LPAAU SCHEDULE 13G/A: SEC filing

Magnetar Financial LLC and affiliated reporting persons

Filed with the SEC on · accession 0001104659-26-126734

LPAAU filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 13, 2026. Magnetar Financial LLC and affiliated reporting persons filed an amended Schedule 13G disclosing beneficial ownership of 250,000 Class A ordinary shares, or approximately 3.32%, of Launch One Acquisition Corp. as of September 30, 2026.

Summary of the filing

Magnetar Financial LLC and affiliated reporting persons filed an amended Schedule 13G disclosing beneficial ownership of 250,000 Class A ordinary shares, or approximately 3.32%, of Launch One Acquisition Corp. as of September 30, 2026. The filing is a passive investment disclosure and states the shares were not acquired for the purpose of changing or influencing control of the issuer.

Key details

Class A ordinary shares beneficially owned$250K
Percentage of class beneficially ownedPCT 3
IssuerLaunch One Acquisition Corp.
Reporting person / investment adviserMagnetar Financial LLC
Reporting person / parent holding companyMagnetar Capital Partners LP
Reporting person / general partnerSupernova Management LLC
Administrative manager of supernova management llcDavid J. Snyderman
Attorney-in-factHayley Stein

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Frequently asked questions

What did LPAAU file with the SEC on Nov 13, 2026?

LPAAU filed a SCHEDULE 13G/A (SEC filing). Magnetar Financial LLC and affiliated reporting persons filed an amended Schedule 13G disclosing beneficial ownership of 250,000 Class A ordinary shares, or approximately 3.32%, of Launch One Acquisition Corp. as of September 30, 2026. The filing is a passive investment disclosure and states the shares were not acquired for the purpose of changing or influencing control of the issuer.

How do I read a SCHEDULE 13G/A?

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/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

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