Congress WatchMKSI stock trades by members of Congress
MKS Instruments, Inc. - Common Stock: 3 members of Congress disclosed 8 transactions between 2019-04-15 and 2025-11-21, 3 purchases and 5 sales.
Activity by year
Transactions by the year the report was filed.
MKSI price and Congress trades
Daily closing price (split-adjusted). Dots mark days members of Congress filed trades in MKSI: green when more were purchases, red when more were sales. Use + and − (or Ctrl/⌘ + scroll) to zoom and drag to pan. Hover a month in the heatmap below to highlight it here, or click it to zoom to that month.
Congress buying and selling by month
Purchases and sales of MKSI reported by members of the House and Senate.
Green months had more purchases, red months more sales, teal an even split; darker means more trades. Months are by filing date. Senate filings after August 2026 and scanned House filings are not fully covered, so early years can look quieter than they were.
Who traded MKSI
| Politician | Trades | Buys | Sales | Last filing |
|---|---|---|---|---|
| Lisa McClain | 4 | 2 | 2 | 2025-11-21 |
| Thomas H Tuberville | 3 | 1 | 2 | 2023-05-12 |
| Nicholas Van Taylor | 1 | 0 | 1 | 2019-04-15 |
Disclosed transactions
Download all transactions as CSV
| Filed | Traded | Politician | Type | Amount | Filing |
|---|---|---|---|---|---|
| 2025-11-21 | 2025-10-31 | Lisa McClain | Sale | $1,001 - $15,000 | Source |
| 2025-11-21 | 2025-10-30 | Lisa McClain | Sale | $1,001 - $15,000 | Source |
| 2025-11-21 | 2025-10-30 | Lisa McClain | Buy | $1,001 - $15,000 | Source |
| 2025-09-12 | 2025-08-04 | Lisa McClain | Buy | $1,001 - $15,000 | Source |
| 2023-05-12 | 2023-04-03 | Thomas H Tuberville | Sale | $1,001 - $15,000 | Source |
| 2023-05-11 | 2023-04-03 | Thomas H Tuberville | Sale | $1,001 - $15,000 | Source |
| 2022-04-08 | 2022-03-30 | Thomas H Tuberville | Buy | $1,001 - $15,000 | Source |
| 2019-04-15 | 2019-03-25 | Nicholas Van Taylor | Sale | $1,001 - $15,000 g | Source |
Stocks traded by the same politicians
- AAPL Apple Inc. - Common Stock, 3 shared
- ABBV AbbVie Inc. Common Stock, 3 shared
- ACN Accenture plc Class A Ordinary Shares, 3 shared
- ADBE Adobe Inc. - Common Stock, 3 shared
- ADP Automatic Data Processing, Inc. -..., 3 shared
- ALGN Align Technology, Inc. - Common Stock, 3 shared
- BABA Alibaba Group Holding Limited..., 3 shared
- BRK.B Berkshire Hathaway Inc. New Common Stock, 3 shared
- CSCO Cisco Systems, Inc. - Common Stock, 3 shared
- CVX Chevron Corporation Common Stock, 3 shared
Common questions
- Are members of Congress buying or selling MKSI?
- 3 members of Congress disclosed 8 transactions in MKS Instruments, Inc. - Common Stock (MKSI) between 2019-04-15 and 2025-11-21: 3 purchases and 5 sales.
- How active was Congress in MKSI recently?
- In 2025 filings, 4 transactions in MKSI were disclosed: 2 purchases and 2 sales.
- Which members of Congress trade MKSI?
- The most active in MKSI are Lisa McClain (4), Thomas H Tuberville (3) and Nicholas Van Taylor (1), by number of disclosed transactions. 3 members in all have traded it.