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ATIIU

Archimedes Tech SPAC Partners II Co Unit
ATIIU

9 hedge funds and large institutions have $13.4M invested in Archimedes Tech SPAC Partners II Co Unit in 2025 Q2 according to their latest regulatory filings, with 1 funds opening new positions, 1 increasing their positions, 3 reducing their positions, and 36 closing their positions.

New
Increased
Maintained
Reduced
Closed

67% less repeat investments, than reductions

Existing positions increased: 1 | Existing positions reduced: 3

77.42% less ownership

Funds ownership: 83.7% → 6.28% (-77%)

80% less funds holding

Funds holding: 44 → 9 (-35)

93% less capital invested

Capital invested by funds: $194M → $13.4M (-$181M)

97% less first-time investments, than exits

New positions opened: 1 | Existing positions closed: 36

Holders
9
Holders Change
-35
Holders Change %
-79.55%
% of All Funds
0.12%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
1
Increased
1
Reduced
3
Closed
36
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
+$32K
2
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
+$10

Top Sellers

Rank Fund Capital Flow
1
TCM
Tenor Capital Management
New York
-$15.2M
2
AA
AQR Arbitrage
Connecticut
-$13.1M
3
MF
Magnetar Financial
Illinois
-$13.1M
4
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
-$10.1M
5
LA
Linden Advisors
New York
-$10.1M
Name Holding Trade Value Shares
Change 		Change in
Stake
Millennium Management
1
Millennium Management
New York
$5.15M – – –
RCM
2
Rivernorth Capital Management
Florida
$4.58M – – –
JP Morgan Chase
3
JP Morgan Chase
New York
$1.45M -$4.14M -405,215 -75%
MI
4
MMCAP International
Cayman Islands
$1.29M – – –
Jane Street
5
Jane Street
New York
$481K -$189K -18,450 -28%
TCM
6
Tuttle Capital Management
Connecticut
$206K – – –
CS
7
Clear Street
New York
$198K -$1.51M -147,323 -88%
UBS Group
8
UBS Group
Switzerland
$42K +$32K +3,130 +313%
Toronto Dominion Bank
9
Toronto Dominion Bank
Ontario, Canada
$10 +$10 +1 New
TCM
10
Tenor Capital Management
New York
– -$15.2M -1,500,000 Closed
AA
11
AQR Arbitrage
Connecticut
– -$13.1M -1,303,242 Closed
MF
12
Magnetar Financial
Illinois
– -$13.1M -1,300,000 Closed
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
13
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
– -$10.1M -1,000,000 Closed
LA
14
Linden Advisors
New York
– -$10.1M -1,000,000 Closed
LP
15
LMR Partners
United Kingdom
– -$8.56M -850,000 Closed
GCL
16
Glazer Capital LLC
New York
– -$8.46M -839,370 Closed
CL
17
CSS LLC
Illinois
– -$8.27M -820,803 Closed
GCM
18
Ghisallo Capital Management
Massachusetts
– -$8.06M -800,000 Closed
Two Sigma Investments
19
Two Sigma Investments
New York
– -$7.31M -725,000 Closed
Hudson Bay Capital Management
20
Hudson Bay Capital Management
Connecticut
– -$7.07M -700,000 Closed
SCM
21
Shaolin Capital Management
Florida
– -$6.55M -650,531 Closed
MSU
22
Mizuho Securities USA
New York
– -$6.01M -600,000 Closed
D.E. Shaw & Co
23
D.E. Shaw & Co
New York
– -$5.81M -575,000 Closed
MCM
24
Moore Capital Management
New York
– -$4.54M -450,000 Closed
WCMNY
25
Westchester Capital Management (New York)
New York
– -$4.03M -400,000 Closed
1
2

ATIIU Hedge Fund Activity: Q2 2025 in Review

9 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Archimedes Tech SPAC Partners II Co Unit (ATIIU) for Q2 2025, worth a combined $13.4M — down 93% from $194M a quarter earlier.

Sellers outnumbered buyers: 36 funds closed out of ATIIU and 1 opened new positions — a net loss of 35 holders — while 3 trimmed existing stakes and 1 added.

The largest buyer was UBS Group, adding an estimated $32K. The largest seller was Tenor Capital Management, exiting entirely with an estimated $15.2M sold.

  • 9 institutional investors held Archimedes Tech SPAC Partners II Co Unit (ATIIU) as of Q2 2025, down from 44 in Q1 2025.
  • Funds reported $13.4M of Archimedes Tech SPAC Partners II Co Unit stock for Q2 2025, down 93% quarter-over-quarter.
  • 1 fund opened new Archimedes Tech SPAC Partners II Co Unit positions in Q2 2025 and 36 closed out, a net change of -35 holders.
  • The largest Archimedes Tech SPAC Partners II Co Unit buyer in Q2 2025 was UBS Group, an estimated $32K added.
  • The largest Archimedes Tech SPAC Partners II Co Unit seller in Q2 2025 was Tenor Capital Management, an estimated $15.2M sold.

Based on aggregated 13F filings for Q2 2025.