SEC CIK 1559422
Walker Karin L
Reported ownership across 2 companies, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| BGMSview stock → | 40,602 | 2023-06-30 |
| PRTAview stock → | 10,000 | 2026-07-28 |
Position History — PRTA
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — PRTA
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-07-28 | Option exercise (derivative) | 15,000 | $0.00 | 0 |
| 2026-07-28 | Disposition to issuer | 15,000 | $8.56 | 10,000 |
| 2026-07-28 | Option exercise | 15,000 | — | 25,000 |
| 2026-03-03 | Grant / award (derivative) | 150,000 | $0.00 | 150,000 |
| 2025-07-28 | Grant / award | 25,000 | $0.00 | 25,000 |
| 2025-03-05 | Grant / award (derivative) | 70,000 | $0.00 | 70,000 |
| 2024-02-27 | Grant / award (derivative) | 54,000 | $0.00 | 54,000 |
| 2024-01-24 | Option exercise (derivative) | 5,000 | $0.00 | 15,000 |
| 2024-01-24 | Option exercise | 5,000 | $13.53 | 5,000 |
| 2024-01-24 | Open-market sale | 5,000 | $34.00 | 0 |
| 2023-12-20 | Option exercise (derivative) | 5,000 | $0.00 | 20,000 |
| 2023-12-20 | Open-market sale | 3,322 | $37.45 | 0 |
| 2023-12-20 | Option exercise | 5,000 | $13.53 | 5,000 |
| 2023-12-20 | Open-market sale | 1,678 | $36.68 | 3,322 |
| 2023-11-30 | Option exercise (derivative) | 5,000 | $0.00 | 25,000 |
| 2023-11-30 | Option exercise | 5,000 | $13.53 | 5,000 |
| 2023-11-30 | Open-market sale | 5,000 | $34.00 | 0 |
| 2023-10-25 | Option exercise (derivative) | 5,000 | $0.00 | 30,000 |
| 2023-10-25 | Option exercise | 5,000 | $13.53 | 5,000 |
| 2023-10-25 | Open-market sale | 2,917 | $41.38 | 294 |
| 2023-10-25 | Open-market sale | 294 | $42.28 | 0 |
| 2023-10-25 | Open-market sale | 1,789 | $40.27 | 3,211 |
| 2023-09-19 | Option exercise (derivative) | 5,000 | $0.00 | 481 |
| 2023-09-19 | Open-market sale | 5,000 | $52.36 | 0 |
| 2023-09-19 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-08-18 | Option exercise (derivative) | 5,000 | $0.00 | 5,481 |
| 2023-08-18 | Open-market sale | 5,000 | $57.18 | 0 |
| 2023-08-18 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-07-19 | Option exercise (derivative) | 5,000 | $0.00 | 10,481 |
| 2023-07-19 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-07-19 | Open-market sale | 3,966 | $68.96 | 1,034 |
| 2023-07-19 | Open-market sale | 1,034 | $70.08 | 0 |
| 2023-06-20 | Option exercise (derivative) | 5,000 | $0.00 | 15,481 |
| 2023-06-20 | Open-market sale | 2,000 | $67.88 | 3,000 |
| 2023-06-20 | Open-market sale | 2,471 | $69.49 | 529 |
| 2023-06-20 | Open-market sale | 529 | $69.99 | 0 |
| 2023-06-20 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-05-19 | Option exercise (derivative) | 5,000 | $0.00 | 20,481 |
| 2023-05-19 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-05-19 | Open-market sale | 2,177 | $74.47 | 0 |
| 2023-05-19 | Open-market sale | 2,823 | $73.63 | 2,177 |
| 2023-04-19 | Option exercise (derivative) | 5,000 | $0.00 | 25,481 |
| 2023-04-19 | Open-market sale | 2,917 | $52.64 | 2,083 |
| 2023-04-19 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-04-19 | Open-market sale | 2,083 | $53.25 | 0 |
| 2023-03-20 | Option exercise (derivative) | 5,000 | $0.00 | 30,481 |
| 2023-03-20 | Open-market sale | 1,097 | $48.47 | 0 |
| 2023-03-20 | Option exercise | 5,000 | $15.04 | 5,000 |
| 2023-03-20 | Open-market sale | 3,903 | $47.51 | 1,097 |
| 2023-03-15 | Option exercise (derivative) | 20,000 | $0.00 | 53,481 |
| 2023-03-15 | Open-market sale | 9,431 | $48.14 | 10,569 |
| 2023-03-15 | Open-market sale | 10,569 | $48.66 | 0 |
| 2023-03-15 | Option exercise | 20,000 | $15.04 | 20,000 |
| 2023-03-02 | Grant / award (derivative) | 38,000 | $0.00 | 38,000 |
| 2022-11-18 | Option exercise (derivative) | 10,000 | $0.00 | 55,481 |
| 2022-11-18 | Option exercise | 10,000 | $15.04 | 10,000 |
| 2022-11-18 | Open-market sale | 9,774 | $57.04 | 226 |
| 2022-11-18 | Open-market sale | 226 | $58.27 | 0 |
| 2022-10-24 | Option exercise (derivative) | 20,000 | $0.00 | 65,481 |
| 2022-10-24 | Open-market sale | 1,164 | $58.98 | 0 |
| 2022-10-24 | Open-market sale | 3,785 | $58.25 | 1,164 |
| 2022-10-24 | Open-market sale | 7,144 | $57.34 | 4,949 |
| 2022-10-24 | Open-market sale | 7,907 | $56.39 | 12,093 |
| 2022-10-24 | Option exercise | 20,000 | $15.04 | 20,000 |
| 2022-02-23 | Grant / award (derivative) | 45,500 | $0.00 | 45,500 |
| 2021-11-23 | Option exercise (derivative) | 4,519 | $0.00 | 85,481 |
| 2021-11-23 | Open-market sale | 1,819 | $58.43 | 0 |
| 2021-11-23 | Option exercise | 4,519 | $15.04 | 4,519 |
| 2021-11-23 | Open-market sale | 2,700 | $57.51 | 1,819 |
| 2021-10-20 | Option exercise (derivative) | 3,000 | $0.00 | 0 |
| 2021-10-20 | Option exercise (derivative) | 20,000 | $0.00 | 90,000 |
| 2021-10-20 | Open-market sale | 19,115 | $60.00 | 3,885 |
| 2021-10-20 | Option exercise | 20,000 | $15.04 | 20,000 |
| 2021-10-20 | Open-market sale | 2,185 | $61.94 | 0 |
| 2021-10-20 | Open-market sale | 1,700 | $60.91 | 2,185 |
| 2021-10-20 | Option exercise | 3,000 | $29.81 | 23,000 |
| 2021-02-25 | Grant / award (derivative) | 28,000 | $0.00 | 28,000 |
| 2021-02-12 | Grant / award (derivative) | 15,909 | — | 15,909 |
| 2021-02-12 | Disposition to issuer (derivative) | 30,000 | — | 0 |
| 2021-02-12 | Grant / award (derivative) | 15,625 | — | 15,625 |
| 2021-02-12 | Grant / award (derivative) | 18,796 | — | 18,796 |
| 2020-02-25 | Grant / award (derivative) | 40,000 | $0.00 | 40,000 |
| 2019-02-27 | Grant / award (derivative) | 35,000 | $0.00 | 35,000 |
| 2018-06-21 | Grant / award (derivative) | 110,000 | $0.00 | 110,000 |
| 2018-02-21 | Grant / award (derivative) | 25,000 | $0.00 | 25,000 |
| 2017-09-28 | Option exercise (derivative) | 1,500 | $0.00 | 17,500 |
| 2017-09-28 | Open-market sale | 1,500 | $70.00 | 0 |
| 2017-09-28 | Option exercise | 1,500 | $27.81 | 1,500 |
| 2017-07-17 | Option exercise (derivative) | 5,000 | $0.00 | 0 |
| 2017-07-17 | Open-market sale | 3,600 | $65.21 | 0 |
| 2017-07-17 | Open-market sale | 1,400 | $64.06 | 3,600 |
| 2017-07-17 | Option exercise | 5,000 | $9.75 | 5,000 |
| 2017-04-17 | Option exercise (derivative) | 3,000 | $0.00 | 5,000 |
| 2017-04-17 | Option exercise (derivative) | 2,000 | $0.00 | 3,000 |
| 2017-04-17 | Open-market sale | 2,900 | $52.21 | 100 |
| 2017-04-17 | Open-market sale | 100 | $52.70 | 0 |
| 2017-04-17 | Option exercise | 2,000 | $29.81 | 2,000 |
| 2017-04-17 | Option exercise | 3,000 | $9.75 | 3,000 |
| 2017-02-22 | Grant / award (derivative) | 30,000 | $0.00 | 30,000 |
| 2016-10-13 | Option exercise (derivative) | 2,000 | $0.00 | 5,000 |
| 2016-10-13 | Option exercise (derivative) | 3,000 | $0.00 | 8,000 |
| 2016-10-13 | Open-market sale | 1,100 | $53.61 | 900 |
| 2016-10-13 | Option exercise | 3,000 | $9.75 | 3,000 |
| 2016-10-13 | Open-market sale | 1,200 | $53.70 | 1,800 |
| 2016-10-13 | Option exercise | 2,000 | $29.81 | 2,000 |
| 2016-10-13 | Open-market sale | 900 | $54.71 | 0 |
| 2016-09-19 | Option exercise (derivative) | 7,000 | $0.00 | 11,000 |
| 2016-09-19 | Option exercise (derivative) | 5,000 | $0.00 | 19,000 |
| 2016-09-19 | Option exercise | 5,000 | $27.81 | 5,000 |
| 2016-09-19 | Option exercise | 7,000 | $9.75 | 7,000 |
| 2016-09-19 | Open-market sale | 500 | $60.01 | 4,500 |
| 2016-09-19 | Open-market sale | 2,700 | $61.83 | 0 |
| 2016-09-19 | Open-market sale | 4,300 | $60.00 | 2,700 |
| 2016-04-13 | Option exercise (derivative) | 2,000 | $0.00 | 18,000 |
| 2016-04-13 | Option exercise (derivative) | 1,000 | $0.00 | 24,000 |
| 2016-04-13 | Option exercise (derivative) | 1,000 | $0.00 | 7,000 |
| 2016-04-13 | Option exercise | 2,000 | $9.75 | 2,000 |
| 2016-04-13 | Open-market sale | 1,600 | $44.78 | 400 |
| 2016-04-13 | Option exercise | 1,000 | $27.81 | 1,000 |
| 2016-04-13 | Open-market sale | 1,000 | $45.29 | 0 |
| 2016-02-24 | Grant / award (derivative) | 25,000 | $0.00 | 25,000 |
| 2016-01-13 | Option exercise (derivative) | 2,000 | $0.00 | 20,000 |
| 2016-01-13 | Option exercise (derivative) | 2,000 | $0.00 | 8,000 |
| 2016-01-13 | Open-market sale | 500 | $51.80 | 0 |
| 2016-01-13 | Open-market sale | 1,500 | $50.67 | 500 |
| 2016-01-13 | Option exercise | 2,000 | $9.75 | 2,000 |
| 2015-08-12 | Option exercise (derivative) | 5,000 | $0.00 | 22,000 |
| 2015-08-12 | Option exercise (derivative) | 2,000 | $0.00 | 10,000 |
| 2015-08-12 | Option exercise | 5,000 | $9.75 | 5,000 |
| 2015-08-12 | Open-market sale | 1,100 | $62.33 | 0 |
| 2015-08-12 | Open-market sale | 900 | $61.51 | 1,100 |
| 2015-08-12 | Option exercise | 2,000 | $29.81 | 2,000 |
| 2015-08-12 | Open-market sale | 2,500 | $61.65 | 2,500 |
| 2015-08-12 | Open-market sale | 2,176 | $62.43 | 324 |
| 2015-03-11 | Grant / award (derivative) | 25,000 | $0.00 | 25,000 |
| 2015-02-10 | Option exercise (derivative) | 2,500 | $0.00 | 27,000 |
| 2015-02-10 | Open-market sale | 2,500 | $21.53 | 0 |
| 2015-02-10 | Option exercise | 2,500 | $9.75 | 2,500 |
| 2014-12-09 | Option exercise (derivative) | 2,500 | $0.00 | 29,500 |
| 2014-12-09 | Open-market sale | 2,500 | $20.00 | 0 |
| 2014-12-09 | Option exercise | 2,500 | $9.75 | 2,500 |
| 2014-10-16 | Option exercise (derivative) | 2,500 | $0.00 | 32,000 |
| 2014-10-16 | Open-market sale | 2,500 | $20.09 | 0 |
| 2014-10-16 | Option exercise | 2,500 | $9.75 | 2,500 |
| 2014-10-16 | Option exercise (derivative) | 2,500 | $0.00 | 32,000 |
| 2014-10-16 | Open-market sale | 2,500 | $20.09 | 0 |
| 2014-10-16 | Option exercise | 2,500 | $9.75 | 2,500 |
| 2014-08-12 | Option exercise (derivative) | 2,500 | $0.00 | 34,500 |
| 2014-08-12 | Open-market sale | 2,500 | $20.74 | 0 |
| 2014-08-12 | Option exercise | 2,500 | $9.75 | 2,500 |
| 2014-06-06 | Option exercise (derivative) | 8,000 | $0.00 | 37,000 |
| 2014-06-06 | Open-market sale | 8,000 | $21.58 | 0 |
| 2014-06-06 | Option exercise | 8,000 | $9.75 | 8,000 |
| 2014-02-04 | Grant / award (derivative) | 12,000 | $0.00 | 12,000 |
| 2013-06-03 | Grant / award (derivative) | 45,000 | $0.00 | 45,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.