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[Form 4] IONIS PHARMACEUTICALS INC Insider Trading Activity

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

HANTSON LUDWIG reported acquisition or exercise transactions in this Form 4 filing.

Ionis Pharmaceuticals director Ludwig Hantson received a grant of 3,399 Restricted Stock Units on July 15, 2026 under the Ionis Pharmaceuticals, Inc. Amended and Restated 2002 Non-Employee Directors' Stock Option Plan. Each RSU is a contingent right to one share of common stock or its cash value, vesting in three equal annual installments from July 15, 2027 and fully vesting on July 15, 2029. As of the grant date, 0 RSUs were vested and he holds 3,399 RSUs in total.

Positive

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Insider HANTSON LUDWIG
Role Director
Type Security Shares Price Value
Grant/Award Restricted Stock Unit 3,399 $0.00 --
Holdings After Transaction: Restricted Stock Unit — 3,399 shares (Direct)
Footnotes (1)
  1. Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value. Grant on July 15, 2026 to reporting person of Restricted Stock Unit Award under the Ionis Pharmaceuticals, Inc. Amended and Restated 2002 Non-Employee Directors' Stock Option Plan. Restricted Stock Units vest in three equal annual installments, the first installment vesting on July 15, 2027. Upon vesting, the restricted stock units will be paid out in whole shares of Ionis common stock or cash as may be determined by the Company. The RSU shall be fully vested on July 15, 2029. The RSU is vested as to 0 shares on July 15, 2026.
Restricted Stock Units granted 3,399 units Grant to director Ludwig Hantson on July 15, 2026
Underlying common shares per RSU 1 share per unit Each RSU is a contingent right to one share of Ionis common stock
Vesting installments 3 annual installments RSUs vest in three equal annual installments starting July 15, 2027
Full vesting date July 15, 2029 RSUs shall be fully vested on July 15, 2029
RSUs vested at grant 0 units RSUs are vested as to 0 shares on July 15, 2026
Total RSUs after grant 3,399 units Total restricted stock units held directly following the reported award
Restricted Stock Unit financial
"Grant on July 15, 2026 to reporting person of Restricted Stock Unit Award"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
contingent right financial
"Each Restricted Stock Unit represents a contingent right to receive one share"
Amended and Restated 2002 Non-Employee Directors' Stock Option Plan financial
"under the Ionis Pharmaceuticals, Inc. Amended and Restated 2002 Non-Employee Directors' Stock Option Plan"

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FAQ

What insider transaction did Ionis Pharmaceuticals (IONS) report for Ludwig Hantson?

Ionis reported that director Ludwig Hantson received a grant of 3,399 Restricted Stock Units (RSUs) on July 15, 2026. The award was made under the company’s Amended and Restated 2002 Non-Employee Directors' Stock Option Plan and is payable in stock or cash upon vesting.

How many Restricted Stock Units did Ludwig Hantson receive in the IONS Form 4 filing?

Ludwig Hantson received 3,399 Restricted Stock Units from Ionis Pharmaceuticals. These RSUs correspond to 3,399 underlying shares of Ionis common stock, subject to vesting conditions, and result in total direct holdings of 3,399 RSUs immediately after the grant.

What is the vesting schedule for Ludwig Hantson's 3,399 Ionis (IONS) Restricted Stock Units?

The 3,399 RSUs vest in three equal annual installments beginning July 15, 2027. The award becomes fully vested on July 15, 2029, with 0 RSUs vested as of the July 15, 2026 grant date, according to the plan’s terms.

What does each Restricted Stock Unit represent in Ludwig Hantson's Ionis (IONS) award?

Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock or its equivalent cash value. Upon vesting, the RSUs will be paid out in whole shares or cash, as determined by Ionis Pharmaceuticals.

Under which equity plan were Ludwig Hantson's Ionis (IONS) RSUs granted?

The RSUs were granted under the Ionis Pharmaceuticals, Inc. Amended and Restated 2002 Non-Employee Directors' Stock Option Plan. This plan provides equity-based compensation to non-employee directors, including Restricted Stock Unit awards like Hantson’s grant.

How many Restricted Stock Units does Ludwig Hantson hold after this Ionis (IONS) grant?

Following the reported transaction, Ludwig Hantson holds 3,399 Restricted Stock Units. As of the July 15, 2026 grant date, the RSUs are vested as to 0 shares, with vesting beginning in 2027 and completing in 2029.
SEC Form 4
FORM 4UNITED 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*
HANTSON LUDWIG

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

(Street)
CARLSBAD CALIFORNIA 92010

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
IONIS PHARMACEUTICALS INC [ IONS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit$0.0(1)07/15/2026A3,399 (2) (2)Common Stock3,399$0.03,399D
Explanation of Responses:
1. Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.
2. Grant on July 15, 2026 to reporting person of Restricted Stock Unit Award under the Ionis Pharmaceuticals, Inc. Amended and Restated 2002 Non-Employee Directors' Stock Option Plan. Restricted Stock Units vest in three equal annual installments, the first installment vesting on July 15, 2027. Upon vesting, the restricted stock units will be paid out in whole shares of Ionis common stock or cash as may be determined by the Company. The RSU shall be fully vested on July 15, 2029. The RSU is vested as to 0 shares on July 15, 2026.
By: Patrick R. O'Neil, attorney-in-fact For: Ludwig Hantson07/17/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)