Latest Period
Q2 2026
Security Snapshot
Archimedes Tech SPAC Partners II Co. - Ordinary shares, $0.0001 Par Value (ATIIU) Institutional Ownership
CUSIP: G04537117
13F Institutional Holders and Ownership History from Q1 2025 to Q2 2026
Institutions Reporting
4
Shares (Excl. Options)
110,365
Price
$11.92
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- Security type / class
- Equity / Ordinary shares, $0.0001 Par Value
- Symbol
- ATIIU on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 110,365
- Total 13F value
- $1,315,894
- Portfolio coverage rank
- 0%
- Share change
- +1,978
- Value change
- +$23,919
- Number of holders
- 4
- Shares outstanding
- 29,735,435
- SEC-reported price per share
- $11.48
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ATIIU - Archimedes Tech SPAC Partners II Co. - Ordinary shares, $0.0001 Par Value is tracked under CUSIP G04537117.
- 4 institutions reported positions in Q2 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 4 to 4 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $1,180,534 to $1,315,894.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 4 institutions filings for Q2 2026.
Security key
G04537117
Latest holder period
Q2 2026
13F holders
4
13D/G owners
2
CIK / CUSIP context first
Open Q2 2026 holders
ATIIU full holder history
Archimedes Tech SPAC Partners II Co. SEC filings
Archimedes Tech SPAC Partners II Co. company facts
Archimedes Tech SPAC Partners II Co. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G04537117:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
ATIIU
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| TENOR CAPITAL MANAGEMENT Co., L.P. | 4.6% | -10% | $16,003,611 | -$1,546,389 | 1,367,830 | -8.8% | Tenor Capital Management Company, L.P. | 30 Jun 2026 |
| Sculptor Capital LP | 4.4% | -13% | $13,585,000 | 1,300,000 | 0% | Sculptor Capital LP | 30 Jun 2025 |
As of 30 Jun 2026, 4 institutional investors reported holding 110,365 shares of Archimedes Tech SPAC Partners II Co. - Ordinary shares, $0.0001 Par Value (ATIIU). This represents 0.37% of the company’s total 29,735,435 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
6
Latest
Q2 2026
Rows shown
1-6 of 6
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 110,365 | $1,315,894 | +$23,919 | $11.92 | 4 |
| 2026 Q1 | 108,387 | $1,180,534 | -$1,268,803 | $10.90 | 4 |
| 2025 Q4 | 224,854 | $2,373,823 | -$958,921 | $10.54 | 4 |
| 2025 Q3 | 318,483 | $3,463,829 | -$10,304,352 | $11.44 | 6 |
| 2025 Q2 | 1,303,365 | $13,390,167 | -$175,139,846 | $10.30 | 9 |
| 2025 Q1 | 19,250,140 | $194,106,135 | +$194,106,135 | $10.08 | 44 |