Wang David H, an insider at ACM Research, Inc. ($ACMR), sold shares on the open market fifteen times over the past year, totaling about $16 million. His most recent sale occurred on March 12, 2026. These ACMR insider sales rank 796th among 11,678 individuals in our database, surpassing the average of $8.6 million per seller and 6.4 transactions. Wang David H made no open market purchases in the last 365 days.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 11, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 55373 | $47.89 | 1,753,175.0000 | 68,414,313 | 3.06% | 0.08% |
| March 12, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 50000 | $0.00 | 370,002.0000 | 68,414,313 | 11.90% | 0.07% |
| March 11, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 60000 | $0.00 | 420,002.0000 | 68,414,313 | 12.50% | 0.09% |
| March 12, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 702 | $46.57 | 1,748,548.0000 | 68,414,313 | 0.04% | 0.00% |
| March 12, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 38737 | $45.74 | 1,749,250.0000 | 68,414,313 | 2.17% | 0.06% |
| March 12, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 10561 | $44.92 | 1,787,987.0000 | 68,414,313 | 0.59% | 0.02% |
| March 12, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 50000 | $1.00 | 1,798,548.0000 | 68,414,313 | 2.86% | 0.07% |
| March 11, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 4627 | $48.34 | 1,748,548.0000 | 68,414,313 | 0.26% | 0.01% |
| March 11, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 60000 | $1.00 | 1,808,548.0000 | 68,414,313 | 3.43% | 0.09% |
| Feb. 4, 2026 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | A | Stock Option | 545400 | $0.00 | 1,636,197.0000 | 68,414,313 | 50.00% | 0.80% |
| Dec. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 60000 | $1.00 | 1,808,548.0000 | 68,414,313 | 3.43% | 0.09% |
| Dec. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 70000 | $0.00 | 540,002.0000 | 68,414,313 | 11.48% | 0.10% |
| Dec. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 40183 | $34.42 | 1,748,548.0000 | 68,414,313 | 2.25% | 0.06% |
| Dec. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 19817 | $33.52 | 1,788,731.0000 | 68,414,313 | 1.10% | 0.03% |
| Dec. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 70000 | $1.00 | 1,818,548.0000 | 68,414,313 | 4.00% | 0.10% |
| Dec. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 68800 | $33.05 | 1,749,748.0000 | 68,414,313 | 3.78% | 0.10% |
| Dec. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 1200 | $33.56 | 1,748,548.0000 | 68,414,313 | 0.07% | 0.00% |
| Dec. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 60000 | $0.00 | 480,002.0000 | 68,414,313 | 11.11% | 0.09% |
| Oct. 27, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | A | Stock Option | 545400 | $0.00 | 545,400.0000 | 68,414,313 | 9999.99% | 0.80% |
| Sept. 8, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 130000 | $0.00 | 610,002.0000 | 66,237,424 | 17.57% | 0.20% |
| Sept. 8, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 130000 | $1.00 | 1,748,548.0000 | 66,237,424 | 8.03% | 0.20% |
| Sept. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 60000 | $26.44 | 1,618,548.0000 | 66,237,424 | 3.57% | 0.09% |
| Sept. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 66057 | $26.73 | 1,622,491.0000 | 66,237,424 | 3.91% | 0.10% |
| Sept. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 3943 | $27.31 | 1,618,548.0000 | 66,237,424 | 0.24% | 0.01% |
| Sept. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 60000 | $1.00 | 1,678,548.0000 | 66,237,424 | 3.71% | 0.09% |
| Sept. 4, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 60000 | $0.00 | 740,002.0000 | 66,237,424 | 7.50% | 0.09% |
| Sept. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 70000 | $0.00 | 800,002.0000 | 66,237,424 | 8.05% | 0.11% |
| Sept. 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 70000 | $1.00 | 1,688,548.0000 | 66,237,424 | 4.32% | 0.11% |
| May 21, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 69992 | $23.60 | 1,618,556.0000 | 66,237,424 | 4.15% | 0.11% |
| May 22, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 60000 | $0.00 | 870,002.0000 | 66,237,424 | 6.45% | 0.09% |
| May 21, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 70000 | $0.00 | 930,002.0000 | 66,237,424 | 7.00% | 0.11% |
| May 22, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 60000 | $22.63 | 1,618,548.0000 | 66,237,424 | 3.57% | 0.09% |
| May 22, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 60000 | $1.00 | 1,678,548.0000 | 66,237,424 | 3.71% | 0.09% |
| May 21, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 70000 | $1.00 | 1,688,548.0000 | 66,237,424 | 4.32% | 0.11% |
| May 21, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 8 | $24.04 | 1,618,548.0000 | 66,237,424 | 0.00% | 0.00% |
| March 13, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 36481 | $27.29 | 1,619,567.0000 | 66,237,424 | 2.20% | 0.06% |
| March 11, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 56250 | $26.57 | 1,693,548.0000 | 66,237,424 | 3.21% | 0.08% |
| March 12, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 37500 | $27.42 | 1,656,048.0000 | 66,237,424 | 2.21% | 0.06% |
| March 13, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 1019 | $27.65 | 1,618,548.0000 | 66,237,424 | 0.06% | 0.00% |
| March 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 210000 | $0.50 | 1,753,846.0000 | 66,237,424 | 13.60% | 0.32% |
| March 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 210000 | $0.00 | 0.0000 | 66,237,424 | 100.00% | 0.32% |
| March 3, 2025 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 4048 | $25.94 | 1,749,798.0000 | 66,237,424 | 0.23% | 0.01% |
| Nov. 29, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 56250 | $17.44 | 1,543,846.0000 | 66,671,526 | 3.52% | 0.08% |
| Nov. 26, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 46766 | $17.80 | 1,609,580.0000 | 66,671,526 | 2.82% | 0.07% |
| Nov. 26, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 9484 | $18.31 | 1,600,096.0000 | 66,671,526 | 0.59% | 0.01% |
| Nov. 22, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 56250 | $19.08 | 1,656,346.0000 | 66,671,526 | 3.28% | 0.08% |
| Nov. 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 270000 | $0.00 | 210,000.0000 | 66,671,526 | 0.00% | 0.40% |
| Nov. 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 7262 | $18.59 | 1,712,596.0000 | 66,671,526 | 0.42% | 0.01% |
| Nov. 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 270000 | $0.50 | 1,719,858.0000 | 66,671,526 | 18.62% | 0.40% |
| May 29, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $22.62 | 1,490,948.0000 | 64,870,543 | 2.93% | 0.07% |
| May 29, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 41090 | $22.62 | 1,449,858.0000 | 64,870,543 | 2.76% | 0.06% |
| May 22, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $22.81 | 1,535,948.0000 | 64,870,543 | 2.85% | 0.07% |
| May 22, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $22.81 | 1,580,948.0000 | 64,870,543 | 2.77% | 0.07% |
| May 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 3910 | $23.02 | 1,625,948.0000 | 64,870,543 | 0.24% | 0.01% |
| May 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 180000 | $0.50 | 1,629,858.0000 | 64,870,543 | 12.42% | 0.28% |
| May 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 180000 | $0.00 | 480,000.0000 | 64,870,543 | 27.27% | 0.28% |
| March 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 10611 | $28.38 | 1,449,858.0000 | 64,870,543 | 0.73% | 0.02% |
| March 14, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 76478 | $27.51 | 1,460,469.0000 | 64,870,543 | 4.98% | 0.12% |
| March 8, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $30.35 | 1,536,947.0000 | 64,870,543 | 2.84% | 0.07% |
| March 8, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $30.36 | 1,581,947.0000 | 64,870,543 | 2.77% | 0.07% |
| March 1, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 180000 | $0.00 | 660,000.0000 | 64,870,543 | 21.43% | 0.28% |
| March 1, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 2911 | $30.92 | 1,626,947.0000 | 64,870,543 | 0.18% | 0.00% |
| March 1, 2024 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 180000 | $0.50 | 1,629,858.0000 | 64,870,543 | 12.42% | 0.28% |
| Nov. 29, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $17.14 | 1,489,634.0000 | 65,341,771 | 2.93% | 0.07% |
| Nov. 29, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 39776 | $17.13 | 1,449,858.0000 | 65,341,771 | 2.67% | 0.06% |
| Nov. 22, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $17.68 | 1,534,634.0000 | 65,341,771 | 2.85% | 0.07% |
| Nov. 22, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 45000 | $17.67 | 1,579,634.0000 | 65,341,771 | 2.77% | 0.07% |
| Nov. 14, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 180000 | $0.00 | 840,000.0000 | 65,341,771 | 17.65% | 0.28% |
| Nov. 14, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 5224 | $17.23 | 1,624,634.0000 | 65,341,771 | 0.32% | 0.01% |
| Nov. 14, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 180000 | $0.50 | 1,629,858.0000 | 65,341,771 | 12.42% | 0.28% |
| Sept. 13, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 85116 | $17.68 | 1,449,858.0000 | 65,341,771 | 5.55% | 0.13% |
| Sept. 12, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 86427 | $18.03 | 1,538,547.0000 | 65,341,771 | 5.32% | 0.13% |
| Sept. 12, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | S | Class A Common Stock | 3573 | $18.72 | 1,534,974.0000 | 65,341,771 | 0.23% | 0.01% |
| Sept. 4, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | F | Class A Common Stock | 4884 | $18.43 | 1,624,974.0000 | 65,341,771 | 0.30% | 0.01% |
| Sept. 4, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Stock Option | 180000 | $0.00 | 1,020,000.0000 | 65,341,771 | 15.00% | 0.28% |
| Sept. 4, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See Remarks | M | Class A Common Stock | 180000 | $0.50 | 1,629,858.0000 | 65,341,771 | 12.42% | 0.28% |
| Aug. 10, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See remarks | A | Stock Option | 1080000 | $0.00 | 1,080,000.0000 | 65,341,771 | 50.00% | 1.65% |
| Aug. 10, 2023 | ACM Research, Inc. | $ACMR | Wang David H | See remarks | A | Stock Option | 1080000 | $0.00 | 1,080,000.0000 | 65,341,771 | 50.00% | 1.65% |