SEC CIK 1047579
PRINS RICHARD K
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| AMPHview stock → | 29,625 | 2026-08-11 |
Position History — AMPH
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — AMPH
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-08-11 | Open-market sale | 7,973 | $20.30 | 29,625 |
| 2026-06-01 | Grant / award (derivative) | 17,365 | $0.00 | 17,365 |
| 2026-06-01 | Grant / award | 8,143 | $0.00 | 37,598 |
| 2025-11-25 | Option exercise (derivative) | 4,179 | $0.00 | 0 |
| 2025-11-25 | Open-market sale | 4,179 | $27.10 | 35,183 |
| 2025-11-25 | Option exercise | 4,179 | $16.69 | 39,362 |
| 2025-06-02 | Grant / award (derivative) | 11,402 | $0.00 | 11,402 |
| 2025-06-02 | Grant / award | 5,122 | $0.00 | 35,183 |
| 2024-12-09 | Option exercise (derivative) | 10,000 | $0.00 | 0 |
| 2024-12-09 | Open-market sale | 10,000 | $43.77 | 30,471 |
| 2024-12-09 | Gift | 410 | $0.00 | 30,061 |
| 2024-12-09 | Option exercise | 10,000 | $19.52 | 40,471 |
| 2024-11-12 | Option exercise (derivative) | 2,500 | $0.00 | 4,179 |
| 2024-11-12 | Option exercise | 2,500 | $16.69 | 36,471 |
| 2024-11-12 | Gift | 1,000 | $0.00 | 30,471 |
| 2024-11-12 | Open-market sale | 5,000 | $48.80 | 31,471 |
| 2024-08-19 | Gift | 1,500 | $0.00 | 29,455 |
| 2024-08-12 | Option exercise (derivative) | 7,182 | $0.00 | 10,000 |
| 2024-08-12 | Option exercise | 6,004 | $20.08 | 43,890 |
| 2024-08-12 | Option exercise | 7,182 | $19.52 | 51,072 |
| 2024-08-12 | Open-market sale | 17,101 | $43.07 | 33,971 |
| 2024-08-12 | Option exercise | 3,915 | $20.03 | 37,886 |
| 2024-06-03 | Grant / award (derivative) | 6,864 | $0.00 | 6,864 |
| 2024-06-03 | Grant / award | 3,076 | $0.00 | 33,971 |
| 2023-11-17 | Gift | 1,000 | $0.00 | 30,895 |
| 2023-11-17 | Open-market sale | 4,000 | $55.86 | 31,895 |
| 2023-11-13 | Open-market sale | 5,000 | $52.50 | 35,895 |
| 2023-08-18 | Open-market sale | 2,000 | $52.50 | 40,895 |
| 2023-08-15 | Open-market sale | 4,163 | $57.39 | 42,895 |
| 2023-06-05 | Grant / award (derivative) | 7,016 | $0.00 | 7,016 |
| 2023-06-05 | Grant / award | 2,716 | $0.00 | 47,058 |
| 2023-05-15 | Option exercise (derivative) | 5,000 | $0.00 | 6,679 |
| 2023-05-15 | Option exercise | 5,000 | $16.69 | 49,342 |
| 2023-05-15 | Open-market sale | 5,000 | $43.50 | 44,342 |
| 2023-05-12 | Option exercise (derivative) | 5,000 | $0.00 | 11.68 |
| 2023-05-12 | Gift | 3,000 | $0.00 | 44,342 |
| 2023-05-12 | Open-market sale | 5,000 | $42.06 | 47,342 |
| 2023-05-12 | Option exercise | 5,000 | $16.69 | 52,342 |
| 2022-06-10 | Grant / award (derivative) | 10,984 | $0.00 | 10,984 |
| 2022-06-10 | Grant / award | 4,163 | $0.00 | 47,342 |
| 2022-05-17 | Gift | 2,000 | $0.00 | 43,179 |
| 2022-03-15 | Option exercise (derivative) | 10,000 | $0.00 | 0 |
| 2022-03-15 | Open-market sale | 10,000 | $34.02 | 45,179 |
| 2022-03-15 | Option exercise | 10,000 | $17.11 | 55,179 |
| 2021-12-10 | Option exercise (derivative) | 5,291 | $0.00 | 10,000 |
| 2021-12-10 | Open-market sale | 5,291 | $21.36 | 45,179 |
| 2021-12-10 | Option exercise | 5,291 | $17.11 | 50,470 |
| 2021-11-22 | Option exercise (derivative) | 5,000 | $0.00 | 15,291 |
| 2021-11-22 | Option exercise | 5,000 | $17.11 | 50,179 |
| 2021-11-22 | Open-market sale | 5,000 | $21.22 | 45,179 |
| 2021-06-07 | Option exercise (derivative) | 5,000 | $0.00 | 0 |
| 2021-06-07 | Grant / award (derivative) | 17,182 | $0.00 | 17,182 |
| 2021-06-07 | Open-market sale | 5,000 | $18.70 | 39,160 |
| 2021-06-07 | Option exercise | 5,000 | $16.43 | 44,160 |
| 2021-06-07 | Grant / award | 6,019 | $0.00 | 45,179 |
| 2021-06-04 | Option exercise (derivative) | 5,000 | $0.00 | 5,000 |
| 2021-06-04 | Option exercise | 5,000 | $16.43 | 44,160 |
| 2021-06-04 | Open-market sale | 5,000 | $18.77 | 39,160 |
| 2021-05-11 | Option exercise (derivative) | 15,827 | $0.00 | 10,000 |
| 2021-05-11 | Option exercise | 15,827 | $16.43 | 54,987 |
| 2021-05-11 | Open-market sale | 15,827 | $18.90 | 39,160 |
| 2020-08-11 | Open-market sale | 6,000 | $20.33 | 39,160 |
| 2020-06-08 | Grant / award (derivative) | 16,004 | $0.00 | 16,004 |
| 2020-06-08 | Grant / award | 5,851 | $0.00 | 45,160 |
| 2020-05-12 | Option exercise (derivative) | 30,282 | $0.00 | 0 |
| 2020-05-12 | Option exercise | 30,282 | $15.11 | 69,591 |
| 2020-05-12 | Open-market sale | 30,282 | $19.00 | 39,309 |
| 2019-08-26 | Option exercise (derivative) | 3,618 | $0.00 | 30,282 |
| 2019-08-26 | Open-market sale | 3,618 | $22.60 | 39,309 |
| 2019-08-26 | Option exercise | 3,618 | $15.11 | 42,927 |
| 2019-08-23 | Option exercise (derivative) | 3,882 | $0.00 | 33,900 |
| 2019-08-23 | Option exercise | 3,882 | $15.11 | 43,191 |
| 2019-08-23 | Open-market sale | 3,882 | $22.58 | 39,309 |
| 2019-08-13 | Option exercise (derivative) | 10,000 | $0.00 | 37,782 |
| 2019-08-13 | Option exercise | 10,000 | $15.11 | 49,309 |
| 2019-08-13 | Open-market sale | 10,000 | $20.78 | 39,309 |
| 2019-06-12 | Grant / award (derivative) | 13,915 | $0.00 | 13,915 |
| 2019-06-12 | Grant / award | 5,491 | $0.00 | 39,309 |
| 2018-12-14 | Open-market sale | 1,616 | $20.65 | 33,818 |
| 2018-11-29 | Option exercise (derivative) | 5,000 | $0.00 | 0 |
| 2018-11-29 | Open-market sale | 5,000 | $20.50 | 35,434 |
| 2018-11-29 | Option exercise | 5,000 | $14.66 | 40,434 |
| 2018-11-14 | Option exercise (derivative) | 5,000 | $0.00 | 5,000 |
| 2018-11-14 | Open-market sale | 5,000 | $20.23 | 35,434 |
| 2018-11-14 | Option exercise | 5,000 | $14.66 | 40,434 |
| 2018-08-14 | Option exercise (derivative) | 10,000 | $0.00 | 10,000 |
| 2018-08-14 | Open-market sale | 10,000 | $17.82 | 35,434 |
| 2018-08-14 | Option exercise | 10,000 | $14.66 | 45,434 |
| 2018-06-07 | Grant / award (derivative) | 16,679 | $0.00 | 16,679 |
| 2018-06-07 | Grant / award | 6,590 | $0.00 | 35,434 |
| 2018-03-15 | Option exercise (derivative) | 16,598 | $0.00 | 20,000 |
| 2018-03-15 | Option exercise | 16,598 | $14.66 | 45,442 |
| 2018-03-15 | Open-market sale | 16,598 | $19.90 | 28,844 |
| 2017-08-15 | Option exercise (derivative) | 5,000 | $0.00 | 0 |
| 2017-08-15 | Option exercise | 5,000 | $10.77 | 33,844 |
| 2017-08-15 | Open-market sale | 5,000 | $14.82 | 28,844 |
| 2017-08-14 | Option exercise (derivative) | 5,000 | $0.00 | 5,000 |
| 2017-08-14 | Open-market sale | 5,000 | $14.80 | 28,844 |
| 2017-08-14 | Option exercise | 5,000 | $10.77 | 33,844 |
| 2017-06-09 | Option exercise (derivative) | 10,000 | $0.00 | 10,000 |
| 2017-06-09 | Option exercise | 10,000 | $10.77 | 38,844 |
| 2017-06-09 | Open-market sale | 10,000 | $17.07 | 28,844 |
| 2017-06-08 | Grant / award (derivative) | 20,291 | $0.00 | 20,291 |
| 2017-06-08 | Grant / award | 5,844 | $0.00 | 28,844 |
| 2017-05-11 | Option exercise (derivative) | 7,500 | $0.00 | 20,000 |
| 2017-05-11 | Option exercise | 7,500 | $10.77 | 30,500 |
| 2017-05-11 | Open-market sale | 7,500 | $15.43 | 23,000 |
| 2016-11-11 | Option exercise (derivative) | 5,000 | $0.00 | 27,500 |
| 2016-11-11 | Open-market sale | 8,000 | $20.06 | 23,000 |
| 2016-11-11 | Option exercise | 5,000 | $10.77 | 31,000 |
| 2016-08-18 | Open-market sale | 3,086 | $19.62 | 26,000 |
| 2016-08-11 | Option exercise (derivative) | 3,898 | $0.00 | 0 |
| 2016-08-11 | Option exercise (derivative) | 7,500 | $0.00 | 32,500 |
| 2016-08-11 | Option exercise | 2,595 | $15.23 | 31,681 |
| 2016-08-11 | Open-market sale | 13,993 | $18.03 | 29,086 |
| 2016-08-11 | Option exercise | 7,500 | $10.77 | 43,079 |
| 2016-08-11 | Option exercise | 3,898 | $14.23 | 35,579 |
| 2016-06-13 | Option exercise (derivative) | 7,500 | $0.00 | 3,898 |
| 2016-06-13 | Option exercise | 7,500 | $14.23 | 36,586 |
| 2016-06-13 | Open-market sale | 7,500 | $15.94 | 29,086 |
| 2016-06-09 | Grant / award (derivative) | 25,827 | $0.00 | 25,827 |
| 2016-06-09 | Grant / award | 6,086 | $0.00 | 29,086 |
| 2016-05-17 | Open-market sale | 3,200 | $13.56 | 23,000 |
| 2016-03-17 | Open-market sale | 2,400 | $11.25 | 26,200 |
| 2015-12-15 | Gift | 350 | $0.00 | 28,600 |
| 2015-11-17 | Open-market sale | 3,772 | $13.95 | 28,950 |
| 2015-08-24 | Gift | 3,000 | $0.00 | 32,722 |
| 2015-08-18 | Option exercise (derivative) | 2,100 | $0.00 | 40,000 |
| 2015-08-18 | Option exercise | 2,100 | $10.77 | 44,822 |
| 2015-08-18 | Open-market sale | 9,100 | $14.66 | 35,722 |
| 2015-08-17 | Option exercise (derivative) | 5,400 | $0.00 | 42,100 |
| 2015-08-17 | Open-market sale | 5,400 | $14.70 | 42,722 |
| 2015-08-17 | Option exercise | 5,400 | $10.77 | 48,122 |
| 2015-05-27 | Grant / award (derivative) | 47,782 | $0.00 | 47,782 |
| 2015-05-27 | Grant / award | 8,686 | $0.00 | 42,722 |
| 2015-05-22 | Option exercise (derivative) | 1,942 | $0.00 | 47,500 |
| 2015-05-22 | Open-market sale | 1,942 | $14.76 | 36,051 |
| 2015-05-22 | Option exercise | 1,942 | $10.77 | 37,993 |
| 2015-05-21 | Option exercise (derivative) | 1,664 | $0.00 | 49,442 |
| 2015-05-21 | Option exercise (derivative) | 11,901 | $0.00 | 0 |
| 2015-05-21 | Option exercise | 1,664 | $10.77 | 49,616 |
| 2015-05-21 | Option exercise | 11,901 | $11.68 | 47,952 |
| 2015-05-21 | Open-market sale | 13,565 | $14.76 | 36,051 |
| 2015-05-20 | Option exercise (derivative) | 13,945 | $0.00 | 11,901 |
| 2015-05-20 | Open-market sale | 13,945 | $14.79 | 36,051 |
| 2015-05-20 | Option exercise | 13,945 | $11.68 | 49,996 |
| 2015-05-19 | Option exercise (derivative) | 3,000 | $0.00 | 25,846 |
| 2015-05-19 | Option exercise | 3,000 | $11.68 | 39,051 |
| 2015-05-19 | Open-market sale | 3,000 | $14.94 | 36,051 |
| 2015-01-27 | Gift | 2,015 | $0.00 | 34,036 |
| 2014-08-18 | Open-market buy | 2,600 | $10.03 | 36,051 |
| 2014-08-15 | Open-market buy | 1,400 | $10.00 | 33,451 |
| 2014-06-24 | — | — | — | 4,093 |
| 2014-06-24 | — | — | — | 27,958 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.