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ARCI

Archimedes Tech SPAC Partners III
ARCI

40 hedge funds and large institutions have $153M invested in Archimedes Tech SPAC Partners III in 2026 Q1 according to their latest regulatory filings, with 40 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed

44.14% more ownership

Funds ownership: 0% → 44.14% (+44%)

Holders
40
Holders Change
+40
Holders Change %
–
% of All Funds
0.49%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
40
Increased
–
Reduced
–
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Adage Capital Partners
Adage Capital Partners
Massachusetts
+$17.8M
2
LA
Linden Advisors
New York
+$11.8M
3
MF
Magnetar Financial
Illinois
+$11.8M
4
GL
Governors Lane
New York
+$9.87M
5
TCM
Tenor Capital Management
New York
+$9.87M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
Adage Capital Partners
1
Adage Capital Partners
Massachusetts
$17.7M +$17.8M +1,800,000 New
LA
2
Linden Advisors
New York
$11.8M +$11.8M +1,200,000 New
MF
3
Magnetar Financial
Illinois
$11.8M +$11.8M +1,200,000 New
GL
4
Governors Lane
New York
$9.85M +$9.87M +1,000,000 New
TCM
5
Tenor Capital Management
New York
$9.85M +$9.87M +1,000,000 New
SAMU
6
SONA Asset Management (US)
New York
$7.88M +$7.89M +800,000 New
Verition Fund Management
7
Verition Fund Management
Connecticut
$7.39M +$7.4M +750,000 New
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
8
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$5.42M +$5.43M +550,000 New
SCM
9
Shaolin Capital Management
Florida
$5.32M +$5.33M +540,454 New
GCL
10
Glazer Capital LLC
New York
$4.97M +$4.98M +504,602 New
MCM
11
Moore Capital Management
New York
$4.92M +$4.93M +500,000 New
PAMP
12
Polar Asset Management Partners
Ontario, Canada
$4.92M +$4.93M +500,000 New
MC
13
Meteora Capital
Florida
$4.76M +$4.77M +483,740 New
D.E. Shaw & Co
14
D.E. Shaw & Co
New York
$4.19M +$4.19M +425,000 New
RCM
15
Radcliffe Capital Management
Pennsylvania
$4.08M +$4.09M +414,297 New
PC
16
Periscope Capital
Ontario, Canada
$4.03M +$4.04M +409,001 New
Hudson Bay Capital Management
17
Hudson Bay Capital Management
Connecticut
$2.96M +$2.96M +300,000 New
KPF
18
K2 Principal Fund
Ontario, Canada
$2.95M +$2.96M +299,536 New
Two Sigma Investments
19
Two Sigma Investments
New York
$2.7M +$2.7M +273,791 New
HI
20
HBK Investments
Texas
$2.46M +$2.47M +250,004 New
GCM
21
Ghisallo Capital Management
Massachusetts
$2.46M +$2.47M +250,000 New
WRBC
22
W.R. Berkley Corp
Connecticut
$2.44M +$2.45M +248,000 New
CS
23
Clear Street
New York
$2.37M +$2.38M +240,763 New
6CM
24
683 Capital Management
New York
$1.97M +$1.97M +200,000 New
FTCM
25
First Trust Capital Management
Illinois
$1.97M +$1.97M +200,000 New
1
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ARCI Hedge Fund Activity: Q1 2026 in Review

40 of the 8,172 institutional investors tracked by Wall St. Rank reported a position in Archimedes Tech SPAC Partners III (ARCI) for Q1 2026, worth a combined $153M.

Buyers outnumbered sellers: 40 funds opened new ARCI positions and 0 closed out — a net gain of 40 holders — while 0 added to existing stakes and 0 trimmed.

The largest buyer was Adage Capital Partners, opening a new position worth an estimated $17.8M.

  • 40 institutional investors held Archimedes Tech SPAC Partners III (ARCI) as of Q1 2026, up from 0 in Q4 2025.
  • Funds reported $153M of Archimedes Tech SPAC Partners III stock for Q1 2026.
  • 40 funds opened new Archimedes Tech SPAC Partners III positions in Q1 2026 and 0 closed out, a net change of +40 holders.
  • The largest Archimedes Tech SPAC Partners III buyer in Q1 2026 was Adage Capital Partners, an estimated $17.8M added.

Based on aggregated 13F filings for Q1 2026.