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EQ SCHEDULE 13G/A: SEC filing

Adage Capital Management, L.P.

Filed with the SEC on · accession 0000919574-26-007564

EQ filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 12, 2026. Adage Capital Management, L.P. filed an amended Schedule 13G reporting beneficial ownership of 5.93% of Equillium, Inc.'s common stock, including shares issuable upon exercise of warrants. The stock moved -7.0% by the first close after the filing.

Summary of the filing

Adage Capital Management, L.P. filed an amended Schedule 13G reporting beneficial ownership of 5.93% of Equillium, Inc.'s common stock, including shares issuable upon exercise of warrants. The filing is a passive investment disclosure with no stated intent to influence control.

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Key details

Shares of common stock beneficially owned$4.0M
Shares of common stock issuable upon exercise of warrants$3.4M
Reporting person / investment managerAdage Capital Management, L.P.
IssuerEquillium, 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 EQ stock reacted

Close before

$1.42

Nov 11, 2026

First close after

-7.04%

$1.32

5 trading days

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Since filing

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Frequently asked questions

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

EQ filed a SCHEDULE 13G/A (SEC filing). Adage Capital Management, L.P. filed an amended Schedule 13G reporting beneficial ownership of 5.93% of Equillium, Inc.'s common stock, including shares issuable upon exercise of warrants. The filing is a passive investment disclosure with no stated intent to influence control.

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).

How did EQ stock react to this filing?

EQ closed at $1.42 before the filing and $1.32 on Nov 12, 2026 (-7.04%).

Other EQ SEC filings

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