Who Owns Archimedes Tech SPAC Partners II Co. Ordinary Shares (ATII)?Hedge Fund & Institutional Holders

$10.47-0.02 (-0.19%)Financial ServicesNASDAQ

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$1.5540134681100012e+188T

% of Float Held

6.877610907083033e+294%

QoQ Change in Holders

+7 / -0

Price History

$9.96$10.15$10.33$10.52$10.70Apr 25Sep 25Mar 26

ATII — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
WOLVERINE ASSET MANAGEMENT LLCNew Position+359K+$3.7M
MIZUHO SECURITIES USA LLCNew Position+304K+$3.0M
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)New Position+200K+$2.1M
L1 Global Manager Pty LtdNew Position+200K+$2.1M
GRITSTONE ASSET MANAGEMENT LLCNew Position+149K+$1.1M
Baird Financial Group, Inc.New Position+79K+$0
StoneX Group Inc.New Position+51K+$0
MORGAN STANLEYIncreased+79+$-521K
UBS Group AGIncreased+788+$-42.1M
Harraden Circle Investments, LLCIncreased+50K+$-622.5M
CSS LLC/ILIncreased+15K+$-717.4M
DLD Asset Management, LPIncreased+392K+$-1.5B
TORONTO DOMINION BANKIncreased+8K+$-1.5B
Shaolin Capital Management LLCIncreased+21K+$-2.3B
MILLENNIUM MANAGEMENT LLCIncreased+4K+$-3.1B

ATII — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
Sculptor Capital LPDecreased-139K-$7.5B
PERISCOPE CAPITAL INC.Decreased-52K-$5.2B
Verition Fund Management LLCDecreased-38K-$2.6B
Schonfeld Strategic Advisors LLCDecreased-75K-$2.3B
JPMORGAN CHASE & CODecreased-38K-$1.4B
K2 PRINCIPAL FUND, L.P.Decreased-46K-$1.3B
Clear Street Group Inc.Decreased-6K-$823.8M
JANE STREET GROUP, LLCDecreased-11-$579.1M
Parallax Volatility Advisers, L.P.Decreased-74K-$45.8M
GLAZER CAPITAL, LLCDecreased-91K-$-2K

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1TENOR CAPITAL MANAGEMENT Co., L.P.1,500,000$15.5M0.22%Share
2Magnetar Financial LLC1,300,000$13.5M0.13%Share
3D. E. Shaw & Co., Inc.1,138,500$11.0M0.01%Share
4LINDEN ADVISORS LP1,000,000$10.4M0.06%Share
5AQR Arbitrage LLC964,382$10.0M0.21%Share
6GLAZER CAPITAL, LLC864,303$9.0M0.24%Share
7Westchester Capital Management, LLC840,153$8.7M0.37%Share
8Ghisallo Capital Management LLC800,000$8.3M0.37%Share
9LMR Partners LLP850,000$8.0M0.02%Share
10Governors Lane LP758,617$7.9M0.47%Share
11METEORA CAPITAL, LLC718,433$7.4M0.62%Share
12Hudson Bay Capital Management LP700,000$7.0M0.02%Share
13Alberta Investment Management Corp750,000$7.0M0.02%Share
14TWO SIGMA INVESTMENTS, LP725,000$7.0M0.01%Share
15Radcliffe Capital Management, L.P.658,322$6.8M0.37%Share
16Sculptor Capital LP600,646$6.0M0.06%Share
17DRIEHAUS CAPITAL MANAGEMENT LLC573,083$5.9M0.04%Share
18PICTON MAHONEY ASSET MANAGEMENT500,000$5.0M0.04%Share
19Jain Global LLC500,000$5.0M0.02%Share
20MOORE CAPITAL MANAGEMENT, LP450,000$4.7M0.07%Share
21PERISCOPE CAPITAL INC.448,100$4.6M0.53%Share
22RIVERNORTH CAPITAL MANAGEMENT, LLC447,750$4.6M0.22%Share
23COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS400,000$4.0M0.02%Share
24WOLVERINE ASSET MANAGEMENT LLC355,354$3.7M0.03%Share
25Mint Tower Capital Management B.V.300,000$3.1M0.36%Share
26MIZUHO SECURITIES USA LLC303,827$3.0M0.05%Share
27GOLDMAN SACHS GROUP INC323,854$3.0M0.00%Share
28MILLENNIUM MANAGEMENT LLC307,985$3.0M0.00%Share
29Centiva Capital, LP285,515$3.0M0.02%Share
30Shaolin Capital Management LLC270,783$2.8M0.09%Share
31ARISTEIA CAPITAL, L.L.C.250,000$2.6M0.06%Share
32WHITEBOX ADVISORS LLC250,000$2.6M0.04%Share
33BERKLEY W R CORP228,206$2.4M0.11%Share
34OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)200,000$2.1M0.24%Share
35L1 Global Manager Pty Ltd200,000$2.1M1.36%Share
36DLD Asset Management, LP200,000$2.1M0.15%Share
37Verition Fund Management LLC231,470$2.0M0.01%Share
38Schonfeld Strategic Advisors LLC173,515$1.8M0.01%Share
39Mint Tower Capital Management B.V.150,000$1.6M0.18%Share
40READYSTATE ASSET MANAGEMENT LP147,534$1.5M0.06%Share
41MMCAP International Inc. SPC125,000$1.3M0.13%Share
42GRITSTONE ASSET MANAGEMENT LLC99,081$1.0M0.98%Share
43TORONTO DOMINION BANK150,002$1.0M0.00%Share
44JPMORGAN CHASE & CO100,000$1.0M0.00%Share
45Harraden Circle Investments, LLC1,734,715$952K0.17%Share
46K2 PRINCIPAL FUND, L.P.87,900$910K0.07%Share
47Westchester Capital Management, LLC64,667$669K0.03%Share
48CSS LLC/IL57,143$592K0.03%Share
49LINDEN ADVISORS LP860,962$460K0.00%Share
50TENOR CAPITAL MANAGEMENT Co., L.P.750,000$411K0.01%Share

ATII Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 202557$230.5M+7
Q3 202550$203.8B+4
Q2 202546$194.7B+2
Q1 202544$180.1B—

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As of Q4 2025, 50 institutional investors hold ATII (Archimedes Tech SPAC Partners II Co. Ordinary Shares). The largest holder is TENOR CAPITAL MANAGEMENT Co., L.P. with $15.5M in shares. This quarter, 7 institutions opened new positions and 0 closed their positions.

Frequently Asked Questions

How many hedge funds own ATII?

As of Q4 2025, 50 institutional investors report holding ATII (Archimedes Tech SPAC Partners II Co. Ordinary Shares) in their 13F filings.

Who is the largest institutional holder of ATII?

The largest institutional holder of ATII is TENOR CAPITAL MANAGEMENT Co., L.P. with $15.5M in shares.

Is institutional ownership of ATII increasing or decreasing?

This quarter, 7 institutions opened new positions in ATII and 0 closed their positions.