MKS Inc.
DE ˙ DB ˙ US55306N1046
279,60 € ↓ -5,10 (-1,79%)
2026-06-05
DEL PRIS
SecurityDE:MKT / MKS Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership25,842 shares
Latest Disclosed Value $ 5,938,884
Stifel Financial Corp reports 55.97% decrease in ownership of MKT / MKS Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 25,842 shares of MKS Inc. (DE:MKT) valued at $4,776,894 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 58,696 shares of MKS Inc.. This represents a change in shares of -55.97% during the quarter. The current value of the position is $7,225,423 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.

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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)
2026-05-12 2026-03-31 13F MKS COM 55306N104 25,842 -32,854 -55.97 5,939 -36.69 0.0013
2026-02-13 2025-12-31 13F MKS COM 55306N104 58,696 318 0.54 9,380 29.81 0.0084
2025-11-12 2025-09-30 13F MKS COM 55306N104 58,378 -21,750 -27.14 7,225 -9.25 0.0066
2025-08-14 2025-06-30 13F MKS COM 55306N104 80,128 -3,037 -3.65 7,962 19.44 0.0077
2025-05-14 2025-03-31 13F MKS INSTRS COM 55306N104 83,165 21,156 34.12 6,666 2.97 0.0071
2025-02-13 2024-12-31 13F MKS INSTRS COM 55306N104 62,009 2,270 3.80 6,474 -0.32 0.0067
2024-11-14 2024-09-30 13F MKS INSTRS COM 55306N104 59,739 288 0.48 6,495 -16.35 0.0068
2024-08-13 2024-06-30 13F MKS INSTRS COM 55306N104 59,451 1,257 2.16 7,763 0.31 0.0087
2024-05-14 2024-03-31 13F MKS INSTRS COM 55306N104 58,194 3,006 5.45 7,740 36.32 0.0088
2024-02-12 2023-12-31 13F MKS INSTRS COM 55306N104 55,188 -142 -0.26 5,677 18.57 0.0071
2023-11-13 2023-09-30 13F MKS INSTRS COM 55306N104 55,330 246 0.45 4,789 -19.60 0.0067
2023-08-14 2023-06-30 13F MKS INSTRS COM 55306N104 55,084 -3,178 -5.45 5,955 15.34 0.0081
2023-05-12 2023-03-31 13F MKS INSTRS COM 55306N104 58,262 -10,416 -15.17 5,164 -11.27 0.0074
2023-02-13 2022-12-31 13F MKS INSTRS COM 55306N104 68,678 -10,917 -13.72 5,820 -11.54 0.0087
2022-11-14 2022-09-30 13F MKS INSTRS COM 55306N104 79,595 16,490 26.13 6,578 1.56 0.0108
2022-08-15 2022-06-30 13F MKS INSTRS COM 55306N104 63,105 8,618 15.82 6,477 -20.75 0.0101
2022-05-13 2022-03-31 13F MKS INSTRS COM 55306N104 54,487 7,479 15.91 8,173 -0.17 0.0112
2022-02-14 2021-12-31 13F MKS INSTRS COM 55306N104 47,008 22,820 94.34 8,187 124.30 0.0108
2021-11-15 2021-09-30 13F MKS INSTRS COM 55306N104 24,188 -13 -0.05 3,650 -15.23 0.0054
2021-08-13 2021-06-30 13F MKS INSTRS COM 55306N104 24,201 -723 -2.90 4,306 -6.82 0.0064
2021-05-14 2021-03-31 13F MKS INSTRS COM 55306N104 24,924 7,300 41.42 4,621 74.31 0.0076
2021-02-12 2020-12-31 13F MKS INSTRS COM 55306N104 17,624 2,168 14.03 2,651 57.05 0.0047
2020-11-16 2020-09-30 13F MKS INSTRS COM 55306N104 15,456 -1,242 -7.44 1,688 -10.74 0.0035
2020-08-14 2020-06-30 13F MKS INSTRS COM 55306N104 16,698 -2,162 -11.46 1,891 23.68 0.0043
2020-05-14 2020-03-31 13F MKS INSTRS COM 55306N104 18,860 -3,654 -16.23 1,529 -38.40 0.0042
2020-02-13 2019-12-31 13F MKS INSTRUMENT COM 55306N104 22,514 726 3.33 2,482 23.24 0.0052
2019-11-19 2019-09-30 13F/A-1 MKS INSTRUMENT COM 55306N104 21,788 -3,880 -15.12 2,014 -0.10 0.0051
2019-11-13 2019-09-30 13F MKS INSTRUMENT COM 55306N104 21,759 -3,909 2,011 1,127.2663
2019-08-14 2019-06-30 13F MKS INSTRUMENT COM 55306N104 25,668 814 3.28 2,016 -13.22 0.0052
2019-05-14 2019-03-31 13F MKS INSTRUMENT COM 55306N104 24,854 12,731 105.02 2,323 199.74 0.0066
2019-02-13 2018-12-31 13F MKS INSTRUMENT COM 55306N104 12,123 -6,378 -34.47 775 -47.67 0.0025
2018-11-13 2018-09-30 13F MKS INSTRUMENT COM 55306N104 18,501 -17,282 -48.30 1,481 -56.83 0.0042
2018-08-14 2018-06-30 13F MKS INSTRUMENT COM 55306N104 35,783 24,428 215.13 3,431 160.32 0.0105
2018-05-11 2018-03-31 13F MKS INSTRUMENT COM 55306N104 11,355 988 9.53 1,318 34.63 0.0042
2018-02-14 2017-12-31 13F MKS INSTRUMENT COM 55306N104 10,367 2,846 37.84 979 38.67 0.0031
2017-11-13 2017-09-30 13F MKS INSTRUMENT COM 55306N104 7,521 -13,855 -64.82 706 -50.87 0.0025
2017-08-14 2017-06-30 13F MKS INSTRUMENT COM 55306N104 21,376 -2,606 -10.87 1,437 -12.54 0.0053
2017-05-10 2017-03-31 13F MKS INSTRUMENT COM 55306N104 23,982 17,342 261.17 1,643 312.81 0.0064
2017-02-16 2016-12-31 13F MKS INSTRUMENT COM 55306N104 6,640 -155 -2.28 398 17.40 0.0017
2016-11-15 2016-09-30 13F MKS INSTRUMENT COM 55306N104 6,795 6,795 339 0.0015
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.