Fourier Capital Management Ltd reported MKS INC. (MKSI) in 4 quarterly 13F filings from 2025 Q4 through 2026 Q3. Peak portfolio weight reached 23.63% in 2026 Q3. The latest visible filing shows MKSI at 23.63% of the fund.
This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.
This page is designed to answer the real investor question behind a 13F filing: how meaningful was Fourier Capital Management Ltd's position in MKS INC., and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.
MKSI was reported at 23.63% of portfolio in the most recent visible filing.
Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.
Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.
Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.
These are the practical questions this page is built to answer before you even open the full history table.
Fourier Capital Management Ltd reported MKSI across 4 quarterly 13F filings, from 2025 Q4 through 2026 Q3.
The largest reported portfolio weight for MKSI was 23.63% in 2026 Q3.
The most recent filing on this page is 2026 Q3, when Fourier Capital Management Ltd reported 62,986 shares, equal to 23.63% of portfolio, with an estimated market value of $16.7M.
The chart compares Fourier Capital Management Ltd's quarterly MKSI portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.
Based on 13F filing dates vs. subsequent MKSI price moves, Fourier Capital Management Ltd correctly timed 2 out of 3 reported position changes (67%). The annualised alpha on MKSI relative to SPY over the holding period was +7135.1%.