Nierenberg Investment Management Company’s Ecovyst ECVT Stock Holding History

Nierenberg Investment Management Company’s Portfolio ECVT Stock Details ECVT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-228,810	Closed	-$2.23M	–	48
2025 Q4	$2.23M	Hold	228,810	–	–	1.08%	12
2025 Q3	$2M	Hold	228,810	–	–	0.86%	21
2025 Q2	$1.88M	Hold	228,810	–	–	1%	14
2025 Q1	$1.42M	Hold	228,810	–	–	0.77%	17
2024 Q4	$1.75M	Buy	228,810 +1,200	+0.5%	+$8.87K	0.97%	15
2024 Q3	$1.56M	Buy	227,610 +45,000	+25%	+$343K	0.88%	16
2024 Q2	$1.64M	Hold	182,610	–	–	0.92%	15
2024 Q1	$2.04M	Buy	182,610 +44,000	+32%	+$416K	1.13%	10
2023 Q4	$1.35M	Buy	138,610 +11,000	+9%	+$105K	0.81%	14
2023 Q3	$1.26M	Sell	127,610 -11,000	-8%	-$118K	0.9%	15
2023 Q2	$1.59M	Buy	138,610 +500	+0.4%	+$5.44K	1.09%	11
2023 Q1	$1.53M	Buy	+138,110	New	+$1.43M	1.15%	9

Other funds holding ECVT

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Brown Advisory Baltimore, Maryland $60.9B AUM 15.24% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Allspring Global Investments Charlotte, North Carolina $59.7B AUM 29.08% 1-Year Est. Return

Nierenberg Investment Management Company's ECVT Position: Q1 2026 in Review

Nierenberg Investment Management Company sold out of Ecovyst (ECVT) in Q1 2026, closing a stake of 228,810 shares — an estimated $2.23M sold.

Nierenberg Investment Management Company first reported a position in ECVT in Q1 2023 and held it in 12 quarters. The position peaked at $2.23M in Q4 2025. 197 funds tracked by Wall St. Rank hold ECVT as of Q1 2026.

Nierenberg Investment Management Company reported no remaining Ecovyst position as of Q1 2026 after selling out during the quarter.
Nierenberg Investment Management Company sold 228,810 Ecovyst shares in Q1 2026, an estimated $2.23M.
Nierenberg Investment Management Company first reported a position in Ecovyst in Q1 2023 and held it in 12 quarters.
Nierenberg Investment Management Company's Ecovyst position peaked at $2.23M in Q4 2025.
197 funds tracked by Wall St. Rank held Ecovyst as of Q1 2026.

Based on Nierenberg Investment Management Company's 13F filing for Q1 2026, filed 13 May 2026.