Comparable stake leader
Rubric Capital Management LP
SEC ownership of Ecovyst Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001708035.
Disclosed value leader
Rubric Capital Management LP
Comparable rows
50/50
Latest evidence
02 Jun 2026
- Public ticker
- ECVT on NYSE
- Parsed ownership sources
-
13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Rubric Capital Management LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Rubric Capital Management LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
02 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001708035
- Issuer location
- Wayne, PA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Ecovyst Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Rubric Capital Management LP
Disclosed value leader
Rubric Capital Management LP
Comparable rows
50/50
Latest evidence
02 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 9.1%
13D/G row: Rubric Capital Management LP
Showing 1-8 of 50 holder rows.
Quick read
Rubric Capital Management LP leads the comparable SEC ownership view at 9.1%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Rubric Capital Management LP's linked filing trail.
Comparable ownership
Top 5
Rubric Capital Management LP
9.1%
BlackRock, Inc.
7.7%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
HOTCHKIS & WILEY CAPITAL MANAGEME...
4.9%
Kurt Bitting
0.63%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Rubric Capital Management LP |
13F
13D/G
Company
|
9.1%
from 13D/G
|
$117,489,822
9,136,067 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.7%
from 13D/G
|
$112,322,069
8,734,220 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.2%
|
$74,768,542
5,814,039 shares
|
$0 | 31 Mar 2026 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC |
13D/G
13F
Hotchkis and Wiley Capital Management, LLC · Company
|
4.9%
|
$69,622,265
5,413,862 shares
|
-$44,216,409 | 31 Mar 2026 |
| Kurt Bitting |
3/4/5
Director and Chief Executive Officer, Director
|
0.63%
|
$8,143,134
698,382 shares
|
— | 12 Mar 2026 |
| Joseph S. Koscinski |
3/4/5
Vice President, Chief Administrative Officer, General Counsel and Secretary
|
0.54%
|
$6,946,841
595,784 shares
|
— | 04 Mar 2026 |
| Michael Feehan |
3/4/5
Vice President and Chief Financial Officer
|
0.35%
|
$4,536,567
389,071 shares
|
— | 04 Mar 2026 |
| Kevin Michael Fogarty |
3/4/5
Director
|
0.23%
|
$2,490,860
255,998 shares
|
— | 03 Feb 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$238,656.
Buys
$0
Insiders: 0
Sells
$238,656
Insiders: 2
Net
-$238,656
Shares: -23,450
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 23,450
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 8,450 | $0 | $112,638 | -$112,638 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 15,000 | $0 | $126,018 | -$126,018 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 22 reporting-owner rows connected to Ecovyst Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
22
Largest Forms 3/4/5 holder
INEOS Ltd
Net 12M change
-$238,657
Latest report
02 Jun 2026
Recent insider transactions for Ecovyst Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Sarah Lorance | ECVT | Common Stock | Sale | -13.4% | $112,638 | $13.33 | -8,450 | 54,700 | 02 Jun 2026 | Direct |
| Patti A. Humble | ECVT | Common Stock | Award | 9,099 | 9,099 | 26 May 2026 | Direct | |||
| Kurt Bitting | ECVT | Common Stock | Options Exercise | 5.76% | 38,064 | 698,382 | 12 Mar 2026 | Direct | ||
| Kurt Bitting | ECVT | Option (Right to Buy) | Options Exercise | -100% | -38,064 | 0 | 12 Mar 2026 | Direct | ||
| Michael Feehan | ECVT | Common Stock | Award | 2.92% | 11,052 | 389,071 | 04 Mar 2026 | Direct | ||
| Joseph S. Koscinski | ECVT | Common Stock | Award | 1.89% | 11,052 | 595,784 | 04 Mar 2026 | Direct | ||
| Sarah Lorance | ECVT | Common Stock | Award | 44.3% | 19,399 | 63,150 | 03 Feb 2026 | Direct | ||
| Kurt Bitting | ECVT | Common Stock | Award | 21.4% | 116,392 | 660,318 | 03 Feb 2026 | Direct | ||
| Kurt Bitting | ECVT | Common Stock | Tax liability | -4.55% | -25,925 | 543,926 | 03 Feb 2026 | Direct | ||
| Susan F. Ward | ECVT | Common Stock | Award | 24.8% | 19,399 | 97,660 | 03 Feb 2026 | Direct | ||
| Joseph S. Koscinski | ECVT | Common Stock | Award | 4.87% | 27,158 | 584,732 | 03 Feb 2026 | Direct | ||
| Donald L. Althoff | ECVT | Common Stock | Award | 49.8% | 19,399 | 58,376 | 03 Feb 2026 | Direct | ||
| Michael Feehan | ECVT | Common Stock | Award | 5.41% | 19,399 | 378,019 | 03 Feb 2026 | Direct | ||
| Michael Feehan | ECVT | Common Stock | Tax liability | -1.33% | -4,834 | 358,620 | 03 Feb 2026 | Direct | ||
| Bryan K. Brown | ECVT | Common Stock | Award | 21.6% | 19,399 | 109,015 | 03 Feb 2026 | Direct | ||
| Kevin M. Fogarty | ECVT | Common Stock | Award | 21.9% | 38,798 | 215,998 | 03 Feb 2026 | Direct | ||
| David A. Bradley | ECVT | Common Stock | Award | 21.9% | 19,399 | 107,999 | 03 Feb 2026 | Direct | ||
| Anna C. Catalano | ECVT | Common Stock | Award | 23.3% | 19,399 | 102,805 | 03 Feb 2026 | Direct | ||
| Michael Feehan | ECVT | Common Stock | Tax liability | -1.15% | -4,246 | 363,454 | 22 Jan 2026 | Direct | ||
| Kurt Bitting | ECVT | Common Stock | Tax liability | -2.74% | -16,053 | 569,851 | 22 Jan 2026 | Direct | ||
| Kurt Bitting | ECVT | Common Stock | Tax liability | -2.67% | -16,097 | 585,904 | 05 Jan 2026 | Direct | ||
| Michael Feehan | ECVT | Common Stock | Tax liability | -1.67% | -6,231 | 367,700 | 05 Jan 2026 | Direct | ||
| Susan F. Ward | ECVT | Common Stock | Sale | -16.1% | $126,018 | $8.40 | -15,000 | 78,261 | 07 Nov 2025 | Direct |
* marks a reported price that did not pass the local price check.