MKS Inc
MKSI- Exchange
- Nasdaq
- Industry
- Industrial Instruments For Measurement, Display, and Control
- SEC CIK
- 0001049502
In the last 90 days, MKS Inc insiders filed 0 open-market purchases and 3 sales; 777 institutions reported holding it in 13F filings for Q2 2026, worth $31.3B in total; Maverick Capital is the only superinvestor holding it.
Holders of 5% or more of MKSI
Holders whose latest Schedule 13D or 13G filing reports 5% or more of MKS Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 8.80%5.89M shares | – | Nov 7, 20242 filings | Oct 17, 2025 | SEC |
| Invesco Ltd. | 13G | 6.50%4.39M shares | New | Feb 12, 20261 filing | Feb 12, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.49%3.70M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.24%3.53M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
43 Schedule 13D and 13G filings on MKS Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Sep 3, 202612:29 PM ET | JPMorgan Chase & Co | 13G/A | 2.90%2.01M shares | −2.10 ppfrom 5.00%Below 5% | Aug 31, 2026 | SEC |
| Jul 24, 20263:21 PM ET | Victory Capital Management Inc | 13G/A | 0.90%604.7K shares | −4.74 ppfrom 5.64%Below 5% | Jun 30, 2026 | SEC |
| Jul 16, 20264:07 PM ET | JPMorgan Chase & Co | 13G | 5.00%3.42M shares | New | Jun 30, 2026 | SEC |
| May 6, 202611:30 AM ET | FMR LLCand 1 other | 13G/A | 3.30%2.24M shares | –Below 5% | Mar 31, 2026 | SEC |
| Apr 30, 202611:43 AM ET | Vanguard Capital Management LLC | 13G | 5.24%3.53M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20262:08 PM ET | Vanguard Portfolio Management LLC | 13G | 5.49%3.70M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202610:49 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −11.54 ppfrom 11.54%Below 5% | Mar 13, 2026 | SEC |
| Feb 17, 202610:26 AM ET | Price T Rowe Associates Inc | 13G/A | 4.10%2.75M shares | −2.10 ppfrom 6.20%Below 5% | Dec 31, 2025 | SEC |
| Feb 12, 20264:01 PM ET | Invesco Ltd. | 13G | 6.50%4.39M shares | New | Dec 31, 2025 | SEC |
| Oct 31, 202511:05 AM ET | Vanguard Group Inc | 13G/A | 11.54%7.75M shares | – | Sep 30, 2025 | SEC |
| Oct 17, 20256:13 PM ET | BlackRock, Inc. | 13G/A | 8.80%5.89M shares | – | Sep 30, 2025 | SEC |
| Aug 14, 20251:07 PM ET | Price T Rowe Associates Inc | 13G/A | 6.20%4.13M shares | +1.20 ppfrom 5.00% | Jun 30, 2025 | SEC |
| Aug 8, 202512:29 PM ET | Victory Capital Management Inc | 13G/A | 5.64%3.79M shares | 0.00 ppfrom 5.64% | Jun 30, 2025 | SEC |
| Aug 8, 20259:53 AM ET | Victory Capital Management Inc | 13G | 5.64%3.79M shares | – | Jun 30, 2025 | SEC |
| Feb 14, 20259:44 AM ET | Price T Rowe Associates Inc | 13G/A | 5.00%3.34M shares | – | Dec 31, 2024 | SEC |
| Feb 7, 20257:38 PM ET | Capital International Investors | 13G/A | 4.70%3.16M shares | –Below 5% | Sep 30, 2024 | SEC |
| Nov 14, 2024 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Nov 7, 2024 | BlackRock, Inc. | 13G/AOld format | – | – | – | SEC |
| Sep 10, 2024 | Price T Rowe Associates Inc | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2024 | Carlyle Group Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | Capital International Investors | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | FMR LLC | 13GOld format | – | New | – | SEC |
| Feb 7, 2024 | Victory Capital Management Inc | 13G/AOld format | – | – | – | SEC |
| Jan 24, 20245:23 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 10, 2024 | Price T Rowe Associates Inc | 13GOld format | – | New | – | SEC |
| Jun 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Capital International Investors | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2023 | Capital International Investors | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 7, 20232:10 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 6, 2023 | Wellington Management Group LLP | 13G/AOld format | – | – | – | SEC |
| Feb 2, 2023 | Victory Capital Management Inc | 13GOld format | – | New | – | SEC |
| Aug 29, 2022 | Carlyle Group Inc. | 13GOld format | – | New | – | SEC |
| Feb 11, 2022 | Capital International Investors | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2022 | Wellington Management Group LLP | 13G/AOld format | – | – | – | SEC |
| Feb 1, 20225:14 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jun 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2021 | Capital International Investors | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 4, 2021 | Wellington Management Group LLP | 13G/AOld format | – | – | – | SEC |
| Jan 29, 20215:21 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
31 notices from officers, directors and other affiliates planning to sell MKS Inc shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Dec 10, 202411:56 AM ET | Moloney Jacqueline FDirector | 300 | $34.4K | Dec 10, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Dec 2, 202410:58 AM ET | Mora ElizabethDirector | 275 | $31.2K | Dec 2, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Sep 3, 20249:47 AM ET | Mora ElizabethDirector | 275 | $31.9K | Sep 3, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Aug 16, 20241:00 PM ET | Williams John EdwardOfficer | 1.80K | $213.7K | Aug 16, 2024 | Fidelity Brokerage Services LLC | SEC |
| Aug 1, 20242:56 PM ET | Moloney Jacqueline FDirector | 250 | $30.9K | Aug 1, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Jul 15, 20242:17 PM ET | Gitin Mark MiltonFormer officer | 11.6K | $1.65M | Jul 15, 2024 | Fidelity Brokerage Services LLC | SEC |
| Jun 3, 202412:33 PM ET | Mora ElizabethDirector | 275 | $35.6K | Jun 3, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Apr 1, 202410:16 AM ET | Mora ElizabethDirector | 250 | $33.3K | Apr 1, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Mar 1, 20242:40 PM ET | Moloney Jacqueline FDirector | 250 | $30.7K | Mar 1, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Mar 1, 202410:33 AM ET | Burke Kathleen FlahertyOfficer | 7.41K | $910.7K | Mar 1, 2024 | Fidelity Brokerage Services LLC | SEC |
| Feb 22, 20244:54 PM ET | Bagshaw Seth HOfficer | 32.9K | $4.05M | Feb 22, 2024 | Fidelity Brokerage Services LLC | SEC |
| Feb 16, 202411:53 AM ET | Moloney Jacqueline FDirector | 1.92K | $237.9K | Feb 16, 2024 | Fidelity Brokerage Services LLC | SEC |
| Feb 9, 20243:17 PM ET | Colella Gerard GDirector | 10.0K | $1.20M | Feb 9, 202410b5-1 | MERRILL LYNCH | SEC |
| Jan 22, 20243:55 PM ET | Colella Gerard GDirector | 10.0K | $1.10M | Jan 22, 202410b5-1 | Merrill Lynch | SEC |
| Jan 2, 202410:46 AM ET | Mora ElizabethDirector | 250 | $25.2K | Jan 2, 202410b5-1 | Fidelity Brokerage Services LLC | SEC |
| Dec 1, 202311:04 AM ET | Moloney Jacqueline FDirector | 250 | $20.6K | Dec 1, 202310b5-1 | Fidelity Brokerage Services LLC | SEC |
| Oct 2, 202310:47 AM ET | Mora ElizabethDirector | 250 | $21.8K | Oct 2, 202310b5-1 | Fidelity Brokerage Services LLC | SEC |
| Sep 6, 20235:08 PM ET | Bagshaw Seth HOfficer | 25.0K | $2.43M | Sep 6, 2023 | Fidelity Brokerage Services LLC | SEC |
| Aug 31, 202312:40 PM ET | Colella Gerard GDirector | 10.0K | $1.00M | Aug 31, 202310b5-1 | MERRILL LYNCH | SEC |
| Aug 28, 20235:28 PM ET | Moloney Jacqueline FDirector | 250 | $23.8K | Aug 28, 2023 | Fidelity Brokerage Services LLC | SEC |
| Aug 7, 20236:40 PM ET | Burke Kathleen FlahertyOfficer | 5.38K | $541.2K | Aug 7, 2023 | Fidelity Brokerage Services LLC | SEC |
| Aug 7, 202310:58 AM ET | Burke Kathleen FlahertyOfficer | 6.19K | $625.3K | Aug 7, 2023 | Fidelity Brokerage Services LLC | SEC |
| Jul 3, 202311:11 AM ET | Mora ElizabethDirector | 250 | $27.1K | Jul 3, 202310b5-1 | Fidelity Brokerage Services LLC | SEC |
| Jun 28, 20239:51 PM ET | Gamma Holding Company LimitedFormer 10% stockholder | 123.0K | $13.2M | Jun 28, 2023 | J.P. Morgan Securities LLC | SEC |
| Jun 28, 20239:50 PM ET | Carlyle Partners VI Cayman Holdings, L.P.Former 10% stockholder | 610.7K | $65.5M | Jun 28, 2023 | J.P. Morgan Securities LLC | SEC |
Showing the latest 25. See the MKSI notices from the last 12 months