SEC CIK 1645326
Zhou Rong
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| AMPHview stock → | 169,203 | 2026-09-16 |
Position History — AMPH
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — AMPH
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-09-16 | Option exercise (derivative) | 10,000 | $0.00 | 19,424 |
| 2026-09-16 | Open-market sale | 10,000 | $23.94 | 169,203 |
| 2026-09-16 | Option exercise | 10,000 | $13.35 | 179,203 |
| 2026-09-02 | Open-market sale | 3,187 | $23.63 | 169,203 |
| 2026-03-15 | Tax withholding | 1,225 | $18.18 | 171,554 |
| 2026-03-10 | Tax withholding | 2,215 | $18.91 | 172,779 |
| 2026-03-09 | Grant / award (derivative) | 81,341 | $0.00 | 81,341 |
| 2026-03-09 | Grant / award | 39,432 | $0.00 | 174,994 |
| 2026-03-06 | Tax withholding | 1,357 | $19.34 | 135,562 |
| 2026-03-04 | Tax withholding | 1,124 | $19.96 | 136,919 |
| 2025-12-17 | Option exercise (derivative) | 9,787 | $0.00 | 0 |
| 2025-12-17 | Open-market sale | 9,787 | $26.20 | 138,043 |
| 2025-12-17 | Option exercise | 9,787 | $11.33 | 147,830 |
| 2025-03-17 | Tax withholding | 1,967 | $27.69 | 137,497 |
| 2025-03-15 | Tax withholding | 1,222 | $26.66 | 139,464 |
| 2025-03-10 | Grant / award (derivative) | 52,437 | $0.00 | 52,437 |
| 2025-03-10 | Grant / award | 24,692 | $0.00 | 140,686 |
| 2025-03-06 | Tax withholding | 1,354 | $28.32 | 115,994 |
| 2025-03-04 | Tax withholding | 1,121 | $27.62 | 117,348 |
| 2024-12-13 | Option exercise (derivative) | 8,000 | $0.00 | 9,787 |
| 2024-12-13 | Open-market sale | 8,000 | $45.23 | 118,469 |
| 2024-12-13 | Option exercise | 8,000 | $11.33 | 126,469 |
| 2024-12-12 | Option exercise (derivative) | 7,000 | $0.00 | 17,787 |
| 2024-12-12 | Open-market sale | 7,000 | $44.43 | 118,469 |
| 2024-12-12 | Option exercise | 7,000 | $11.33 | 125,469 |
| 2024-11-12 | Option exercise (derivative) | 6,893 | $0.00 | 0 |
| 2024-11-12 | Option exercise | 6,893 | $14.95 | 125,281 |
| 2024-11-12 | Open-market sale | 6,893 | $48.88 | 118,388 |
| 2024-09-13 | Option exercise (derivative) | 3,000 | $0.00 | 6,893 |
| 2024-09-13 | Open-market sale | 3,000 | $48.26 | 118,388 |
| 2024-09-13 | Option exercise | 3,000 | $14.95 | 121,388 |
| 2024-08-26 | Option exercise (derivative) | 4,000 | $0.00 | 9,893 |
| 2024-08-26 | Open-market sale | 4,000 | $48.35 | 118,388 |
| 2024-08-26 | Option exercise | 4,000 | $14.95 | 122,388 |
| 2024-03-17 | Tax withholding | 1,961 | $43.05 | 118,016 |
| 2024-03-16 | Tax withholding | 2,355 | $43.05 | 119,977 |
| 2024-03-15 | Tax withholding | 1,219 | $43.05 | 122,332 |
| 2024-03-06 | Tax withholding | 1,390 | $46.31 | 123,551 |
| 2024-03-04 | Grant / award (derivative) | 26,378 | $0.00 | 26,378 |
| 2024-03-04 | Grant / award | 12,521 | $0.00 | 124,941 |
| 2023-12-04 | Option exercise (derivative) | 3,514 | $0.00 | 0 |
| 2023-12-04 | Option exercise | 3,514 | $16.19 | 115,934 |
| 2023-12-04 | Open-market sale | 3,514 | $59.58 | 112,420 |
| 2023-12-01 | Option exercise (derivative) | 4,316 | $0.00 | 0 |
| 2023-12-01 | Open-market sale | 4,316 | $58.58 | 112,420 |
| 2023-12-01 | Option exercise | 4,316 | $14.40 | 116,736 |
| 2023-06-20 | Option exercise (derivative) | 9,651 | $0.00 | 24,787 |
| 2023-06-20 | Option exercise | 9,651 | $11.33 | 112,341 |
| 2023-06-15 | Option exercise (derivative) | 1,171 | $0.00 | 3,514 |
| 2023-06-15 | Option exercise (derivative) | 4,631 | $0.00 | 13,893 |
| 2023-06-15 | Option exercise (derivative) | 13,575 | $0.00 | 4,316 |
| 2023-06-15 | Option exercise | 4,631 | $14.95 | 101,519 |
| 2023-06-15 | Open-market sale | 5,000 | $51.79 | 96,888 |
| 2023-06-15 | Option exercise | 13,575 | $14.40 | 101,888 |
| 2023-06-15 | Option exercise | 1,171 | $16.19 | 102,690 |
| 2023-06-13 | Option exercise (derivative) | 5,000 | $0.00 | 17,891 |
| 2023-06-13 | Option exercise | 5,000 | $14.40 | 93,313 |
| 2023-06-13 | Open-market sale | 5,000 | $48.24 | 88,313 |
| 2023-05-18 | Option exercise (derivative) | 10,000 | $0.00 | 22,891 |
| 2023-05-18 | Open-market sale | 10,000 | $44.21 | 87,598 |
| 2023-05-18 | Option exercise | 10,000 | $14.40 | 97,598 |
| 2023-03-17 | Tax withholding | 1,901 | $36.29 | 87,598 |
| 2023-03-16 | Tax withholding | 2,283 | $37.60 | 89,499 |
| 2023-03-15 | Tax withholding | 2,057 | $36.84 | 91,782 |
| 2023-03-06 | Grant / award (derivative) | 31,882 | $0.00 | 31,882 |
| 2023-03-06 | Grant / award | 15,129 | $0.00 | 93,839 |
| 2022-03-17 | Tax withholding | 2,447 | $34.18 | 77,583 |
| 2022-03-16 | Tax withholding | 2,283 | $34.22 | 80,030 |
| 2022-03-15 | Grant / award (derivative) | 31,516 | $0.00 | 31,516 |
| 2022-03-15 | Grant / award | 13,658 | $0.00 | 83,965 |
| 2022-03-15 | Tax withholding | 1,652 | $34.74 | 82,313 |
| 2022-02-25 | Option exercise (derivative) | 7,000 | $0.00 | 0 |
| 2022-02-25 | Open-market sale | 13,246 | $28.77 | 70,307 |
| 2022-02-25 | Option exercise | 7,000 | $10.93 | 83,553 |
| 2022-02-08 | Option exercise (derivative) | 7,000 | $0.00 | 7,000 |
| 2022-02-08 | Open-market sale | 7,000 | $26.77 | 76,553 |
| 2022-02-08 | Option exercise | 7,000 | $10.93 | 83,553 |
| 2022-01-10 | Option exercise (derivative) | 14,000 | $0.00 | 14,000 |
| 2022-01-10 | Open-market sale | 10,251 | $25.77 | 76,553 |
| 2022-01-10 | Open-market sale | 10,677 | $24.96 | 86,804 |
| 2022-01-10 | Option exercise | 14,000 | $10.93 | 97,481 |
| 2021-11-11 | Option exercise (derivative) | 7,813 | $0.00 | 0 |
| 2021-11-11 | Open-market sale | 7,813 | $21.67 | 83,121 |
| 2021-11-11 | Option exercise | 7,813 | $10.48 | 90,934 |
| 2021-08-02 | Option exercise (derivative) | 6,000 | $0.00 | 7,813 |
| 2021-08-02 | Open-market sale | 9,123 | $21.24 | 83,121 |
| 2021-08-02 | Option exercise | 6,000 | $10.48 | 92,244 |
| 2021-07-26 | Option exercise (derivative) | 6,000 | $0.00 | 13,813 |
| 2021-07-26 | Option exercise | 6,000 | $10.48 | 92,244 |
| 2021-07-26 | Open-market sale | 6,000 | $20.87 | 86,244 |
| 2021-07-20 | Option exercise (derivative) | 5,187 | $0.00 | 19,813 |
| 2021-07-20 | Open-market sale | 5,187 | $20.57 | 86,244 |
| 2021-07-20 | Option exercise | 5,187 | $10.48 | 91,431 |
| 2021-06-09 | Open-market sale | 4,732 | $19.58 | 86,244 |
| 2021-06-08 | Option exercise (derivative) | 8,180 | $0.00 | 0 |
| 2021-06-08 | Option exercise | 8,180 | $14.23 | 99,156 |
| 2021-06-08 | Open-market sale | 8,180 | $19.34 | 90,976 |
| 2021-05-14 | Option exercise (derivative) | 11,120 | $0.00 | 8,180 |
| 2021-05-14 | Option exercise | 11,120 | $14.23 | 107,385 |
| 2021-05-14 | Open-market sale | 17,419 | $19.72 | 89,966 |
| 2021-05-13 | Option exercise (derivative) | 700 | $0.00 | 19,300 |
| 2021-05-13 | Option exercise | 700 | $14.23 | 96,965 |
| 2021-05-13 | Open-market sale | 700 | $19.58 | 96,265 |
| 2021-03-17 | Grant / award (derivative) | 51,621 | $0.00 | 51,621 |
| 2021-03-17 | Grant / award | 21,984 | $0.00 | 96,265 |
| 2021-03-16 | Tax withholding | 3,303 | $18.44 | 74,281 |
| 2021-03-15 | Tax withholding | 1,652 | $19.15 | 77,584 |
| 2020-06-04 | Option exercise (derivative) | 8,918 | $0.00 | 0 |
| 2020-06-04 | Option exercise | 8,918 | $11.41 | 89,042 |
| 2020-06-04 | Open-market sale | 9,806 | $19.19 | 79,236 |
| 2020-06-03 | Option exercise (derivative) | 11,082 | $0.00 | 8,918 |
| 2020-06-03 | Open-market sale | 13,163 | $18.82 | 80,124 |
| 2020-06-03 | Option exercise | 11,082 | $11.41 | 93,287 |
| 2020-03-17 | Tax withholding | 992 | $14.50 | 80,891 |
| 2020-03-16 | Grant / award (derivative) | 61,822 | $0.00 | 61,822 |
| 2020-03-16 | Grant / award | 26,400 | $0.00 | 81,883 |
| 2020-03-16 | Tax withholding | 1,020 | $13.03 | 55,483 |
| 2020-03-15 | Tax withholding | 1,653 | $14.19 | 56,503 |
| 2019-06-14 | Tax withholding | 204 | $19.82 | 58,156 |
| 2019-05-06 | Option exercise (derivative) | 9,600 | $0.00 | 0 |
| 2019-05-06 | Option exercise | 9,600 | $20.26 | 66,707 |
| 2019-05-06 | Open-market sale | 9,600 | $22.76 | 57,107 |
| 2019-03-26 | Tax withholding | 814 | $20.54 | 57,107 |
| 2019-03-17 | Tax withholding | 1,510 | $20.23 | 57,921 |
| 2019-03-16 | Tax withholding | 1,553 | $20.23 | 59,431 |
| 2019-03-15 | Grant / award (derivative) | 22,541 | $0.00 | 22,541 |
| 2019-03-15 | Tax withholding | 1,179 | $20.23 | 60,984 |
| 2019-03-15 | Grant / award | 10,133 | $0.00 | 62,163 |
| 2019-03-01 | Option exercise (derivative) | 3,200 | $0.00 | 6,400 |
| 2019-03-01 | Open-market sale | 3,200 | $25.00 | 52,030 |
| 2019-03-01 | Option exercise | 3,200 | $20.26 | 55,230 |
| 2019-02-05 | Option exercise (derivative) | 3,200 | $0.00 | 9,600 |
| 2019-02-05 | Option exercise (derivative) | 3,200 | $0.00 | 12,800 |
| 2019-02-05 | Option exercise | 3,200 | $20.26 | 56,319 |
| 2019-02-05 | Open-market sale | 4,289 | $23.00 | 52,030 |
| 2018-12-03 | Open-market sale | 1,089 | $22.00 | 53,119 |
| 2018-11-09 | Open-market sale | 1,089 | $21.00 | 53,303 |
| 2018-11-08 | Open-market sale | 1,084 | $20.00 | 54,392 |
| 2018-06-15 | Tax withholding | 134 | $16.88 | 55,476 |
| 2018-03-26 | Tax withholding | 535 | $18.61 | 54,434 |
| 2018-03-17 | Tax withholding | 969 | $19.91 | 54,969 |
| 2018-03-16 | Tax withholding | 1,128 | $19.91 | 55,938 |
| 2018-03-15 | Grant / award (derivative) | 20,827 | $0.00 | 20,827 |
| 2018-03-15 | Grant / award | 8,969 | $0.00 | 57,066 |
| 2017-06-15 | Tax withholding | 146 | $16.18 | 48,096 |
| 2017-03-26 | Tax withholding | 568 | $13.76 | 46,972 |
| 2017-03-17 | Tax withholding | 1,248 | $13.75 | 47,540 |
| 2017-03-16 | Grant / award (derivative) | 29,424 | $0.00 | 29,424 |
| 2017-03-16 | Grant / award | 11,797 | $0.00 | 48,788 |
| 2016-12-05 | Open-market sale | 61 | $20.70 | 36,991 |
| 2016-06-15 | Open-market sale | 1,551 | $15.85 | 37,137 |
| 2016-06-15 | Tax withholding | 146 | $15.76 | 36,991 |
| 2016-03-26 | Tax withholding | 568 | $11.96 | 37,137 |
| 2016-03-17 | Grant / award (derivative) | 34,438 | $0.00 | 34,438 |
| 2016-03-17 | Grant / award | 11,473 | $0.00 | 37,705 |
| 2015-12-16 | Open-market sale | 772 | $14.29 | 25,460 |
| 2015-06-17 | Open-market sale | 1,000 | $16.48 | 26,232 |
| 2015-06-15 | Grant / award (derivative) | 4,685 | $0.00 | 4,685 |
| 2015-06-15 | Grant / award | 1,544 | $0.00 | 27,232 |
| 2015-06-09 | — | — | — | 5,000 |
| 2015-06-09 | — | — | — | 99,668 |
| 2015-06-09 | — | — | — | 25,688 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.