MKS
Combines vacuum control, photonics, lasers, and surface chemistry for advanced manufacturing.
$256.50
After-hours close+0.79 (+0.31%)
At close$255.71(−5.64%)
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Breakdown13F · Form 4
Institutions 157.38%Insiders 0.50%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 67.54M · Float 67.14M · 99.4% free float
Institutions13F, as of Jun 30, 2026
805 holders · 106.30M shares · 213 new positions · 461 increased · 250 reduced · 60 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 6.93M | 10.26% | +288.3K | Aug 7, 2026 |
| Invesco Ltd. | 4.66M | 6.90% | +940.2K | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 3.71M | 5.49% | +21.8K | Aug 13, 2026 |
| JPMorgan Chase & Co | 3.37M | 5.00% | +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 | 2.96% | +386.5K | Aug 14, 2026 |
| Capital International Investors | 1.92M | 2.84% | −53.6K | Aug 12, 2026 |
Beneficial owners13D/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 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| John Tseng-Chung Lee | director, officer: President & CEO | 134.8K | 0.20% | Aug 17, 2026 |
| Kathleen Flaherty Burke | officer: EVP, GC & Secretary | 49.4K | 0.07% | May 12, 2026 |
| Gerald G. Colella | director | 29.0K | 0.04% | May 28, 2026 |
| James Alan Schreiner | officer: EVP & COO | 19.2K | 0.03% | Jun 16, 2026 |
| Elizabeth Mora | director | 19.1K | 0.03% | Jun 2, 2026 |
| Raj Batra | director | 16.2K | 0.02% | May 12, 2026 |
| Eric Robert Taranto | officer: EVP & GM, VSD | 12.6K | 0.02% | May 12, 2026 |
| David Philip Henry | officer: EVP, Global Str Mktg & GM, MSD | 10.4K | 0.02% | Jun 2, 2026 |
| Joseph B. Donahue | director | 10.0K | 0.01% | May 28, 2026 |
| Renee Martel Donlan | officer: EVP, GC & CCO | 9.5K | 0.01% | Jun 4, 2026 |
4 ten-percent owners hold 16.73M shares by Form 4, outside the officers-and-directors figure above · 23 people have not refiled in the last 18 months (362.4K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| 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 |
| May 26, 2026 | David Philip Henryofficer: EVP, Global Str Mktg & GM, MSD | Sale | 2,500 | $330.50 | 16,341 |
CongressHouse and Senate disclosures
Not reported.