STOCK TITAN

[Form 4] IGM Biosciences, Inc. Insider Trading Activity

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

IGM Biosciences (IGMS) filed a Form 4 reporting that Chief Business Officer Lisa Lynn Decker sold 4,409 common shares on 07/23/2025 at a weighted-average price of $1.2728. The shares were automatically sold to satisfy tax-withholding obligations tied to the vesting of restricted stock units, as stated in the footnotes.

Following the transaction, Decker directly owns 68,169 shares. The sale represents roughly 6 % of her post-vesting position and involves no derivative securities. No other transactions or changes in indirect ownership were disclosed.

The filing is routine, driven by payroll-tax requirements rather than discretionary selling, and does not signal fundamental changes in Decker’s overall equity stake or the company’s outlook.

IGM Biosciences (IGMS) ha presentato un Modulo 4 segnalando che la Chief Business Officer Lisa Lynn Decker ha venduto 4.409 azioni ordinarie il 23/07/2025 a un prezzo medio ponderato di 1,2728 $. Le azioni sono state vendute automaticamente per soddisfare gli obblighi fiscali legati al vesting delle restricted stock units, come indicato nelle note a piè di pagina.

Dopo la transazione, Decker possiede direttamente 68.169 azioni. La vendita rappresenta circa il 6% della sua posizione post-vesting e non coinvolge strumenti derivati. Non sono state comunicate altre transazioni o variazioni nella proprietà indiretta.

La segnalazione è di routine, causata da requisiti fiscali legati alla busta paga piuttosto che da vendite discrezionali, e non indica cambiamenti fondamentali nella quota azionaria complessiva di Decker né nelle prospettive della società.

IGM Biosciences (IGMS) presentó un Formulario 4 informando que la Directora de Negocios Lisa Lynn Decker vendió 4,409 acciones comunes el 23/07/2025 a un precio promedio ponderado de $1.2728. Las acciones se vendieron automáticamente para cumplir con las obligaciones fiscales relacionadas con la consolidación de unidades de acciones restringidas, según se indica en las notas al pie.

Después de la transacción, Decker posee directamente 68,169 acciones. La venta representa aproximadamente el 6 % de su posición tras la consolidación y no involucra valores derivados. No se divulgaron otras transacciones ni cambios en la propiedad indirecta.

La presentación es rutinaria, motivada por requisitos fiscales de nómina más que por ventas discrecionales, y no señala cambios fundamentales en la participación accionaria general de Decker ni en las perspectivas de la compañía.

IGM 바이오사이언스(IGMS)는 최고사업책임자 Lisa Lynn Decker가 2025년 7월 23일에 4,409주 보통주가중평균 가격 $1.2728에 매도했다고 Form 4를 제출했습니다. 해당 주식은 제한 주식 단위의 권리 확정과 관련된 세금 원천징수 의무를 충족하기 위해 자동으로 매도되었으며, 각주는 이를 명시하고 있습니다.

거래 후 Decker는 직접적으로 68,169주를 보유하고 있습니다. 이번 매도는 권리 확정 후 보유 주식의 약 6%에 해당하며 파생 증권은 포함되지 않았습니다. 다른 거래나 간접 소유권 변화는 공개되지 않았습니다.

이번 제출은 급여세 관련 의무에 따른 일상적인 것으로, 임의 매도에 의한 것이 아니며, Decker의 전체 주식 지분이나 회사 전망에 근본적인 변화를 의미하지 않습니다.

IGM Biosciences (IGMS) a déposé un Formulaire 4 indiquant que la Directrice des Affaires Lisa Lynn Decker a vendu 4 409 actions ordinaires le 23/07/2025 à un prix moyen pondéré de 1,2728 $. Les actions ont été vendues automatiquement pour satisfaire aux obligations fiscales liées à l'acquisition des unités d'actions restreintes, comme précisé en notes de bas de page.

Après la transaction, Decker détient directement 68 169 actions. Cette vente représente environ 6 % de sa position après acquisition et n'implique aucun titre dérivé. Aucune autre transaction ou changement de propriété indirecte n'a été divulgué.

Le dépôt est de routine, motivé par des exigences fiscales liées à la paie plutôt que par une vente discrétionnaire, et ne signale aucun changement fondamental dans la participation globale de Decker ni dans les perspectives de la société.

IGM Biosciences (IGMS) reichte ein Formular 4 ein, in dem berichtet wird, dass die Chief Business Officer Lisa Lynn Decker am 23.07.2025 4.409 Stammaktien zu einem gewichteten Durchschnittspreis von 1,2728 $ verkauft hat. Die Aktien wurden automatisch verkauft, um Steuerabzugsverpflichtungen im Zusammenhang mit der Vesting von Restricted Stock Units zu erfüllen, wie in den Fußnoten angegeben.

Nach der Transaktion besitzt Decker direkt 68.169 Aktien. Der Verkauf entspricht etwa 6 % ihrer Position nach dem Vesting und beinhaltet keine derivativen Wertpapiere. Weitere Transaktionen oder Änderungen im indirekten Besitz wurden nicht offengelegt.

Die Meldung ist routinemäßig und resultiert aus lohnsteuerlichen Anforderungen und nicht aus diskretionären Verkäufen und signalisiert keine grundlegenden Änderungen an Deckers gesamtem Aktienanteil oder an den Aussichten des Unternehmens.

Positive
  • Sale linked to tax-withholding rather than discretionary profit-taking, reducing negative signaling.
  • Insider retains 68,169 shares, maintaining meaningful ownership alignment.
Negative
  • Insider sale, even if tax-related, can create minor negative sentiment among momentum traders.

Insights

TL;DR: Small tax-related sale; neutral governance signal.

The 4,409-share sale is a mechanical tax-withholding event tied to RSU vesting. Such trades are common and generally carry limited signaling value. Decker retains over 68 k shares, implying continued alignment with shareholders. No red flags on compliance; Form 4 was timely filed within the two-day window.

TL;DR: Transaction immaterial to IGMS valuation.

At roughly $5.6 k in gross proceeds, the sale is negligible relative to IGMS’s market cap and trading volume. Because it is non-discretionary, it should not influence positioning or risk models. Impact: neutral.

IGM Biosciences (IGMS) ha presentato un Modulo 4 segnalando che la Chief Business Officer Lisa Lynn Decker ha venduto 4.409 azioni ordinarie il 23/07/2025 a un prezzo medio ponderato di 1,2728 $. Le azioni sono state vendute automaticamente per soddisfare gli obblighi fiscali legati al vesting delle restricted stock units, come indicato nelle note a piè di pagina.

Dopo la transazione, Decker possiede direttamente 68.169 azioni. La vendita rappresenta circa il 6% della sua posizione post-vesting e non coinvolge strumenti derivati. Non sono state comunicate altre transazioni o variazioni nella proprietà indiretta.

La segnalazione è di routine, causata da requisiti fiscali legati alla busta paga piuttosto che da vendite discrezionali, e non indica cambiamenti fondamentali nella quota azionaria complessiva di Decker né nelle prospettive della società.

IGM Biosciences (IGMS) presentó un Formulario 4 informando que la Directora de Negocios Lisa Lynn Decker vendió 4,409 acciones comunes el 23/07/2025 a un precio promedio ponderado de $1.2728. Las acciones se vendieron automáticamente para cumplir con las obligaciones fiscales relacionadas con la consolidación de unidades de acciones restringidas, según se indica en las notas al pie.

Después de la transacción, Decker posee directamente 68,169 acciones. La venta representa aproximadamente el 6 % de su posición tras la consolidación y no involucra valores derivados. No se divulgaron otras transacciones ni cambios en la propiedad indirecta.

La presentación es rutinaria, motivada por requisitos fiscales de nómina más que por ventas discrecionales, y no señala cambios fundamentales en la participación accionaria general de Decker ni en las perspectivas de la compañía.

IGM 바이오사이언스(IGMS)는 최고사업책임자 Lisa Lynn Decker가 2025년 7월 23일에 4,409주 보통주가중평균 가격 $1.2728에 매도했다고 Form 4를 제출했습니다. 해당 주식은 제한 주식 단위의 권리 확정과 관련된 세금 원천징수 의무를 충족하기 위해 자동으로 매도되었으며, 각주는 이를 명시하고 있습니다.

거래 후 Decker는 직접적으로 68,169주를 보유하고 있습니다. 이번 매도는 권리 확정 후 보유 주식의 약 6%에 해당하며 파생 증권은 포함되지 않았습니다. 다른 거래나 간접 소유권 변화는 공개되지 않았습니다.

이번 제출은 급여세 관련 의무에 따른 일상적인 것으로, 임의 매도에 의한 것이 아니며, Decker의 전체 주식 지분이나 회사 전망에 근본적인 변화를 의미하지 않습니다.

IGM Biosciences (IGMS) a déposé un Formulaire 4 indiquant que la Directrice des Affaires Lisa Lynn Decker a vendu 4 409 actions ordinaires le 23/07/2025 à un prix moyen pondéré de 1,2728 $. Les actions ont été vendues automatiquement pour satisfaire aux obligations fiscales liées à l'acquisition des unités d'actions restreintes, comme précisé en notes de bas de page.

Après la transaction, Decker détient directement 68 169 actions. Cette vente représente environ 6 % de sa position après acquisition et n'implique aucun titre dérivé. Aucune autre transaction ou changement de propriété indirecte n'a été divulgué.

Le dépôt est de routine, motivé par des exigences fiscales liées à la paie plutôt que par une vente discrétionnaire, et ne signale aucun changement fondamental dans la participation globale de Decker ni dans les perspectives de la société.

IGM Biosciences (IGMS) reichte ein Formular 4 ein, in dem berichtet wird, dass die Chief Business Officer Lisa Lynn Decker am 23.07.2025 4.409 Stammaktien zu einem gewichteten Durchschnittspreis von 1,2728 $ verkauft hat. Die Aktien wurden automatisch verkauft, um Steuerabzugsverpflichtungen im Zusammenhang mit der Vesting von Restricted Stock Units zu erfüllen, wie in den Fußnoten angegeben.

Nach der Transaktion besitzt Decker direkt 68.169 Aktien. Der Verkauf entspricht etwa 6 % ihrer Position nach dem Vesting und beinhaltet keine derivativen Wertpapiere. Weitere Transaktionen oder Änderungen im indirekten Besitz wurden nicht offengelegt.

Die Meldung ist routinemäßig und resultiert aus lohnsteuerlichen Anforderungen und nicht aus diskretionären Verkäufen und signalisiert keine grundlegenden Änderungen an Deckers gesamtem Aktienanteil oder an den Aussichten des Unternehmens.

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).
1. Name and Address of Reporting Person*
Harler Mary Beth

(Last) (First) (Middle)
C/O IGM BIOSCIENCES, INC.
3 EAST THIRD AVENUE, SUITE 200

(Street)
SAN MATEO CA 94401

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
IGM Biosciences, Inc. [ IGMS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Executive Officer
3. Date of Earliest Transaction (Month/Day/Year)
07/23/2025
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
Common Stock 07/23/2025 S(1) 14,501 D $1.2728(2) 323,680 D
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
Explanation of Responses:
1. These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units.
2. This transaction was executed in multiple trades at prices ranging from $1.27 to $1.275. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer full information regarding the number of shares sold at each separate sale price.
/s/ Misbah Tahir, by power of attorney 07/25/2025
** 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

How many IGMS shares did the CBO sell on 07/23/2025?

She sold 4,409 common shares.

What was the average sale price for the IGMS shares?

The weighted-average price was $1.2728 per share.

Why were the shares sold by the IGMS insider?

The sale covered tax-withholding obligations triggered by RSU vesting.

How many IGMS shares does Lisa Lynn Decker own after the transaction?

She directly owns 68,169 shares following the sale.

Does the Form 4 include any derivative transactions?

No. No derivative securities were acquired or disposed of in this filing.
Igm Biosciences, Inc.

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