 | $41,773 | 4,537,606 Direct | -0.82% | Disposed | -99.1% (price as of 2026-10-05) |
| July 5, 2023 | AQMS | D 10b5-1 | 62,367 | $1.16 | $72,346 | 4,575,239 Direct | -1.34% | Disposed | -99.1% (price as of 2026-10-05) |
| July 3, 2023 | AQMS | F | 209,102 | $1.21 | $253,013 | 4,637,606 Direct | -4.31% | Disposed | -99.1% (price as of 2026-10-05) |
| March 23, 2023 | AQMS | F | 82,636 | $1.05 | $86,768 | 4,846,708 Direct | -1.68% | Disposed | -99.0% (price as of 2026-10-05) |
| Jan. 3, 2023 | AQMS | F | 228,732 | $1.15 | $263,042 | 4,929,074 Direct | -4.43% | Disposed | -99.1% (price as of 2026-10-05) |
| Dec. 22, 2022 | AQMS | A | 100,000 | $0.63 | $63,000 | 5,157,806 Direct | +1.98% | Acquired | -98.3% (price as of 2026-10-05) |
| Dec. 12, 2022 | AQMS | A | 1,270,589 | · | · | 5,057,806 Direct | +33.55% | Acquired | (price as of 2026-10-05) |
| July 8, 2022 | AQMS | S | 283,758 | $0.77 | $218,494 | 3,787,217 Direct | -6.97% | Disposed | -98.6% (price as of 2026-10-05) |
| March 24, 2022 | AQMS | S | 100,605 | $1.41 | $141,853 | 4,070,975 Direct | -2.41% | Disposed | -99.3% (price as of 2026-10-05) |
| Jan. 5, 2022 | AQMS | S | 124,474 | $1.27 | $158,082 | 4,171,580 Direct | -2.90% | Disposed | -99.2% (price as of 2026-10-05) |
| Dec. 13, 2021 | AQMS | A | 722,334 | · | · | 4,296,054 Direct | +20.21% | Acquired | (price as of 2026-10-05) |
| July 2, 2021 | AQMS | S | 193,173 | $2.71 | $523,499 | 1,483,354 Direct | -11.52% | Disposed | -99.6% (price as of 2026-10-05) |
| March 24, 2021 | AQMS | S | 87,660 | $3.88 | $340,121 | 1,215,213 Direct | -6.73% | Disposed | -99.7% (price as of 2026-10-05) |
| March 2, 2021 | AQMS | M | 187,461 | $1.88 | $352,427 | 1,280,334 Direct | +17.15% | Acquired | -99.4% (price as of 2026-10-05) |
| March 2, 2021 | AQMS | S | 187,461 | $5.02 | $941,054 | 1,092,873 Direct | -14.64% | Disposed | -99.8% (price as of 2026-10-05) |
| March 2, 2021 | AQMS | M | 187,461 | · | · | 2,971,680 Direct | -5.93% | Disposed | (price as of 2026-10-05) |
| March 1, 2021 | AQMS | M | 45,000 | $1.88 | $84,600 | 1,137,873 Direct | +4.12% | Acquired | -99.4% (price as of 2026-10-05) |
| March 1, 2021 | AQMS | S | 45,000 | $5.15 | $231,750 | 1,092,873 Direct | -3.95% | Disposed | -99.8% (price as of 2026-10-05) |
| March 1, 2021 | AQMS | M | 45,000 | · | · | 3,159,141 Direct | -1.40% | Disposed | (price as of 2026-10-05) |
| Jan. 4, 2021 | AQMS | S | 69,874 | $3.36 | $234,777 | 1,092,873 Direct | -6.01% | Disposed | -99.7% (price as of 2026-10-05) |
| Dec. 16, 2020 | AQMS | A | 969,828 | · | · | 3,840,346 Direct | +33.79% | Acquired | (price as of 2026-10-05) |
| Aug. 7, 2020 | AQMS | P | 721 | $1.04 | $750 | 863,071 Direct | +0.08% | Acquired | -99.0% (price as of 2026-10-05) |
| July 24, 2020 | AQMS | P | 670 | $1.12 | $750 | 862,350 Direct | +0.08% | Acquired | -99.1% (price as of 2026-10-05) |
| July 10, 2020 | AQMS | P | 676 | $1.11 | $750 | 861,680 Direct | +0.08% | Acquired | -99.1% (price as of 2026-10-05) |
| July 2, 2020 | AQMS | S | 169,606 | $1.15 | $195,047 | 861,004 Direct | -16.46% | Disposed | -99.1% (price as of 2026-10-05) |
| June 26, 2020 | AQMS | P | 682 | $1.10 | $750 | 730,933 Direct | +0.09% | Acquired | -99.0% (price as of 2026-10-05) |
| June 12, 2020 | AQMS | P | 872 | $0.86 | $750 | 730,251 Direct | +0.12% | Acquired | -98.8% (price as of 2026-10-05) |
| June 8, 2020 | AQMS | P | 50,069 | $0.87 | $43,560 | 729,379 Direct | +7.37% | Acquired | -98.8% (price as of 2026-10-05) |
| May 19, 2020 | AQMS | A | 1,316,250 | · | · | 2,870,518 Direct | +84.69% | Acquired | (price as of 2026-10-05) |
| March 23, 2020 | AQMS | S | 13,315 | $0.39 | $5,193 | 679,310 Direct | -1.92% | Disposed | -97.3% (price as of 2026-10-05) |
| March 23, 2020 | AQMS | A | 630,000 | · | · | 1,309,310 Direct | +92.74% | Acquired | (price as of 2026-10-05) |
| March 23, 2020 | AQMS | D | 420,000 | · | · | 1,986,166 Direct | -17.46% | Disposed | (price as of 2026-10-05) |
| March 23, 2020 | AQMS | D | 420,000 | · | · | 1,566,166 Direct | -21.15% | Disposed | (price as of 2026-10-05) |
| March 23, 2020 | AQMS | D | 420,000 | · | · | 1,146,166 Direct | -26.82% | Disposed | (price as of 2026-10-05) |
| March 23, 2020 | AQMS | A | 371,250 | · | · | 1,517,416 Direct | +32.39% | Acquired | (price as of 2026-10-05) |
| Jan. 7, 2020 | AQMS | S | 4,918 | $0.80 | $3,934 | 633,211 Direct | -0.77% | Disposed | -98.7% (price as of 2026-10-05) |
| Jan. 3, 2020 | AQMS | S | 197,090 | $0.71 | $139,934 | 619,703 Direct | -24.13% | Disposed | -98.5% (price as of 2026-10-05) |
| Jan. 2, 2020 | AQMS | A | 700,000 | · | · | 816,793 Direct | +599.35% | Acquired | (price as of 2026-10-05) |
| Sept. 23, 2019 | AQMS | A | 59,414 | · | · | 2,484,006 Direct | +2.45% | Acquired | (price as of 2026-10-05) |
| July 6, 2019 | AQMS | F | 7,533 | $1.83 | $13,785 | 208,924 Direct | -3.48% | Disposed | -99.4% (price as of 2026-10-05) |
| June 14, 2019 | AQMS | P | 10,000 | $1.50 | $15,000 | 216,457 Direct | +4.84% | Acquired | -99.3% (price as of 2026-10-05) |
| Feb. 25, 2019 | AQMS | A | 420,000 | · | · | 1,492,461 Direct | +39.16% | Acquired | (price as of 2026-10-05) |
| Feb. 25, 2019 | AQMS | A | 420,000 | · | · | 1,912,461 Direct | +28.14% | Acquired | (price as of 2026-10-05) |
| Feb. 25, 2019 | AQMS | A | 420,000 | · | · | 2,332,461 Direct | +21.96% | Acquired | (price as of 2026-10-05) |
| Jan. 17, 2019 | AQMS | P | 15,000 | $1.90 | $28,500 | 206,457 Direct | +7.83% | Acquired | -99.4% (price as of 2026-10-05) |
| Jan. 4, 2019 | AQMS | A | 232,461 | · | · | 232,461 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2019 | AQMS | A | 110,557 | · | · | 191,457 Direct | +136.66% | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2019 | AQMS | A | 232,461 | · | · | 232,461 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 13, 2018 | AQMS | P | 6,400 | $2.49 | $15,936 | 80,900 Direct | +8.59% | Acquired | -99.6% (price as of 2026-10-05) |
| June 18, 2018 | AQMS | P | 30,000 | $2.85 | $85,500 | 74,500 Direct | +67.42% | Acquired | -99.6% (price as of 2026-10-05) |
| April 19, 2017 | AQMS | S 10b5-1 | 4,415 | $17.26 | $76,203 | 93,291 Direct | -4.52% | Disposed | -99.9% (price as of 2026-10-05) |
| March 22, 2017 | AQMS | S 10b5-1 | 4,415 | $17.84 | $78,764 | 97,706 Direct | -4.32% | Disposed | -99.9% (price as of 2026-10-05) |
| Dec. 30, 2016 | AQMS | G | 3,000 | · | · | 102,121 Direct | -2.85% | Disposed | (price as of 2026-10-05) |
| Jan. 8, 2016 | AQMS | A | 22,248 | · | · | 22,248 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 24, 2015 | AQMS | P | 2,500 | $4.73 | $11,825 | 105,121 Direct | +2.44% | Acquired | -99.8% (price as of 2026-10-05) |
| Aug. 21, 2015 | AQMS | P | 2,500 | $4.95 | $12,375 | 102,621 Direct | +2.50% | Acquired | -99.8% (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 |
|---|---|---|---|---|---|---|---|
| Jan. 7, 2026 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2025 | 1,510 | Disposed |
| Jan. 7, 2026 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2026 | 1,510 | Disposed |
| Jan. 7, 2026 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2027 | 1,510 | Disposed |
| Jan. 7, 2026 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2027 | 4,530 | Disposed |
| Dec. 19, 2024 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2025 | 15,107 | Acquired |
| Dec. 19, 2024 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2026 | 15,107 | Acquired |
| Dec. 19, 2024 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2027 | 15,107 | Acquired |
| Dec. 19, 2024 | AQMS | Performance Share Units | Common Stock | $0.00 | Dec. 31, 2027 | 45,321 | Acquired |
| Dec. 19, 2024 | AQMS | Common Stock Purchase Warrant (right to buy) | Common Stock | $1.92 | Dec. 19, 2029 | 175,000 | Acquired |
| May 14, 2024 | AQMS | Non-Redeemable Common Stock Purchase Warrant | Common Stock | $0.39 | May 17, 2029 | 250,000 | Acquired |
| March 2, 2021 | AQMS | Employee Stock Option (right to buy) | Common Stock | $1.88 | July 4, 2021 | 187,461 | Disposed |
| March 1, 2021 | AQMS | Employee Stock Option (right to buy) | Common Stock | $1.88 | July 4, 2021 | 45,000 | Disposed |
| Dec. 16, 2020 | AQMS | Restricted Stock Units | Common Shares | $0.00 | · | 969,828 | Acquired |
| May 19, 2020 | AQMS | Restricted Stock Units | Common Shares | $0.00 | · | 1,316,250 | Acquired |
| March 23, 2020 | AQMS | Stock Options | Common Shares | $3.08 | Feb. 25, 2024 | 420,000 | Disposed |
| March 23, 2020 | AQMS | Stock Options | Common Shares | $3.68 | Feb. 25, 2024 | 420,000 | Disposed |
| March 23, 2020 | AQMS | Stock Options | Common Shares | $4.18 | Feb. 25, 2024 | 420,000 | Disposed |
| March 23, 2020 | AQMS | Restricted Stock Units | Common Shares | $0.00 | · | 371,250 | Acquired |
| Sept. 23, 2019 | AQMS | Restricted Share Units | Common Shares | $0.00 | March 20, 2020 | 59,414 | Acquired |
| Feb. 25, 2019 | AQMS | Stock Options | Common Shares | $3.08 | Feb. 25, 2024 | 420,000 | Acquired |
| Feb. 25, 2019 | AQMS | Stock Options | Common Shares | $3.68 | Feb. 25, 2024 | 420,000 | Acquired |
| Feb. 25, 2019 | AQMS | Stock Options | Common Shares | $4.18 | Feb. 25, 2024 | 420,000 | Acquired |
| Jan. 4, 2019 | AQMS | Employee Stock Option (right to buy) | Common Stock | $1.88 | Jan. 4, 2021 | 232,461 | Acquired |
| Jan. 4, 2019 | AQMS | Employee Stock Option | Common Stock | $1.88 | Jan. 4, 2021 | 232,461 | Acquired |
| Jan. 8, 2016 | AQMS | Employee Stock Option (Right to Buy) | Common Stock | $5.07 | Dec. 17, 2020 | 22,248 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| May 9, 2018 | AQMS | Common Stock | 44,500 | Direct |
| May 9, 2018 | AQMS | Employee Stock Option (right to buy) | 210,000 | Direct |
| May 9, 2018 | AQMS | Employee Stock Option (right to buy) | 210,000 | Direct |
| May 9, 2018 | AQMS | Employee Stock Option (right to buy) | 420,000 | Direct |
| July 30, 2015 | AQMS | Common Stock | 100,121 | Direct |
| July 30, 2015 | AQMS | Employee Stock Option (Right to Buy) | 286,364 | 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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | $511 | $358 | · | · | · | · | · | $1,460 |
| 2023 | $488 | $553 | · | · | · | · | · | $2,463 |
| 2022 | $472 | $473 | · | · | · | · | · | $1,782 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.