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103 hedge funds and large institutions have $51.9M invested in Arq in 2025 Q4 according to their latest regulatory filings, with 28 funds opening new positions, 32 increasing their positions, 26 reducing their positions, and 18 closing their positions.

New
Increased
Maintained
Reduced
Closed

760% more call options, than puts

Call options by funds: $129K | Put options by funds: $15K

56% more first-time investments, than exits

New positions opened: 28 | Existing positions closed: 18

23% more repeat investments, than reductions

Existing positions increased: 32 | Existing positions reduced: 26

10% more funds holding

Funds holding: 94103 (+9)

4.47% less ownership

Funds ownership: 41.64%37.17% (-4.5%)

59% less capital invested

Capital invested by funds: $127M → $51.9M (-$75.4M)

100% less funds holding in top 10

Funds holding in top 10: 30 (-3)

Holders
103
Holders Change
+9
Holders Change %
+9.57%
% of All Funds
1.25%
Holding in Top 10
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-100%
% of All Funds
New
28
Increased
32
Reduced
26
Closed
18
Calls
$129K
Puts
$15K
Net Calls
+$114K
Net Calls Change
-$2.2M
Name Holding Trade Value Shares
Change
Change in
Stake
ACM
1
AIGH Capital Management
Maryland
$7.43M -$1.5M -306,394 -12%
BlackRock
2
BlackRock
New York
$6.69M +$188K +38,506 +2%
Vanguard Group
3
Vanguard Group
Pennsylvania
$5.98M +$463K +94,744 +5%
RA
4
Royce & Associates
New York
$4.77M +$415K +85,000 +6%
Dimensional Fund Advisors
5
Dimensional Fund Advisors
Texas
$3.01M +$308K +62,988 +7%
AFA
6
Alta Fundamental Advisers
New York
$2.55M -$319K -65,206 -8%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$2.54M +$17.1K +3,505 +0.5%
State Street
8
State Street
Massachusetts
$1.84M +$26.4K +5,413 +1%
Marshall Wace
9
Marshall Wace
United Kingdom
$1.45M +$2.17M +444,207 New
Renaissance Technologies
10
Renaissance Technologies
New York
$1.35M +$1.67M +341,918 +486%
Morgan Stanley
11
Morgan Stanley
New York
$1.19M +$328K +67,042 +23%
AQR Capital Management
12
AQR Capital Management
Connecticut
$980K +$1.46M +299,787 New
Jacobs Levy Equity Management
13
Jacobs Levy Equity Management
New Jersey
$858K +$1.28M +262,330 New
DA
14
DCF Advisers
Connecticut
$852K +$1.27M +260,570 New
PLC
15
Peapod Lane Capital
New York
$747K +$1.12M +228,564 New
Northern Trust
16
Northern Trust
Illinois
$657K -$179K -36,552 -15%
MG
17
Marex Group
$621K -$293K -60,000 -24%
GCP
18
GSA Capital Partners
United Kingdom
$529K +$791K +161,836 New
GC
19
Gratia Capital
California
$507K -$1.4M -287,020 -65%
Goldman Sachs
20
Goldman Sachs
New York
$424K +$134K +27,527 +27%
Lazard Asset Management
21
Lazard Asset Management
New York
$362K +$541K +110,783 New
Charles Schwab
22
Charles Schwab
California
$327K +$54.6K +11,177 +13%
American Century Companies
23
American Century Companies
Missouri
$276K +$19K +3,884 +5%
Millennium Management
24
Millennium Management
New York
$262K -$253K -51,771 -39%
Bank of America
25
Bank of America
North Carolina
$260K +$41.3K +8,455 +12%

ARQ Hedge Fund Activity: Q4 2025 in Review

103 of the 8,228 institutional investors tracked by Wall St. Rank reported a position in Arq (ARQ) for Q4 2025, worth a combined $51.9M — down 59% from $127M a quarter earlier.

Buyers outnumbered sellers: 28 funds opened new ARQ positions and 18 closed out — a net gain of 10 holders — while 32 added to existing stakes and 26 trimmed.

The largest buyer was Marshall Wace, opening a new position worth an estimated $2.17M. The largest seller was Wellington Management Group, exiting entirely with an estimated $4.91M sold.

  • 103 institutional investors held Arq (ARQ) as of Q4 2025, up from 94 in Q3 2025.
  • Funds reported $51.9M of Arq stock for Q4 2025, down 59% quarter-over-quarter.
  • 28 funds opened new Arq positions in Q4 2025 and 18 closed out, a net change of +10 holders.
  • The largest Arq buyer in Q4 2025 was Marshall Wace, an estimated $2.17M added.
  • The largest Arq seller in Q4 2025 was Wellington Management Group, an estimated $4.91M sold.

Based on aggregated 13F filings for Q4 2025.