Christine Zedelmayer - 09 Mar 2026 Form 4 Insider Report for Equillium, Inc. (EQ)

Role
Sr. Vice President and COO
Signature
/s/ Christine Zedelmayer
Issuer symbol
EQ
Transactions as of
09 Mar 2026
Net transactions value
-$362,438
Form type
4
Filing time
11 Mar 2026, 20:11:26 UTC
Previous filing
11 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Zedelmayer Christine Sr. Vice President and COO 2223 AVENIDA DE LA PLAYA, SUITE 105, LA JOLLA /s/ Christine Zedelmayer 10 Mar 2026 0001797818

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction EQ Common Stock Options Exercise +35,695 +39% $0.7850* 127,139 09 Mar 2026 Direct
transaction EQ Common Stock Options Exercise +41,666 +33% $0.7850* 168,805 09 Mar 2026 Direct
transaction EQ Common Stock Options Exercise +75,000 +44% $0.7850* 243,805 09 Mar 2026 Direct
transaction EQ Common Stock Sale $362,438 -181,219 -74% $2.00 62,586 09 Mar 2026 Direct F1, F2

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) Options Exercise -35,695 -100% $0.000000* 0 09 Mar 2026 Common Stock 35,695 $0.7850 Direct F3
transaction EQ Employee Stock Option (right to buy) Options Exercise -41,666 -100% $0.000000* 0 09 Mar 2026 Common Stock 41,666 $0.7850 Direct F3
transaction EQ Employee Stock Option (right to buy) Options Exercise -75,000 -100% $0.000000* 0 09 Mar 2026 Common Stock 75,000 $0.7850 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
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 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.00 to $2.015, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.
F3 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.