Ecovyst Inc.
US ˙ NYSE ˙ US27923Q1094

SecurityECVT / Ecovyst Inc.
InstitutionCwm, Llc
Latest Disclosed Ownership6,355 shares
Latest Disclosed Value $ 81,725
Cwm, Llc reports 3.17% increase in ownership of ECVT / Ecovyst Inc.

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 6,355 shares of Ecovyst Inc. (US:ECVT) valued at $81,725 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 6,160 shares of Ecovyst Inc.. The current value of the position is $82,170 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 6,355 195 3.17 82 0.0002
2026-01-26 2025-12-31 13F ECOVYST COM 27923Q109 6,160 -2,518 -29.02 0 0.0002
2025-10-15 2025-09-30 13F ECOVYST COM 27923Q109 8,678 2,732 45.95 0 0.0002
2025-07-25 2025-06-30 13F ECOVYST COM 27923Q109 5,946 2,298 62.99 0 0.0002
2025-05-01 2025-03-31 13F ECOVYST COM 27923Q109 3,648 -793 -17.86 0 0.0001
2025-02-04 2024-12-31 13F ECOVYST COM 27923Q109 4,441 1,255 39.39 0 0.0001
2024-10-08 2024-09-30 13F ECOVYST COM 27923Q109 3,186 -886 -21.76 0 0.0001
2024-07-10 2024-06-30 13F ECOVYST COM 27923Q109 4,072 4,014 6,920.69 0 0.0002
2024-04-05 2024-03-31 13F ECOVYST COM 27923Q109 58 58 0 0.0000
2024-02-01 2023-12-31 13F ECOVYST COM 27923Q109 0 -139 -100.00 0 0.0000
2023-10-11 2023-09-30 13F ECOVYST COM 27923Q109 139 139 0 0.0000
2023-04-28 2023-03-31 13F ECOVYST COM 27923Q109 0 -46 -100.00 0 0.0000
2023-02-01 2022-12-31 13F ECOVYST COM 27923Q109 46 0 0.00 0 0.0000
2022-10-27 2022-09-30 13F ECOVYST COM 27923Q109 46 22 91.67 0 0.0000
2022-07-28 2022-06-30 13F ECOVYST COM 27923Q109 24 -107 -81.68 0 -100.00
2022-04-21 2022-03-31 13F PQ GROUP HLDGS COM 73943T103 131 131 2 0.0000
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.