Bruce D. Steel - Aug 29, 2025 Form 4 Insider Report for Equillium, Inc. (EQ)

Role: President and CEO, Director, 10%+ Owner
Signature: /s/ Bruce D. Steel
Stock symbol: EQ
Transactions as of: Aug 29, 2025
Transactions value $: $0
Form type: 4
Date filed: 9/3/2025, 04:59 PM
Previous filing: Feb 19, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Steel Bruce D.	President and CEO, Director, 10%+ Owner	2223 AVENIDA DE LA PLAYA, SUITE 105, LA JOLLA	/s/ Bruce D. Steel	2025-09-02	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	+1.7M		$0.00	1.7M	Aug 29, 2025	Common Stock	1.7M	$1.74	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.