David H Wang
CIK 1721580 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 2, 2017 · Latest: June 5, 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
0 buys (P)
23 sells (S)
Net:
$-21,811,057
+ 48 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
48 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 4, 2026 | ACMR | S 10b5-1 | 826 | $87.91 | $72,614 | 802,708 Direct | -0.10% | Disposed | -9.0% (price as of 2026-08-19) |
| June 4, 2026 | ACMR | S 10b5-1 | 8,581 | $87.13 | $747,663 | 803,534 Direct | -1.06% | Disposed | -8.2% (price as of 2026-08-19) |
| June 4, 2026 | ACMR | S 10b5-1 | 10,992 | $86.07 | $946,081 | 812,115 Direct | -1.34% | Disposed | -7.0% (price as of 2026-08-19) |
| June 4, 2026 | ACMR | S 10b5-1 | 17,543 | $85.11 | $1,493,085 | 823,107 Direct | -2.09% | Disposed | -6.0% (price as of 2026-08-19) |
| June 4, 2026 | ACMR | S 10b5-1 | 2,060 | $83.86 | $172,752 | 840,650 Direct | -0.24% | Disposed | -4.6% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 1,187 | $93.04 | $110,438 | 802,708 Direct | -0.15% | Disposed | -14.0% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 5,843 | $92.38 | $539,776 | 803,895 Direct | -0.72% | Disposed | -13.4% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 9,925 | $90.78 | $900,992 | 809,738 Direct | -1.21% | Disposed | -11.9% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 32,450 | $89.84 | $2,915,308 | 819,663 Direct | -3.81% | Disposed | -10.9% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 6,295 | $88.98 | $560,129 | 852,113 Direct | -0.73% | Disposed | -10.1% (price as of 2026-08-19) |
| June 3, 2026 | ACMR | S 10b5-1 | 4,300 | $87.57 | $376,551 | 858,408 Direct | -0.50% | Disposed | -8.6% (price as of 2026-08-19) |
| March 12, 2026 | ACMR | S 10b5-1 | 702 | $46.57 | $32,692 | 802,708 Direct | -0.09% | Disposed | 71.8% (price as of 2026-08-19) |
| March 12, 2026 | ACMR | S 10b5-1 | 38,737 | $45.74 | $1,771,830 | 803,410 Direct | -4.60% | Disposed | 74.9% (price as of 2026-08-19) |
| March 12, 2026 | ACMR | S 10b5-1 | 10,561 | $44.92 | $474,400 | 842,147 Direct | -1.24% | Disposed | 78.1% (price as of 2026-08-19) |
| March 11, 2026 | ACMR | S 10b5-1 | 4,627 | $48.34 | $223,669 | 802,708 Direct | -0.57% | Disposed | 65.5% (price as of 2026-08-19) |
| March 11, 2026 | ACMR | S 10b5-1 | 55,373 | $47.89 | $2,651,813 | 807,335 Direct | -6.42% | Disposed | 67.1% (price as of 2026-08-19) |
| Dec. 4, 2025 | ACMR | S 10b5-1 | 40,183 | $34.42 | $1,383,099 | 802,708 Direct | -4.77% | Disposed | 132.4% (price as of 2026-08-19) |
| Dec. 4, 2025 | ACMR | S 10b5-1 | 19,817 | $33.52 | $664,266 | 842,891 Direct | -2.30% | Disposed | 138.7% (price as of 2026-08-19) |
| Dec. 3, 2025 | ACMR | S 10b5-1 | 1,200 | $33.56 | $40,272 | 802,708 Direct | -0.15% | Disposed | 138.4% (price as of 2026-08-19) |
| Dec. 3, 2025 | ACMR | S 10b5-1 | 68,800 | $33.05 | $2,273,840 | 803,908 Direct | -7.88% | Disposed | 142.1% (price as of 2026-08-19) |
| Sept. 4, 2025 | ACMR | S 10b5-1 | 60,000 | $26.44 | $1,586,400 | 672,708 Direct | -8.19% | Disposed | 202.6% (price as of 2026-08-19) |
| Sept. 3, 2025 | ACMR | S 10b5-1 | 3,943 | $27.31 | $107,683 | 672,708 Direct | -0.58% | Disposed | 193.0% (price as of 2026-08-19) |
| Sept. 3, 2025 | ACMR | S 10b5-1 | 66,057 | $26.73 | $1,765,704 | 676,651 Direct | -8.89% | Disposed | 199.3% (price as of 2026-08-19) |
| May 22, 2025 | ACMR | S 10b5-1 | 60,000 | $22.63 | $1,357,800 | 672,708 Direct | -8.19% | Disposed | 253.5% (price as of 2026-08-19) |
| May 21, 2025 | ACMR | S 10b5-1 | 8 | $24.04 | $192 | 672,708 Direct | 0.00% | Disposed | 232.8% (price as of 2026-08-19) |
| May 21, 2025 | ACMR | S 10b5-1 | 69,992 | $23.60 | $1,651,811 | 672,716 Direct | -9.42% | Disposed | 239.0% (price as of 2026-08-19) |
| March 13, 2025 | ACMR | S 10b5-1 | 1,019 | $27.65 | $28,175 | 672,708 Direct | -0.15% | Disposed | 189.4% (price as of 2026-08-19) |
| March 13, 2025 | ACMR | S 10b5-1 | 36,481 | $27.29 | $995,566 | 673,727 Direct | -5.14% | Disposed | 193.2% (price as of 2026-08-19) |
| March 12, 2025 | ACMR | S 10b5-1 | 37,500 | $27.42 | $1,028,250 | 710,208 Direct | -5.02% | Disposed | 191.8% (price as of 2026-08-19) |
| March 11, 2025 | ACMR | S 10b5-1 | 56,250 | $26.57 | $1,494,562 | 747,708 Direct | -7.00% | Disposed | 201.1% (price as of 2026-08-19) |
| Nov. 29, 2024 | ACMR | S 10b5-1 | 56,250 | $17.44 | $981,000 | 598,006 Direct | -8.60% | Disposed | 358.7% (price as of 2026-08-19) |
| Nov. 26, 2024 | ACMR | S 10b5-1 | 9,484 | $18.31 | $173,652 | 654,256 Direct | -1.43% | Disposed | 337.0% (price as of 2026-08-19) |
| Nov. 26, 2024 | ACMR | S 10b5-1 | 46,766 | $17.80 | $832,435 | 663,740 Direct | -6.58% | Disposed | 349.5% (price as of 2026-08-19) |
| Nov. 22, 2024 | ACMR | S 10b5-1 | 56,250 | $19.08 | $1,073,250 | 710,506 Direct | -7.34% | Disposed | 319.3% (price as of 2026-08-19) |
| May 29, 2024 | ACMR | S 10b5-1 | 41,090 | $22.62 | $929,456 | 504,018 Direct | -7.54% | Disposed | 253.7% (price as of 2026-08-19) |
| May 29, 2024 | ACMR | S 10b5-1 | 45,000 | $22.62 | $1,017,900 | 545,108 Direct | -7.63% | Disposed | 253.7% (price as of 2026-08-19) |
| May 22, 2024 | ACMR | S 10b5-1 | 45,000 | $22.81 | $1,026,450 | 590,108 Direct | -7.09% | Disposed | 250.7% (price as of 2026-08-19) |
| May 22, 2024 | ACMR | S 10b5-1 | 45,000 | $22.81 | $1,026,450 | 635,108 Direct | -6.62% | Disposed | 250.7% (price as of 2026-08-19) |
| March 14, 2024 | ACMR | S 10b5-1 | 10,611 | $28.38 | $301,140 | 504,018 Direct | -2.06% | Disposed | 181.9% (price as of 2026-08-19) |
| March 14, 2024 | ACMR | S 10b5-1 | 76,478 | $27.51 | $2,103,910 | 514,629 Direct | -12.94% | Disposed | 190.8% (price as of 2026-08-19) |
| March 8, 2024 | ACMR | S 10b5-1 | 45,000 | $30.35 | $1,365,750 | 591,107 Direct | -7.07% | Disposed | 163.6% (price as of 2026-08-19) |
| March 8, 2024 | ACMR | S 10b5-1 | 45,000 | $30.36 | $1,366,200 | 636,107 Direct | -6.61% | Disposed | 163.5% (price as of 2026-08-19) |
| Nov. 29, 2023 | ACMR | S 10b5-1 | 39,776 | $17.13 | $681,363 | 504,018 Direct | -7.31% | Disposed | 367.1% (price as of 2026-08-19) |
| Nov. 29, 2023 | ACMR | S 10b5-1 | 45,000 | $17.14 | $771,300 | 543,794 Direct | -7.64% | Disposed | 366.8% (price as of 2026-08-19) |
| Nov. 22, 2023 | ACMR | S 10b5-1 | 45,000 | $17.68 | $795,600 | 588,794 Direct | -7.10% | Disposed | 352.5% (price as of 2026-08-19) |
| Nov. 22, 2023 | ACMR | S 10b5-1 | 45,000 | $17.67 | $795,150 | 633,794 Direct | -6.63% | Disposed | 352.8% (price as of 2026-08-19) |
| Sept. 13, 2023 | ACMR | S 10b5-1 | 85,116 | $17.68 | $1,504,851 | 504,018 Direct | -14.45% | Disposed | 352.5% (price as of 2026-08-19) |
| Sept. 12, 2023 | ACMR | S 10b5-1 | 3,573 | $18.72 | $66,887 | 589,134 Direct | -0.60% | Disposed | 327.4% (price as of 2026-08-19) |
| Sept. 12, 2023 | ACMR | S 10b5-1 | 86,427 | $18.03 | $1,558,279 | 592,707 Direct | -12.73% | Disposed | 343.7% (price as of 2026-08-19) |
| March 19, 2021 | ACMR | S 10b5-1 | 49,228 | $90.55 | $4,457,595 | 168,006 Direct | -22.66% | Disposed | 165.1% (price as of 2026-08-19) |
| March 18, 2021 | ACMR | S 10b5-1 | 50,000 | $91.92 | $4,596,000 | 217,234 Direct | -18.71% | Disposed | 161.1% (price as of 2026-08-19) |
| Dec. 4, 2020 | ACMR | S 10b5-1 | 49,322 | $77.14 | $3,804,699 | 168,006 Direct | -22.69% | Disposed | 211.1% (price as of 2026-08-19) |
Showing latest 100 of 116 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 |
|---|---|---|---|---|---|---|---|
| June 4, 2026 | ACMR | Stock Option | Class A Common Stock (40,002) | $1.00 | Dec. 27, 2026 | 40,002 | Disposed |
| June 3, 2026 | ACMR | Stock Option | Class A Common Stock (60,000) | $1.00 | Dec. 27, 2026 | 60,000 | Disposed |
| May 13, 2026 | ACMR | Restricted Stock Units | Class A Common Stock (6,208) | — | — | 6,208 | Acquired |
| March 12, 2026 | ACMR | Stock Option | Class A Common Stock (50,000) | $1.00 | Dec. 27, 2026 | 50,000 | Disposed |
| March 11, 2026 | ACMR | Stock Option | Class A Common Stock (60,000) | $1.00 | Dec. 27, 2026 | 60,000 | Disposed |
| Feb. 4, 2026 | ACMR | Stock Option | Class A Common Stock (545,400) | $7.36 | March 19, 2030 | 545,400 | Acquired |
| Dec. 4, 2025 | ACMR | Stock Option | Class A Common Stock (60,000) | $1.00 | Dec. 27, 2026 | 60,000 | Disposed |
| Dec. 3, 2025 | ACMR | Stock Option | Class A Common Stock (70,000) | $1.00 | Dec. 27, 2026 | 70,000 | Disposed |
| Oct. 27, 2025 | ACMR | Stock Option | Class A Common Stock (545,400) | $7.36 | March 19, 2030 | 545,400 | Acquired |
| Sept. 8, 2025 | ACMR | Stock Option | Class A Common Stock (130,000) | $1.00 | Dec. 27, 2026 | 130,000 | Disposed |
| Sept. 4, 2025 | ACMR | Stock Option | Class A Common Stock (60,000) | $1.00 | Dec. 27, 2026 | 60,000 | Disposed |
| Sept. 3, 2025 | ACMR | Stock Option | Class A Common Stock (70,000) | $1.00 | Dec. 27, 2026 | 70,000 | Disposed |
| May 22, 2025 | ACMR | Stock Option | Class A Common Stock (60,000) | $1.00 | Dec. 27, 2026 | 60,000 | Disposed |
| May 21, 2025 | ACMR | Stock Option | Class A Common Stock (70,000) | $1.00 | Dec. 27, 2026 | 70,000 | Disposed |
| March 3, 2025 | ACMR | Stock Option | Class A Common Stock (210,000) | $0.50 | April 30, 2025 | 210,000 | Disposed |
| Nov. 14, 2024 | ACMR | Stock Option | Class A Common Stock (270,000) | $0.50 | April 30, 2025 | 270,000 | Acquired |
| May 14, 2024 | ACMR | Stock Option | Class A Common Stock (180,000) | $0.50 | April 30, 2025 | 180,000 | Disposed |
| March 1, 2024 | ACMR | Stock Option | Class A Common Stock (180,000) | $0.50 | April 30, 2025 | 180,000 | Disposed |
| Nov. 14, 2023 | ACMR | Stock Option | Class A Common Stock (180,000) | $0.50 | April 30, 2025 | 180,000 | Disposed |
| Sept. 4, 2023 | ACMR | Stock Option | Class A Common Stock (180,000) | $0.50 | April 30, 2025 | 180,000 | Disposed |
| Aug. 10, 2023 | ACMR | Stock Option | Class A Common Stock (1,080,000) | — | Aug. 9, 2033 | 1,080,000 | Disposed |
| Aug. 10, 2023 | ACMR | Stock Option | Class A Common Stock (1,080,000) | $13.24 | Aug. 9, 2033 | 1,080,000 | Disposed |
| March 12, 2021 | ACMR | Stock Option | Class A Common Stock (100,001) | $0.75 | May 1, 2021 | 100,001 | Disposed |
| Nov. 25, 2020 | ACMR | Stock Option | Class A Common Stock (66,666) | $0.75 | May 1, 2021 | 66,666 | Disposed |
| Nov. 25, 2020 | ACMR | Stock Option | Class A Common Stock (33,334) | $0.75 | May 1, 2021 | 33,334 | Disposed |
| Aug. 27, 2020 | ACMR | Stock Option | Class A Common Stock (70,000) | $0.75 | May 1, 2021 | 70,000 | Disposed |
| Aug. 5, 2020 | ACMR | Class A Common Stock | Class A Common Stock (181,799) | $22.07 | March 19, 2030 | 181,799 | Acquired |
| May 21, 2020 | ACMR | Class B Common Stock | Class A Common Stock (33,334) | — | — | 33,334 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 13 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Nov. 2, 2017 | ACMR | Class A Common Stock | 166,667 | Direct |
| Nov. 2, 2017 | ACMR | Class B Common Stock | 1,146,934 | Direct |
| Nov. 2, 2017 | ACMR | Class A Common Stock | 60,000 | Indirect |
| Nov. 2, 2017 | ACMR | Class B Common Stock | 7,334 | Indirect |
| Nov. 2, 2017 | ACMR | Class A Common Stock | 206,667 | Indirect |
| Nov. 2, 2017 | ACMR | Class B Common Stock | 33,334 | Indirect |
| Nov. 2, 2017 | ACMR | Class B Common Stock | 117,334 | Indirect |
| Nov. 2, 2017 | ACMR | Class B Common Stock | 117,334 | Indirect |
| Nov. 2, 2017 | ACMR | Stock Option→ Class A Common Stock (133,334) | 133,334 | Direct |
| Nov. 2, 2017 | ACMR | Stock Option→ Class A Common Stock (166,667) | 166,667 | Direct |
| Nov. 2, 2017 | ACMR | Stock Option→ Class A Common Stock (400,000) | 400,000 | Direct |
| Nov. 2, 2017 | ACMR | Stock Option→ Class A Common Stock (333,334) | 333,334 | Direct |
| Nov. 2, 2017 | ACMR | Stock Option→ Class A Common Stock (18,334) | 18,334 | Indirect |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
ACMR
CEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $267,801 | $359,920 | — | — | — | — | $5,048 | $632,769 |
| 2024 | $266,940 | $227,448 | — | — | — | — | $4,219 | $498,607 |
| 2023 | $256,212 | $205,755 | — | — | — | — | $4,264 | $23,533,975 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.