SEC CIK 1519910
Chemnitz Gregory R.
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| MTRNview stock → | 5,930 | 2026-03-09 |
Position History — MTRN
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — MTRN
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-09-04 | Grant / award (derivative) | 2 | $0.00 | 3,547 |
| 2026-06-12 | Grant / award (derivative) | 2 | $0.00 | 3,545 |
| 2026-03-09 | Tax withholding | 5 | $144.19 | 5,930 |
| 2026-03-06 | Grant / award (derivative) | 4 | $0.00 | 3,543 |
| 2026-03-06 | Grant / award | 5 | $0.00 | 5,935 |
| 2026-03-03 | Option exercise (derivative) | 3,040 | $0.00 | 0 |
| 2026-03-03 | Option exercise (derivative) | 1,017 | $0.00 | 2,034 |
| 2026-03-03 | Option exercise (derivative) | 1,471 | $0.00 | 736 |
| 2026-03-03 | Tax withholding | 4,445 | $157.26 | 10,447 |
| 2026-03-03 | Option exercise | 3,040 | $113.28 | 12,404 |
| 2026-03-03 | Option exercise | 1,471 | $135.58 | 13,875 |
| 2026-03-03 | Open-market sale | 3,434 | $157.26 | 5,930 |
| 2026-03-03 | Option exercise | 1,017 | $87.36 | 14,892 |
| 2026-03-03 | Open-market sale | 1,083 | $157.52 | 9,364 |
| 2026-03-02 | Tax withholding | 1,211 | $166.59 | 9,364 |
| 2026-03-01 | Option exercise (derivative) | 2,003 | $0.00 | 2,060 |
| 2026-03-01 | Grant / award (derivative) | 1,479 | $0.00 | 3,539 |
| 2026-03-01 | Grant / award (derivative) | 2,265 | $0.00 | 2,265 |
| 2026-03-01 | Option exercise | 2,003 | $0.00 | 10,575 |
| 2026-02-17 | Open-market sale | 4,000 | $157.09 | 8,572 |
| 2026-02-12 | Grant / award | 2,196 | $0.00 | 12,572 |
| 2026-01-31 | Grant / award (derivative) | 98 | $0.00 | 4,063 |
| 2025-12-05 | Grant / award (derivative) | 4 | $0.00 | 3,965 |
| 2025-11-04 | Option exercise (derivative) | 2,254 | $0.00 | 0 |
| 2025-11-04 | Tax withholding | 1,796 | $113.13 | 11,240 |
| 2025-11-04 | Option exercise | 1,459 | $68.82 | 11,835 |
| 2025-11-04 | Tax withholding | 1,053 | $112.96 | 10,782 |
| 2025-11-04 | Option exercise | 2,254 | $80.85 | 13,036 |
| 2025-11-04 | Open-market sale | 864 | $113.23 | 10,376 |
| 2025-09-05 | Grant / award (derivative) | 5 | $0.00 | 3,961 |
| 2025-08-04 | Open-market sale | 2,082 | $105.40 | 10,376 |
| 2025-08-04 | Open-market sale | 918 | $104.65 | 12,458 |
| 2025-06-13 | Grant / award (derivative) | 7 | $0.00 | 3,956 |
| 2025-05-05 | Open-market sale | 930 | $79.85 | 14,446 |
| 2025-05-05 | Open-market sale | 939 | $80.86 | 13,507 |
| 2025-05-05 | Open-market sale | 130 | $81.70 | 13,377 |
| 2025-05-05 | Open-market sale | 1 | $83.33 | 13,376 |
| 2025-03-10 | Tax withholding | 6 | $88.77 | 15,376 |
| 2025-03-07 | Grant / award (derivative) | 7 | $0.00 | 3,949 |
| 2025-03-07 | Grant / award | 8 | $0.00 | 15,382 |
| 2025-03-03 | Tax withholding | 1,356 | $87.36 | 15,374 |
| 2025-03-01 | Option exercise (derivative) | 2,679 | $0.00 | 1,874 |
| 2025-03-01 | Grant / award (derivative) | 2,068 | $0.00 | 3,942 |
| 2025-03-01 | Grant / award (derivative) | 3,051 | $0.00 | 3,051 |
| 2025-03-01 | Option exercise | 2,679 | $0.00 | 16,730 |
| 2025-02-13 | Grant / award | 2,020 | $0.00 | 14,051 |
| 2024-12-06 | Grant / award (derivative) | 6 | $0.00 | 4,553 |
| 2024-11-07 | Open-market sale | 500 | $116.67 | 13,531 |
| 2024-11-07 | Open-market sale | 1,500 | $117.87 | 12,031 |
| 2024-11-04 | Open-market sale | 2,000 | $105.10 | 14,031 |
| 2024-09-06 | Grant / award (derivative) | 6 | $0.00 | 4,544 |
| 2024-08-08 | Open-market sale | 2,000 | $112.87 | 16,031 |
| 2024-06-07 | Grant / award (derivative) | 6 | $0.00 | 4,538 |
| 2024-05-13 | Open-market sale | 369 | $112.52 | 19,662 |
| 2024-05-13 | Open-market sale | 216 | $114.24 | 18,031 |
| 2024-05-13 | Open-market sale | 1,415 | $113.38 | 18,247 |
| 2024-03-08 | Grant / award (derivative) | 7 | $0.00 | 4,532 |
| 2024-03-08 | Tax withholding | 5 | $132.28 | 20,031 |
| 2024-03-08 | Grant / award | 6 | $0.00 | 20,036 |
| 2024-03-01 | Option exercise (derivative) | 1,468 | $0.00 | 2,813 |
| 2024-03-01 | Tax withholding | 643 | $135.58 | 20,030 |
| 2024-03-01 | Option exercise | 1,468 | $0.00 | 20,673 |
| 2024-03-01 | Grant / award (derivative) | 2,207 | $0.00 | 2,207 |
| 2024-03-01 | Grant / award (derivative) | 1,712 | $0.00 | 4,525 |
| 2024-02-21 | Tax withholding | 1,943 | $131.48 | 19,205 |
| 2024-02-20 | Open-market sale | 1,057 | $134.89 | 14,510 |
| 2024-02-20 | Open-market sale | 272 | $131.70 | 17,238 |
| 2024-02-20 | Open-market sale | 882 | $133.85 | 15,567 |
| 2024-02-20 | Open-market sale | 789 | $132.79 | 16,449 |
| 2024-02-17 | Option exercise (derivative) | 2,665 | $0.00 | 4,281 |
| 2024-02-17 | Grant / award | 3,973 | $131.48 | 21,148 |
| 2024-02-17 | Option exercise | 2,665 | $0.00 | 17,175 |
| 2023-12-08 | Grant / award (derivative) | 8 | $0.00 | 6,946 |
| 2023-09-07 | Grant / award (derivative) | 9 | $0.00 | 6,938 |
| 2023-08-29 | Open-market sale | 1,417 | $107.85 | 17,573 |
| 2023-08-29 | Open-market sale | 63 | $108.15 | 17,510 |
| 2023-08-28 | Open-market sale | 320 | $107.11 | 18,990 |
| 2023-06-15 | Grant / award (derivative) | 9 | $0.00 | 6,929 |
| 2023-05-17 | Open-market sale | 2,378 | $102.05 | 19,310 |
| 2023-05-05 | Option exercise (derivative) | 5,522 | $0.00 | 0 |
| 2023-05-05 | Option exercise (derivative) | 2,920 | $0.00 | 1,459 |
| 2023-05-05 | Option exercise (derivative) | 1,127 | $0.00 | 2,254 |
| 2023-05-05 | Tax withholding | 7,191 | $106.52 | 21,688 |
| 2023-05-05 | Option exercise | 5,522 | $50.95 | 24,832 |
| 2023-05-05 | Option exercise | 1,127 | $80.85 | 28,879 |
| 2023-05-05 | Option exercise | 2,920 | $68.82 | 27,752 |
| 2023-03-10 | Grant / award (derivative) | 7 | $0.00 | 6,920 |
| 2023-03-10 | Tax withholding | 3 | $107.02 | 19,310 |
| 2023-03-10 | Grant / award | 5 | $0.00 | 19,313 |
| 2023-03-01 | Grant / award (derivative) | 2,170 | $0.00 | 6,913 |
| 2023-03-01 | Grant / award (derivative) | 3,040 | $0.00 | 3,040 |
| 2023-03-01 | Option exercise (derivative) | 738 | $0.00 | 4,743 |
| 2023-03-01 | Tax withholding | 213 | $113.28 | 19,308 |
| 2023-03-01 | Option exercise | 738 | $0.00 | 19,521 |
| 2023-02-27 | Open-market sale | 577 | $110.00 | 18,783 |
| 2023-02-23 | Open-market sale | 2,423 | $110.00 | 19,360 |
| 2023-02-21 | Tax withholding | 982 | $107.58 | 21,783 |
| 2023-02-21 | Tax withholding | 920 | $107.58 | 22,765 |
| 2023-02-19 | Option exercise (derivative) | 3,077 | $0.00 | 5,481 |
| 2023-02-19 | Grant / award | 3,413 | $0.00 | 23,685 |
| 2023-02-19 | Option exercise | 3,077 | $0.00 | 20,272 |
| 2022-12-08 | Grant / award (derivative) | 13 | $0.00 | 8,558 |
| 2022-09-08 | Grant / award (derivative) | 13 | $0.00 | 8,545 |
| 2022-08-19 | Option exercise (derivative) | 5,358 | $0.00 | 0 |
| 2022-08-19 | Open-market sale | 368 | $96.80 | 17,195 |
| 2022-08-19 | Open-market sale | 2,500 | $96.28 | 17,563 |
| 2022-08-19 | Tax withholding | 8,836 | $96.87 | 20,063 |
| 2022-08-19 | Option exercise | 5,358 | $50.35 | 28,899 |
| 2022-08-19 | Option exercise | 6,346 | $58.30 | 23,541 |
| 2022-06-16 | Grant / award (derivative) | 15 | $0.00 | 8,532 |
| 2022-05-13 | Open-market sale | 4,700 | $80.00 | 17,195 |
| 2022-03-11 | Grant / award (derivative) | 12 | $0.00 | 8,517 |
| 2022-03-01 | Grant / award (derivative) | 3,381 | $0.00 | 3,381 |
| 2022-03-01 | Grant / award (derivative) | 618 | $0.00 | 12,304 |
| 2022-03-01 | Grant / award (derivative) | 2,205 | $0.00 | 11,686 |
| 2022-02-23 | Tax withholding | 1,341 | $81.19 | 18,096 |
| 2022-02-22 | Tax withholding | 1,081 | $82.76 | 19,437 |
| 2022-02-22 | Option exercise (derivative) | 3,799 | $0.00 | 8,517 |
| 2022-02-22 | Option exercise | 3,799 | $0.00 | 21,895 |
| 2022-02-17 | Grant / award | 1,531 | $0.00 | 20,518 |
| 2022-02-01 | Grant / award | 3,022 | $0.00 | 18,987 |
| 2021-12-03 | Grant / award (derivative) | 9 | $0.00 | 9,481 |
| 2021-09-03 | Grant / award (derivative) | 15 | $0.00 | 9,472 |
| 2021-06-11 | Grant / award (derivative) | 15 | $0.00 | 9,457 |
| 2021-03-05 | Grant / award (derivative) | 16 | $0.00 | 10,262 |
| 2021-03-01 | Option exercise (derivative) | 3,431 | $0.00 | 9,442 |
| 2021-03-01 | Tax withholding | 1,007 | $73.22 | 15,965 |
| 2021-03-01 | Option exercise | 3,431 | $73.22 | 16,972 |
| 2021-02-22 | Open-market sale | 6,700 | $67.00 | 13,541 |
| 2021-02-17 | Grant / award (derivative) | 4,379 | $0.00 | 4,379 |
| 2021-02-17 | Grant / award (derivative) | 2,620 | $0.00 | 12,873 |
| 2021-02-03 | Grant / award | 6,860 | $63.72 | 22,339 |
| 2021-02-03 | Tax withholding | 2,098 | $63.72 | 20,241 |
| 2020-11-30 | Grant / award (derivative) | 20 | $0.00 | 10,253 |
| 2020-09-04 | Grant / award (derivative) | 22 | $0.00 | 10,233 |
| 2020-08-13 | Open-market sale | 1,287 | $59.98 | 15,479 |
| 2020-08-10 | Option exercise (derivative) | 5,605 | $61.09 | 0 |
| 2020-08-10 | Option exercise | 5,605 | $35.15 | 21,084 |
| 2020-08-10 | Tax withholding | 1,092 | $61.09 | 19,992 |
| 2020-08-10 | Disposition to issuer | 3,226 | $61.09 | 16,766 |
| 2020-08-10 | Open-market sale | 4,000 | $60.43 | 15,479 |
| 2020-06-10 | Grant / award (derivative) | 21 | $0.00 | 10,211 |
| 2020-03-06 | Grant / award | 3,800 | $59.45 | 20,575 |
| 2020-03-06 | Tax withholding | 1,096 | $59.45 | 19,479 |
| 2020-03-06 | Grant / award (derivative) | 24 | $0.00 | 10,191 |
| 2020-02-24 | Option exercise (derivative) | 3,800 | $0.00 | 7,154 |
| 2020-02-24 | Tax withholding | 1,150 | $48.21 | 16,775 |
| 2020-02-24 | Option exercise | 3,800 | $48.21 | 17,925 |
| 2020-02-19 | Grant / award (derivative) | 3,013 | $0.00 | 10,167 |
| 2020-02-19 | Grant / award (derivative) | 5,522 | $0.00 | 5,522 |
| 2019-12-04 | Grant / award (derivative) | 13 | $0.00 | 10,954 |
| 2019-09-05 | Grant / award (derivative) | 13 | $0.00 | 10,941 |
| 2019-06-05 | Grant / award (derivative) | 12 | $0.00 | 10,928 |
| 2019-03-08 | Tax withholding | 4,174 | $44.99 | 14,125 |
| 2019-03-08 | Grant / award | 8,632 | $44.99 | 18,299 |
| 2019-03-07 | Grant / award (derivative) | 13 | $0.00 | 10,916 |
| 2019-02-22 | Grant / award (derivative) | 3,725 | $0.00 | 15,219 |
| 2019-02-22 | Option exercise (derivative) | 4,316 | $0.00 | 10,903 |
| 2019-02-22 | Grant / award (derivative) | 6,346 | $0.00 | 6,346 |
| 2019-02-22 | Open-market sale | 2,174 | $58.18 | 5,523 |
| 2019-02-22 | Tax withholding | 2,142 | $58.30 | 7,697 |
| 2019-02-22 | Option exercise | 4,316 | $0.00 | 9,839 |
| 2019-02-22 | Option exercise (derivative) | 14,130 | $58.30 | 0 |
| 2019-02-22 | Disposition to issuer | 6,106 | $58.30 | 9,667 |
| 2019-02-22 | Tax withholding | 3,880 | $58.30 | 15,773 |
| 2019-02-22 | Option exercise | 14,130 | $25.19 | 19,653 |
| 2019-02-21 | Open-market sale | 700 | $57.78 | 5,523 |
| 2019-02-21 | Open-market sale | 2,300 | $57.50 | 6,223 |
| 2018-12-03 | Grant / award (derivative) | 7 | $0.00 | 11,494 |
| 2018-11-01 | Open-market sale | 4,000 | $57.50 | 8,523 |
| 2018-09-05 | Grant / award (derivative) | 6 | $0.00 | 11,487 |
| 2018-08-03 | Open-market sale | 2,000 | $63.31 | 12,523 |
| 2018-06-01 | Grant / award (derivative) | 6 | $0.00 | 11,481 |
| 2018-05-08 | Option exercise (derivative) | 8,485 | $36.81 | 0 |
| 2018-05-08 | Disposition to issuer | 5,747 | $54.35 | 14,523 |
| 2018-05-08 | Option exercise | 8,485 | $36.81 | 21,061 |
| 2018-05-08 | Tax withholding | 791 | $54.35 | 20,270 |
| 2018-05-04 | Open-market sale | 5,000 | $52.02 | 12,576 |
| 2018-03-12 | Tax withholding | 897 | $48.60 | 17,576 |
| 2018-03-12 | Grant / award | 3,088 | $48.60 | 18,473 |
| 2018-03-02 | Option exercise (derivative) | 3,058 | $0.00 | 3,359 |
| 2018-03-02 | Option exercise | 3,058 | $0.00 | 16,303 |
| 2018-03-02 | Tax withholding | 918 | $50.70 | 15,385 |
| 2018-03-01 | Grant / award (derivative) | 3,359 | $0.00 | 6,417 |
| 2018-03-01 | Grant / award (derivative) | 5,358 | $0.00 | 5,358 |
| 2017-11-02 | Open-market sale | 4,000 | $50.16 | 16,245 |
| 2017-11-01 | Open-market sale | 3,000 | $51.29 | 13,245 |
| 2017-10-30 | Open-market sale | 3,000 | $49.60 | 13,061 |
| 2017-10-30 | Option exercise (derivative) | 7,865 | $0.00 | 7,865 |
| 2017-10-30 | Option exercise (derivative) | 6,814 | $0.00 | 6,814 |
| 2017-10-30 | Option exercise (derivative) | 8,056 | $0.00 | 8,056 |
| 2017-10-30 | Option exercise (derivative) | 6,492 | $0.00 | 6,492 |
| 2017-10-30 | Option exercise | 7,865 | $33.29 | 42,288 |
| 2017-10-30 | Option exercise | 6,492 | $28.32 | 34,423 |
| 2017-10-30 | Disposition to issuer | 18,681 | $50.90 | 20,245 |
| 2017-10-30 | Option exercise | 6,814 | $39.30 | 19,875 |
| 2017-10-30 | Tax withholding | 3,362 | $50.90 | 38,926 |
| 2017-10-30 | Option exercise | 8,056 | $29.45 | 27,931 |
| 2017-09-05 | Grant / award | 13.15 | $0.00 | 5,071.79 |
| 2017-07-31 | Option exercise (derivative) | 1,373 | $0.00 | 1,373 |
| 2017-07-31 | Option exercise | 1,373 | $27.78 | 17,175 |
| 2017-07-31 | Disposition to issuer | 992 | $38.45 | 16,183 |
| 2017-07-31 | Tax withholding | 122 | $38.45 | 16,061 |
| 2017-07-31 | Open-market sale | 2,250 | $38.25 | 15,802 |
| 2017-07-31 | Open-market sale | 750 | $38.40 | 18,052 |
| 2017-06-02 | Grant / award | 14.51 | $0.00 | 5,058.63 |
| 2017-05-08 | Grant / award | 4,513 | $34.85 | 21,096 |
| 2017-05-08 | Tax withholding | 1,437 | $34.85 | 19,659 |
| 2017-03-03 | Grant / award | 13.47 | $35.49 | 5,044.12 |
| 2017-02-23 | Grant / award (derivative) | 5,605 | $35.15 | 58,820 |
| 2017-02-23 | Grant / award (derivative) | 3,800 | $0.00 | 15,687 |
| 2017-02-17 | Tax withholding | 1,158 | $39.60 | 16,583 |
| 2017-02-17 | Grant / award | 6,116 | $0.00 | 17,741 |
| 2016-11-25 | Grant / award | 12.3 | $38.77 | 5,030.66 |
| 2016-09-02 | Grant / award | 16 | $29.69 | 5,018.36 |
| 2016-06-01 | Grant / award | 19.76 | $23.95 | 5,002.36 |
| 2016-03-02 | Grant / award | 17.18 | $26.02 | 4,982.59 |
| 2016-02-22 | Grant / award (derivative) | 14,130 | $0.00 | 53,215 |
| 2016-02-22 | Grant / award (derivative) | 4,316 | $0.00 | 14,762 |
| 2016-02-16 | Grant / award | 2,485 | $0.00 | 22,974 |
| 2016-02-16 | Tax withholding | 903 | $28.00 | 22,071 |
| 2015-11-27 | Grant / award | 8 | $29.18 | 20,481 |
| 2015-11-27 | Grant / award | 15.27 | $29.18 | 4,965.42 |
| 2015-09-01 | Grant / award | 8 | $29.96 | 20,481 |
| 2015-09-01 | Grant / award | 14.57 | $30.48 | 4,950.15 |
| 2015-06-08 | Grant / award | 11.56 | $38.35 | 4,935.58 |
| 2015-06-04 | Grant / award | 6 | $37.30 | 20,473 |
| 2015-03-03 | Grant / award (derivative) | 8,485 | $0.00 | 8,485 |
| 2015-03-03 | Grant / award | 14 | $36.81 | 20,467 |
| 2015-03-03 | Grant / award | 11.3 | $36.96 | 4,924.02 |
| 2015-03-03 | Grant / award | 3,058 | $36.81 | 20,453 |
| 2015-03-02 | Tax withholding | 1,159 | $37.07 | 17,395 |
| 2015-02-17 | Grant / award | 3,340 | $35.23 | 19,695 |
| 2015-02-17 | Tax withholding | 1,141 | $35.23 | 18,554 |
| 2014-11-20 | Grant / award | 11.64 | $35.78 | 4,912.72 |
| 2014-11-20 | Grant / award | 14 | $36.11 | 16,355 |
| 2014-08-20 | Grant / award | 12.59 | $33.01 | 4,901.08 |
| 2014-08-20 | Grant / award | 16 | $32.98 | 16,341 |
| 2014-06-04 | Grant / award | 12.22 | $33.91 | 4,888.49 |
| 2014-06-04 | Grant / award | 15 | $34.38 | 16,325 |
| 2014-05-08 | Grant / award (derivative) | 7,865 | $0.00 | 7,865 |
| 2014-05-08 | Grant / award | 4,513 | $0.00 | 16,310 |
| 2014-05-05 | Tax withholding | 1,165 | $33.07 | 11,797 |
| 2014-03-06 | Grant / award | 22 | $34.13 | 12,962 |
| 2013-11-12 | Grant / award | 4,851 | $29.21 | 4,851 |
| 2013-05-13 | Disposition to issuer | 7,328 | $28.80 | 16,258 |
| 2013-05-09 | Option exercise (derivative) | 16,801 | $0.00 | 0 |
| 2013-05-09 | Tax withholding | 2,582 | $29.00 | 30,477 |
| 2013-05-09 | Option exercise | 16,801 | $15.01 | 33,059 |
| 2013-05-09 | Disposition to issuer | 7,252 | $29.00 | 23,586 |
| 2013-05-09 | Tax withholding | 844 | $29.00 | 30,838 |
| 2013-05-09 | Option exercise | 9,901 | $21.24 | 31,682 |
| 2013-05-09 | Disposition to issuer | 8,696 | $29.00 | 21,781 |
| 2013-03-06 | Grant / award (derivative) | 6,492 | $0.00 | 6,492 |
| 2013-03-06 | Grant / award | 2,875 | $0.00 | 16,258 |
| 2013-03-06 | Grant / award (derivative) | 6,913 | $0.00 | 6,913 |
| 2012-03-01 | Grant / award (derivative) | 8,056 | $0.00 | 8,056 |
| 2012-03-01 | Disposition to issuer | 1,887 | $29.50 | 9,860 |
| 2012-03-01 | Grant / award | 3,523 | $29.45 | 13,832 |
| 2012-03-01 | Disposition to issuer | 1,100 | $29.66 | 11,747 |
| 2012-03-01 | Disposition to issuer | 985 | $30.01 | 12,847 |
| 2012-02-10 | Tax withholding | 1,986 | $29.61 | 10,309 |
| 2011-05-04 | — | — | — | 2,615 |
| 2011-05-04 | Grant / award (derivative) | 6,814 | $0.00 | 6,814 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.