Archimedes Tech SPAC Partners ATIIW Institutional Ownership

NASDAQ ATIIW
$1.56 +0.06 (+3.99%)
As of: Aug 21, 2026 · 3:58 PM EDT

Institutions by Trading Activity

38 Institutions
Increased 8 21.1%
Unchanged 24 63.2%
Reduced 6 15.8%

Ownership Statistics

13F · as of 31 Mar, 2026
Institutional Ownership
50.56%
-1.59 pp QoQ
Shares Held by Institutions
10.26Mn
of 20.29Mn outstanding
+1.30% QoQ
Shares Outstanding
20.29Mn
10.03Mn held outside 13F filers
Institutional Investors
38
filed 13F for Mar 2026
+2 vs prior quarter
Net Shares Added (QoQ)
+131.39K
accumulated since last quarter
Value of Holdings
$14.77Mn
reported market value

Shares Owned by Institutions

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Institutions

Accumulated Distributed
Latest quarter
Net over range
Accumulating quarters

Ownership Summary

Quarter ending 31 Mar, 2026

Archimedes Tech SPAC Partners II Co. (NASDAQ:ATIIW) has 38 institutional investors that have filed 13F reports for the period ending March 2026.

Form 13F Holdings

38 Institutional Holders

Report period 31 Mar, 2026
Total shares held 10.26Mn
Of outstanding 50.56%
Download Data
# Institution CIK Shares Held % of Outstanding Change (QoQ) Change (%) Value (USD)
1 Harraden Circle Investments, LLC 0001910592 1,609,715 7.93% 125,000 -7.21% $820.96K
2 LINDEN ADVISORS LP 0001279396 860,962 4.24% 0 0.00% $378.82K
3 TENOR CAPITAL MANAGEMENT Co., L.P. 0001346554 750,000 3.70% 0 0.00% $382.50K
4 Magnetar Financial LLC 0001352851 650,000 3.20% 0 0.00% $331.50K
5 Toronto Dominion Bank 0000947263 554,674 2.73% 515,405 +1,312.50% $282.88K
6 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0001535845 500,000 2.46% 0 0.00% $255.00K
6 Shaolin Capital Management LLC 0001766806 500,000 2.46% 0 0.00% $255.00K
7 CSS LLC/IL 0001103646 487,619 2.40% 52,807 -9.77% $248.69K
8 AQR Arbitrage LLC 0001167456 479,208 2.36% 10,483 -2.14% $244.40K
9 LMR Partners LLP 0001578621 425,000 2.09% 0 0.00% $216.75K
10 Alberta Investment Management Corp 0001463559 375,000 1.85% 375,000 -50.00% $191.25K
11 D. E. Shaw & Co., Inc. 0001009207 287,500 1.42% 0 0.00% $146.63K
12 K2 PRINCIPAL FUND, L.P. 0001461790 239,895 1.18% 239,895 0.00% $122.35K
13 MOORE CAPITAL MANAGEMENT, LP 0001448574 225,000 1.11% 0 0.00% $114.75K
14 RIVERNORTH CAPITAL MANAGEMENT, LLC 0001447578 224,942 1.11% 0 0.00% $114.72K
15 Westchester Capital Management, LLC 0001512805 199,999 0.99% 0 0.00% $102.00K
16 PERISCOPE CAPITAL INC. 0001695320 198,600 0.98% 0 0.00% $101.29K
17 Governors Lane LP 0001644187 197,403 0.97% 0 0.00% $100.68K
18 BNP PARIBAS FINANCIAL MARKETS 0001166588 161,927 0.80% 0 0.00% $82.58K
19 Clear Street Group Inc. 0001881567 153,619 0.76% 40,379 +35.66% $78.35K