Archimedes Tech SPAC Partners II Co.
ATIIU- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002028516
No open-market purchases or sales by Archimedes Tech SPAC Partners II Co. insiders were filed in the last 90 days; 4 institutions reported holding it in 13F filings for Q2 2026, worth $1.32M in total; no superinvestor holds it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, −1 vs. previous quarter
- 4
- 13F valueReported value at the end of Q2 2026
- $1.32M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding ATIIU, Q2 2026
No superinvestor reported holding ATIIU at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Archimedes Tech SPAC Partners II Co. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Feb 12, 2025 (view filing) | Feb 12 | Same day | Archimedes Tech SPAC Sponsors II LLC10% Owner | PPurchase | +530.0K | – | – | +9.2%6.28M after | Duplicate filing |
| Feb 12, 2025 (view filing) | Feb 12 | Same day | Archimedes Tech SPAC Sponsors II LLC10% Owner | PPurchase | +265.0K | – | – | –265.0K after | DerivativeDuplicate filing |
| Feb 12, 2025 (view filing) | Feb 12 | Same day | Long LongChief Executive Officer | PPurchase | +530.0K | – | – | +9.2%6.28M after | |
| Feb 12, 2025 (view filing) | Feb 12 | Same day | Long LongChief Executive Officer | PPurchase | +265.0K | – | – | –265.0K after | Derivative |
Top 10 13F holders, Q2 2026
The largest institutional positions in Archimedes Tech SPAC Partners II Co. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| JPMorgan Chase & Co | 49,000 | $587.5K | 0.00% | −1,000−2.0% | Reduced |
| Jane Street Group, LLC | 45,049 | $533.4K | 0.00% | −1,011−2.2% | Reduced |
| Clear Street Group Inc. | 14,164 | $169.8K | 0.00% | +4,164+41.6% | Added |
| UBS Group AG | 2,152 | $25.2K | 0.00% | −175−7.5% | Reduced |