The Vanguard Group 13D and 13G filings for MKS Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2025-10-31 11:05 am Purchase | 2025-09-30 | 13G | MKS Inc. MKSI | The Vanguard Group | 7,752,097 11.540% | 859,156 (+12.46%) | Filing |
| 2024-02-13 5:09 pm Purchase | 2023-12-29 | 13G | MKS Inc. MKSI | The Vanguard Group | 6,892,941 10.310% | 197,494 (+2.95%) | Filing |
| 2023-06-09 2:15 pm Purchase | 2023-05-31 | 13G | MKS Inc. MKSI | The Vanguard Group | 6,695,447 10.030% | 351,049 (+5.53%) | Filing |
| 2023-02-09 11:27 am Purchase | 2022-12-30 | 13G | MKS Inc. MKSI | The Vanguard Group | 6,344,398 9.540% | 700,997 (+12.42%) | Filing |
| 2022-02-10 08:27 am Purchase | 2021-12-31 | 13G | MKS Inc. MKSI | The Vanguard Group | 5,643,401 10.180% | 42,873 (+0.77%) | Filing |
| 2021-06-10 10:06 am Purchase | 2021-05-28 | 13G | MKS Inc. MKSI | The Vanguard Group | 5,600,528 10.120% | 511,873 (+10.06%) | Filing |
| 2021-02-10 11:28 am Purchase | 2020-12-31 | 13G | MKS Inc. MKSI | The Vanguard Group | 5,088,655 9.230% | 8,452 (+0.17%) | Filing |