SEC CIK 1480330
Hwang Donghyun Thomas
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| MTSIview stock → | 31,195 | 2026-10-21 |
Position History — MTSI
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — MTSI
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-10-21 | Grant / award | 1,439 | $0.00 | 31,195 |
| 2026-06-25 | Open-market sale | 100 | $391.94 | 29,756 |
| 2026-06-25 | Open-market sale | 291 | $389.74 | 29,856 |
| 2026-06-25 | Open-market sale | 400 | $388.65 | 30,147 |
| 2026-06-25 | Open-market sale | 200 | $387.25 | 30,547 |
| 2026-06-25 | Open-market sale | 400 | $386.62 | 30,747 |
| 2026-06-25 | Open-market sale | 9 | $384.35 | 31,147 |
| 2026-06-25 | Open-market sale | 300 | $382.91 | 31,156 |
| 2026-06-25 | Open-market sale | 420 | $382.04 | 31,456 |
| 2026-06-25 | Open-market sale | 100 | $379.80 | 31,876 |
| 2026-06-25 | Open-market sale | 200 | $375.34 | 31,976 |
| 2026-06-25 | Open-market sale | 100 | $369.99 | 32,176 |
| 2026-06-25 | Open-market sale | 100 | $367.30 | 32,276 |
| 2026-05-18 | Open-market sale | 95 | $381.23 | 32,376 |
| 2026-05-18 | Open-market sale | 100 | $377.70 | 32,471 |
| 2026-05-18 | Open-market sale | 100 | $369.06 | 32,571 |
| 2026-05-18 | Open-market sale | 200 | $367.50 | 32,671 |
| 2026-05-18 | Open-market sale | 100 | $364.93 | 32,871 |
| 2026-05-18 | Open-market sale | 100 | $362.89 | 32,971 |
| 2026-05-18 | Open-market sale | 500 | $360.38 | 33,071 |
| 2026-05-18 | Open-market sale | 300 | $358.84 | 33,571 |
| 2026-05-18 | Open-market sale | 500 | $356.68 | 33,871 |
| 2026-05-18 | Open-market sale | 300 | $355.06 | 34,371 |
| 2026-05-18 | Open-market sale | 300 | $353.32 | 34,671 |
| 2026-05-15 | Grant / award | 85 | $138.13 | 34,971 |
| 2026-04-30 | Open-market sale | 65 | $281.59 | 34,886 |
| 2026-04-30 | Open-market sale | 200 | $280.88 | 34,951 |
| 2026-04-30 | Open-market sale | 635 | $279.75 | 35,151 |
| 2026-04-30 | Open-market sale | 700 | $278.42 | 35,786 |
| 2026-04-30 | Open-market sale | 200 | $276.81 | 36,486 |
| 2026-04-30 | Open-market sale | 100 | $275.73 | 36,686 |
| 2026-04-30 | Open-market sale | 1,518 | $274.79 | 36,786 |
| 2026-04-30 | Open-market sale | 200 | $273.48 | 38,304 |
| 2026-04-30 | Open-market sale | 100 | $271.40 | 38,504 |
| 2026-02-02 | Open-market sale | 200 | $235.81 | 38,604 |
| 2026-02-02 | Open-market sale | 300 | $234.83 | 38,804 |
| 2026-02-02 | Open-market sale | 500 | $232.68 | 39,104 |
| 2026-02-02 | Open-market sale | 600 | $231.45 | 39,604 |
| 2026-02-02 | Open-market sale | 300 | $230.20 | 40,204 |
| 2026-02-02 | Open-market sale | 359 | $228.70 | 40,504 |
| 2026-02-02 | Open-market sale | 800 | $227.92 | 40,863 |
| 2026-02-02 | Open-market sale | 400 | $226.58 | 41,663 |
| 2026-02-02 | Open-market sale | 100 | $225.01 | 42,063 |
| 2026-02-02 | Open-market sale | 1,715 | $217.38 | 42,163 |
| 2025-12-04 | Open-market sale | 100 | $189.36 | 43,878 |
| 2025-12-04 | Open-market sale | 300 | $188.62 | 43,978 |
| 2025-12-04 | Open-market sale | 880 | $187.60 | 44,278 |
| 2025-12-04 | Open-market sale | 875 | $186.76 | 45,158 |
| 2025-12-04 | Open-market sale | 400 | $185.35 | 46,033 |
| 2025-12-04 | Open-market sale | 200 | $184.24 | 46,433 |
| 2025-12-04 | Open-market sale | 1,617 | $183.40 | 46,633 |
| 2025-11-20 | Gift | 1,500 | $0.00 | 48,250 |
| 2025-11-19 | Open-market sale | 304 | $163.64 | 49,750 |
| 2025-11-19 | Open-market sale | 596 | $162.38 | 50,054 |
| 2025-11-19 | Open-market sale | 1,177 | $161.38 | 50,650 |
| 2025-11-19 | Open-market sale | 1,421 | $160.35 | 51,827 |
| 2025-11-19 | Open-market sale | 291 | $158.27 | 53,248 |
| 2025-11-14 | Grant / award | 83 | $104.94 | 53,539 |
| 2025-11-08 | Tax withholding | 471 | $170.03 | 53,456 |
| 2025-11-06 | Grant / award | 38,591 | $0.00 | 71,044 |
| 2025-11-06 | Tax withholding | 17,117 | $166.92 | 53,927 |
| 2025-10-28 | Grant / award | 2,332 | $0.00 | 32,453 |
| 2025-10-27 | Tax withholding | 412 | $146.39 | 30,121 |
| 2025-10-23 | Tax withholding | 246 | $139.31 | 30,533 |
| 2025-07-22 | Option exercise (derivative) | 5,000 | $0.00 | 0 |
| 2025-07-22 | Open-market sale | 937 | $139.89 | 30,779 |
| 2025-07-22 | Open-market sale | 575 | $138.73 | 31,716 |
| 2025-07-22 | Option exercise | 5,000 | $16.06 | 35,779 |
| 2025-07-22 | Open-market sale | 157 | $137.41 | 32,291 |
| 2025-07-22 | Open-market sale | 2,231 | $136.78 | 32,448 |
| 2025-07-22 | Open-market sale | 1,100 | $135.85 | 34,679 |
| 2025-05-16 | Grant / award | 120 | $104.55 | 30,779 |
| 2025-05-08 | Open-market sale | 2,416 | $117.89 | 33,187 |
| 2025-05-08 | Open-market sale | 2,528 | $119.26 | 30,659 |
| 2025-04-30 | Open-market sale | 6,471 | $100.00 | 35,603 |
| 2025-03-03 | Open-market sale | 1,583 | $116.61 | 42,074 |
| 2025-01-27 | Open-market sale | 7,355 | $133.00 | 43,657 |
| 2024-11-15 | Grant / award | 95 | $86.65 | 51,012 |
| 2024-11-08 | Tax withholding | 471 | $137.86 | 50,917 |
| 2024-11-07 | Tax withholding | 11,173 | $139.14 | 51,388 |
| 2024-11-07 | Grant / award | 25,459 | $0.00 | 62,561 |
| 2024-11-06 | Open-market sale | 1,500 | $118.38 | 37,102 |
| 2024-10-28 | Tax withholding | 386 | $117.54 | 38,602 |
| 2024-10-27 | Tax withholding | 673 | $121.70 | 38,988 |
| 2024-10-23 | Grant / award | 2,513 | $0.00 | 39,661 |
| 2024-09-03 | Open-market sale | 900 | $105.11 | 38,085 |
| 2024-09-03 | Open-market sale | 1,428 | $103.21 | 40,095 |
| 2024-09-03 | Open-market sale | 937 | $106.56 | 37,148 |
| 2024-09-03 | Open-market sale | 1,110 | $104.21 | 38,985 |
| 2024-07-22 | Option exercise (derivative) | 5,000 | $0.00 | 5,000 |
| 2024-07-22 | Open-market sale | 300 | $108.17 | 41,523 |
| 2024-07-22 | Open-market sale | 1,236 | $107.41 | 41,823 |
| 2024-07-22 | Open-market sale | 2,115 | $105.34 | 44,408 |
| 2024-07-22 | Option exercise | 5,000 | $16.06 | 46,523 |
| 2024-07-22 | Open-market sale | 1,349 | $106.18 | 43,059 |
| 2024-05-10 | Grant / award | 198 | $65.54 | 41,523 |
| 2024-05-08 | Open-market sale | 5,415 | $102.84 | 41,325 |
| 2024-05-08 | Open-market sale | 1,585 | $102.01 | 46,740 |
| 2024-03-11 | Open-market sale | 2,991 | $92.79 | 48,325 |
| 2024-03-11 | Open-market sale | 6,406 | $91.99 | 51,316 |
| 2024-01-29 | Open-market sale | 200 | $88.27 | 57,722 |
| 2024-01-29 | Open-market sale | 6,034 | $87.75 | 57,922 |
| 2023-12-12 | Open-market sale | 2,404 | $87.69 | 63,956 |
| 2023-12-12 | Open-market sale | 9,113 | $87.33 | 66,360 |
| 2023-11-28 | Option exercise (derivative) | 5,000 | $0.00 | 10,000 |
| 2023-11-28 | Open-market sale | 12,806 | $83.27 | 75,799 |
| 2023-11-28 | Open-market sale | 11,953 | $82.47 | 88,605 |
| 2023-11-28 | Option exercise | 5,000 | $16.06 | 100,558 |
| 2023-11-28 | Open-market sale | 326 | $83.97 | 75,473 |
| 2023-11-09 | Tax withholding | 3,100 | $72.41 | 95,558 |
| 2023-11-09 | Grant / award | 9,705 | $0.00 | 98,465 |
| 2023-11-08 | Grant / award | 3,187 | $0.00 | 88,760 |
| 2023-10-28 | Tax withholding | 385 | $72.00 | 85,573 |
| 2023-10-27 | Tax withholding | 672 | $72.00 | 85,958 |
| 2023-05-15 | Tax withholding | 652 | $57.14 | 86,630 |
| 2022-12-01 | Open-market sale | 2,575 | $68.69 | 87,081 |
| 2022-11-10 | Open-market sale | 2,000 | $67.67 | 94,230 |
| 2022-11-10 | Open-market sale | 4,658 | $67.88 | 89,656 |
| 2022-11-04 | Open-market sale | 4,000 | $63.22 | 96,230 |
| 2022-11-03 | Tax withholding | 10,461 | $60.26 | 100,230 |
| 2022-11-03 | Grant / award | 23,646 | $0.00 | 110,691 |
| 2022-10-28 | Tax withholding | 385 | $58.71 | 89,735 |
| 2022-10-28 | Tax withholding | 2,690 | $58.71 | 87,045 |
| 2022-10-27 | Tax withholding | 298 | $56.15 | 90,120 |
| 2022-10-27 | Grant / award | 3,817 | $0.00 | 90,418 |
| 2022-08-15 | Open-market sale | 9,873 | $66.55 | 86,601 |
| 2022-05-13 | Tax withholding | 924 | $52.53 | 96,474 |
| 2021-12-08 | Open-market sale | 4,000 | $76.36 | 97,123 |
| 2021-12-07 | Open-market sale | 1,800 | $76.62 | 101,123 |
| 2021-12-01 | Open-market sale | 8,000 | $75.25 | 102,923 |
| 2021-11-22 | Open-market sale | 642 | $78.88 | 110,923 |
| 2021-11-17 | Open-market sale | 2,500 | $76.95 | 111,565 |
| 2021-11-11 | Open-market sale | 4,200 | $72.19 | 114,065 |
| 2021-11-05 | Open-market sale | 520 | $76.76 | 118,052 |
| 2021-11-05 | Open-market sale | 700 | $75.14 | 118,572 |
| 2021-11-04 | Grant / award | 11,214 | $0.00 | 90,286 |
| 2021-11-04 | Grant / award | 19,194 | $0.00 | 109,480 |
| 2021-11-04 | Tax withholding | 33,237 | $74.52 | 120,772 |
| 2021-11-04 | Open-market sale | 1,500 | $71.20 | 119,272 |
| 2021-11-04 | Grant / award | 36,666 | $0.00 | 146,146 |
| 2021-11-04 | Grant / award | 7,863 | $0.00 | 154,009 |
| 2021-11-03 | Open-market sale | 518 | $73.22 | 79,072 |
| 2021-10-29 | Tax withholding | 2,765 | $69.82 | 79,591 |
| 2021-10-28 | Tax withholding | 385 | $69.63 | 82,356 |
| 2021-10-27 | Grant / award | 3,044 | $0.00 | 82,741 |
| 2021-09-15 | Open-market sale | 1,578 | $62.49 | 80,341 |
| 2021-09-15 | Open-market sale | 644 | $62.80 | 79,697 |
| 2021-09-08 | Open-market sale | 643 | $63.63 | 81,919 |
| 2021-05-14 | Tax withholding | 1,192 | $51.08 | 82,562 |
| 2021-02-16 | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2020-12-08 | Open-market sale | 4,648 | $49.95 | 83,413 |
| 2020-12-07 | Open-market sale | 4,520 | $48.88 | 88,061 |
| 2020-12-03 | Open-market sale | 2,762 | $46.66 | 92,581 |
| 2020-11-27 | Open-market sale | 2,824 | $45.15 | 95,343 |
| 2020-11-13 | Grant / award | 409 | $23.95 | 98,167 |
| 2020-11-09 | Open-market sale | 1,093 | $44.22 | 97,758 |
| 2020-11-05 | Tax withholding | 28,190 | $41.43 | 98,851 |
| 2020-11-05 | Grant / award | 11,215 | $0.00 | 127,041 |
| 2020-11-05 | Grant / award | 55,854 | $0.00 | 115,826 |
| 2020-10-29 | Tax withholding | 2,689 | $36.80 | 59,972 |
| 2020-10-28 | Grant / award | 5,242 | $0.00 | 62,661 |
| 2020-07-30 | Open-market sale | 5,000 | $43.45 | 61,301 |
| 2020-07-30 | Open-market sale | 3,882 | $42.22 | 57,419 |
| 2020-07-21 | Open-market sale | 632 | $39.22 | 66,301 |
| 2020-07-10 | Open-market sale | 189 | $37.70 | 66,933 |
| 2020-07-06 | Open-market sale | 981 | $36.20 | 67,122 |
| 2020-05-15 | Tax withholding | 1,506 | $28.18 | 68,103 |
| 2019-11-15 | Grant / award | 518 | $12.03 | 69,089 |
| 2019-10-29 | Grant / award | 7,477 | $0.00 | 48,571 |
| 2019-10-29 | Grant / award | 20,000 | $0.00 | 68,571 |
| 2019-05-17 | Grant / award | 981 | $12.03 | 41,094 |
| 2019-05-15 | Tax withholding | 1,152 | $14.35 | 40,113 |
| 2018-11-19 | Disposition to issuer (derivative) | 10,000 | — | 0 |
| 2018-11-16 | Grant / award | 189 | $15.31 | 41,265 |
| 2018-11-06 | Grant / award | 8,937 | $0.00 | 41,076 |
| 2018-05-18 | Grant / award | 632 | $19.25 | 32,139 |
| 2018-05-15 | Tax withholding | 6,494 | $23.04 | 31,507 |
| 2018-02-23 | Open-market buy | 2,500 | $21.05 | 38,001 |
| 2018-02-22 | Open-market buy | 2,500 | $21.70 | 35,501 |
| 2017-11-17 | Grant / award | 334 | $27.92 | 33,001 |
| 2017-11-09 | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2017-11-09 | Grant / award | 3,915 | $0.00 | 32,667 |
| 2017-11-09 | Grant / award | 6,410 | $0.00 | 28,752 |
| 2017-11-09 | Grant / award | 6,518 | $0.00 | 22,342 |
| 2017-11-09 | Grant / award | 3,646 | $0.00 | 15,824 |
| 2017-07-25 | Open-market sale | 6,840 | $64.75 | 12,178 |
| 2017-07-24 | Open-market sale | 4,401 | $63.50 | 19,018 |
| 2017-07-12 | Open-market sale | 3,492 | $60.25 | 23,419 |
| 2017-07-12 | Open-market sale | 3,492 | $60.25 | 23,419 |
| 2017-07-11 | Open-market sale | 733 | $58.50 | 26,911 |
| 2017-07-11 | Open-market sale | 733 | $58.50 | 26,911 |
| 2017-05-15 | Tax withholding | 8,663 | $51.31 | 27,323 |
| 2017-04-19 | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2016-11-23 | Open-market sale | 8,650 | $47.70 | 46,070 |
| 2016-11-17 | Open-market sale | 6,990 | $45.50 | 54,282 |
| 2016-11-09 | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2016-11-09 | Grant / award | 3,642 | $0.00 | 48,344 |
| 2016-11-09 | Grant / award | 6,410 | $0.00 | 61,272 |
| 2016-11-09 | Grant / award | 6,518 | $0.00 | 54,862 |
| 2016-09-06 | Open-market sale | 2,000 | $43.80 | 44,702 |
| 2016-08-29 | Open-market sale | 1,729 | $41.80 | 46,702 |
| 2016-05-15 | Tax withholding | 10,080 | $36.80 | 35,990 |
| 2016-04-01 | Open-market sale | 4,534 | $45.00 | 48,431 |
| 2015-12-29 | Open-market sale | 5,000 | $42.00 | 58,950 |
| 2015-12-21 | Open-market sale | 2,000 | $40.00 | 63,950 |
| 2015-11-20 | Open-market sale | 466 | $38.00 | 65,950 |
| 2015-11-13 | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2015-11-13 | Grant / award | 4,273 | $0.00 | 66,416 |
| 2015-11-09 | Grant / award | 6,518 | $0.00 | 62,143 |
| 2015-05-15 | Tax withholding | 5,985 | $35.14 | 52,965 |
| 2015-04-22 | Grant / award (derivative) | 10,000 | $0.00 | 10,000 |
| 2015-04-22 | Grant / award | 23,899 | $0.00 | 75,179 |
| 2015-01-21 | — | — | — | 51,280 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.