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LONA SCHEDULE 13G: SEC filing

Spruce Street Capital LP

Filed with the SEC on · accession 0000902664-26-004525

LONA filed a SCHEDULE 13G (schedule 13g) with the SEC on Nov 13, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -7.0% by the first close after the filing.

Summary of the filing

Spruce Street Capital LP filed a Schedule 13G reporting beneficial ownership of 393,700 shares (4.2%) of LeonaBio, Inc. as of the filing date, down from a potential 9.99% as of September 30, 2026, after 639,763 warrants expired unexercised on October 18, 2026.

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Key details

Shares of common stock beneficially owned as of filing date$394K
Shares of common stock potentially beneficially owned as of September 30, 2026 (including warrants)$1.0M
Shares issuable upon exercise of warrants that expired unexercised on October 18, 2026$640K
Reporting person / investment manager holding 4.2% of leonabio common stockSpruce Street Capital LP
Issuer of the securities (formerly athira pharma, inc.)LeonaBio, Inc.
Co-managing member of spruce street capital gp llcAlex R. Rosen
Co-managing member of spruce street capital gp llcSimon Basseyn

How LONA stock reacted

Close before

$3.73

Nov 12, 2026

First close after

-6.97%

$3.47

5 trading days

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Since filing

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Frequently asked questions

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

LONA filed a SCHEDULE 13G (SEC filing). Spruce Street Capital LP filed a Schedule 13G reporting beneficial ownership of 393,700 shares (4.2%) of LeonaBio, Inc. as of the filing date, down from a potential 9.99% as of September 30, 2026, after 639,763 warrants expired unexercised on October 18, 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 LONA stock react to this filing?

LONA closed at $3.73 before the filing and $3.47 on Nov 13, 2026 (-6.97%).

Other LONA SEC filings

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