MKS Inc.
DE ˙ DB ˙ US55306N1046
279,60 € ↓ -5,10 (-1,79%)
2026-06-05
AKTIENPREIS
SecurityDE:MKT / MKS Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership319,921 shares
Latest Disclosed Value $ 51,123,376
Alliancebernstein L.p. reports 271.47% increase in ownership of MKT / MKS Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 319,921 shares of MKS Inc. (DE:MKT) valued at $59,137,397 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 86,122 shares of MKS Inc.. This represents a change in shares of 271.47% during the quarter. The current value of the position is $89,449,912 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MKS COM 55306N104 319,921 233,799 271.47 51,123 271.48 0.0166
2026-02-17 2025-12-31 13F MKS COM 55306N104 86,122 1,410 1.66 13,762 31.27 0.0043
2025-11-14 2025-09-30 13F MKS COM 55306N104 84,712 -1,178 -1.37 10,485 22.85 0.0033
2025-08-14 2025-06-30 13F MKS COM 55306N104 85,890 -1,275 -1.46 8,534 22.16 0.0028
2025-05-15 2025-03-31 13F MKS INSTRS COM 55306N104 87,165 -1,321 -1.49 6,986 -24.37 0.0025
2025-02-12 2024-12-31 13F MKS INSTRS COM 55306N104 88,486 -2,513 -2.76 9,237 -6.62 0.0031
2024-11-14 2024-09-30 13F MKS INSTRS COM 55306N104 90,999 2,954 3.36 9,893 -13.95 0.0033
2024-08-14 2024-06-30 13F MKS INSTRS COM 55306N104 88,045 -3,199 -3.51 11,497 -5.27 0.0040
2024-05-14 2024-03-31 13F MKS INSTRS COM 55306N104 91,244 -1,329 -1.44 12,135 27.44 0.0043
2024-02-14 2023-12-31 13F MKS INSTRS COM 55306N104 92,573 1,092 1.19 9,523 20.29 0.0037
2023-11-14 2023-09-30 13F MKS INSTRS COM 55306N104 91,481 3,140 3.55 7,917 -17.10 0.0034
2023-08-15 2023-06-30 13F MKS INSTRS COM 55306N104 88,341 2,845 3.33 9,550 26.04 0.0039
2023-05-15 2023-03-31 13F MKS INSTRS COM 55306N104 85,496 -130,827 -60.48 7,577 -58.67 0.0032
2023-02-15 2022-12-31 13F MKS INSTRS COM 55306N104 216,323 -134,751 -38.38 18,329 -36.82 0.0082
2022-11-15 2022-09-30 13F MKS INSTRS COM 55306N104 351,074 36,346 11.55 29,013 -10.18 0.0140
2022-08-15 2022-06-30 13F MKS INSTRS COM 55306N104 314,728 -47,227 -13.05 32,301 -40.51 0.0148
2022-05-13 2022-03-31 13F MKS INSTRS COM 55306N104 361,955 -108,123 -23.00 54,293 -33.69 0.0210
2022-02-14 2021-12-31 13F MKS INSTRS COM 55306N104 470,078 1,399 0.30 81,873 15.76 0.0289
2021-11-10 2021-09-30 13F MKS INSTRS COM 55306N104 468,679 -974,794 -67.53 70,728 -72.47 0.0279
2021-07-30 2021-06-30 13F MKS INSTRS COM 55306N104 1,443,473 -11,900 -0.82 256,866 -4.81 0.1031
2021-05-06 2021-03-31 13F MKS INSTRS COM 55306N104 1,455,373 -147,082 -9.18 269,855 11.93 0.1183
2021-02-08 2020-12-31 13F MKS INSTRS COM 55306N104 1,602,455 -146,018 -8.35 241,089 26.23 0.1138
2020-11-12 2020-09-30 13F MKS INSTRS COM 55306N104 1,748,473 310,217 21.57 190,986 17.26 0.1028
2020-08-13 2020-06-30 13F MKS INSTRS COM 55306N104 1,438,256 691,921 92.71 162,868 167.92 0.0957
2020-05-14 2020-03-31 13F MKS INSTRS COM 55306N104 746,335 574,742 334.94 60,789 222.03 0.0436
2020-02-18 2019-12-31 13F MKS INSTRUMENT COM 55306N104 171,593 3,066 1.82 18,877 21.38 0.0107
2019-11-14 2019-09-30 13F MKS INSTRUMENT COM 55306N104 168,527 43,461 34.75 15,552 59.66 0.0097
2019-08-14 2019-06-30 13F MKS INSTRUMENT COM 55306N104 125,066 5,870 4.92 9,741 -12.17 0.0061
2019-05-14 2019-03-31 13F MKS INSTRUMENT COM 55306N104 119,196 -4,520 -3.65 11,091 38.76 0.0072
2019-02-13 2018-12-31 13F MKS INSTRUMENT COM 55306N104 123,716 75,666 157.47 7,993 107.56 0.0059
2018-11-08 2018-09-30 13F MKS INSTRUMENT COM 55306N104 48,050 4,614 10.62 3,851 -7.36 0.0025
2018-08-13 2018-06-30 13F MKS INSTRUMENT COM 55306N104 43,436 -92,254 -67.99 4,157 -73.51 0.0029
2018-05-14 2018-03-31 13F MKS INSTRUMENT COM 55306N104 135,690 -5,430 -3.85 15,693 17.67 0.0113
2018-02-13 2017-12-31 13F MKS INSTRUMENT COM 55306N104 141,120 1,336 0.96 13,336 1.01 0.0095
2017-11-13 2017-09-30 13F MKS INSTRUMENT COM 55306N104 139,784 25,240 22.04 13,203 71.27 0.0099
2017-08-10 2017-06-30 13F MKS INSTRUMENT COM 55306N104 114,544 32,240 39.17 7,709 36.25 0.0060
2017-05-11 2017-03-31 13F MKS INSTRUMENT COM 55306N104 82,304 -5,200 -5.94 5,658 8.85 0.0045
2017-02-13 2016-12-31 13F MKS INSTRUMENT COM 55306N104 87,504 -427,125 -83.00 5,198 -79.69 0.0043
2016-11-10 2016-09-30 13F MKS INSTRUMENT COM 55306N104 514,629 -132,240 -20.44 25,593 -8.12 0.0216
2016-08-11 2016-06-30 13F MKS INSTRUMENT COM 55306N104 646,869 18,640 2.97 27,854 17.76 0.0240
2016-05-13 2016-03-31 13F MKS INSTRUMENT COM 55306N104 628,229 -22,000 -3.38 23,653 1.05 0.0201
2016-02-16 2015-12-31 13F/A-1 MKS INSTRUMENT COM 55306N104 650,229 62,050 10.55 23,408 18.69 0.0199
2016-02-12 2015-12-31 13F MKS INSTRUMENT COM 55306N104 650,229 21,802
2015-11-13 2015-09-30 13F MKS INSTRUMENT COM 55306N104 588,179 25,380 4.51 19,722 -7.64 0.0169
2015-08-14 2015-06-30 13F MKS INSTRUMENT COM 55306N104 562,799 -19,895 -3.41 21,353 8.39 0.0176
2015-05-13 2015-03-31 13F MKS INSTRUMENTS COM 55306N104 582,694 -9,380 -1.58 19,701 -9.09 0.0160
2015-02-13 2014-12-31 13F MKS INSTRUMENTS COM 55306N104 592,074 -102,380 -14.74 21,670 -6.52 0.0180
2014-11-13 2014-09-30 13F MKS INSTRUMENTS COM 55306N104 694,454 50,610 7.86 23,181 15.25 0.0195
2014-08-13 2014-06-30 13F MKS INSTRUMENTS COM 55306N104 643,844 -891,674 -58.07 20,114 -56.18 0.0170
2014-05-13 2014-03-31 13F MKS INSTRUMENTS COM 55306N104 1,535,518 -96,164 -5.89 45,897 -6.05 0.0397
2014-02-13 2013-12-31 13F MKS INSTRUMENTS COM 55306N104 1,631,682 -11,039 -0.67 48,853 11.84 0.0437
2013-11-14 2013-09-30 13F MKS INSTRUMENTS COM 55306N104 1,642,721 -31,559 -1.88 43,680 -1.70 0.0431
2013-08-13 2013-06-30 13F MKS INSTRUMENTS COM 55306N104 1,674,280 1,674,280 44,435 0.0472
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.