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Archimedes Tech Spac Partners II (ATII): which funds own it

SPAC / vehículos(by SIC code, unreviewed)Data as of Jun 30, 2026 (Q2 2026) · updated on Nov 6, 2026

A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.

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Sections with a free account

1 concentrated manager holds it (+1 vs last quarter) with a median weight of 1.4%.

Who owns Archimedes Tech Spac Partners II?

As of Jun 30, 2026, the largest holders reported on Form 13F were Tenor Capital Management (1.4 million shares), Fort Baker Capital Management (1.3 million shares) and Magnetar Financial (1.3 million shares).

Which institutions hold the most Archimedes Tech Spac Partners II shares?

Per Form 13F filings as of Jun 30, 2026:

  1. 1. Tenor Capital Management: 1.4 million shares
  2. 2. Fort Baker Capital Management: 1.3 million shares
  3. 3. Magnetar Financial: 1.3 million shares
  4. 4. D. E. Shaw: 1.1 million shares
  5. 5. Decagon Asset Management LLP: 937,829 shares
  6. 6. Linden Advisors: 848,273 shares
  7. 7. Ghisallo Capital Management: 800,000 shares
  8. 8. Two Sigma Investments: 725,000 shares
  9. 9. Hudson Bay Capital Management: 700,000 shares
  10. 10. Shay Capital: 623,687 shares

Sources:All of the company's proxy statements on EDGAR ↗

We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.

Concentrated managers
1
All 13F: 52
Consensus
—
No score: it needs 5 or more concentrated managers
Price at Jun 30, 2026 (per 13F)
$10.78
+3.6% in the quarter · reported value ÷ shares, not the quote · See current quote ↗

Quarter flow (concentrated managers)

Change in managers (0 → 1): 1 opened · 0 exited = +1

Net flow in the quarter: +$14.3M (+1.3 M shares) · bought $14.3M and sold $0Shares concentrated managers added minus those they cut, valued at the 13F quarter-end implied price, not each trade's price. It is a different measure from the change in managers: the two can have opposite signs.

Concentrated managers holding it

Up to 15, sorted by position value. The percentage is the weight in each manager's portfolio.

Largest holders of ATII (all 13F filers)

The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.

Fundamentals

12-month figures to Jun 30, 2026 · balance sheet as of Jun 30, 2026.

Profitability
Operating margin
—
Net margin
—
ROE
—
Growth
Revenue (TTM)
—
Revenue growth
—
Net income (TTM)
$-131M
Balance sheet
Net debt / EBITDA
—
Free cash flow (TTM)
—
Quality vs sector
—

This company's sector comes from its SIC code, unreviewed, or has too few comparable companies: we do not compare it with its sector.

Figures from the statements the company filed with the SEC (10-K, 10-Q). Free cash flow = operating cash flow − capital expenditures; empty if the company does not report capex. “Quality vs sector”: 0 to 100, the average of its percentiles in ROE, operating margin, free-cash-flow margin, revenue and earnings growth and net debt / EBITDA (at least 3 needed) against companies in its sector above $300M. How each figure is calculated

Earnings quality and debt

Operating cash flow ÷ net income (12 months)
no datanot calculated with negative net income
Interest coverage (operating income ÷ interest)
no data
Debt due within 12 months
no data

From the figures the company filed with the SEC. Cash flow over net income near or above 1 means earnings are collected in cash; far below, that part is accounting. Coverage says how many times operating income pays the latest fiscal year's interest. Maturities come from the debt note of the latest annual report, counted from its closing date. “No data” never means zero.

Insiders (Form 4)

Officers and directors who bought (6 m)
no data
Amount (6 m)
no data
CEO/CFO bought (12 m)
No

Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.

Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →

Above 5% (13D/13G)

Disclosed stakes, with their amendments. A filing is not always a purchase: there are also reductions and changes of filing entity.

This list may be incomplete: we hold 13D and 13G filings made since Dec 23, 2024. A holder above 5% that has not filed anything since then is not shown here.

Above 5% over time (13D/13G)

Each holder with its filings in order. History since December 2024.

Flagged material events (8-K)

  • Jul 14, 2026Routinefiling ↗

    Unregistered sale of equity securities (Item 3.02)

    «Forge Nano Secures Additional $23 Million in PIPE Financing at $10.00 Per Share, Closes Series D with Samsung Investment Ahead of Public Listing»

  • Apr 20, 2026Routinefiling ↗

    Unregistered sale of equity securities (Item 3.02)

Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.

All material events (8-K)

Earnings, agreements, financing, management changes and announcements from the last year, with a filter by type and a link to each filing.

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