Equillium Form 144 lists 30,975 shares to be sold

Equillium, Inc. submitted a Form 144 notice related to proposed sales of common stock by an affiliate.

Rhea-AI Filing Summary

Equillium, Inc. submitted a Form 144 notice related to proposed sales of common stock by an affiliate. The filing lists 30,975 shares in the "Securities To Be Sold" section and records a 200,000-share sale by Stephen Connelly on 06/04/2026 reported under "Securities Sold During The Past 3 Months." The broker listed is Jefferies LLC.

Insights

Equity Capital Markets Analyst

Form 144 shows proposed insider resale activity and a recent reported sale.

The filing identifies 30,975 shares under "Securities To Be Sold" and notes a prior reported sale of 200,000 shares by Stephen Connelly on 06/04/2026. Jefferies LLC is named as the broker-dealer.

Cash-flow treatment and whether these shares are registered for resale are not stated in the excerpt; subsequent SEC filings or broker confirmations would clarify execution and proceeds.

Corporate Governance Specialist

This is a routine resale notice by an affiliate of the company.

The entry "Founders shares acquired at incorporation" appears under the securities description with an original date of 05/27/2017, indicating the shares' origin. The filing lists broker details and transaction quantities but does not attach conditional qualifiers in the provided excerpt.

Monitoring future filings will show whether additional resale activity occurs or if any ownership limits apply.

Key Figures

Shares to be sold (listed): 30,975 shares Recent sale reported: 200,000 shares Broker-dealer listed: Jefferies LLC +2 more

5 metrics

Shares to be sold (listed) 30,975 shares "Securities To Be Sold" section

Recent sale reported 200,000 shares "Securities Sold During The Past 3 Months" on <date>06/04/2026</date>

Broker-dealer listed Jefferies LLC Securities Information section (address: 520 Madison Ave, New York, NY)

Original acquisition date (founders shares) 05/27/2017 "Founders shares acquired at incorporation"

Additional numeric fields present 91,069.60 and 63,230,000 Numeric values appearing in the excerpt without explicit labels

Key Terms

Form 144, Founders shares, Securities To Be Sold

3 terms

Form 144 regulatory

"Header and filing context indicating a resale notice"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Founders shares financial

""Founders shares acquired at incorporation""

Founders shares are a special block of a company’s stock originally given to the people who started the business; they often carry extra voting power or favorable terms compared with regular shares. For investors, these shares matter because they concentrate control and influence how future funding, ownership dilution, and decision-making will play out—think of founders shares as the steering wheel that can steer a company’s direction even as more passengers (investors) climb aboard.

Securities To Be Sold regulatory

"Section label listing 30,975 shares and dates"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Equillium's Form 144 disclose?

The Form 144 lists 30,975 shares under "Securities To Be Sold" and records a prior sale of 200,000 shares by Stephen Connelly on 06/04/2026. It names Jefferies LLC as the broker.

Who is the broker-dealer listed on the Equillium Form 144?

The filing names Jefferies LLC with an address at 520 Madison Ave, New York, NY. The broker-dealer is listed in the "Securities Information" section of the excerpt.

Which insider transaction is reported in the past three months for EQ?

The excerpt shows that Stephen Connelly sold 200,000 shares on 06/04/2026, recorded in the "Securities Sold During The Past 3 Months" section of the Form 144.

Are the shares described as founder shares or newly issued?

The filing describes the securities as "Founders shares acquired at incorporation" with an original date of 05/27/2017, indicating those shares trace to the company's founding.

Does the Form 144 state how much cash the company will receive?

The provided excerpt does not state proceeds to the company. It records quantities and a broker but does not disclose the cash-flow treatment or use of proceeds in this excerpt.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/05/2026 - 05:07 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001746808
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Equillium, Inc.
SEC File Number	001-38692
Address of Issuer	2223 AVENIDA DE LA PLAYA SUITE 105 LA JOLLA CALIFORNIA 92037
Phone	8584147800
Name of Person for Whose Account the Securities are To Be Sold	Connelly Stephen
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer
Relationship to Issuer	President and CSO

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Jefferies LLC 520 Madison Ave New York NY 10022	30975	91069.60	63230000	06/05/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/27/2017	Founders shares acquired at incorporation	Equillium, Inc			30975	05/27/2017	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Stephen Connelly 2223 Avenida De La Playa, Suite 105 La Jolla CA 92037	Equillium, Inc	06/04/2026	200000	632760.00

144: Remarks and Signature

Remarks
Date of Notice	06/05/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Stephen Connelly
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)