Bruce D. Steel - 07 Jan 2026 Form 4 Insider Report for Equillium, Inc. (EQ)

Role: Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Bruce D. Steel
Issuer symbol: EQ
Transactions as of: 07 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Jan 2026, 17:38:50 UTC
Previous filing: 03 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Steel Bruce D.	Chief Executive Officer, Director, 10%+ Owner	2223 AVENIDA DE LA PLAYA, SUITE 105, LA JOLLA	/s/ Bruce D. Steel	09 Jan 2026	0001614997

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	EQ	Employee Stock Option (right to buy)	Award	$0	+1,750,000		$0.000000	1,750,000	07 Jan 2026	Common Stock	1,750,000	$1.31	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Twenty-five percent of the shares subject to the option vests on the first anniversary of the vesting commencement date, and the remainder vests in 36 equal monthly installments thereafter for the following three years.