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Matrix Service
MTRX

143 hedge funds and large institutions have $312M invested in Matrix Service in 2025 Q3 according to their latest regulatory filings, with 31 funds opening new positions, 54 increasing their positions, 39 reducing their positions, and 12 closing their positions.

New
Increased
Maintained
Reduced
Closed

158% more first-time investments, than exits

New positions opened: 31 | Existing positions closed: 12

136% more call options, than puts

Call options by funds: $1.09M | Put options by funds: $461K

38% more repeat investments, than reductions

Existing positions increased: 54 | Existing positions reduced: 39

15% more funds holding

Funds holding: 124 → 143 (+19)

4% less capital invested

Capital invested by funds: $326M → $312M (-$14.1M)

1.03% less ownership

Funds ownership: 87.47% → 86.45% (-1%)

33% less funds holding in top 10

Funds holding in top 10: 3 → 2 (-1)

Holders
143
Holders Change
+19
Holders Change %
+15.32%
% of All Funds
1.88%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.03%
New
31
Increased
54
Reduced
39
Closed
12
Calls
$1.09M
Puts
$461K
Net Calls
+$625K
Net Calls Change
-$1.61M

Top Buyers

1
GJL
Gendell Jeffrey L
+$4.72M
2
WCM
Westerly Capital Management
California
+$3.98M
3
ACA
AYAL Capital Advisors
Ontario, Canada
+$3.2M
4
Millennium Management
Millennium Management
New York
+$2.84M
5
CP
CenterBook Partners
Connecticut
+$2.6M

Top Sellers

1
AAM
ACK Asset Management
Connecticut
-$14.7M
2
Boston Partners
Boston Partners
Massachusetts
-$11.2M
3
HP
Harvey Partners
New York
-$5.25M
4
FWSM
First Wilshire Securities Management
California
-$2.96M
5
Prudential Financial
Prudential Financial
New Jersey
-$2.54M
Name Holding Trade Value Shares
Change 		Change in
Stake
SSG
126
Summit Securities Group
New York
$7.99K +$8.68K +611 New
EP
127
Essential Partners
California
$6.62K +$597 +42 +9%
Optiver Holding
128
Optiver Holding
Netherlands
$6.04K +$6.57K +462 New
GI
129
GAMMA Investing
California
$5.62K -$355 -25 -5%
Group One Trading
130
Group One Trading
Illinois
$4.19K +$4.55K +320 New
TWD
131
True Wealth Design
Ohio
$3.47K – – –
AF
132
Allworth Financial
California
$2.37K +$1.08K +76 +72%
Jones Financial Companies
133
Jones Financial Companies
Missouri
$2.26K +$2.49K +175 New
Comerica Bank
134
Comerica Bank
Texas
$1.35K – – –
Nisa Investment Advisors
135
Nisa Investment Advisors
Missouri
$1.23K – – –
CA
136
Clearstead Advisors
Ohio
$968 +$966 +68 +1,133%
RIL
137
Rothschild Investment LLC
Illinois
$654 – – –
NS
138
NBC Securities
Alabama
$601 +$654 +46 New
PFBT
139
Parkside Financial Bank & Trust
Missouri
$524 – – –
SS
140
Sunbelt Securities
Texas
$314 +$341 +24 New
IA
141
IFP Advisors
Florida
$301 +$327 +23 New
FFA
142
Farther Finance Advisors
California
$131 +$142 +10 New
AAM
143
ACK Asset Management
Connecticut
– -$14.7M -1,087,100 Closed
RC
144
RBF Capital
California
– -$1.35M -100,000 Closed
Susquehanna International Group
145
Susquehanna International Group
Pennsylvania
– -$1.23M -86,810 Closed
Verition Fund Management
146
Verition Fund Management
Connecticut
– -$290K -21,484 Closed
SEI Investments
147
SEI Investments
Pennsylvania
– -$205K -15,170 Closed
AIP
148
Almanack Investment Partners
Pennsylvania
– -$204K -15,119 Closed
Man Group
149
Man Group
United Kingdom
– -$202K -14,971 Closed
YIH
150
Y-Intercept (HK)
Hong Kong
– -$183K -13,550 Closed
3 4 5
6
7

MTRX Hedge Fund Activity: Q3 2025 in Review

143 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in Matrix Service (MTRX) for Q3 2025, worth a combined $312M — down 4.3% from $326M a quarter earlier.

Buyers outnumbered sellers: 31 funds opened new MTRX positions and 12 closed out — a net gain of 19 holders — while 54 added to existing stakes and 39 trimmed.

The largest buyer was Gendell Jeffrey L, adding an estimated $4.72M. The largest seller was ACK Asset Management, exiting entirely with an estimated $14.7M sold.

  • 143 institutional investors held Matrix Service (MTRX) as of Q3 2025, up from 124 in Q2 2025.
  • Funds reported $312M of Matrix Service stock for Q3 2025, down 4.3% quarter-over-quarter.
  • 31 funds opened new Matrix Service positions in Q3 2025 and 12 closed out, a net change of +19 holders.
  • The largest Matrix Service buyer in Q3 2025 was Gendell Jeffrey L, an estimated $4.72M added.
  • The largest Matrix Service seller in Q3 2025 was ACK Asset Management, an estimated $14.7M sold.

Based on aggregated 13F filings for Q3 2025.