MKSI · Mks Inc · Shareholders & Ownership
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Every disclosed holder of MKSI in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns MKSI
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 72,187,200 | 106.75% |
| Insiders (Forms 3, 4, 5) | 335,960 | 0.50% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 4,902,685 | -7.25% |
| Registered funds (N-PORT, not summed) | 33,161,498 | 49.04% |
Shares outstanding: 67,620,475, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of MKSI
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,930,030 | ||
| 1.1 |
iShares Core S&P Mid-Cap ETF
Fund
S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
2,311,488 | ||
| 1.2 |
iShares S&P Mid-Cap 400 Growth ETF
Fund
S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
286,932 | ||
| 1.3 |
iShares Russell Mid-Cap ETF
Fund
S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
275,451 | ||
| 1.4 |
BlackRock Mid-Cap Growth Equity Portfolio
Fund
S000001505 · Registered fund · Aug 31, 2026
BlackRock Funds, not summed
|
195,633 | ||
| 1.5 |
iShares A.I. Innovation and Tech Active ETF
Fund
S000086268 · Registered fund · Jul 31, 2026
BlackRock ETF Trust, not summed
|
168,094 | ||
| 2 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,661,664 | ||
| 2.1 |
Invesco Small Cap Value Fund
Fund
S000027837 · Registered fund · Jul 31, 2026
AIM Sector Funds (Invesco Sector Funds), not summed
|
1,146,556 | ||
| 2.2 |
Invesco Value Opportunities Fund
Fund
S000027840 · Registered fund · Jul 31, 2026
AIM Sector Funds (Invesco Sector Funds), not summed
|
882,467 | ||
| 2.3 |
Invesco S&P MidCap Momentum ETF
Fund
S000003056 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
524,639 | ||
| 2.4 |
Invesco Discovery Mid Cap Growth Fund
Fund
S000064710 · Registered fund · Jul 31, 2026
AIM Investment Funds (Invesco Investment Funds), not summed
|
238,497 | ||
| 2.5 |
Invesco Semiconductors ETF
Fund
S000003032 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
227,663 | ||
| 3 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,707,327 | ||
| 4 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,049,560 | ||
| 5 |
SMALLCAP World Fund Inc
Fund
S000009599 · Registered fund · Jun 30, 2026
SMALLCAP World Fund Inc, not summed
|
2,453,957 | ||
| 6 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
2,143,925 | ||
| 7 |
|
2,134,663 | ||
| 7.1 |
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund
S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
341,899 | ||
| 7.2 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund
S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
74,340 | ||
| 7.3 |
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Value ETF
Fund
S000006988 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
30,100 | ||
| 7.4 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
23,423 | ||
| 7.5 |
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund
S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
11,014 | ||
| 8 |
JPMORGAN CHASE & CO
13G
CIK 19617 · Bank · Aug 31, 2026
Rule 13d-1(b), qualified institution, not summed
|
2,005,756 | ||
| 8.1 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,373,844 | ||
| 9 |
Point72 Asset Management, L.P.
13F
CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,996,843 | ||
| 10 |
Capital International Investors
13F
CIK 1562230 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,915,187 | ||
| 11 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,889,901 | ||
| 11.1 |
T. Rowe Price Mid-Cap Value Fund, Inc.
Fund
S000002103 · Registered fund · Jun 30, 2026
T. ROWE PRICE MID-CAP VALUE FUND, INC., not summed
|
486,420 | ||
| 11.2 |
T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund
Fund
S000002074 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
|
135,518 | ||
| 11.3 |
T. Rowe Price Small-Mid Cap ETF
Fund
S000079837 · Registered fund · Jun 30, 2026
T. Rowe Price Exchange-Traded Funds, Inc., not summed
|
68,657 | ||
| 11.4 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
49,267 | ||
| 11.5 |
T. Rowe Price Science & Technology Fund, Inc.
Fund
S000002119 · Registered fund · Jun 30, 2026
T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC., not summed
|
46,800 | ||
| 12 |
Aspex Management (HK) Ltd
13F
CIK 1768375 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,820,441 | ||
| 13 |
VANGUARD SMALL-CAP INDEX FUND
Fund
S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,548,875 | ||
| 14 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Sep 30, 2026
|
1,544,921 | ||
| 15 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,499,498 | ||
| 15.1 |
VIP Mid Cap Portfolio
Fund
S000007734 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund III, not summed
|
384,500 | ||
| 15.2 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · Aug 31, 2026
Fidelity Concord Street Trust, not summed
|
327,842 | ||
| 15.3 |
Fidelity Mid Cap Index Fund
Fund
S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
254,150 | ||
| 15.4 |
Fidelity Leveraged Company Stock Fund
Fund
S000007200 · Registered fund · Jul 31, 2026
Fidelity Securities Fund, not summed
|
220,400 | ||
| 15.5 |
Fidelity Capital and Income Fund
Fund
S000007495 · Registered fund · Jul 31, 2026
Fidelity Summer Street Trust, not summed
|
155,900 | ||
| 16 |
WELLINGTON MANAGEMENT GROUP LLP
13F
CIK 902219 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,416,034 | ||
| 17 |
Capital World Investors
13F
CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,366,290 | ||
| 18 |
Whale Rock Capital Management LLC
13F
CIK 1387322 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,271,373 | ||
| 19 |
NEUBERGER BERMAN GROUP LLC
13F
CIK 1465109 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,165,068 | ||
| 19.1 |
Neuberger Genesis Fund
Fund
S000007841 · Registered fund · Aug 31, 2026
NEUBERGER BERMAN EQUITY FUNDS, not summed
|
269,374 | ||
| 19.2 |
Neuberger Small-Mid Cap ETF
Fund
S000084236 · Registered fund · Aug 31, 2026
Neuberger Berman ETF Trust, not summed
|
7,168 | ||
| 20 |
ALKEON CAPITAL MANAGEMENT LLC
13F
CIK 1230239 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,072,040 | ||
| 21 |
NORGES BANK
13F
CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
954,667 | ||
| 22 |
WESTFIELD CAPITAL MANAGEMENT CO LP
13F
CIK 1177719 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
928,617 | ||
| 23 |
Sachem Head Capital Management LP
13F
CIK 1582090 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
812,700 | ||
| 24 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
808,198 | ||
| 24.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
321,165 | ||
| 24.2 |
Schwab U.S. Mid-Cap ETF
Fund
S000026635 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
186,836 | ||
| 24.3 |
Schwab Fundamental U.S. Small Company ETF
Fund
S000040878 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
114,468 | ||
| 24.4 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
40,922 | ||
| 24.5 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · Aug 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
40,584 | ||
| 25 |
JPMorgan Large Cap Growth Fund
Fund
S000003856 · Registered fund · Jun 30, 2026
JPMorgan Trust II, not summed
|
800,077 | ||
| 26 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Sep 30, 2026
|
790,715 | ||
| 26.1 |
BNY Mellon US Mid Cap Core Equity ETF
Fund
S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
|
10,088 | ||
| 27 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
774,625 | ||
| 28 |
FengHe Fund Management Pte. Ltd.
13F
CIK 1660531 · Exempt reporting adviser · Sep 30, 2026
|
771,263 | ||
| 29 |
VANGUARD INFORMATION TECHNOLOGY INDEX FUND
Fund
S000004452 · Registered fund · Aug 31, 2026
VANGUARD WORLD FUND, not summed
|
699,736 | ||
| 30 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
697,670 | ||
| 31 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
681,576 | ||
| 31.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
110 | ||
| 32 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
645,071 | ||
| 33 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
638,333 | ||
| 33.1 |
AQR Style Premia Alternative Fund
Fund
S000042050 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
26,716 | ||
| 33.2 |
AQR Equity Market Neutral Fund
Fund
S000046740 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
22,180 | ||
| 33.3 |
AQR Long-Short Equity Fund
Fund
S000041116 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
20,020 | ||
| 33.4 |
AQR Large Cap Momentum Style Fund
Fund
S000025643 · Registered fund · Mar 31, 2026
AQR Funds, not summed
|
7,851 | ||
| 33.5 |
AQR Large Cap Multi-Style Fund
Fund
S000040063 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
7,851 | ||
| 34 |
VICTORY CAPITAL MANAGEMENT INC
13F
CIK 1040188 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
609,027 | ||
| 34.1 |
VICTORY CAPITAL MANAGEMENT INC
13G
CIK 1040188 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
604,690 | ||
| 34.2 |
Victory Sycamore Established Value Fund
Fund
S000000788 · Registered fund · Jun 30, 2026
Victory Portfolios, not summed
|
340,000 | ||
| 34.3 |
Victory 500 Index Fund
Fund
S000012915 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
|
15,264 | ||
| 34.4 |
Victory Integrity Mid-Cap Value Fund
Fund
S000046397 · Registered fund · Jun 30, 2026
Victory Portfolios, not summed
|
11,264 | ||
| 34.5 |
Victory Integrity Small/Mid-Cap Value Fund
Fund
S000046398 · Registered fund · Jun 30, 2026
Victory Portfolios, not summed
|
10,974 | ||
| 35 |
Growth Fund of America
Fund
S000009228 · Registered fund · Aug 31, 2026
Growth Fund of America, not summed
|
607,811 | ||
| 36 |
Qube Research & Technologies Ltd
13F
CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
606,068 | ||
| 37 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
577,866 | ||
| 37.1 |
Mid Cap Index Fund
Fund
S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
43,904 | ||
| 37.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
1,738 | ||
| 37.3 |
FlexShares STOXX US ESG Select Index Fund
Fund
S000054498 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
90 | ||
| 38 |
JPMorgan Mid Cap Value Fund
Fund
S000004475 · Registered fund · Jun 30, 2026
J.P. Morgan Fleming Mutual Fund Group, Inc., not summed
|
542,695 | ||
| 39 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Sep 30, 2026
|
528,142 | ||
| 39.1 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
111,882 | ||
| 39.2 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
59,654 | ||
| 39.3 |
Dimensional U.S. Marketwide Value ETF
Fund
S000075030 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
32,349 | ||
| 39.4 |
U.S. CORE EQUITY 1 PORTFOLIO
Fund
S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
25,727 | ||
| 39.5 |
Dimensional U.S. Equity Market ETF
Fund
S000070902 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
20,473 | ||
| 40 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
520,847 | ||
| 41 |
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund
S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
490,632 | ||
| 42 |
PRINCIPAL FINANCIAL GROUP INC
13F
CIK 1126328 · Insurance company · Sep 30, 2026
|
458,256 | ||
| 42.1 |
Small-MidCap Dividend Income Fund
Fund
S000032942 · Registered fund · Aug 31, 2026
Principal Funds, Inc, not summed
|
92,209 | ||
| 42.2 |
MidCap S&P 400 Index Fund
Fund
S000007079 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
25,823 | ||
| 42.3 |
MidCap Value Fund I
Fund
S000007173 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
|
11,340 | ||
| 43 |
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund
S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
446,527 | ||
| 44 |
Assenagon Asset Management S.A.
13F
CIK 1546007 · Unknown · Sep 30, 2026
|
442,273 | ||
| 45 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
428,157 | ||
| 46 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
361,721 | ||
| 46.1 |
Goldman Sachs ActiveBeta(R) U.S. Large Cap Equity ETF
Fund
S000048295 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
44,197 | ||
| 46.2 |
Goldman Sachs Mid Cap Value Fund
Fund
S000009320 · Registered fund · Aug 31, 2026
Goldman Sachs Trust, not summed
|
26,018 | ||
| 46.3 |
Goldman Sachs Equal Weight U.S. Large Cap Equity ETF
Fund
S000058070 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
13,051 | ||
| 46.4 |
Multi-Manager U.S. Small Cap Equity Fund
Fund
S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
|
7,440 | ||
| 46.5 |
Goldman Sachs Small/Mid Cap Equity Fund
Fund
S000044015 · Registered fund · Aug 31, 2026
Goldman Sachs Trust, not summed
|
5,878 | ||
| 47 |
|
361,411 | ||
| 47.1 |
Nuveen Mid Cap Value Fund
Fund
S000005385 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
101,048 | ||
| 47.2 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
54,844 | ||
| 47.3 |
Nuveen Quant Small/Mid Cap Equity Fund
Fund
S000054623 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
53,870 | ||
| 47.4 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
43,700 | ||
| 47.5 |
Nuveen Large Cap Value Index Fund
Fund
S000005388 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
22,441 | ||
| 48 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
327,432 | ||
| 48.1 |
Carillon Scout Mid Cap Fund
Fund
S000058963 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
131,783 | ||
| 48.2 |
Carillon Chartwell Small Cap Fund
Fund
S000058964 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
5,784 | ||
| 48.3 |
Carillon Chartwell Small Cap Growth Fund
Fund
S000075963 · Registered fund · Jun 30, 2026
Carillon Series Trust, not summed
|
4,117 | ||
| 49 |
|
321,728 | ||
| 50 |
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC
13F
CIK 1638555 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
319,833 |
132 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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