Archimedes Tech SPAC Partners III Co.
ARCIW- Exchange
- Nasdaq
- Industry
- Blank Checks
- SEC CIK
- 0002083910
No open-market purchases or sales by Archimedes Tech SPAC Partners III Co. insiders were filed in the last 90 days; 41 institutions reported holding it in 13F filings for Q2 2026, worth $3.46M 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, +12 vs. previous quarter
- 41
- 13F valueReported value at the end of Q2 2026
- $3.46M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding ARCIW, Q2 2026
No superinvestor reported holding ARCIW at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Archimedes Tech SPAC Partners III Co. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jan 26, 2026 (view filing) | Jan 26 | Same day | Archimedes Tech SPAC Sponsors III LLC10% Owner | PPurchase | +390.0K | – | – | New position390.0K after | Duplicate filing |
| Jan 26, 2026 (view filing) | Jan 26 | Same day | Archimedes Tech SPAC Sponsors III LLC10% Owner | PPurchase | +97.5K | – | – | –97.5K after | DerivativeDuplicate filing |
| Jan 26, 2026 (view filing) | Jan 26 | Same day | Long LongChief Executive Officer | PPurchase | +390.0K | – | – | New position390.0K after | |
| Jan 26, 2026 (view filing) | Jan 26 | Same day | Long LongChief Executive Officer | PPurchase | +97.5K | – | – | –97.5K after | Derivative |
Top 10 13F holders, Q2 2026
The largest institutional positions in Archimedes Tech SPAC Partners III Co. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Boothbay Fund Management, LLC | 25,000 | $250.3K | 0.00% | +25,000 | New |
| Centiva Capital, LP | 324,439 | $243.3K | 0.01% | +324,439 | New |
| Magnetar Financial LLC | 300,000 | $225.0K | 0.00% | 00.0% | Unchanged |
| Linden Advisors LP | 299,999 | $187.6K | 0.00% | 00.0% | Unchanged |
| Tenor Capital Management Co., L.P. | 250,000 | $187.5K | 0.00% | 00.0% | Unchanged |
| Alberta Investment Management Corp | 250,000 | $187.5K | 0.00% | +250,000 | New |
| Governors Lane LP | 250,000 | $156.4K | 0.02% | 00.0% | Unchanged |
| K2 Principal Fund, L.P. | 308,837 | $154.4K | 0.01% | +27,060+9.6% | Added |
| Adage Capital Partners GP, L.L.C. | 200,000 | $150.0K | 0.00% | −175,000−46.7% | Reduced |
| Sona Asset Management (US) LLC | 200,000 | $150.0K | 0.01% | 00.0% | Unchanged |