SEC CIK 1433241
Klasko Stephen K. M.D.
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| TFXview stock → | 9,332.55 | 2025-05-09 |
Position History — TFX
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — TFX
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2025-05-09 | Grant / award (derivative) | 2,226 | $0.00 | 2,226 |
| 2025-05-09 | Grant / award | 1,357 | $0.00 | 9,332.55 |
| 2025-02-20 | Option exercise (derivative) | 2,674 | $0.00 | 0 |
| 2025-02-20 | Option exercise | 2,674 | $121.00 | 9,826.55 |
| 2025-02-20 | Tax withholding | 1,851 | $174.82 | 7,975.55 |
| 2024-05-07 | Grant / award (derivative) | 1,349 | $0.00 | 1,349 |
| 2024-05-07 | Grant / award | 838 | $0.00 | 7,137.14 |
| 2023-12-13 | Option exercise (derivative) | 3,021 | $0.00 | 0 |
| 2023-12-13 | Option exercise | 3,021 | $101.12 | 7,584.46 |
| 2023-12-13 | Tax withholding | 1,296 | $235.89 | 6,288.46 |
| 2023-05-09 | Grant / award (derivative) | 1,076 | $0.00 | 1,076 |
| 2023-05-09 | Grant / award | 681 | $0.00 | 4,563.46 |
| 2023-01-27 | Option exercise (derivative) | 3,014 | $0.00 | 0 |
| 2023-01-27 | Option exercise | 3,014 | $78.50 | 4,849.46 |
| 2023-01-27 | Tax withholding | 967 | $244.68 | 3,882.46 |
| 2022-05-03 | Grant / award (derivative) | 969 | $0.00 | 969 |
| 2022-05-03 | Grant / award | 399 | $0.00 | 1,827.54 |
| 2021-07-12 | Option exercise (derivative) | 3,564 | $59.75 | 0 |
| 2021-07-12 | Open-market sale | 150 | $423.95 | 1,424.18 |
| 2021-07-12 | Open-market sale | 2,214 | $422.00 | 2,774.18 |
| 2021-07-12 | Open-market sale | 1,200 | $423.39 | 1,574.18 |
| 2021-07-12 | Option exercise | 3,564 | $59.75 | 4,988.18 |
| 2021-05-04 | Grant / award (derivative) | 771 | $0.00 | 771 |
| 2021-05-04 | Grant / award | 300 | $0.00 | 1,424.18 |
| 2020-10-26 | Option exercise (derivative) | 200 | $0.00 | 0 |
| 2020-10-26 | Open-market sale | 200 | $361.38 | 1,120.94 |
| 2020-10-26 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-09-25 | Option exercise (derivative) | 200 | $0.00 | 200 |
| 2020-09-25 | Open-market sale | 200 | $326.15 | 1,120.94 |
| 2020-09-25 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-08-25 | Option exercise (derivative) | 200 | $0.00 | 400 |
| 2020-08-25 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-08-25 | Open-market sale | 200 | $373.74 | 1,120.94 |
| 2020-07-27 | Option exercise (derivative) | 200 | $0.00 | 600 |
| 2020-07-27 | Open-market sale | 200 | $386.35 | 1,120.94 |
| 2020-07-27 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-06-25 | Option exercise (derivative) | 200 | $0.00 | 800 |
| 2020-06-25 | Grant / award | 200 | $356.07 | 1,120.94 |
| 2020-06-25 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-05-26 | Option exercise (derivative) | 200 | $0.00 | 1,000 |
| 2020-05-26 | Open-market sale | 200 | $375.14 | 1,120.94 |
| 2020-05-26 | Option exercise | 200 | $58.25 | 1,320.94 |
| 2020-05-05 | Grant / award (derivative) | 1,187 | $0.00 | 1,187 |
| 2020-05-05 | Grant / award | 383 | $0.00 | 1,120.94 |
| 2020-04-27 | Option exercise (derivative) | 200 | $0.00 | 1,200 |
| 2020-04-27 | Option exercise | 200 | $58.25 | 937.94 |
| 2020-04-27 | Open-market sale | 200 | $342.26 | 737.94 |
| 2020-03-25 | Option exercise (derivative) | 200 | $0.00 | 1,400 |
| 2020-03-25 | Open-market sale | 200 | $254.75 | 737.94 |
| 2020-03-25 | Option exercise | 200 | $58.25 | 937.94 |
| 2020-02-25 | Option exercise (derivative) | 200 | $0.00 | 1,600 |
| 2020-02-25 | Option exercise | 200 | $58.25 | 937.94 |
| 2020-02-25 | Open-market sale | 200 | $360.95 | 737.94 |
| 2020-01-27 | Option exercise (derivative) | 200 | $0.00 | 1,800 |
| 2020-01-27 | Open-market sale | 200 | $375.71 | 736 |
| 2020-01-27 | Option exercise | 200 | $58.25 | 936 |
| 2019-12-26 | Option exercise (derivative) | 200 | $0.00 | 0 |
| 2019-12-26 | Option exercise | 200 | $61.34 | 936 |
| 2019-12-26 | Open-market sale | 200 | $374.35 | 736 |
| 2019-11-25 | Option exercise (derivative) | 200 | $0.00 | 200 |
| 2019-11-25 | Option exercise | 200 | $61.34 | 936 |
| 2019-11-25 | Open-market sale | 200 | $346.63 | 736 |
| 2019-10-25 | Option exercise (derivative) | 200 | $0.00 | 400 |
| 2019-10-25 | Open-market sale | 200 | $316.01 | 736 |
| 2019-10-25 | Option exercise | 200 | $61.34 | 936 |
| 2019-09-25 | Option exercise (derivative) | 200 | $0.00 | 600 |
| 2019-09-25 | Open-market sale | 200 | $342.50 | 736 |
| 2019-09-25 | Option exercise | 200 | $61.34 | 936 |
| 2019-08-26 | Option exercise (derivative) | 200 | $0.00 | 800 |
| 2019-08-26 | Open-market sale | 200 | $361.06 | 736 |
| 2019-08-26 | Option exercise | 200 | $61.34 | 936 |
| 2019-07-25 | Option exercise (derivative) | 200 | $0.00 | 1,000 |
| 2019-07-25 | Open-market sale | 200 | $343.28 | 736 |
| 2019-07-25 | Option exercise | 200 | $61.34 | 936 |
| 2019-06-25 | Option exercise (derivative) | 200 | $0.00 | 1,200 |
| 2019-06-25 | Option exercise | 200 | $61.34 | 936 |
| 2019-06-25 | Open-market sale | 200 | $332.17 | 736 |
| 2019-05-28 | Option exercise (derivative) | 200 | $0.00 | 1,400 |
| 2019-05-28 | Option exercise | 200 | $61.34 | 936 |
| 2019-05-28 | Open-market sale | 200 | $295.81 | 736 |
| 2019-05-07 | Grant / award (derivative) | 976 | $0.00 | 976 |
| 2019-05-07 | Grant / award | 347 | $0.00 | 736 |
| 2019-04-25 | Option exercise (derivative) | 200 | $0.00 | 1,600 |
| 2019-04-25 | Option exercise | 200 | $61.34 | 589 |
| 2019-04-25 | Open-market sale | 200 | $277.14 | 389 |
| 2019-03-28 | Option exercise (derivative) | 200 | $0.00 | 1,800 |
| 2019-03-28 | Option exercise | 200 | $61.34 | 589 |
| 2019-03-28 | Open-market sale | 200 | $301.68 | 389 |
| 2018-05-16 | Grant / award (derivative) | 1,131 | $0.00 | 1,131 |
| 2018-05-16 | Grant / award | 389 | $0.00 | 8,269 |
| 2018-02-01 | Option exercise (derivative) | 200 | $0.00 | 0 |
| 2018-02-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2018-02-01 | Open-market sale | 200 | $276.44 | 7,880 |
| 2018-01-02 | Option exercise (derivative) | 200 | $0.00 | 200 |
| 2018-01-02 | Option exercise | 200 | $46.12 | 8,080 |
| 2018-01-02 | Open-market sale | 200 | $248.96 | 7,880 |
| 2017-12-01 | Option exercise (derivative) | 200 | $46.12 | 400 |
| 2017-12-01 | Open-market sale | 200 | $265.32 | 7,880 |
| 2017-12-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-11-01 | Option exercise (derivative) | 200 | $46.12 | 600 |
| 2017-11-01 | Open-market sale | 200 | $237.18 | 7,880 |
| 2017-11-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-10-02 | Option exercise (derivative) | 200 | $46.12 | 800 |
| 2017-10-02 | Open-market sale | 200 | $241.88 | 7,880 |
| 2017-10-02 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-09-01 | Option exercise (derivative) | 200 | $46.12 | 1,000 |
| 2017-09-01 | Open-market sale | 200 | $211.75 | 7,880 |
| 2017-09-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-08-01 | Option exercise (derivative) | 200 | $46.12 | 1,200 |
| 2017-08-01 | Open-market sale | 200 | $208.41 | 7,880 |
| 2017-08-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-07-03 | Option exercise (derivative) | 200 | $46.12 | 1,400 |
| 2017-07-03 | Open-market sale | 200 | $208.10 | 7,880 |
| 2017-07-03 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-06-01 | Option exercise (derivative) | 200 | $46.12 | 1,600 |
| 2017-06-01 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-06-01 | Open-market sale | 200 | $199.93 | 7,880 |
| 2017-05-15 | Option exercise (derivative) | 200 | $46.12 | 1,800 |
| 2017-05-15 | Open-market sale | 200 | $192.04 | 7,880 |
| 2017-05-15 | Option exercise | 200 | $46.12 | 8,080 |
| 2017-05-12 | Option exercise (derivative) | 5,000 | $56.75 | 0 |
| 2017-05-12 | Option exercise | 5,000 | $56.75 | 12,880 |
| 2017-05-12 | Open-market sale | 2,600 | $193.57 | 10,280 |
| 2017-05-12 | Open-market sale | 2,400 | $193.67 | 7,880 |
| 2017-05-09 | Grant / award (derivative) | 1,410 | $0.00 | 1,410 |
| 2017-05-09 | Grant / award | 440 | $0.00 | 7,880 |
| 2016-05-03 | Grant / award (derivative) | 2,002 | $0.00 | 2,002 |
| 2016-05-03 | Grant / award | 566 | — | 7,440 |
| 2015-05-05 | Grant / award | 645 | — | 6,874 |
| 2015-03-16 | Grant / award | 128 | — | 6,229 |
| 2015-02-25 | Grant / award (derivative) | 2,674 | $0.00 | 2,674 |
| 2014-05-02 | Grant / award | 627 | — | 6,101 |
| 2014-02-26 | Grant / award (derivative) | 2,498 | $0.00 | 2,498 |
| 2014-02-26 | Grant / award (derivative) | 3,021 | $0.00 | 3,021 |
| 2013-05-03 | Grant / award | 785 | — | 5,474 |
| 2013-02-26 | Grant / award (derivative) | 3,014 | $0.00 | 3,014 |
| 2012-05-04 | Grant / award | 1,041 | — | 4,689 |
| 2012-02-28 | Grant / award (derivative) | 3,564 | $59.75 | 3,564 |
| 2011-04-29 | Grant / award | 800 | — | 3,648 |
| 2011-03-01 | Grant / award (derivative) | 2,000 | $58.25 | 2,000 |
| 2010-04-30 | Grant / award | 797 | — | 2,848 |
| 2010-03-01 | Grant / award (derivative) | 2,000 | $61.34 | 2,000 |
| 2009-05-01 | Grant / award | 1,170 | — | 2,051 |
| 2009-03-02 | Grant / award (derivative) | 2,000 | $46.12 | 2,000 |
| 2008-05-02 | Grant / award (derivative) | 5,000 | $56.75 | 5,000 |
| 2008-05-02 | Grant / award | 881 | — | 881 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.