Mks Inc
A maker of the vacuum gauges, lasers, and specialty chemicals that help produce computer chips, circuit boards, and other high-tech goods, MKS supplies the tools factories rely on to build modern electronics. It was founded in 1961 in a Massachusetts garage after Sidney Siegel built a device to measure low-pressure gases, and its name comes from the Meter-Kilogram-Second system of measurement. That first gadget, the Baratron manometer, became essential to making microprocessors — a fitting start for a company still helping power the digital world.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.