Security key
G0453R113
Archimedes Tech SPAC Partners III Co. - *W EXP 01/23/203 (ARCIW)
CUSIP: G0453R113
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / *W EXP 01/23/203
- Total 13F shares
- 3,564,164
- Total 13F value
- $2,268,637
- Share change
- +3,564,164
- SEC-reported price per share
- $0.54
- Number of holders
- 28
- Value change
- +$2,268,637
- Number of buys
- 28
Report period
Q1 2026
Institutions
28
Top holders
10
ARCIW full security history
Ownership snapshot
Full 13F holder table
Archimedes Tech SPAC Partners III Co. SEC filings
Archimedes Tech SPAC Partners III Co. company facts
Broader feeds
Ownership snapshot
Top reported holders of ARCIW - Archimedes Tech SPAC Partners III Co. - *W EXP 01/23/203 (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
Adage Capital Management,...
Disclosed value leader
Adage Capital Management,...
Comparable rows
1/3
Latest evidence
31 Mar 2026
13D/G
3/4/5
Lead comparable stake: 5.1%
2 rows are not safely comparable across share classes.
13D/G row: Adage Capital Management, L.P.
Quick read
Adage Capital Management, L.P. leads the comparable SEC ownership view at 5.1%.
1 of 3 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 Adage Capital Management, L.P.'s linked filing trail.
Comparable ownership
Top 1
Adage Capital Management, L.P.
5.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-3 of 3 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Adage Capital Management, L.P. |
13D/G
|
5.1%
|
$17,730,000
1,800,000 shares
|
$0 | 31 Mar 2026 |
| Archimedes Tech SPAC Sponsors III LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
487,500 shares
mixed-class rows
|
— | 26 Jan 2026 |
| Long Long |
3/4/5
Chief Executive Officer, Director, 10%+ Owner
|
—
mixed-class rows
|
—
487,500 shares
mixed-class rows
|
— | 26 Jan 2026 |
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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
28
Shares
3,564,164
Rows available
28
| 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 Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
28
Q1 2026 holders
28
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|