MKS (MKSI)
Combines vacuum control, photonics, lasers, and surface chemistry for advanced manufacturing.
$260.02
vs last close−0.35 (−0.13%)
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13F · 13D/G · Form 4
| Institutions | ≈ 99.51% | 67.29M shares | |
|---|---|---|---|
| 808 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 0.50% | 336.0K shares | |
| 16 holders · as of Sep 2, 2026 | |||
| Adds to | 100.01% | ||
67.62M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 100.01%; nothing is left for Other.
13F, as of Jun 30, 2026
808 holders · 67.29M shares · 215 new positions · 463 increased · 251 reduced · 59 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 6.93M | 10.25% | +288.3K | Aug 7, 2026 |
| Invesco Ltd. | 4.66M | 6.89% | +940.2K | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 3.71M | 5.48% | +21.8K | Aug 13, 2026 |
| JPMorgan Chase & Co | 3.37M | 4.99% | +1.28M | Aug 12, 2026 |
| Vanguard Capital Management LLC | 3.05M | 4.51% | +35.4K | Aug 13, 2026 |
| State Street Corp | 2.13M | 3.16% | +76.9K | Aug 7, 2026 |
| Point72 Asset Management, L.P. | 2.00M | 2.95% | +386.5K | Aug 14, 2026 |
| Capital International Investors | 1.92M | 2.83% | −53.6K | Aug 12, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 8.80% | 5.89M | 13G | Oct 17, 2025 |
| Invesco Ltd. | 6.50% | 4.39M | 13G | Feb 12, 2026 |
| Victory Capital Management, Inc. | 5.64% | 3.79M | 13G | Aug 8, 2025 |
| Vanguard Portfolio Management | 5.49% | 3.70M | 13G | Apr 29, 2026 |
| Vanguard Capital Management | 5.24% | 3.53M | 13G | Apr 30, 2026 |
| JPMorgan Chase & Co | 5.00% | 3.42M | 13G | Jul 16, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 1, 2026 | Elizabeth Moradirector | Sale | 300 | $250.96 | 18,845 |
| Aug 14, 2026 | John Tseng-Chung Leedirector, officer: President & CEO | Sale | 10,000 | $302.01 | 134,776 |
| Aug 3, 2026 | John Edward Williamsofficer: EVP & GM, PSD | Sale | 457 | $288.31 | 4,098 |
| Jun 12, 2026 | James Alan Schreinerofficer: EVP & COO | Sale · 3 lots | 3,500 | $345.82 | 19,201 |
| Jun 10, 2026 | James Alan Schreinerofficer: EVP & COO | Sale | 781 | $317.42 | 22,701 |
| Jun 5, 2026 | Michelle M. McCarthyofficer: SVP & Chief Accounting Officer | Sale | 2,434 | $315.23 | 2 |
| Jun 1, 2026 | Elizabeth Moradirector | Sale | 300 | $318.02 | 19,145 |
| Jun 1, 2026 | David Philip Henryofficer: EVP, Global Str Mktg & GM, MSD | Sale | 6,000 | $314.43 | 10,422 |
| May 27, 2026 | Gerald G. Colelladirector | Sale · 7 lots | 20,000 | $333.40 | 20,017 |
| May 27, 2026 | Joseph B. Donahuedirector | Sale | 2,100 | $327.95 | 10,033 |
House and Senate disclosures
Not reported.