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673 hedge funds and large institutions have $18.5B invested in ATI in 2026 Q1 according to their latest regulatory filings, with 164 funds opening new positions, 244 increasing their positions, 190 reducing their positions, and 51 closing their positions.

New
Increased
Maintained
Reduced
Closed

222% more first-time investments, than exits

New positions opened: 164 | Existing positions closed: 51

106% more call options, than puts

Call options by funds: $159M | Put options by funds: $77.3M

28% more repeat investments, than reductions

Existing positions increased: 244 | Existing positions reduced: 190

25% more capital invested

Capital invested by funds: $14.8B → $18.5B (+$3.75B)

18% more funds holding

Funds holding: 570673 (+103)

8% more funds holding in top 10

Funds holding in top 10: 1213 (+1)

1.25% less ownership

Funds ownership: 94.57%93.33% (-1.2%)

Holders
673
Holders Change
+103
Holders Change %
+18.07%
% of All Funds
8.29%
Holding in Top 10
13
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+8.33%
% of All Funds
0.16%
New
164
Increased
244
Reduced
190
Closed
51
Calls
$159M
Puts
$77.3M
Net Calls
+$82M
Net Calls Change
+$11.5M
Name Holding Trade Value Shares
Change
Change in
Stake
CC
676
Cartenna Capital
Connecticut
-$29.8M -260,000 Closed
Voloridge Investment Management
677
Voloridge Investment Management
Florida
-$20.2M -175,732 Closed
CCS
678
Concentric Capital Strategies
Connecticut
-$18.6M -161,956 Closed
WAM
679
Weiss Asset Management
Massachusetts
-$13.7M -119,031 Closed
JGC
680
J. Goldman & Co
New York
-$13.1M -114,246 Closed
LOM
681
LTS One Management
New York
-$11.8M -102,500 Closed
Connor, Clark & Lunn Investment Management (CC&L)
682
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
-$11.6M -100,869 Closed
NIM
683
NEOS Investment Management
Connecticut
-$8.96M -78,117 Closed
SC
684
SummitTX Capital
Texas
-$7.88M -68,660 Closed
LF
685
Lansforsakringar Fondforvaltning
Sweden
-$7.23M -63,028 Closed
SC
686
Sagefield Capital
Texas
-$5.9M -51,455 Closed
RC
687
Roubaix Capital
Colorado
-$4.28M -37,284 Closed
Mackenzie Financial
688
Mackenzie Financial
Ontario, Canada
-$2.19M -18,849 Closed
Toronto Dominion Bank
689
Toronto Dominion Bank
Ontario, Canada
-$2.04M -17,780 Closed
DL
690
Dockside LLC
New York
-$1.82M -15,844 Closed
TI
691
Trexquant Investment
Connecticut
-$1.67M -14,551 Closed
AWA
692
Arete Wealth Advisors
Illinois
-$1.52M -13,236 Closed
Simplex Trading
693
Simplex Trading
Illinois
-$1.33M -9,545 Closed
A
694
AlphaQuest
New York
-$1.09M -9,519 Closed
RIM
695
Redwood Investment Management
Arizona
-$1.09M -9,495 Closed
Walleye Trading
696
Walleye Trading
New York
-$1.3M -9,362 Closed
GCM
697
Greenland Capital Management
New York
-$861K -7,500 Closed
AA
698
ALPS Advisors
Colorado
-$693K -6,042 Closed
SI
699
Sapience Investments
California
-$676K -5,893 Closed
MAM
700
Madison Asset Management
Wisconsin
-$631K -5,500 Closed