Ecovyst Inc.
US ˙ NYSE ˙ US27923Q1094

SecurityECVT / Ecovyst Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership958,764 shares
Latest Disclosed Value $ 12,329,706
Northern Trust Corp reports 4.91% increase in ownership of ECVT / Ecovyst Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 958,764 shares of Ecovyst Inc. (US:ECVT) valued at $12,329,705 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 913,916 shares of Ecovyst Inc.. This represents a change in shares of 4.91% during the quarter. The current value of the position is $12,396,819 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)
2026-05-14 2026-03-31 13F ECOVYST COM 27923Q109 958,764 44,848 4.91 12,330 38.65 0.0003
2026-02-17 2025-12-31 13F ECOVYST COM 27923Q109 913,916 -102,900 -10.12 8,892 -0.17 0.0002
2025-11-14 2025-09-30 13F ECOVYST COM 27923Q109 1,016,816 74,785 7.94 8,907 14.90 0.0003
2025-08-13 2025-06-30 13F ECOVYST COM 27923Q109 942,031 -250,478 -21.00 7,753 4.86 0.0011
2025-05-13 2025-03-31 13F ECOVYST COM 27923Q109 1,192,509 127,764 12.00 7,394 -9.11 0.0011
2025-02-14 2024-12-31 13F ECOVYST COM 27923Q109 1,064,745 83,408 8.50 8,135 21.01 0.0012
2024-11-13 2024-09-30 13F ECOVYST COM 27923Q109 981,337 47,553 5.09 6,722 -19.75 0.0011
2024-08-14 2024-06-30 13F ECOVYST COM 27923Q109 933,784 96,003 11.46 8,376 -10.33 0.0014
2024-05-14 2024-03-31 13F ECOVYST COM 27923Q109 837,781 -432,893 -34.07 9,341 -24.75 0.0016
2024-02-13 2023-12-31 13F ECOVYST COM 27923Q109 1,270,674 16,759 1.34 12,414 0.62 0.0022
2023-11-13 2023-09-30 13F ECOVYST COM 27923Q109 1,253,915 53,530 4.46 12,339 -10.31 0.0024
2023-08-11 2023-06-30 13F ECOVYST COM 27923Q109 1,200,385 525,522 77.87 13,756 84.47 0.0026
2023-05-15 2023-03-31 13F ECOVYST COM 27923Q109 674,863 63,960 10.47 7,457 37.79 0.0015
2023-02-13 2022-12-31 13F ECOVYST COM 27923Q109 610,903 -23,210 -3.66 5,413 1.14 0.0011
2022-11-14 2022-09-30 13F ECOVYST COM 27923Q109 634,113 97,124 18.09 5,351 1.15 0.0012
2022-08-12 2022-06-30 13F ECOVYST COM 27923Q109 536,989 34,210 6.80 5,290 -8.98 0.0011
2022-05-13 2022-03-31 13F ECOVYST COM 27923Q109 502,779 -38,233 -7.07 5,812 4.91 0.0010
2022-02-08 2021-12-31 13F ECOVYST COM 27923Q109 541,012 -322,050 -37.31 5,540 -44.95 0.0009
2021-11-15 2021-09-30 13F ECOVYST COM 27923Q109 863,062 -23,063 -2.60 10,063 -26.07 0.0018
2021-08-13 2021-06-30 13F PQ GROUP HLDGS COM 73943T103 886,125 58,054 7.01 13,611 -1.58 0.0024
2021-05-12 2021-03-31 13F PQ GROUP HLDGS COM 73943T103 828,071 -417,510 -33.52 13,829 -22.14 0.0026
2021-02-11 2020-12-31 13F PQ GROUP HLDGS COM 73943T103 1,245,581 -14,851 -1.18 17,762 37.35 0.0035
2020-11-16 2020-09-30 13F PQ GROUP HLDGS COM 73943T103 1,260,432 -436 -0.03 12,932 -22.54 0.0028
2020-08-14 2020-06-30 13F PQ GROUP HLDGS COM 73943T103 1,260,868 481,426 61.77 16,694 96.49 0.0040
2020-05-14 2020-03-31 13F PQ GROUP HLDGS COM 73943T103 779,442 -3,581 -0.46 8,496 -36.84 0.0024
2020-02-14 2019-12-31 13F PQ GROUP HLDGS COM 73943T103 783,023 -1,893 -0.24 13,451 7.51 0.0030
2019-11-13 2019-09-30 13F PQ GROUP HLDGS COM 73943T103 784,916 112,728 16.77 12,511 17.43 0.0030
2019-08-13 2019-06-30 13F PQ GROUP HLDGS COM 73943T103 672,188 212,793 46.32 10,654 52.90 0.0025
2019-05-13 2019-03-31 13F PQ GROUP HLDGS COM 73943T103 459,395 -4,926 -1.06 6,968 1.34 0.0017
2019-02-12 2018-12-31 13F PQ GROUP HLDGS COM 73943T103 464,321 7,316 1.60 6,876 -13.88 0.0019
2018-11-14 2018-09-30 13F PQ GROUP HLDGS COM 73943T103 457,005 28,954 6.76 7,984 3.62 0.0020
2018-09-18 2018-06-30 13F/A-1 PQ GROUP HLDGS COM 73943T103 428,051 120,474 39.17 7,705 79.31 0.0020
2018-08-14 2018-06-30 13F PQ GROUP HLDGS COM 73943T103 436,899 129,322 7,864
2018-05-09 2018-03-31 13F PQ GROUP HLDGS COM 73943T103 307,577 8,469 2.83 4,297 -12.68 0.0011
2018-02-14 2017-12-31 13F PQ GROUP HLDGS COM 73943T103 299,108 299,108 4,921 0.0012
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.