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ATII

Archimedes Tech SPAC Partners II Co
ATII

49 hedge funds and large institutions have $230M invested in Archimedes Tech SPAC Partners II Co in 2025 Q4 according to their latest regulatory filings, with 3 funds opening new positions, 11 increasing their positions, 9 reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed

22% more repeat investments, than reductions

Existing positions increased: 11 | Existing positions reduced: 9

7% more funds holding

Funds holding: 46 → 49 (+3)

2% more capital invested

Capital invested by funds: $225M → $230M (+$5.47M)

100% less funds holding in top 10

Funds holding in top 10: 1 → 0 (-1)

Holders
49
Holders Change
+3
Holders Change %
+6.52%
% of All Funds
0.6%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
3
Increased
11
Reduced
9
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
RCM
Rivernorth Capital Management
Florida
+$933K
2
Baird Financial Group
Baird Financial Group
Wisconsin
+$813K
3
SCM
Shaolin Capital Management
Florida
+$734K
4
MC
Meteora Capital
Florida
+$710K
5
SG
StoneX Group
New York
+$524K

Top Sellers

Rank Fund Capital Flow
1
SC
Sculptor Capital
New York
-$1.44M
2
WAM
Wolverine Asset Management
Illinois
-$1.05M
3
PC
Periscope Capital
Ontario, Canada
-$538K
4
SSA
Schonfeld Strategic Advisors
New York
-$499K
5
MSU
Mizuho Securities USA
New York
-$324K
Name Holding Trade Value Shares
Change 		Change in
Stake
TCM
1
Tenor Capital Management
New York
$15.5M – – –
MF
2
Magnetar Financial
Illinois
$13.5M – – –
D.E. Shaw & Co
3
D.E. Shaw & Co
New York
$11.8M – – –
LA
4
Linden Advisors
New York
$10.4M – – –
AA
5
AQR Arbitrage
Connecticut
$9.99M – – –
WCMNY
6
Westchester Capital Management (New York)
New York
$9.4M +$74K +7,144 +0.8%
GCL
7
Glazer Capital LLC
New York
$8.95M -$112K -10,784 -1%
LP
8
LMR Partners
United Kingdom
$8.81M – – –
GCM
9
Ghisallo Capital Management
Massachusetts
$8.29M – – –
GL
10
Governors Lane
New York
$7.86M +$89.3K +8,617 +1%
AIMCA
11
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$7.77M – – –
Two Sigma Investments
12
Two Sigma Investments
New York
$7.51M – – –
MC
13
Meteora Capital
Florida
$7.44M +$710K +68,533 +11%
Hudson Bay Capital Management
14
Hudson Bay Capital Management
Connecticut
$7.25M – – –
RCM
15
Radcliffe Capital Management
Pennsylvania
$6.82M +$485K +46,800 +8%
SC
16
Sculptor Capital
New York
$6.22M -$1.44M -139,354 -19%
DCM
17
Driehaus Capital Management
Illinois
$5.94M – – –
JG
18
Jain Global
New York
$5.18M – – –
PMAM
19
Picton Mahoney Asset Management
Ontario, Canada
$5.18M – – –
MCM
20
Moore Capital Management
New York
$4.66M – – –
PC
21
Periscope Capital
Ontario, Canada
$4.64M -$538K -51,900 -10%
RCM
22
Rivernorth Capital Management
Florida
$4.64M +$933K +90,000 +25%
COPPSERS
23
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$4.14M – – –
WAM
24
Wolverine Asset Management
Illinois
$3.68M -$1.05M -100,972 -22%
Goldman Sachs
25
Goldman Sachs
New York
$3.36M – – –
1
2

ATII Hedge Fund Activity: Q4 2025 in Review

49 of the 8,226 institutional investors tracked by Wall St. Rank reported a position in Archimedes Tech SPAC Partners II Co (ATII) for Q4 2025, worth a combined $230M — up 2.4% from $225M a quarter earlier.

Buyers outnumbered sellers: 3 funds opened new ATII positions and 0 closed out — a net gain of 3 holders — while 11 added to existing stakes and 9 trimmed.

The largest buyer was Rivernorth Capital Management, adding an estimated $933K. The largest seller was Sculptor Capital, cutting an estimated $1.44M.

  • 49 institutional investors held Archimedes Tech SPAC Partners II Co (ATII) as of Q4 2025, up from 46 in Q3 2025.
  • Funds reported $230M of Archimedes Tech SPAC Partners II Co stock for Q4 2025, up 2.4% quarter-over-quarter.
  • 3 funds opened new Archimedes Tech SPAC Partners II Co positions in Q4 2025 and 0 closed out, a net change of +3 holders.
  • The largest Archimedes Tech SPAC Partners II Co buyer in Q4 2025 was Rivernorth Capital Management, an estimated $933K added.
  • The largest Archimedes Tech SPAC Partners II Co seller in Q4 2025 was Sculptor Capital, an estimated $1.44M sold.

Based on aggregated 13F filings for Q4 2025.