MKSI MKS INC: institutional ownership and insider trading
796 funds reported holding $35.2B of MKS INC in their latest 13F filings; in Q2 2026 funds net bought $2.25B, with 206 new positions and 52 funds selling out; over the last 12 months insiders bought $0 and sold $43.4M on the open market.
Famous investors holding MKSI
- Larry Robbins (Glenview Capital): $43.8M, 0.8% of the portfolio
- Izzy Englander (Millennium Management): $287M, 0.1% of the portfolio
- Two Sigma (Two Sigma Investments): $65.3M, 0.1% of the portfolio
- Ray Dalio (Bridgewater Associates): $12.1M, 0.1% of the portfolio
- Ken Griffin (Citadel Advisors): $378M, 0.0% of the portfolio
- Renaissance Technologies (Renaissance Technologies): $18.0M, 0.0% of the portfolio
- Lee Ainslie (Maverick Capital): $912K, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $2.64M, 0.0% of the portfolio
Largest institutional holders of MKSI
- BlackRock, Inc. (BLK) — $3.08B
- Invesco Ltd. (IVZ) — $2.07B
- VANGUARD PORTFOLIO MANAGEMENT LLC — $1.65B
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $1.40B
- VANGUARD CAPITAL MANAGEMENT LLC — $1.36B
- VANGUARD GROUP INC — $1.20B
- STATE STREET CORP (STT, STT-PG) — $949M
- Point72 Asset Management, L.P. — $890M
- Capital International Investors — $852M
- PRICE T ROWE ASSOCIATES INC /MD/ — $841M
Recent MKSI insider trades
- Sep 1, 2026: Mora Elizabeth sold 300 shares ($75.3K)
- Aug 14, 2026: Lee John Tseng-Chung sold 10,000 shares ($3.02M)
- Aug 3, 2026: Williams John Edward sold 457 shares ($132K)
- Jun 12, 2026: Schreiner James Alan sold 3,500 shares ($1.21M)
Members of Congress trading MKSI
- Oct 31, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain bought $1.00K–$15.0K
- Oct 30, 2025: Lisa C. McClain sold $1.00K–$15.0K
- Aug 4, 2025: Lisa C. McClain bought $1.00K–$15.0K
5%+ owners
- Vanguard Portfolio Management: 5.5% (Schedule 13G, filed Apr 29, 2026)
- Vanguard Capital Management: 5.2% (Schedule 13G, filed Apr 30, 2026)
- JPMORGAN CHASE & CO: 5.0% (Schedule 13G, filed Jul 16, 2026)