13F Insight
DOSSIER · 13F Holders · Q1 2026Mega-capCrowded

ARTIUS II ACQUISITION INC

53 institutions still hold ARTIUS II ACQUISITION INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G0509J115·53 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 7.0%
vs prior quarter
13F value held
$151M
54.0% inst. owned
of float
Holders
53
+118 QoQ
filers reporting
Activity
+89 / −108
+890 added · −892 reduced
this quarter
Concentration
10.28%
HGC Investment Management Inc. #1
top holder share
AI Holders Summary · Q1 2026

53 institutions reported ARTIUS II ACQUISITION INC in Q1 2026. HGC Investment Management Inc. leads at 10.3% of the visible book. +118 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
HGC Investment Management Inc.
CIK 0001711200
$16M1.5M3.44%Q1 202602
AQR Arbitrage LLC
CIK 0001167456
$15M1.5M0.32%Q4 202503
LINDEN ADVISORS LP
CIK 0001279396
$10M1.0M0.06%Q1 202604
Westchester Capital Management, LLC
CIK 0001512805
$10M996K0.47%Q1 202605
Alberta Investment Management Corp
CIK 0001463559· Sovereign
$10M980K0.06%Q1 202606
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
CIK 0001535845
$9M850K0.01%Q1 202607
Polar Asset Management Partners Inc.
CIK 0001326389
$8M800K0.17%Q1 202608
PICTON MAHONEY ASSET MANAGEMENT
CIK 0001539041
$8M750K0.06%Q1 202609
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$7M725K0.01%Q1 202610
Radcliffe Capital Management, L.P.
CIK 0001218275
$7M679K0.53%Q1 202611
D. E. Shaw & Co., Inc.
CIK 0001009207
$6M600K0.00%Q4 202512
Shaolin Capital Management LLC
CIK 0001766806
$6M550K0.21%Q1 202613
Hudson Bay Capital Management LP
CIK 0001393825
$6M550K0.02%Q1 202614
Sculptor Capital LP
CIK 0001054587
$5M500K0.05%Q1 202615
MOORE CAPITAL MANAGEMENT, LP
CIK 0001448574
$5M500K0.11%Q1 202616
HBK INVESTMENTS L P
CIK 0001011443
$5M500K0.05%Q1 202617
GOLDMAN SACHS GROUP INC
CIK 0000886982
$5M463K0.00%Q1 202618
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS
CIK 0001083190
$4M398K0.02%Q1 202619
BERKLEY W R CORP
CIK 0000011544
$4M397K0.22%Q1 202620
First Trust Capital Management L.P.
CIK 0001604488
$4M380K0.21%Q1 2026
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