Archimedes Tech SPAC Partners II Co. - COMMON-STOCK (ATII)

CUSIP: G04537109

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class
Equity / COMMON-STOCK
Total 13F shares
22,015,854
Total 13F value
$224,953,929
Holder snapshot 6 signals
Share change
+900,760
SEC-reported price per share
$10.21
Number of holders
46
Value change
+$9,215,998
Number of buys
9
Number of sells
11
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
29,602,835

Security key

G04537109

Report period

Q3 2025

Institutions

46

Top holders

10

ATII full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 Archimedes Tech SPAC Partners II Co. SEC filings Archimedes Tech SPAC Partners II Co. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of ATII - Archimedes Tech SPAC Partners II Co. - COMMON-STOCK (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
TENOR CAPITAL MANAGEMENT ...
Disclosed value leader
TENOR CAPITAL MANAGEMENT ...
Comparable rows
15/15
Latest evidence
30 Jun 2025
13F 13D/G Lead comparable stake: 5.1% 13D/G row: TENOR CAPITAL MANAGEMENT Co., L.P. Showing 1-6 of 15 holder rows.

Quick read

TENOR CAPITAL MANAGEMENT Co., L.P. leads the comparable SEC ownership view at 5.1%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens TENOR CAPITAL MANAGEMENT Co., L.P.'s linked filing trail.
Comparable ownership Top 5
TENOR CAPITAL MANAGEMENT Co., L.P. 5.1%
Sculptor Capital LP 4.4%
Ghisallo Capital Management LLC 2.7%
TWO SIGMA INVESTMENTS, LP 2.4%
MILLENNIUM MANAGEMENT LLC 1.7%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
TENOR CAPITAL MANAGEMENT Co., L.P.
13F 13D/G
Company · Tenor Capital Management Company, L.P.
13F 13D/G
5.1%
from 13D/G
$15,649,500
2,250,000 shares
mixed-class rows
 — 30 Jun 2025
Sculptor Capital LP
13D/G 13F
Company
13D/G 13F
4.4%
$13,585,000
1,300,000 shares
 $0 30 Jun 2025
Ghisallo Capital Management LLC
13F
Company
13F
2.7%
$8,184,000
800,000 shares
 — 30 Jun 2025
TWO SIGMA INVESTMENTS, LP
13F
Company
13F
2.4%
$7,416,750
725,000 shares
 — 30 Jun 2025
MILLENNIUM MANAGEMENT LLC
13F
Company
13F
1.7%
$5,152,500
500,000 shares
 — 30 Jun 2025
Jain Global LLC
13F
Company
13F
1.7%
$5,115,000
500,000 shares
 — 30 Jun 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
46
Shares
22,015,854
Rows available
46
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2025 vs Q1 2026 Across Filers

Q1 2026 holders
54
Q3 2025 holders
46
Holder diff
-8
Investor Q1 2026 Shares Q3 2025 Shares Share Diff Share Chg % Q1 2026 value Q3 2025 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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