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[Form 4] Equillium, Inc. Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Equillium, Inc. (EQ) reporting person Stephen Connelly, Chief Scientific Officer and Director, received an employee stock option award covering 1,025,000 shares on 08/29/2025 with an exercise price of $1.74. The filing shows the option as acquired (code A) and lists 1,025,000 shares beneficially owned following the transaction. The explanatory note states standard time-based vesting: 25% vest on the first anniversary of the vesting commencement date and the remainder vests in 36 equal monthly installments thereafter.

Equillium, Inc. (EQ) la persona segnalante Stephen Connelly, Chief Scientific Officer e membro del consiglio, ha ricevuto un premio di opzioni su azioni riservate ai dipendenti per 1.025.000 azioni in data 29/08/2025 con prezzo di esercizio di $1,74. La comunicazione riporta l'opzione come acquisita (codice A) e indica la detenzione beneficiaria di 1.025.000 azioni a seguito della transazione. La nota esplicativa specifica il consueto piano di maturazione basato sul tempo: il 25% matura al primo anniversario della data di inizio del vesting e il restante viene maturato in 36 rate mensili uguali successivamente.

Equillium, Inc. (EQ) la persona informante Stephen Connelly, Director Científico y miembro del consejo, recibió una adjudicación de opciones sobre acciones para empleados por 1.025.000 acciones el 29/08/2025 con un precio de ejercicio de $1,74. La presentación muestra la opción como adquirida (código A) y enumera 1.025.000 acciones en propiedad beneficiaria tras la transacción. La nota explicativa indica el habitual calendario de consolidación por tiempo: el 25% se consolida en el primer aniversario del inicio del periodo de vesting y el resto se consolida en 36 cuotas mensuales iguales posteriormente.

Equillium, Inc. (EQ) 보고� Stephen Connelly(Chief Scientific Officer � 이사)� 2025-08-29� 직원 스톡옵션으로 1,025,000�� 부여받았으�, 행사가격은 $1.74입니�. 제출서류� 해당 옵션� 취득� 것으� 표시(코드 A)하고 거래 � 1,025,000�� 실질 보유하고 있는 것으� 기재하고 있습니다. 설명란에는 일반적인 시간 기반 가�(베스�) 조건� 명시되어 있으�: 베스� 시작일로부� 1년째� 25%가 베스트되� 나머지� 이후 36개월� 걸쳐 매월 동일� 비율� 베스트됩니다.

Equillium, Inc. (EQ) la personne déclarante Stephen Connelly, Chief Scientific Officer et administrateur, a reçu une attribution d'options d'achat d'actions pour employés de 1 025 000 actions le 29/08/2025 avec un prix d'exercice de 1,74 $. la déclaration indique l'option comme acquise (code A) et liste 1 025 000 actions détenues bénéficiairement après la transaction. La note explicative précise le calendrier standard de acquisition fondé sur le temps : 25 % acquièrent droit au premier anniversaire de la date de début du vesting et le reste s'acquiert en 36 versements mensuels égaux ensuite.

Equillium, Inc. (EQ) meldende Person Stephen Connelly, Chief Scientific Officer und Direktor, erhielt am 29.08.2025 eine Mitarbeiteraktien-Optionszuteilung über 1.025.000 Aktien mit einem Ausübungspreis von $1,74. Die Meldung führt die Option als erworben (Code A) und gibt nach der Transaktion 1.025.000 Aktien als wirtschaftlich gehalten an. Die erläuternde Anmerkung beschreibt die übliche zeitbasierte Vesting-Regelung: 25% werden am ersten Jahrestag des Vesting-Beginns fällig, der Rest vestet anschließend in 36 gleichen monatlichen Raten.

Positive
  • Significant retention incentive: Large time‑based option grant aligns the Chief Scientific Officers interests with long‑term shareholder value.
  • Standard vesting pattern: 25% after one year and monthly vesting thereafter supports retention over a multi‑year period.
Negative
  • Potential dilution: Grant of 1,025,000 shares could be dilutive depending on total outstanding shares (outstanding share count not provided).
  • Key details missing: The filing does not state the vesting commencement date, market price at grant, or whether any performance conditions apply.

Insights

TL;DR: A large time‑based option grant to a senior officer aligns incentives but creates potential dilution; vesting schedule is standard.

The 1,025,000‑s󲹰 option award to the Chief Scientific Officer and Director is a meaningful equity grant that ties long‑term executive incentives to company performance. The disclosed vesting structure�25% after one year, then monthly over three years—is conventional for retention. From governance perspective, materiality depends on EQ's outstanding share count (not provided in this filing). The filing is a routine disclosure under Section 16 and does not disclose cash compensation, prior grants, or any performance conditions.

TL;DR: Substantial option quantity at $1.74 strike could be highly valuable if share price rises, but current grant economics cannot be assessed here.

This Form 4 records acquisition of an employee stock option for 1,025,000 underlying shares with a $1.74 exercise price. The document provides the vesting cadence but omits the vesting commencement date and the company alance sheet or market price context, so intrinsic value and dilution impact cannot be calculated from this filing alone. No performance vesting or accelerated vesting terms are disclosed in the explanation provided.

Equillium, Inc. (EQ) la persona segnalante Stephen Connelly, Chief Scientific Officer e membro del consiglio, ha ricevuto un premio di opzioni su azioni riservate ai dipendenti per 1.025.000 azioni in data 29/08/2025 con prezzo di esercizio di $1,74. La comunicazione riporta l'opzione come acquisita (codice A) e indica la detenzione beneficiaria di 1.025.000 azioni a seguito della transazione. La nota esplicativa specifica il consueto piano di maturazione basato sul tempo: il 25% matura al primo anniversario della data di inizio del vesting e il restante viene maturato in 36 rate mensili uguali successivamente.

Equillium, Inc. (EQ) la persona informante Stephen Connelly, Director Científico y miembro del consejo, recibió una adjudicación de opciones sobre acciones para empleados por 1.025.000 acciones el 29/08/2025 con un precio de ejercicio de $1,74. La presentación muestra la opción como adquirida (código A) y enumera 1.025.000 acciones en propiedad beneficiaria tras la transacción. La nota explicativa indica el habitual calendario de consolidación por tiempo: el 25% se consolida en el primer aniversario del inicio del periodo de vesting y el resto se consolida en 36 cuotas mensuales iguales posteriormente.

Equillium, Inc. (EQ) 보고� Stephen Connelly(Chief Scientific Officer � 이사)� 2025-08-29� 직원 스톡옵션으로 1,025,000�� 부여받았으�, 행사가격은 $1.74입니�. 제출서류� 해당 옵션� 취득� 것으� 표시(코드 A)하고 거래 � 1,025,000�� 실질 보유하고 있는 것으� 기재하고 있습니다. 설명란에는 일반적인 시간 기반 가�(베스�) 조건� 명시되어 있으�: 베스� 시작일로부� 1년째� 25%가 베스트되� 나머지� 이후 36개월� 걸쳐 매월 동일� 비율� 베스트됩니다.

Equillium, Inc. (EQ) la personne déclarante Stephen Connelly, Chief Scientific Officer et administrateur, a reçu une attribution d'options d'achat d'actions pour employés de 1 025 000 actions le 29/08/2025 avec un prix d'exercice de 1,74 $. la déclaration indique l'option comme acquise (code A) et liste 1 025 000 actions détenues bénéficiairement après la transaction. La note explicative précise le calendrier standard de acquisition fondé sur le temps : 25 % acquièrent droit au premier anniversaire de la date de début du vesting et le reste s'acquiert en 36 versements mensuels égaux ensuite.

Equillium, Inc. (EQ) meldende Person Stephen Connelly, Chief Scientific Officer und Direktor, erhielt am 29.08.2025 eine Mitarbeiteraktien-Optionszuteilung über 1.025.000 Aktien mit einem Ausübungspreis von $1,74. Die Meldung führt die Option als erworben (Code A) und gibt nach der Transaktion 1.025.000 Aktien als wirtschaftlich gehalten an. Die erläuternde Anmerkung beschreibt die übliche zeitbasierte Vesting-Regelung: 25% werden am ersten Jahrestag des Vesting-Beginns fällig, der Rest vestet anschließend in 36 gleichen monatlichen Raten.

SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a 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). See Instruction 10.
1. Name and Address of Reporting Person*
Connelly Stephen

(Last) (First) (Middle)
2223 AVENIDA DE LA PLAYA, SUITE 105

(Street)
LA JOLLA CA 92037

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Equillium, Inc. [ EQ ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Scientific Officer
3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) $1.74 08/29/2025 A 1,025,000 (1) 08/28/2035 Common Stock 1,025,000 $0 1,025,000 D
Explanation of Responses:
1. 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.
/s/ Daniel M. Bradbury, Attorney-in-Fact 09/02/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Equillium (EQ) insider Stephen Connelly acquire?

Stephen Connelly acquired an employee stock option for 1,025,000 shares on 08/29/2025 with an exercise price of $1.74.

What is the vesting schedule for the option reported on the Form 4?

Vesting: 25% of the shares vest on the first anniversary of the vesting commencement date; the remainder vests in 36 equal monthly installments thereafter.

Does the Form 4 show how many shares Stephen Connelly owns after the transaction?

Yes. The filing lists 1,025,000 shares beneficially owned following the reported transaction.

What is the exercise price and transaction date of the option?

Exercise price: $1.74. Transaction date: 08/29/2025.

Are there performance conditions or the vesting commencement date disclosed?

No. The filing discloses only the time‑based vesting cadence and does not provide a vesting commencement date or any performance conditions.
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