John Tseng-Chung Lee
CIK 1414656 · View on SEC EDGAR ↗
Insider
First SEC filing: Feb. 12, 2010 · Latest: Feb. 12, 2010
On this page
Insider at
Insider transactions
0 buys (P)
6 sells (S)
Net:
$-13,878,072
+ 94 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
94 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 14, 2026 | MKSI | S 10b5-1 | 10,000 | $302.01 | $3,020,100 | 134,776 Direct | -6.91% | Disposed | -8.6% (price as of 2026-08-20) |
| May 22, 2026 | MKSI | S 10b5-1 | 10,000 | $315.48 | $3,154,800 | 144,696 Direct | -6.46% | Disposed | -12.5% (price as of 2026-08-20) |
| Feb. 20, 2026 | MKSI | S | 1,890 | $259.70 | $490,833 | 154,696 Direct | -1.21% | Disposed | 6.3% (price as of 2026-08-20) |
| Feb. 20, 2026 | MKSI | S | 1,988 | $257.81 | $512,526 | 156,586 Direct | -1.25% | Disposed | 7.1% (price as of 2026-08-20) |
| Feb. 20, 2026 | MKSI | S | 12,812 | $256.93 | $3,291,787 | 158,574 Direct | -7.48% | Disposed | 7.4% (price as of 2026-08-20) |
| Feb. 20, 2026 | MKSI | S | 13,310 | $256.05 | $3,408,026 | 171,386 Direct | -7.21% | Disposed | 7.8% (price as of 2026-08-20) |
Showing latest 100 of 392 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Feb. 21, 2026 | CGNX | Restricted Stock Unit | Common Stock (2,913) | — | Feb. 21, 2026 | 2,913 | Disposed |
| Feb. 18, 2026 | CGNX | Restricted Stock Unit | Common Stock (8,324) | — | Feb. 18, 2026 | 8,324 | Disposed |
| Feb. 17, 2026 | CGNX | Restricted Stock Unit | Common Stock (4,817) | — | Feb. 17, 2027 | 4,817 | Acquired |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (12,091) | — | — | 12,091 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (16,989) | — | — | 16,989 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (7,208) | — | — | 7,208 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (3,859) | — | — | 3,859 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (7,654) | — | — | 7,654 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (22,088) | — | — | 22,088 | Disposed |
| Feb. 17, 2026 | MKSI | Restricted Stock Unit | Common Stock (15,593) | — | — | 15,593 | Acquired |
| Feb. 8, 2026 | MKSI | Restricted Stock Unit | Common Stock (50,972) | — | — | 50,972 | Acquired |
| Oct. 31, 2025 | MKSI | Restricted Stock Unit | Common Stock (1,651) | — | — | 1,651 | Disposed |
| Oct. 31, 2025 | MKSI | Restricted Stock Unit | Common Stock (352) | — | — | 352 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (7,207) | — | — | 7,207 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (4,035) | — | — | 4,035 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (7,654) | — | — | 7,654 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (22,088) | — | — | 22,088 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (6,735) | — | — | 6,735 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (14,041) | — | — | 14,041 | Disposed |
| Feb. 18, 2025 | MKSI | Restricted Stock Unit | Common Stock (37,925) | — | — | 37,925 | Acquired |
| Feb. 10, 2025 | MKSI | Restricted Stock Unit | Common Stock (12,107) | — | — | 12,107 | Acquired |
| Dec. 6, 2024 | MKSI | Restricted Stock Unit | Common Stock (984) | — | — | 984 | Disposed |
| Dec. 6, 2024 | MKSI | Restricted Stock Unit | Common Stock (2,010) | — | — | 2,010 | Disposed |
| Feb. 21, 2024 | CGNX | Restricted Stock Unit | Common Stock (1,166) | $0.00 | Feb. 21, 2026 | 1,166 | Disposed |
| Feb. 20, 2024 | CGNX | Restricted Stock Unit | Common Stock (6,973) | — | Feb. 20, 2025 | 6,973 | Acquired |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (7,653) | — | — | 7,653 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (23,093) | — | — | 23,093 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (6,734) | — | — | 6,734 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (14,041) | — | — | 14,041 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (3,778) | — | — | 3,778 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (9,235) | — | — | 9,235 | Disposed |
| Feb. 15, 2024 | MKSI | Restricted Stock Unit | Common Stock (22,608) | — | — | 22,608 | Acquired |
| Feb. 5, 2024 | MKSI | Restricted Stock Unit | Common Stock (69,279) | — | — | 69,279 | Acquired |
| Dec. 1, 2023 | MKSI | Restricted Stock Unit | Common Stock (970) | — | — | 970 | Disposed |
| Dec. 1, 2023 | MKSI | Restricted Stock Unit | Common Stock (569) | — | — | 569 | Disposed |
| Dec. 1, 2023 | MKSI | Restricted Stock Unit | Common Stock (160) | — | — | 160 | Disposed |
| Dec. 1, 2023 | MKSI | Restricted Stock Unit | Common Stock (1,186) | — | — | 1,186 | Disposed |
| Dec. 1, 2023 | MKSI | Restricted Stock Unit | Common Stock (390) | — | — | 390 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (7,018) | — | — | 7,018 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (14,634) | — | — | 14,634 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (3,937) | — | — | 3,937 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (9,624) | — | — | 9,624 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (4,282) | — | — | 4,282 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (7,536) | — | — | 7,536 | Disposed |
| Feb. 15, 2023 | MKSI | Restricted Stock Unit | Common Stock (23,931) | — | — | 23,931 | Acquired |
| Feb. 8, 2023 | MKSI | Restricted Stock Unit | Common Stock (43,902) | — | — | 43,902 | Acquired |
| April 29, 2022 | MKSI | Restricted Stock Unit | Common Stock (21,056) | — | — | 21,056 | Acquired |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (3,937) | — | — | 3,937 | Disposed |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (9,624) | — | — | 9,624 | Disposed |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (4,281) | — | — | 4,281 | Disposed |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (7,535) | — | — | 7,535 | Disposed |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (2,755) | — | — | 2,755 | Disposed |
| Feb. 15, 2022 | MKSI | Restricted Stock Unit | Common Stock (3,066) | — | — | 3,066 | Disposed |
| Jan. 21, 2022 | MKSI | Restricted Stock Unit | Common Stock (28,873) | — | — | 28,873 | Acquired |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (4,281) | — | — | 4,281 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (7,534) | — | — | 7,534 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (2,755) | — | — | 2,755 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (3,066) | — | — | 3,066 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (258) | — | — | 258 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (263) | — | — | 263 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (1,951) | — | — | 1,951 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (1,990) | — | — | 1,990 | Disposed |
| Feb. 16, 2021 | MKSI | Restricted Stock Unit | Common Stock (11,812) | — | — | 11,812 | Acquired |
| Jan. 25, 2021 | MKSI | Restricted Stock Unit | Common Stock (22,605) | — | — | 22,605 | Acquired |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (12,844) | — | — | 12,844 | Acquired |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (2,979) | — | — | 2,979 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (2,463) | — | — | 2,463 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (1,989) | — | — | 1,989 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (1,950) | — | — | 1,950 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (262) | — | — | 262 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (257) | — | — | 257 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (3,066) | — | — | 3,066 | Disposed |
| Feb. 18, 2020 | MKSI | Restricted Stock Unit | Common Stock (2,755) | — | — | 2,755 | Disposed |
| Jan. 27, 2020 | MKSI | Restricted Stock Unit | Common Stock (9,197) | — | — | 9,197 | Acquired |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (257) | — | — | 257 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (262) | — | — | 262 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (1,950) | — | — | 1,950 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (1,989) | — | — | 1,989 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (2,462) | — | — | 2,462 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (2,979) | — | — | 2,979 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (4,014) | — | — | 4,014 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (5,218) | — | — | 5,218 | Disposed |
| Feb. 15, 2019 | MKSI | Restricted Stock Unit | Common Stock (8,264) | — | — | 8,264 | Acquired |
| Jan. 28, 2019 | MKSI | Restricted Stock Unit | Common Stock (370) | — | — | 370 | Disposed |
| Jan. 28, 2019 | MKSI | Restricted Stock Unit | Common Stock (2,808) | — | — | 2,808 | Disposed |
| May 9, 2018 | MKSI | Restricted Stock Unit | Common Stock (1,157) | — | — | 1,157 | Acquired |
| May 9, 2018 | MKSI | Restricted Stock Unit | Common Stock (772) | — | — | 772 | Acquired |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (3,074) | — | — | 3,074 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (5,218) | — | — | 5,218 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (4,014) | — | — | 4,014 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (2,978) | — | — | 2,978 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (2,461) | — | — | 2,461 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (3,780) | — | — | 3,780 | Disposed |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (5,851) | — | — | 5,851 | Acquired |
| Feb. 15, 2018 | MKSI | Restricted Stock Unit | Common Stock (8,776) | — | — | 8,776 | Acquired |
| Feb. 12, 2018 | MKSI | Restricted Stock Unit | Common Stock (2,142) | — | — | 2,142 | Disposed |
| May 11, 2017 | MKSI | Restricted Stock Unit | Common Stock (3,558) | — | — | 3,558 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock (4,013) | — | — | 4,013 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock (5,217) | — | — | 5,217 | Disposed |
| Feb. 15, 2017 | MKSI | Restricted Stock Unit | Common Stock (3,073) | — | — | 3,073 | Disposed |
Showing latest 100 of 183 transactions
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
MKSI
PEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2024 | $970,492 | — | — | — | $363,935 | — | $37,146 | $8,760,125 |
| 2023 | $950,000 | — | — | — | $1,021,250 | — | $35,288 | $7,906,628 |
| 2022 | $944,727 | — | — | — | $1,170,939 | — | $32,732 | $8,058,382 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.