Nierenberg Investment Management Company’s Matrix Service MTRX Stock Holding History

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

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q2	–	Sell	-44,555	Closed	-$554K	–	55
2025 Q1	$554K	Sell	44,555 -5,000	-10%	-$66.9K	0.3%	35
2024 Q4	$593K	Hold	49,555	–	–	0.33%	30
2024 Q3	$571K	Sell	49,555 -50,000	-50%	-$496K	0.32%	35
2024 Q2	$989K	Hold	99,555	–	–	0.55%	30
2024 Q1	$1.3M	Sell	99,555 -23,000	-19%	-$258K	0.72%	19
2023 Q4	$1.2M	Sell	122,555 -100,000	-45%	-$1.09M	0.72%	18
2023 Q3	$2.63M	Hold	222,555	–	–	1.89%	7
2023 Q2	$1.31M	Hold	222,555	–	–	0.9%	15
2023 Q1	$1.2M	Hold	222,555	–	–	0.91%	13
2022 Q4	$1.38M	Buy	222,555 +19,481	+10%	+$101K	1.04%	10
2022 Q3	$841K	Buy	203,074 +47,519	+31%	+$243K	0.7%	17
2022 Q2	$787K	Buy	+155,555	New	+$975K	0.65%	18

Other funds holding MTRX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

NIM

Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return

Harvey Partners Tarrytown, New York $1.26B AUM 64.44% 1-Year Est. Return

AAM

ACK Asset Management Greenwich, Connecticut $801M AUM 60.42% 1-Year Est. Return

FWSM

First Wilshire Securities Management Pasadena, California $444M AUM 42.88% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

WCM

Westerly Capital Management San Francisco, California $368M AUM 42.67% 1-Year Est. Return

Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return

Nierenberg Investment Management Company's MTRX Position: Q2 2025 in Review

Nierenberg Investment Management Company sold out of Matrix Service (MTRX) in Q2 2025, closing a stake of 44,555 shares — an estimated $554K sold.

Nierenberg Investment Management Company first reported a position in MTRX in Q2 2022 and held it in 12 quarters. The position peaked at $2.63M in Q3 2023. 124 funds tracked by Wall St. Rank hold MTRX as of Q2 2025.

Nierenberg Investment Management Company reported no remaining Matrix Service position as of Q2 2025 after selling out during the quarter.
Nierenberg Investment Management Company sold 44,555 Matrix Service shares in Q2 2025, an estimated $554K.
Nierenberg Investment Management Company first reported a position in Matrix Service in Q2 2022 and held it in 12 quarters.
Nierenberg Investment Management Company's Matrix Service position peaked at $2.63M in Q3 2023.
124 funds tracked by Wall St. Rank held Matrix Service as of Q2 2025.

Based on Nierenberg Investment Management Company's 13F filing for Q2 2025, filed 11 Aug 2025.