Equillium, Inc. (EQ)

Nasdaq: EQ · Pharmaceutical Preparations · La Jolla, CA · filing with the SEC since 2018

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Grade5.9

◀ Past 5.1● Present 5.9▶ Future 6.7

3 est.

Overview Business Financials Grade Forecast Sentiment Ownership People Filings Patents Chart

Who owns Equillium, Inc.

As filed with the SEC

Holders of 5% or more

Janus Henderson Group PLC holds 9.99% of Common Stock, as its SCHEDULE 13G/A filed Feb 6, 2026 says.

Directors and officers

report now, of 16 people on the record since 2018. Their holdings as a group are not read here.

Institutions as a whole

n/a

The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 8 named at left.

Holders of 5% or moreshare of the class, as filed

Janus Henderson Group PLC

SCHEDULE 13G/A · filed Feb 6, 2026 · Common Stock · 9.99% in Dec 8, 2025

9.99%

ADAR1 Capital Management, LLC

SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.0001 per share · 9.9% in Nov 14, 2025

9.9%

RA Capital Management, L.P.

SCHEDULE 13G · filed Mar 20, 2026 · Common Stock, par value $0.0001 per share

9.9%

Xiangmin Cui

SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.001 per share

8.9%

Adage Capital Management, L.P.

SCHEDULE 13G/A · filed Aug 12, 2026 · Common Stock, par value $0.0001 per share · 9.99% in Nov 13, 2025

7.25%

Affinity Asset Advisors, LLC

SCHEDULE 13G · filed Aug 13, 2026 · Common Stock, par value $0.0001 per share

6.5%

Woodline Partners LP

SCHEDULE 13G · filed Nov 14, 2025 · Common Stock, par value $0.0001 per share

5.9%

Aberdeen Group plc

SCHEDULE 13G · filed May 7, 2026 · Common Stock, $0.0001 Par Value

5.3%

What EQ reports owning in othersstakes of 5% or more, and other ties

3 subsidiaries in 2 countries, from the list filed with the 10-K filed Mar 25, 2026.

Insider tradesForm 4

20sales

0purchases

18sales on a scheduled plan

3people selling

$2.8Msold, in dollars

$0bought, in dollars

Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.

By calendar yearSoldBought

19202122242526

2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.

People who traded in the window3 of 20 on the roster

Person	Role as filed	Sales	Sold	On a plan	Bought
Zedelmayer Christine	Sr. Vice President and COO	16	$1.8M	16	$0
Connelly Stephen	President and CSO	2	$700,000	0	$0
Tom Penny	Principal Accounting Officer	2	$200,000	2	$0

SI Assistanton EQ · research, not advice