CXII SCHEDULE 13G: SEC filing

Magnetar Financial LLC and affiliated entities

Filed with the SEC on · accession 0001104659-26-095311

CXII filed a SCHEDULE 13G (schedule 13g) with the SEC on Aug 13, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +0.2% by the first close after the filing.

Summary of the filing

Magnetar Financial LLC and affiliated entities filed a Schedule 13G joint filing agreement disclosing a passive ownership position in Churchill Capital Corp XII as of June 30, 2026.

Key details

Reporting person / filerMagnetar Financial LLC
Reporting person / filerMagnetar Capital Partners LP
Reporting person / filerSupernova Management LLC
Issuer of securities ownedChurchill Capital Corp XII
Administrative manager of supernova management llcDavid J. Snyderman
Attorney-in-factHayley Stein

How CXII stock reacted

Close before

$10.73

Aug 12, 2026

First close after

+0.23%

$10.76

5 trading days

+0.65%

$10.80

Since filing

-3.54%

$10.35

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Frequently asked questions

What did CXII file with the SEC on Aug 13, 2026?

CXII filed a SCHEDULE 13G (SEC filing). Magnetar Financial LLC and affiliated entities filed a Schedule 13G joint filing agreement disclosing a passive ownership position in Churchill Capital Corp XII as of June 30, 2026.

How do I read a SCHEDULE 13G?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G (schedule 13g): A report the company filed with the SEC (the US market regulator).

How did CXII stock react to this filing?

CXII closed at $10.73 before the filing and $10.76 on Aug 14, 2026 (+0.23%). Five trading days later: $10.80 (+0.65%).

Other CXII SEC filings

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