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Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (26 ops.)
Latest filing published 20 Aug 2026 for ACM Research, Inc., €24k. Read the official filing
Filing timeline
BuySaleHaiping Dun
Insider track record
Disclosed buys
0
Disclosed sells
26
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Haiping Dun: trading record in brief
Haiping Dun is a declared insider of ACM Research, Inc. (senior executive), with filings sourced from SEC (Form 4). Between 2 March 2022 and 18 August 2026, the trades on record add up to 48 filings.
Sales make up the whole of the open-market record (26 sales, €7.1M). The rest of the record consists of 2 share grants and 18 option exercises. Since January 2026: no purchases and 7 sales on the market.
Most recently, on 20 August 2026, the filings show an option exercise worth €24k in ACM Research, Inc. Typically, a trade is published a median of 2 days after it takes place. The legal deadline for a Form 4 is two business days after the transaction. Sales are harder to read than purchases, since they often meet personal needs such as tax or diversification. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.
Companies and markets linked to Haiping Dun
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations48 total
5,000 shares@ US$5.60Class A Common StockSEC:0001140361-26-033892:0
1,200 shares@ US$80.29Class A Common StockSEC:0001140361-26-033892:1
3,400 shares@ US$81.31Class A Common StockSEC:0001140361-26-033892:2
400 shares@ US$82.17Class A Common StockSEC:0001140361-26-033892:3
5,000 shares@ US$5.600.0004% mcap0.3% of flowClass A Common StockSEC:0001140361-26-022458:0
1,333 shares@ US$63.840.0011% mcap1.0% of flowClass A Common StockSEC:0001140361-26-022458:1
500 shares@ US$65.090.0004% mcap0.4% of flowClass A Common StockSEC:0001140361-26-022458:2
1,309 shares@ US$67.210.0012% mcap1.1% of flowClass A Common StockSEC:0001140361-26-022458:3
1,858 shares@ US$67.540.0017% mcap1.5% of flowClass A Common StockSEC:0001140361-26-022458:4
5,000 shares@ US$5.600.0006% mcap4.0% of flowClass A Common StockSEC:0001140361-26-009039:0
755,090 shares0Class A Common StockSEC:0001140361-25-042348:0
7,062 shares@ US$29.232.7% of flowClass A Common StockSEC:0001140361-25-009327:1
2,456 shares@ US$28.320.9% of flowClass A Common StockSEC:0001140361-25-009327:0
15,001 shares@ US$26.545.2% of flowClass A Common StockSEC:0001140361-25-008444:0
25,001 shares@ US$0.500.2% of flowClass A Common StockSEC:0001140361-25-007211:0
19,058 shares@ US$17.434.4% of flowClass A Common StockSEC:0001140361-24-048310:0
15,000 shares@ US$19.123.9% of flowClass A Common StockSEC:0001140361-24-047888:0
35,000 shares@ US$0.500.2% of flowClass A Common StockSEC:0001140361-24-047169:0
19,097 shares@ US$18.084.4% of flowClass A Common StockSEC:0001140361-24-039942:0
15,000 shares@ US$19.853.8% of flowClass A Common StockSEC:0001140361-24-038571:0
35,000 shares@ US$0.500.2% of flowClass A Common StockSEC:0001140361-24-037711:0
100,000 shares0Class A Common StockSEC:0001140361-24-031967:0
19,239 shares@ US$22.635.7% of flowClass A Common StockSEC:0001140361-24-028379:0
15,000 shares@ US$22.884.5% of flowClass A Common StockSEC:0001140361-24-027457:0
35,000 shares@ US$0.500.2% of flowClass A Common StockSEC:0001140361-24-026364:0
25 of 48 declarations
