David A. Siegel Ecovyst Inc. Transaction History

Two Sigma Advisers, LP

$47 Billion
Q3 2025

A detailed history of David A. Siegel (Two Sigma Advisers, LP) transactions in Ecovyst Inc. stock. As of the latest transaction made, Two Sigma Advisers, LP holds 21,200 shares of ECVT stock, worth $181,472. This represents 0.0% of its overall portfolio holdings.

Number of Shares

21,200

Previous 71,700 70.43%

Holding current value

$181,472

Previous $590,000 68.64%

% of portfolio

0.0%

Previous 0.0%

17 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	SELL	$7.6 - $9.37 $383,800 - $473,184	-50,500 Reduced 70.43%	21,200 $185,000
Q2 2025 Aug 14, 2025	SELL	$5.33 - $8.58 $1.22 Million - $1.97 Million	-229,400 Reduced 76.19%	71,700 $590,000
Q1 2025 May 15, 2025	SELL	$6.2 - $8.42 $753,300 - $1.02 Million	-121,500 Reduced 28.75%	301,100 $1.87 Million
Q4 2024 Feb 14, 2025	SELL	$6.15 - $8.62 $275,520 - $386,175	-44,800 Reduced 9.58%	422,600 $3.23 Million
Q3 2024 Nov 14, 2024	SELL	$6.22 - $9.76 $324,062 - $508,496	-52,100 Reduced 10.03%	467,400 $3.2 Million

Q2 2024 Aug 14, 2024	SELL	$8.76 - $11.04 $123,516 - $155,664	-14,100 Reduced 2.64%	519,500 $4.66 Million
Q1 2024 May 15, 2024	BUY	$8.87 - $11.15 $357,460 - $449,345	40,300 Added 8.17%	533,600 $5.95 Million
Q4 2023 Feb 14, 2024	BUY	$8.81 - $10.2 $231,703 - $268,260	26,300 Added 5.63%	493,300 $4.82 Million
Q3 2023 Nov 14, 2023	SELL	$9.52 - $12.32 $2.01 Million - $2.6 Million	-211,200 Reduced 31.14%	467,000 $4.6 Million
Q2 2023 Aug 14, 2023	SELL	$9.99 - $11.67 $1.89 Million - $2.21 Million	-189,200 Reduced 21.81%	678,200 $7.77 Million
Q1 2023 May 15, 2023	BUY	$8.84 - $11.13 $354,484 - $446,313	40,100 Added 4.85%	867,400 $9.58 Million
Q4 2022 Feb 14, 2023	BUY	$8.59 - $10.07 $2.31 Million - $2.71 Million	269,200 Added 48.24%	827,300 $7.33 Million
Q3 2022 Nov 14, 2022	BUY	$8.42 - $10.78 $1.52 Million - $1.94 Million	180,200 Added 47.68%	558,100 $4.71 Million
Q2 2022 Aug 15, 2022	BUY	$9.35 - $11.77 $905,080 - $1.14 Million	96,800 Added 34.44%	377,900 $3.72 Million
Q1 2022 May 16, 2022	BUY	$9.39 - $11.97 $1.35 Million - $1.72 Million	144,100 Added 105.18%	281,100 $3.25 Million
Q4 2021 Feb 14, 2022	BUY	$9.55 - $13.19 $1.03 Million - $1.42 Million	107,700 Added 367.58%	137,000 $1.4 Million
Q3 2021 Nov 15, 2021	BUY	$11.41 - $16.87 $334,313 - $494,291	29,300 New	29,300 $342,000

Others Institutions Holding ECVT

# of Institutions

179

Shares Held

118M

Call Options Held

Put Options Held

View Full List

About Ecovyst Inc.

Ticker ECVT
Exchange NYSE
Sector Basic Materials
Industry Specialty Chemicals
Shares Outstandng 136,740,000
Market Cap $1.17B
Description
Ecovyst Inc. provides specialty catalysts and services in the United States, the Netherlands, the United Kingdom, and internationally. The company operates through two segments, Ecoservices and Catalyst Technologies. The Ecoservices segment offers sulfuric acid recycling services for production of alkylate for refineries; and virgin sulfuric aci...

More about ECVT

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