ARCIW · Archimedes Tech SPAC Partners III Co. · Shareholders & Ownership
Market Cap
$354.03M
Shares
35.26M
Volume · Oct 26
272
Avg daily vol (3M)
14.28K
Every disclosed holder of ARCIW in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns ARCIW
13F quarter Jun 30, 2026; this listing alone: insiders and shares outstanding are issuer-wide, so they are left outNo chart: shares outstanding cannot be set against these holders.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 4,659,293 | — |
| Insiders (Forms 3, 4, 5) | 0 | — |
| 13D/G-only blocks | 0 | — |
| Registered funds (N-PORT, not summed) | 0 | — |
% Out is unavailable: shares outstanding is an issuer-wide count, not one listing's.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of ARCIW
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
Centiva Capital, LP
13F
CIK 1692507 · Registered investment adviser · Jun 30, 2026
|
324,439 | ||
| 2 |
K2 PRINCIPAL FUND, L.P.
13F
CIK 1461790 · Unknown · Jun 30, 2026
|
308,837 | ||
| 3 |
Magnetar Financial LLC
13F
CIK 1352851 · Registered investment adviser · Jun 30, 2026
|
300,000 | ||
| 4 |
Linden Advisors LP
13F
CIK 1279396 · Registered investment adviser · Jun 30, 2026
|
299,999 | ||
| 5 |
Alberta Investment Management Corp
13F
CIK 1463559 · Non-US institution · Jun 30, 2026
|
250,000 | ||
| 6 |
Governors Lane LP
13F
CIK 1644187 · Registered investment adviser · Jun 30, 2026
|
250,000 | ||
| 7 |
TENOR CAPITAL MANAGEMENT Co., L.P.
13F
CIK 1346554 · Registered investment adviser · Jun 30, 2026
|
250,000 | ||
| 8 |
ADAGE CAPITAL PARTNERS GP, L.L.C.
13F
CIK 1165408 · Registered investment adviser · Jun 30, 2026
|
200,000 | ||
| 9 |
SONA ASSET MANAGEMENT (US) LLC
13F
CIK 1856405 · Registered investment adviser · Jun 30, 2026
|
200,000 | ||
| 10 |
AQR Arbitrage LLC
13F
CIK 1167456 · Registered investment adviser · Jun 30, 2026
|
189,403 | ||
| 11 |
Verition Fund Management LLC
13F
CIK 1454027 · Registered investment adviser · Jun 30, 2026
|
187,200 | ||
| 12 |
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
13F
CIK 1535845 · Non-US institution · Jun 30, 2026
|
137,500 | ||
| 13 |
Polar Asset Management Partners Inc.
13F
CIK 1326389 · Registered investment adviser · Jun 30, 2026
|
129,300 | ||
| 14 |
MOORE CAPITAL MANAGEMENT, LP
13F
CIK 1448574 · Registered investment adviser · Jun 30, 2026
|
125,000 | ||
| 15 |
RIVERNORTH CAPITAL MANAGEMENT, LLC
13F
CIK 1447578 · Registered investment adviser · Jun 30, 2026
|
125,000 | ||
| 16 |
BNP PARIBAS ARBITRAGE, SA
13F
CIK 1166588 · Non-US institution · Jun 30, 2026
|
123,093 | ||
| 17 |
Shaolin Capital Management LLC
13F
CIK 1766806 · Registered investment adviser · Jun 30, 2026
|
114,720 | ||
| 18 |
D. E. Shaw & Co., Inc.
13F
CIK 1009207 · Unknown · Jun 30, 2026
|
106,250 | ||
| 19 |
Periscope Capital Inc.
13F
CIK 1695320 · Exempt reporting adviser · Jun 30, 2026
|
101,100 | ||
| 20 |
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS
13F
CIK 1083190 · Unknown · Jun 30, 2026
|
100,000 | ||
| 21 |
METEORA CAPITAL, LLC
13F
CIK 1905106 · Investment adviser · Jun 30, 2026
|
83,985 | ||
| 22 |
Radcliffe Capital Management, L.P.
13F
CIK 1218275 · Registered investment adviser · Jun 30, 2026
|
81,385 | ||
| 23 |
MMCAP International Inc. SPC
13F
CIK 1304857 · Unknown · Jun 30, 2026
|
75,000 | ||
| 24 |
HBK INVESTMENTS L P
13F
CIK 1011443 · Registered investment adviser · Jun 30, 2026
|
62,501 | ||
| 25 |
Clear Street Group Inc.
13F
CIK 1881567 · Unknown · Jun 30, 2026
|
55,206 | ||
| 26 |
683 Capital Management, LLC
13F
CIK 1404574 · Registered investment adviser · Jun 30, 2026
|
50,000 | ||
| 27 |
GLAZER CAPITAL, LLC
13F
CIK 1076809 · Registered investment adviser · Jun 30, 2026
|
50,000 | ||
| 28 |
Parallax Volatility Advisers, L.P.
13F
CIK 1521001 · Registered investment adviser · Jun 30, 2026
|
50,000 | ||
| 29 |
DLD Asset Management, LP
13F
CIK 1578299 · Registered investment adviser · Jun 30, 2026
|
42,499 | ||
| 30 |
Wealthspring Capital LLC
13F
CIK 1844495 · Registered investment adviser · Jun 30, 2026
|
40,870 | ||
| 31 |
Alpine Global Management, LLC
13F
CIK 1581655 · Unknown · Jun 30, 2026
|
40,200 | ||
| 32 |
Schonfeld Strategic Advisors LLC
13F
CIK 1665241 · Registered investment adviser · Jun 30, 2026
|
40,000 | ||
| 33 |
Mint Tower Capital Management B.V.
13F
CIK 1666606 · Unknown · Jun 30, 2026
|
37,500 | ||
| 34 |
PICTON MAHONEY ASSET MANAGEMENT
13F
CIK 1539041 · Non-US institution · Jun 30, 2026
|
37,499 | ||
| 35 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
|
25,000 | ||
| 36 |
Context Capital Management, LLC
13F
CIK 1301396 · Registered investment adviser · Jun 30, 2026
|
25,000 | ||
| 37 |
WHITEBOX ADVISORS LLC
13F
CIK 1257391 · Registered investment adviser · Jun 30, 2026
|
25,000 | ||
| 38 |
Bulldog Investors, LLP
13F
CIK 1504304 · Registered investment adviser · Jun 30, 2026
|
15,000 | ||
| 39 |
Arax Advisory Partners
13F
CIK 1586767 · Registered investment adviser · Jun 30, 2026
|
375 | ||
| 40 |
ROYAL BANK OF CANADA
13F
CIK 1000275 · Bank · Jun 30, 2026
|
375 | ||
| 41 |
UBS Group AG
13F
CIK 1610520 · Bank · Jun 30, 2026
|
57 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.