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Equibles

Magnetar Financial LLC

Position in ARCI — Archimedes Tech SPAC Partners III Co.

CIK 1352851 EVANSTON, IL
Back to ARCI Full portfolio

Position in ARCI

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$12,012,000
+$192,000 QoQ
Shares Held
1,500,000
0.0% QoQ
Ownership
4.25%
of shares outstanding
% of Portfolio
0.12%
of 13F equity value
Holder Rank
#3
of 60 holders
Holding Since
Mar 2026
2 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in ARCI Over Time

Shares Held

Position Value (USD)

Position in Shell Companies

Financial Services · as of Jun 30, 2026

Magnetar Financial LLC holds $1,947,232,949 across 223 Shell Companies names. ARCI ranks #57 (0.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 CCXI
Churchill Capital Corp XI
 2,188,525 $33,478,261
2 CXII
Churchill Capital Corp XII
 2,970,000 $28,755,000
3 DMII
Drugs Made In America Acquisition II Corp.
 5,400,000 $27,162,000
4 EVAC
EQV Ventures Acquisition Corp. II
 2,499,993 $25,449,928
5 GCGR
General Catalyst Global Resilience Merger Corp.
 3,125,000 $25,225,000
6 TACH
Titan Acquisition Corp.
 3,300,000 $22,902,000
7 CAII
Collective Acquisition Corp. II
 3,267,000 $21,562,200
8 LPBB
Launch Two Acquisition Corp.
 2,970,000 $21,225,600

All Filings in ARCI

Export CSV
2 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $12,012,000 1,200,000
2026-03-31 $11,820,000 1,200,000