Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MKSI held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 6.6M | $1.53B | +8.2% | 9.866% | 0.03% |
| 2 | Invesco Ltd. | 3.7M | $855.2M | -3.5% | 5.528% | 0.13% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.7M | $847.0M | — | 5.474% | 0.04% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.0M | $692.7M | — | 4.477% | 0.02% |
| 5 | STATE STREET CORP | 2.1M | $472.9M | +2.0% | 3.057% | 0.02% |
| 6 | Capital International Investors | 2.0M | $452.4M | -39.2% | 2.924% | 0.11% |
| 7 | FMR LLC | 1.9M | $444.4M | -39.5% | 2.873% | 0.02% |
| 8 | WELLINGTON MANAGEMENT GROUP LLP | 1.8M | $421.3M | -28.2% | 2.723% | 0.08% |
| 9 | Point72 Asset Management, L.P. | 1.6M | $370.3M | +157.5% | 2.394% | 0.52% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1.5M | $353.8M | +22.8% | 2.287% | 0.02% |
| 11 | Neuberger Berman Group LLC | 1.4M | $329.4M | -1.9% | 2.129% | 0.25% |
| 12 | UBS Group AG | 1.3M | $307.8M | +8.8% | 1.990% | 0.05% |
| 13 | Whale Rock Capital Management LLC | 1.3M | $300.3M | — | 1.941% | 3.88% |
| 14 | Capital World Investors | 1.3M | $293.5M | — | 1.897% | 0.04% |
| 15 | WESTFIELD CAPITAL MANAGEMENT CO LP | 1.0M | $240.6M | +24.6% | 1.555% | 1.01% |
| 16 | CITADEL ADVISORS LLC | 1.0M | $237.6M | +89.2% | 1.536% | 0.11% |
| 17 | MILLENNIUM MANAGEMENT LLC | 894K | $205.5M | +9.4% | 1.329% | 0.14% |
| 18 | VICTORY CAPITAL MANAGEMENT INC | 879K | $201.9M | -65.7% | 1.305% | 0.13% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 867K | $199.2M | -0.5% | 1.287% | 0.03% |
| 20 | DIMENSIONAL FUND ADVISORS LP | 835K | $191.9M | -25.3% | 1.241% | 0.04% |
| 21 | Bank of New York Mellon Corp | 832K | $191.2M | +5.5% | 1.236% | 0.04% |
| 22 | PRINCIPAL FINANCIAL GROUP INC | 614K | $141.2M | -19.8% | 0.912% | 0.08% |
| 23 | AQR CAPITAL MANAGEMENT LLC | 616K | $136.9M | +213.5% | 0.916% | 0.06% |
| 24 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 574K | $132.0M | +107.8% | 0.853% | 0.01% |
| 25 | NORTHERN TRUST CORP | 569K | $130.8M | +0.6% | 0.846% | 0.02% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MKSI — a direct measure of their conviction.
Filings activity in MKSI during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 607 | +20% | 60.34% | +15.32 pp | $14.45B | +34% |
| Q4 2025 | 505 | +21% | 45.02% | +10.24 pp | $10.78B | +29% |
| Q3 2025 | 418 | +8.0% | 34.78% | +5.80 pp | $8.33B | +20% |
| Q2 2025 | 387 | +0.3% | 28.98% | 16.06 pp | $6.94B | 36% |
| Q1 2025 | 386 | 5.6% | 45.04% | +13.79 pp | $10.79B | +44% |
| Q4 2024 | 409 | +3.0% | 31.25% | +4.03 pp | $7.48B | +15% |
| Q3 2024 | 397 | +1.5% | 27.22% | 6.36 pp | $6.52B | 19% |
| Q2 2024 | 391 | — | 33.58% | — | $8.04B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MKSI stock.
Based on Q1 2026 13F filings, institutional ownership of MKS Inc. stands at 60.3%, held across 607 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of MKSI, with approximately 6,641,730 shares worth $1.53B as of Q1 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of MKSI, including Point72 Asset Management, L.P., CITADEL ADVISORS LLC, MILLENNIUM MANAGEMENT LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for MKSI is 86 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
165 institutions opened new positions in MKSI during Q1 2026, while 63 fully exited. 365 added to existing positions and 76 trimmed.
MKSI institutional ownership rose by 15.32 percentage points quarter-over-quarter, with a net change of +102 holders.
The top 10 institutions account for 44.5% of all reported 13F value in MKSI, and the top 25 account for 67.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
MKS Inc. (MKSI) Institutional Ownership