Latest Period
Q2 2026
Security Snapshot
MKS INC - Common Stock (MKSI) Institutional Ownership
CUSIP: 55306N104
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
773
Shares (Excl. Options)
70,831,193
Price
$444.80
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- Security type / class
- Equity / Common Stock
- Symbol
- MKSI on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 70,831,193
- Total 13F value
- $31,318,749,030
- Portfolio coverage rank
- 0.03%
- Share change
- +1,961,679
- Value change
- +$1,065,600,833
- Number of holders
- 773
- Shares outstanding
- 67,187,778
- SEC-reported price per share
- $257.61
- Insider filing price
- $257.61
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- MKSI - MKS INC - Common Stock is tracked under CUSIP 55306N104.
- 773 institutions reported positions in Q2 2026.
- 9 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 620 to 773 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $15,779,590,651 to $31,318,749,030.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 773 institutions filings for Q2 2026.
Security key
55306N104
Latest holder period
Q2 2026
13F holders
773
13D/G owners
9
CIK / CUSIP context first
Open Q2 2026 holders
MKSI full holder history
MKS INC SEC filings
MKS INC company facts
MKS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 55306N104:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
9
Security
MKSI
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 8.8% | $728,716,050 | 5,887,663 | BlackRock, Inc. | 30 Sep 2025 | |||
| Invesco Ltd. | 6.5% | $806,336,618 | 4,394,205 | Invesco Ltd. | 31 Dec 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | $850,311,248 | 3,700,062 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $810,961,801 | 3,528,836 | Vanguard Capital Management | 31 Mar 2026 | |||
| JPMORGAN CHASE & CO | 5% | $1,520,141,808 | 3,417,585 | JPMORGAN CHASE & CO | 30 Jun 2026 | |||
| Capital International Investors | 4.7% | $225,778,190 | 3,160,389 | Capital International Investors | 30 Sep 2024 | |||
| PRICE T ROWE ASSOCIATES INC /MD/ | 4.1% | -35% | $505,335,328 | -$252,359,660 | 2,753,871 | -33% | T. Rowe Price Associates, Inc. | 31 Dec 2025 |
| FMR LLC | 3.3% | $613,012,951 | 2,243,989 | FMR LLC | 31 Mar 2026 | |||
| VICTORY CAPITAL MANAGEMENT INC | 0.9% | -79% | $268,966,112 | -$1,415,580,893 | 604,690 | -84% | Victory Capital Management, Inc. | 30 Jun 2026 |
As of 30 Jun 2026, 773 institutional investors reported holding 70,831,193 shares of MKS INC - Common Stock (MKSI). This represents 105% of the company’s total 67,187,778 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
70%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10% | 6,930,030 | +4.3% | 0.05% | $3,082,477,430 |
| Invesco Ltd. | 6.9% | 4,661,664 | +25% | 0.16% | $2,073,508,050 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | 3,707,327 | +0.59% | 0.07% | $1,649,019,050 |
| JPMORGAN CHASE & CO | 5% | 3,373,844 | +61% | 0.08% | $1,404,811,557 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 3,049,560 | +1.2% | 0.03% | $1,356,444,288 |
| STATE STREET CORP | 3.2% | 2,134,663 | +3.7% | 0.03% | $949,439,264 |
| Point72 Asset Management, L.P. | 3% | 1,996,843 | +24% | 1.4% | $888,195,766 |
| Capital International Investors | 2.9% | 1,915,187 | -2.7% | 0.18% | $851,875,178 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2.8% | 1,889,901 | +11% | 0.08% | $840,629,000 |
| Aspex Management (HK) Ltd | 2.7% | 1,820,441 | +18% | 9.1% | $809,732,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 1,539,072 | -0.02% | 0.04% | $686,574,757 |
| FMR LLC | 2.2% | 1,499,498 | -22% | 0.03% | $666,976,512 |
| WELLINGTON MANAGEMENT GROUP LLP | 2.1% | 1,416,034 | -23% | 0.11% | $629,851,923 |
| Capital World Investors | 2% | 1,366,290 | +7% | 0.07% | $607,725,792 |
| Whale Rock Capital Management LLC | 1.9% | 1,271,373 | -2.7% | 4.5% | $565,506,710 |
| NEUBERGER BERMAN GROUP LLC | 1.7% | 1,165,068 | -19% | 0.35% | $518,222,089 |
| ALKEON CAPITAL MANAGEMENT LLC | 1.6% | 1,072,040 | 1.8% | $476,843,392 | |
| NORGES BANK | 1.4% | 954,667 | 0.04% | $424,635,882 | |
| WESTFIELD CAPITAL MANAGEMENT CO LP | 1.4% | 928,617 | -11% | 1.3% | $413,048,645 |
| Sachem Head Capital Management LP | 1.2% | 812,700 | 7.5% | $361,488,960 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2% | 808,198 | -6.7% | 0.05% | $359,486,470 |
| CITADEL ADVISORS LLC | 1% | 697,670 | -26% | 0.18% | $310,323,616 |
| MORGAN STANLEY | 1% | 681,576 | +32% | 0.02% | $303,166,053 |
| Bank of New York Mellon Corp | 0.98% | 658,544 | -21% | 0.05% | $292,920,852 |
| MILLENNIUM MANAGEMENT LLC | 0.96% | 645,071 | -28% | 0.19% | $286,927,581 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 70,831,193 | $31,318,749,030 | +$1,065,600,833 | $444.80 | 773 |
| 2026 Q1 | 68,988,404 | $15,779,590,651 | -$189,039,485 | $229.81 | 620 |
| 2025 Q4 | 70,547,926 | $11,279,268,865 | -$278,053,181 | $159.80 | 514 |
| 2025 Q3 | 72,009,390 | $8,912,346,556 | -$247,110,462 | $123.77 | 432 |
| 2025 Q2 | 74,656,256 | $7,417,760,692 | +$501,510,755 | $99.36 | 391 |
| 2025 Q1 | 70,604,374 | $5,654,976,915 | +$15,984,881 | $80.15 | 390 |
| 2024 Q4 | 70,469,090 | $7,360,920,393 | +$163,297,205 | $104.39 | 416 |
| 2024 Q3 | 67,801,071 | $7,370,645,916 | -$175,427,802 | $108.71 | 405 |
| 2024 Q2 | 69,059,487 | $9,023,696,771 | +$20,371,519 | $130.58 | 393 |
| 2024 Q1 | 68,945,423 | $9,157,146,718 | +$298,920,133 | $133.00 | 336 |
| 2023 Q4 | 66,915,706 | $6,883,792,520 | +$74,542,820 | $102.87 | 322 |
| 2023 Q3 | 67,016,612 | $5,797,022,331 | -$98,537,748 | $86.54 | 320 |
| 2023 Q2 | 67,793,825 | $7,320,534,717 | +$83,578,503 | $108.10 | 318 |
| 2023 Q1 | 67,091,933 | $5,943,332,893 | -$31,005,207 | $88.62 | 320 |
| 2022 Q4 | 67,488,362 | $5,740,811,738 | +$777,783,941 | $84.73 | 310 |
| 2022 Q3 | 58,488,300 | $4,841,875,867 | +$414,649,121 | $82.64 | 340 |
| 2022 Q2 | 53,123,303 | $5,449,916,038 | -$71,616,252 | $102.63 | 361 |
| 2022 Q1 | 53,950,167 | $8,057,424,746 | +$9,162,472 | $150.00 | 383 |
| 2021 Q4 | 53,647,275 | $9,337,726,302 | +$135,642,019 | $174.17 | 399 |
| 2021 Q3 | 52,553,176 | $7,929,920,269 | +$42,671,310 | $150.91 | 365 |
| 2021 Q2 | 52,084,245 | $9,266,889,055 | -$156,963,648 | $177.95 | 366 |
| 2021 Q1 | 53,005,490 | $9,827,292,725 | +$175,330,067 | $185.42 | 345 |
| 2020 Q4 | 52,082,426 | $7,837,018,243 | +$71,934,035 | $150.45 | 339 |
| 2020 Q3 | 51,806,716 | $5,662,007,337 | -$106,289,181 | $109.23 | 327 |
| 2020 Q2 | 52,725,910 | $5,972,142,259 | -$137,548,110 | $113.24 | 309 |