Entegris, Inc.
MX ˙ BMV ˙ US29362U1043
SecurityMX:ENTG / Entegris, Inc.
InstitutionRafferty Asset Management, LLC
Latest Disclosed Ownership1,051,873 shares
Latest Disclosed Value $ 123,321,591
Rafferty Asset Management, LLC reports 20.13% decrease in ownership of ENTG / Entegris, Inc.

On May 15, 2026 - Rafferty Asset Management, LLC filed a 13F-HR form disclosing ownership of 1,051,873 shares of Entegris, Inc. (MX:ENTG) valued at $123,321,591 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,316,939 shares of Entegris, Inc.. This represents a change in shares of -20.13% during the quarter.

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)
2026-05-15 2026-03-31 13F ENTEGRIS COM 29362U104 1,051,873 -265,066 -20.13 123,322 11.15 0.5007
2026-02-13 2025-12-31 13F ENTEGRIS COM 29362U104 1,316,939 43,112 3.38 110,952 -5.80 0.3833
2025-11-12 2025-09-30 13F ENTEGRIS COM 29362U104 1,273,827 -696,907 -35.36 117,778 -25.90 0.3820
2025-08-14 2025-06-30 13F ENTEGRIS COM 29362U104 1,970,734 771,650 64.35 158,940 51.52 0.5243
2025-05-14 2025-03-31 13F ENTEGRIS COM 29362U104 1,199,084 -92,411 -7.16 104,896 -18.01 0.4472
2025-02-14 2024-12-31 13F ENTEGRIS COM 29362U104 1,291,495 -29,634 -2.24 127,935 -13.94 0.4527
2024-11-13 2024-09-30 13F ENTEGRIS COM 29362U104 1,321,129 102,985 8.45 148,667 -9.86 0.5093
2024-08-13 2024-06-30 13F ENTEGRIS COM 29362U104 1,218,144 -118,763 -8.88 164,937 -12.22 0.6122
2024-05-13 2024-03-31 13F ENTEGRIS COM 29362U104 1,336,907 390,604 41.28 187,889 65.71 0.7009
2024-02-13 2023-12-31 13F ENTEGRIS COM 29362U104 946,303 124,392 15.13 113,386 46.90 0.4781
2023-11-13 2023-09-30 13F ENTEGRIS COM 29362U104 821,911 -52,957 -6.05 77,186 -20.39 0.4536
2023-08-11 2023-06-30 13F ENTEGRIS COM 29362U104 874,868 200,588 29.75 96,953 75.33 0.5466
2023-05-11 2023-03-31 13F ENTEGRIS COM 29362U104 674,280 98,345 17.08 55,298 46.39 0.3747
2023-02-13 2022-12-31 13F ENTEGRIS COM 29362U104 575,935 59,335 11.49 37,776 -11.92 0.3163
2022-11-14 2022-09-30 13F ENTEGRIS COM 29362U104 516,600 25,211 5.13 42,888 -5.27 0.4565
2022-08-12 2022-06-30 13F ENTEGRIS COM 29362U104 491,389 -97,600 -16.57 45,272 -41.44 0.4166
2022-05-13 2022-03-31 13F ENTEGRIS COM 29362U104 588,989 117,925 25.03 77,311 18.43 0.4582
2022-02-10 2021-12-31 13F ENTEGRIS COM 29362U104 471,064 160,562 51.71 65,280 66.99 0.3436
2021-11-10 2021-09-30 13F ENTEGRIS COM 29362U104 310,502 -91,648 -22.79 39,092 -20.95 0.2671
2021-08-10 2021-06-30 13F ENTEGRIS COM 29362U104 402,150 38,800 10.68 49,452 21.73 0.3114
2021-05-10 2021-03-31 13F ENTEGRIS COM 29362U104 363,350 200,396 122.98 40,623 159.41 0.2776
2021-02-10 2020-12-31 13F ENTEGRIS COM 29362U104 162,954 -959 -0.59 15,660 28.52 0.1530
2020-11-13 2020-09-30 13F ENTEGRIS COM 29362U104 163,913 19,142 13.22 12,185 42.53 0.1474
2020-08-07 2020-06-30 13F ENTEGRIS COM 29362U104 144,771 98,723 214.39 8,549 314.60 0.1205
2020-05-15 2020-03-31 13F ENTEGRIS COM 29362U104 46,048 -28,982 -38.63 2,062 -45.13 0.0863
2020-02-10 2019-12-31 13F ENTEGRIS COM 29362U104 75,030 9,991 15.36 3,758 22.77 0.0578
2019-11-14 2019-09-30 13F ENTEGRIS COM 29362U104 65,039 -44,322 -40.53 3,061 -24.99 0.0479
2019-08-09 2019-06-30 13F ENTEGRIS COM 29362U104 109,361 5,442 5.24 4,081 10.03 0.0717
2019-05-15 2019-03-31 13F ENTEGRIS COM 29362U104 103,919 5,403 5.48 3,709 34.97 0.0597
2019-02-11 2018-12-31 13F ENTEGRIS COM 29362U104 98,516 -3,250 -3.19 2,748 -6.72 0.0599
2018-11-09 2018-09-30 13F ENTEGRIS COM 29362U104 101,766 -51,297 -33.51 2,946 -43.23 0.0456
2018-08-14 2018-06-30 13F ENTEGRIS COM 29362U104 153,063 -2,858 -1.83 5,189 -4.37 0.0775
2018-05-15 2018-03-31 13F ENTEGRIS COM 29362U104 155,921 30,293 24.11 5,426 41.86 0.0804
2018-02-14 2017-12-31 13F ENTEGRIS COM 29362U104 125,628 50,018 66.15 3,825 75.38 0.0661
2017-11-13 2017-09-30 13F ENTEGRIS COM 29362U104 75,610 75,610 2,181 0.0489
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.