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PMN SCHEDULE 13G: SEC filing

Adage Capital Management, L.P.

Filed with the SEC on · accession 0000919574-26-007569

PMN filed a SCHEDULE 13G (schedule 13g) with the SEC on Nov 12, 2026. Adage Capital Management, L.P. filed a Schedule 13G reporting beneficial ownership of 703,550 common shares of ProMIS Neurosciences Inc., representing 7.73% of the outstanding shares, including 139,275 shares issuable upon exercise of warrants. The stock moved -7.4% by the first close after the filing.

Summary of the filing

Adage Capital Management, L.P. filed a Schedule 13G reporting beneficial ownership of 703,550 common shares of ProMIS Neurosciences Inc., representing 7.73% of the outstanding shares, including 139,275 shares issuable upon exercise of warrants. The filing is a passive investment disclosure under Rule 13d-1(b).

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Key details

Common shares beneficially owned$704K
Common shares issuable upon exercise of warrants$139K
Reporting person / investment managerAdage Capital Management, L.P.
IssuerProMIS Neurosciences Inc.
Managing member of adage capital advisors, l.l.c. and adage capital partners, l.l.c.Robert Atchinson
Managing member of adage capital advisors, l.l.c. and adage capital partners, l.l.c.Phillip Gross

How PMN stock reacted

Close before

$3.76

Nov 11, 2026

First close after

-7.45%

$3.48

5 trading days

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Since filing

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Frequently asked questions

What did PMN file with the SEC on Nov 12, 2026?

PMN filed a SCHEDULE 13G (SEC filing). Adage Capital Management, L.P. filed a Schedule 13G reporting beneficial ownership of 703,550 common shares of ProMIS Neurosciences Inc., representing 7.73% of the outstanding shares, including 139,275 shares issuable upon exercise of warrants. The filing is a passive investment disclosure under Rule 13d-1(b).

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 PMN stock react to this filing?

PMN closed at $3.76 before the filing and $3.48 on Nov 12, 2026 (-7.45%).

Other PMN SEC filings

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