STOCK TITAN

[Form 4] Ionis Pharmaceuticals, Inc. Insider Trading Activity

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

Joseph Klein III, a director of Ionis Pharmaceuticals, reported multiple transactions dated 09/03/2025. The filing shows two non-derivative acquisitions recorded as 16,000 and 12,000 shares of common stock reported with transaction code M and price listed as $0.0, each noted as indirectly owned by a trust. On the same date the form records a sale of 28,000 common shares at $60 per share, with an explanatory note stating the sale was made pursuant to a Rule 10b5-1 trading plan adopted January 3, 2024. The report also lists 16,346 shares held directly and 100 shares held indirectly by his son, with the filer disclaiming beneficial ownership of the son's shares.

Joseph Klein III, amministratore di Ionis Pharmaceuticals, ha segnalato più operazioni in data 09/03/2025. La comunicazione riporta due acquisizioni non derivate di 16.000 e 12.000 azioni ordinarie, indicate con il codice transazione M e prezzo pari a $0.0, entrambe indirettamente possedute da un trust. Nella stessa data il modulo registra la vendita di 28.000 azioni ordinarie a $60 ciascuna; la nota esplicativa specifica che la vendita è avvenuta in base a un piano di negoziazione Rule 10b5-1 adottato il 3 gennaio 2024. Il rapporto indica inoltre 16.346 azioni detenute direttamente e 100 azioni detenute indirettamente da suo figlio, con il dichiarante che nega la titolarità beneficiaria delle azioni del figlio.

Joseph Klein III, director de Ionis Pharmaceuticals, informó varias transacciones con fecha 09/03/2025. El informe muestra dos adquisiciones no derivadas de 16.000 y 12.000 acciones ordinarias, registradas con el código de transacción M y precio de $0.0, ambas poseídas indirectamente por un fideicomiso. Ese mismo día se registra la venta de 28.000 acciones ordinarias a $60 por acción; la nota aclara que la venta se realizó conforme a un plan de negociación Rule 10b5-1 adoptado el 3 de enero de 2024. El informe también señala 16.346 acciones en posesión directa y 100 acciones poseídas indirectamente por su hijo, y el declarante niega la propiedad beneficiaria de las acciones del hijo.

Joseph Klein III, Ionis Pharmaceuticals의 이사, 은 2025-09-03자로 여러 거래를 보고했습니다. 제출서류에는 거래 코드 M과 가격 $0.0로 기재된 보통주 16,000주와 12,000주의 비파생 취득이 각각 신탁을 통해 간접 보유된 것으로 표시되어 있습니다. 같은 날짜에 양식에는 보통주 28,000주를 주당 $60에 매각한 기록이 있으며, 해당 매각은 2024년 1월 3일 채택된 Rule 10b5-1 거래 계획에 따라 이루어졌다는 설명이 붙어 있습니다. 보고서에는 또한 직접 보유16,346주와 아들이 간접 보유한 100주가 기재되어 있고, 신고인은 아들의 주식에 대한 실질적 소유권을 부인하고 있습니다.

Joseph Klein III, administrateur d'Ionis Pharmaceuticals, a déclaré plusieurs opérations datées du 09/03/2025. Le dossier fait état de deux acquisitions non dérivées de 16 000 et 12 000 actions ordinaires, enregistrées avec le code de transaction M et un prix de $0.0, toutes deux détenues indirectement par une fiducie. À la même date, le formulaire mentionne la vente de 28 000 actions ordinaires au prix de $60 par action ; la note explicative précise que la vente a été effectuée conformément à un plan de négociation Rule 10b5-1 adopté le 3 janvier 2024. Le rapport indique également 16 346 actions détenues directement et 100 actions détenues indirectement par son fils, le déclarant déclinant la qualité de bénéficiaire des actions détenues par son fils.

Joseph Klein III, Direktor von Ionis Pharmaceuticals, meldete mehrere Transaktionen datiert 09.03.2025. Die Einreichung weist zwei nicht-derivative Erwerbe von 16.000 bzw. 12.000 Stammaktien aus, aufgeführt mit dem Transaktionscode M und einem Preis von $0.0, jeweils indirekt durch einen Trust gehalten. Am selben Datum verzeichnet das Formular den Verkauf von 28.000 Stammaktien zu $60 je Aktie; eine Erläuterung weist darauf hin, dass der Verkauf im Rahmen eines am 3. Januar 2024 verabschiedeten Rule 10b5-1 Trading Plans erfolgte. Der Bericht listet außerdem 16.346 direkt gehaltene Aktien und 100 Aktien, die indirekt von seinem Sohn gehalten werden, wobei der Einreicher jegliches wirtschaftliches Eigentum an den Aktien des Sohnes verneint.

Positive
  • Sale executed under a Rule 10b5-1 trading plan, which provides an affirmative defense and signals pre-planned execution
  • Timely Section 16 disclosure by the reporting person showing compliance with insider reporting rules
  • Clear disclaimer disavowing beneficial ownership of securities held by the reporting person's son
Negative
  • Insider sale of 28,000 shares at $60 represents a notable disposition of shares by a director
  • Acquisitions reported at $0.0 and option-related entries may indicate complex internal transfers that reduce transparency for some investors

Insights

TL;DR: Director executed planned sale under a 10b5-1 plan; additional trust-related movements reported.

The Form 4 documents transparent disclosure of insider activity: a sale of 28,000 shares at $60 executed under a Rule 10b5-1 plan, which typically provides an affirmative defense against insider trading claims when properly adopted. Concurrently, the report shows acquisitions of 16,000 and 12,000 shares recorded as indirect trust holdings at $0.0, and the filing includes a disclaimer of beneficial ownership for 100 shares held by the reporting person’s son. From a governance perspective, the filing demonstrates compliance with Section 16 reporting and use of a trading plan to manage potential conflicts.

TL;DR: Insider sold 28,000 shares at $60 and reported trust-related option exercises or transfers; net beneficial holdings remain small relative to corporate scale.

The key market-impacting item is the disclosed sale of 28,000 shares at $60 per share executed pursuant to a 10b5-1 plan. The form also records two M-coded acquisitions totaling 28,000 common shares (16,000 and 12,000) listed at $0.0 and two non-qualified stock option exercises reported in Table II that correspond to those amounts. The report ends with 16,346 shares listed as directly owned and a 100-share indirect position tied to a family member. These transactions are routine insider activity and, absent additional context about total outstanding shares or larger holdings, do not by themselves indicate a material change to ownership control.

Joseph Klein III, amministratore di Ionis Pharmaceuticals, ha segnalato più operazioni in data 09/03/2025. La comunicazione riporta due acquisizioni non derivate di 16.000 e 12.000 azioni ordinarie, indicate con il codice transazione M e prezzo pari a $0.0, entrambe indirettamente possedute da un trust. Nella stessa data il modulo registra la vendita di 28.000 azioni ordinarie a $60 ciascuna; la nota esplicativa specifica che la vendita è avvenuta in base a un piano di negoziazione Rule 10b5-1 adottato il 3 gennaio 2024. Il rapporto indica inoltre 16.346 azioni detenute direttamente e 100 azioni detenute indirettamente da suo figlio, con il dichiarante che nega la titolarità beneficiaria delle azioni del figlio.

Joseph Klein III, director de Ionis Pharmaceuticals, informó varias transacciones con fecha 09/03/2025. El informe muestra dos adquisiciones no derivadas de 16.000 y 12.000 acciones ordinarias, registradas con el código de transacción M y precio de $0.0, ambas poseídas indirectamente por un fideicomiso. Ese mismo día se registra la venta de 28.000 acciones ordinarias a $60 por acción; la nota aclara que la venta se realizó conforme a un plan de negociación Rule 10b5-1 adoptado el 3 de enero de 2024. El informe también señala 16.346 acciones en posesión directa y 100 acciones poseídas indirectamente por su hijo, y el declarante niega la propiedad beneficiaria de las acciones del hijo.

Joseph Klein III, Ionis Pharmaceuticals의 이사, 은 2025-09-03자로 여러 거래를 보고했습니다. 제출서류에는 거래 코드 M과 가격 $0.0로 기재된 보통주 16,000주와 12,000주의 비파생 취득이 각각 신탁을 통해 간접 보유된 것으로 표시되어 있습니다. 같은 날짜에 양식에는 보통주 28,000주를 주당 $60에 매각한 기록이 있으며, 해당 매각은 2024년 1월 3일 채택된 Rule 10b5-1 거래 계획에 따라 이루어졌다는 설명이 붙어 있습니다. 보고서에는 또한 직접 보유16,346주와 아들이 간접 보유한 100주가 기재되어 있고, 신고인은 아들의 주식에 대한 실질적 소유권을 부인하고 있습니다.

Joseph Klein III, administrateur d'Ionis Pharmaceuticals, a déclaré plusieurs opérations datées du 09/03/2025. Le dossier fait état de deux acquisitions non dérivées de 16 000 et 12 000 actions ordinaires, enregistrées avec le code de transaction M et un prix de $0.0, toutes deux détenues indirectement par une fiducie. À la même date, le formulaire mentionne la vente de 28 000 actions ordinaires au prix de $60 par action ; la note explicative précise que la vente a été effectuée conformément à un plan de négociation Rule 10b5-1 adopté le 3 janvier 2024. Le rapport indique également 16 346 actions détenues directement et 100 actions détenues indirectement par son fils, le déclarant déclinant la qualité de bénéficiaire des actions détenues par son fils.

Joseph Klein III, Direktor von Ionis Pharmaceuticals, meldete mehrere Transaktionen datiert 09.03.2025. Die Einreichung weist zwei nicht-derivative Erwerbe von 16.000 bzw. 12.000 Stammaktien aus, aufgeführt mit dem Transaktionscode M und einem Preis von $0.0, jeweils indirekt durch einen Trust gehalten. Am selben Datum verzeichnet das Formular den Verkauf von 28.000 Stammaktien zu $60 je Aktie; eine Erläuterung weist darauf hin, dass der Verkauf im Rahmen eines am 3. Januar 2024 verabschiedeten Rule 10b5-1 Trading Plans erfolgte. Der Bericht listet außerdem 16.346 direkt gehaltene Aktien und 100 Aktien, die indirekt von seinem Sohn gehalten werden, wobei der Einreicher jegliches wirtschaftliches Eigentum an den Aktien des Sohnes verneint.

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).
X
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*
KLEIN JOSEPH III

(Last) (First) (Middle)
2855 GAZELLE COURT

(Street)
CARLSBAD CA 92010

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
IONIS PHARMACEUTICALS INC [ IONS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
09/03/2025
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 09/03/2025 M 16,000 A $0.0 16,000 I by Trust
Common Stock 09/03/2025 M 12,000 A $0.0 28,000 I by Trust
Common Stock 09/03/2025 S 28,000(1) D $60 0 I by Trust
Common Stock 16,346 D
Common Stock 100 I by Son(2)
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
Non-Qualified Stock Option (right to buy) $42.88 09/03/2025 M 12,000 07/02/2019 07/01/2028 Common Stock 12,000 $0.0 0 I by Trust
Non-Qualified Stock Option (right to buy) $52.22 09/03/2025 M 16,000 07/03/2018 07/02/2027 Common Stock 16,000 $0.0 0 I by Trust
Explanation of Responses:
1. Shares sold pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on January 3, 2024
2. The reporting person disclaims beneficial ownership of all securities held by his son, and this report should not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
By: Patrick R. O'Neil, attorney-in-fact For: Joseph Klein, III 09/04/2025
** 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 Joseph Klein III report on the Form 4 for IONS?

The filing reports multiple transactions dated 09/03/2025: acquisitions of 16,000 and 12,000 common shares (indirectly by a trust), a sale of 28,000 shares at $60 per share executed under a 10b5-1 trading plan, and holdings of 16,346 shares directly and 100 shares indirectly by his son.

Was the 28,000-share sale by Joseph Klein III part of a preplanned program?

Yes. The explanatory section states those shares were sold pursuant to a Rule 10b5-1 trading plan adopted on January 3, 2024.

Are any securities listed as held by family members in the Form 4?

Yes. The form lists 100 shares as indirectly owned by the reporting person’s son, and the reporting person disclaims beneficial ownership of those securities.

Do the acquisitions show a purchase price?

The two reported acquisitions of 16,000 and 12,000 common shares are listed with a price of $0.0 in the filing.

Who signed the Form 4 on behalf of Joseph Klein III?

The report was executed by Patrick R. O'Neil, attorney-in-fact for Joseph Klein, III on 09/04/2025.
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