Equillium, Inc. — Director's Dealing 2025

Dec 23, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Equillium, Inc. (EQ)
CIK: 0001746466
Period of Report: 2025-12-23

Reporting Person: Zedelmayer Christine (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-12-23	Common Stock	M	100000	$0.785	Acquired	191444	Direct
2025-12-23	Common Stock	S	100000	$1.50	Disposed	91444	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-12-23	Employee Stock Option (right to buy)	$0.785	M	100000	Disposed	2031-01-03	Common Stock (100000)	Direct

Footnotes

F1: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025.

F2: 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.