QUODD

Insider Transactions last 24 months for Ecovyst Inc. - NYSE: ECVT

Transactions
All	Buy	Sell	Option Exercise

Filer's Name	Relationship/ Title	Trans. Date	Trans. Type	Ownership Type	Security Type	Shares	Price	Trans. Value	Total Shares Owned
Bitting Kurt	See Remarks	03/12/2026	AM	Direct	COM	38,064	$3.04	$115,714.56	698,382
Koscinski Joseph S.	See Remarks	03/04/2026	AA	Direct	COM	11,052	$11.31	$124,998.12	595,784
Feehan Michael	See Remarks	03/04/2026	AA	Direct	COM	11,052	$11.31	$124,998.12	389,071
Brown Bryan K.	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	109,015
Feehan Michael	See Remarks	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	378,019
Feehan Michael	See Remarks	02/03/2026	DF	Direct	COM	4,834	$10.31	$49,838.54	358,620
Althoff Donald L.	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	58,376
Koscinski Joseph S.	See Remarks	02/03/2026	AA	Direct	COM	27,158	$0.00	$0.00	584,732
Ward Susan F	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	97,660
Bitting Kurt	See Remarks	02/03/2026	AA	Direct	COM	116,392	$0.00	$0.00	660,318
Bitting Kurt	See Remarks	02/03/2026	DF	Direct	COM	25,925	$10.31	$267,286.75	543,926
Lorance Sarah	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	63,150
Catalano Anna C	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	102,805
Fogarty Kevin Michael	Director	02/03/2026	AA	Direct	COM	38,798	$0.00	$0.00	215,998
Bradley David A.	Director	02/03/2026	AA	Direct	COM	19,399	$0.00	$0.00	107,999
Bitting Kurt	See Remarks	01/22/2026	DF	Direct	COM	16,053	$10.84	$174,014.52	569,851
Feehan Michael	See Remarks	01/22/2026	DF	Direct	COM	4,246	$10.84	$46,026.64	363,454
Feehan Michael	See Remarks	01/05/2026	DF	Direct	COM	6,231	$9.80	$61,063.80	367,700
Bitting Kurt	See Remarks	01/05/2026	DF	Direct	COM	16,097	$9.80	$157,750.60	585,904
Ward Susan F	Director	11/07/2025	DS	Direct	COM	15,000	$8.40	$126,018.00	78,261
Catalano Anna C	Director	02/03/2025	AA	Direct	COM	25,674	$0.00	$0.00	83,406
Fogarty Kevin Michael	Director	02/03/2025	AA	Direct	COM	51,348	$0.00	$0.00	177,200
Koscinski Joseph S.	See Remarks	02/03/2025	AA	Direct	COM	35,944	$0.00	$0.00	557,574
Feehan Michael	See Remarks	02/03/2025	AA	Direct	COM	25,674	$0.00	$0.00	373,931
Brown Bryan K.	Director	02/03/2025	AA	Direct	COM	25,674	$0.00	$0.00	89,616

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Transaction Type Key First letter: A = Acquired, D = Disposed Second letter: A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security \| D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) \| E = Expiration of short derivative position \| F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. \| G = Gift \| H = Expiration (or cancellation) of long derivative position with value received \| I = Discretionary transaction in accordance with Rule 16b-3(f) \| J = Other \| L = Small acquisition under Rule 16a-6 \| M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 \| O = Exercise of out-of-the-money derivative security \| P = Open market or private purchase \| S = Open market or private sale \| U = Disposition pursuant to a tender of shares in a change of control transaction \| W = Acquisition or disposition by will or the laws of descent and distribution \| X = Exercise of in-the-money or at-the-money derivative security \| Z = Deposit into or withdrawal from voting trust		Send to Excel

Transaction Type Key
First letter: A = Acquired, D = Disposed
Second letter:
A = Grant, award or other acquisition pursuant to Rule 16b-3(d) C = Conversion of derivative security | D = Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e) | E = Expiration of short derivative position | F = Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3. | G = Gift | H = Expiration (or cancellation) of long derivative position with value received | I = Discretionary transaction in accordance with Rule 16b-3(f) | J = Other | L = Small acquisition under Rule 16a-6 | M = Exercise or conversion of derivative security exempted pursuant to Rule 16b-3 | O = Exercise of out-of-the-money derivative security | P = Open market or private purchase | S = Open market or private sale | U = Disposition pursuant to a tender of shares in a change of control transaction | W = Acquisition or disposition by will or the laws of descent and distribution | X = Exercise of in-the-money or at-the-money derivative security | Z = Deposit into or withdrawal from voting trust

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