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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
PMAM
26
Picton Mahoney Asset Management
Ontario, Canada
$2.52M +$2.51M +250,000 New
CA
27
Crossingbridge Advisors
New York
$2.52M +$2.51M +250,000 New
WA
28
Whitebox Advisors
Minnesota
$2.52M +$2.51M +250,000 New
WRBC
29
W.R. Berkley Corp
Connecticut
$2.3M +$2.29M +228,206 New
BFM
30
Boothbay Fund Management
New York
$2.21M +$2.2M +218,600 New
ASM
31
ATW SPAC Management
New York
$2.2M +$2.2M +218,600 New
CS
32
Clear Street
New York
$1.68M +$1.67M +166,517 New
CC
33
Centiva Capital
New York
$1.51M +$1.51M +150,000 New
DAM
34
DLD Asset Management
New York
$1.51M +$1.51M +150,000 New
MI
35
MMCAP International
Cayman Islands
$1.26M +$1.26M +125,000 New
Parallax Volatility Advisers
36
Parallax Volatility Advisers
California
$1.01M +$1M +100,000 New
GAM
37
Gritstone Asset Management
Maryland
$1.01M +$1M +100,000 New
WC
38
Wealthspring Capital
New York
$780K +$778K +77,376 New
Jane Street
39
Jane Street
New York
$657K +$654K +65,110 New
WAM
40
Wolverine Asset Management
Illinois
$261K +$260K +25,900 New
HCM
41
Highbridge Capital Management
New York
$253K +$251K +25,000 New
TCM
42
Tuttle Capital Management
Connecticut
$201K +$201K +20,000 New
WAM
43
Warberg Asset Management
Illinois
$101K +$100K +10,000 New
UBS Group
44
UBS Group
Switzerland
$10.1K +$10.1K +1,000 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.