Financial reports
ARS
2023 FY
Annual report to shareholders
8 Apr 24
10-K
2023 FY
Annual report
29 Feb 24
10-Q
2023 Q3
Quarterly report
3 Nov 23
10-Q
2023 Q2
Quarterly report
8 Aug 23
10-Q
2023 Q1
Quarterly report
5 May 23
ARS
2022 FY
Annual report to shareholders
13 Apr 23
10-K
2022 FY
Annual report
28 Feb 23
10-Q
2022 Q3
Quarterly report
4 Nov 22
10-Q
2022 Q2
Quarterly report
1 Aug 22
10-Q
2022 Q1
Quarterly report
3 May 22
Current reports
8-K
Departure of Directors or Certain Officers
28 Feb 24
8-K
Ecovyst Reports Fourth Quarter and Full Year 2023 Results
28 Feb 24
8-K
Departure of Directors or Certain Officers
18 Dec 23
8-K
Regulation FD Disclosure
28 Nov 23
8-K
Ecovyst Reports Third Quarter 2023 Results
2 Nov 23
8-K
Ecovyst Reports Second Quarter 2023 Results
3 Aug 23
8-K
Entry into a Material Definitive Agreement
26 May 23
8-K
Submission of Matters to a Vote of Security Holders
11 May 23
8-K
Ecovyst Reports First Quarter 2023 Results
4 May 23
8-K
Departure of Directors or Certain Officers
11 Apr 23
Registration and prospectus
424B7
Prospectus with selling stockholder info
25 May 23
FWP
Free writing prospectus
23 May 23
424B7
Prospectus with selling stockholder info
23 May 23
424B7
Prospectus with selling stockholder info
6 Mar 23
FWP
Free writing prospectus
2 Mar 23
424B7
Prospectus with selling stockholder info
2 Mar 23
424B7
Prospectus with selling stockholder info
15 Nov 22
FWP
Free writing prospectus
14 Nov 22
424B7
Prospectus with selling stockholder info
14 Nov 22
424B7
Prospectus with selling stockholder info
4 Aug 22
Proxies
DEF 14A
Definitive proxy
8 Apr 24
PRE 14A
Preliminary proxy
15 Mar 24
DEF 14A
Definitive proxy
13 Apr 23
DEF 14A
Definitive proxy
29 Apr 22
DEF 14A
Definitive proxy
1 Apr 21
DEF 14A
Definitive proxy
26 Mar 20
DEFA14A
Additional proxy soliciting materials
19 Apr 19
DEF 14A
Definitive proxy
26 Mar 19
DEF 14A
Definitive proxy
5 Apr 18
Other
UPLOAD
Letter from SEC
10 Jan 24
CORRESP
Correspondence with SEC
4 Jan 24
UPLOAD
Letter from SEC
19 Dec 23
CORRESP
Correspondence with SEC
30 Nov 23
UPLOAD
Letter from SEC
17 Nov 23
SD
Conflict minerals disclosure
31 May 23
SD
Conflict minerals disclosure
31 May 22
SD
Conflict minerals disclosure
28 May 21
SD
Conflict minerals disclosure
1 Jun 20
CERTNYS
Certification of approval for NYSE listing
29 Sep 17
Ownership
4
Susan F Ward
26 Mar 24
144
Notice of proposed sale of securities
22 Mar 24
4
Sarah Lorance
12 Mar 24
3
Sarah Lorance
8 Mar 24
SC 13G/A
VANGUARD GROUP INC
13 Feb 24
SC 13G
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
13 Feb 24
SC 13G/A
CCMP Capital Investors III, L.P.
12 Feb 24
SC 13G
DIMENSIONAL FUND ADVISORS LP
9 Feb 24
SC 13G
BlackRock Inc.
26 Jan 24
4
Bryan K. Brown
24 Jan 24