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ATIIU

Archimedes Tech SPAC Partners II Co Unit
ATIIU

44 hedge funds and large institutions have $194M invested in Archimedes Tech SPAC Partners II Co Unit in 2025 Q1 according to their latest regulatory filings, with 44 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed

83.7% more ownership

Funds ownership: 0% → 83.7% (+84%)

Holders
44
Holders Change
+44
Holders Change %
–
% of All Funds
0.59%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
44
Increased
–
Reduced
–
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
TCM
Tenor Capital Management
New York
+$15.1M
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
+$10M
5
LA
Linden Advisors
New York
+$10M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change 		Change in
Stake
TCM
1
Tenor Capital Management
New York
$15.2M +$15.1M +1,500,000 New
AA
2
AQR Arbitrage
Connecticut
$13.1M +$13.1M +1,303,242 New
MF
3
Magnetar Financial
Illinois
$13.1M +$13.1M +1,300,000 New
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
4
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$10.1M +$10M +1,000,000 New
LA
5
Linden Advisors
New York
$10.1M +$10M +1,000,000 New
LP
6
LMR Partners
United Kingdom
$8.56M +$8.54M +850,000 New
GCL
7
Glazer Capital LLC
New York
$8.46M +$8.44M +839,370 New
CL
8
CSS LLC
Illinois
$8.27M +$8.25M +820,803 New
GCM
9
Ghisallo Capital Management
Massachusetts
$8.06M +$8.04M +800,000 New
Two Sigma Investments
10
Two Sigma Investments
New York
$7.31M +$7.29M +725,000 New
Hudson Bay Capital Management
11
Hudson Bay Capital Management
Connecticut
$7.07M +$7.03M +700,000 New
SCM
12
Shaolin Capital Management
Florida
$6.55M +$6.54M +650,531 New
MSU
13
Mizuho Securities USA
New York
$6.01M +$6.03M +600,000 New
D.E. Shaw & Co
14
D.E. Shaw & Co
New York
$5.81M +$5.78M +575,000 New
JP Morgan Chase
15
JP Morgan Chase
New York
$5.49M +$5.46M +543,595 New
Millennium Management
16
Millennium Management
New York
$5.04M +$5.02M +500,000 New
MCM
17
Moore Capital Management
New York
$4.54M +$4.52M +450,000 New
RCM
18
Rivernorth Capital Management
Florida
$4.54M +$4.52M +450,000 New
WCMNY
19
Westchester Capital Management (New York)
New York
$4.03M +$4.02M +400,000 New
SSA
20
Schonfeld Strategic Advisors
New York
$3.53M +$3.52M +350,000 New
KPF
21
K2 Principal Fund
Ontario, Canada
$3.22M +$3.21M +319,790 New
PC
22
Periscope Capital
Ontario, Canada
$3.03M +$3.01M +300,000 New
MTCM
23
Mint Tower Capital Management
Netherlands
$3.02M +$3.01M +300,000 New
Verition Fund Management
24
Verition Fund Management
Connecticut
$2.94M +$2.93M +291,500 New
AC
25
Aristeia Capital
Connecticut
$2.52M +$2.51M +250,000 New
1
2

ATIIU Hedge Fund Activity: Q1 2025 in Review

44 of the 7,458 institutional investors tracked by Wall St. Rank reported a position in Archimedes Tech SPAC Partners II Co Unit (ATIIU) for Q1 2025, worth a combined $194M.

Buyers outnumbered sellers: 44 funds opened new ATIIU positions and 0 closed out — a net gain of 44 holders — while 0 added to existing stakes and 0 trimmed.

The largest buyer was Tenor Capital Management, opening a new position worth an estimated $15.1M.

  • 44 institutional investors held Archimedes Tech SPAC Partners II Co Unit (ATIIU) as of Q1 2025, up from 0 in Q4 2024.
  • Funds reported $194M of Archimedes Tech SPAC Partners II Co Unit stock for Q1 2025.
  • 44 funds opened new Archimedes Tech SPAC Partners II Co Unit positions in Q1 2025 and 0 closed out, a net change of +44 holders.
  • The largest Archimedes Tech SPAC Partners II Co Unit buyer in Q1 2025 was Tenor Capital Management, an estimated $15.1M added.

Based on aggregated 13F filings for Q1 2025.