Security key
G04537117
Archimedes Tech SPAC Partners II Co. - Ordinary shares, $0.0001 Par Value (ATIIU)
CUSIP: G04537117
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Ordinary shares, $0.0001 Par Value
- Total 13F shares
- 1,303,365
- Total 13F value
- $13,390,167
- Share change
- -17,346,775
- SEC-reported price per share
- $10.30
- Number of holders
- 9
- Value change
- -$175,139,846
- Number of buys
- 2
- Number of sells
- 38
- Shares outstanding
- 29,411,765
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
9
Top holders
9
ATIIU full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Archimedes Tech SPAC Partners II Co. SEC filings
Archimedes Tech SPAC Partners II Co. company facts
Broader feeds
Reporting periods
Holder history for CUSIP G04537117
Recent filing periods:
Ownership snapshot
Top reported holders of ATIIU - Archimedes Tech SPAC Partners II Co. - Ordinary shares, $0.0001 Par Value (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
Sculptor Capital LP
Disclosed value leader
TENOR CAPITAL MANAGEMENT ...
Comparable rows
15/15
Latest evidence
30 Jun 2025
13D/G
13F
Lead comparable stake: 4.4%
13D/G row: Sculptor Capital LP
Showing 1-6 of 15 holder rows.
Quick read
Sculptor Capital LP leads the comparable SEC ownership view at 4.4%.
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 Sculptor Capital LP's linked filing trail.
Comparable ownership
Top 5
Sculptor Capital LP
4.4%
TENOR CAPITAL MANAGEMENT Co., L.P.
5.1%
AQR Arbitrage LLC
4.4%
Magnetar Financial LLC
4.4%
HEALTHCARE OF ONTARIO PENSION PLA...
3.4%
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 |
|---|---|---|---|---|---|
| Sculptor Capital LP |
13D/G
|
4.4%
|
$13,585,000
1,300,000 shares
|
$0 | 30 Jun 2025 |
| TENOR CAPITAL MANAGEMENT Co., L.P. |
13F
Company
|
5.1%
|
$15,150,000
1,500,000 shares
|
— | 31 Mar 2025 |
| AQR Arbitrage LLC |
13F
Company
|
4.4%
|
$13,136,679
1,303,242 shares
|
— | 31 Mar 2025 |
| Magnetar Financial LLC |
13F
Company
|
4.4%
|
$13,117,000
1,300,000 shares
|
— | 31 Mar 2025 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND |
13F
Company
|
3.4%
|
$10,100,000
1,000,000 shares
|
— | 31 Mar 2025 |
| LINDEN ADVISORS LP |
13F
Company
|
3.4%
|
$10,090,000
1,000,000 shares
|
— | 31 Mar 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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
9
Shares
1,303,365
Rows available
9
| 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 Q2 2025 vs Q4 2025 Across Filers
Q4 2025 holders
4
Q2 2025 holders
9
Holder diff
5
| Investor | Q4 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q4 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend