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Archimedes Tech SPAC Partners II Co. Unit (ATIIU) institutional ownership

Latest close $11.47 Jul 22, 2026
Market cap$281M 52-week range SectorFinancial Services
Funds holding · Q1 2026
4
reported ATIIU position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
1 buyers · 3 sellers

Archimedes Tech SPAC Partners II Co. Unit (ATIIU) price and institutional activity

Dates

Q1 2026

$0 bought by 1 investors
Glazer Capital, LLC
$0 sold by 3 investors
Clear Street Group Inc.JPMorgan Chase & Co +1 more
Bought Sold Totals per quarter; hover a bar for the names.

Archimedes Tech SPAC Partners II Co. Unit (ATIIU) institutional activity · 4

Investor Type Est. change Change Δ Own Date
Clear Street Group Inc. · Reduced
Change −65K Date Q1 2026
Clear Street Group Inc. Reduced· Q1 2026 −65K Q1 2026
JPMorgan Chase & Co · Reduced
Change −50K Date Q1 2026
JPMorgan Chase & Co Reduced· Q1 2026 −50K Q1 2026
UBS Group AG · Reduced
Change −2K Date Q1 2026
UBS Group AG Reduced· Q1 2026 −2K Q1 2026
Glazer Capital, LLC · New
Change +1 Date Q1 2026
Glazer Capital, LLC New· Q1 2026 +1 Q1 2026
Data through Q1 2026 · filed May 15, 2026
4 of 4

Archimedes Tech SPAC Partners II Co. Unit (ATIIU) activist and large shareholders

Dates
No Schedule 13D or 13G filing is available for ATIIU in this range.

Archimedes Tech SPAC Partners II Co. Unit (ATIIU) ownership FAQ

Who owns ATIIU?

4 reporting institutions disclosed ATIIU position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.