Ionis (NASDAQ: IONS) EVP Schneider sells 5,812 shares in planned trade

Rhea-AI Filing Summary

Ionis Pharmaceuticals executive Eugene Schneider reported an open-market sale of 5,812 shares of Common Stock. The shares were sold at a weighted average price of $70.9715 per share on March 19, 2026, under a pre-arranged Rule 10b5-1 trading plan. After the transaction, Schneider directly holds 63,890 shares.

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

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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^*

Schneider Eugene

(Last) (First) (Middle)

C/O IONIS PHARMACEUTICALS

2855 GAZELLE CT

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chf Clinical Develop Ofcr

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/19/2026		S		5,812(1)	D	$70.9715(2)	63,890	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. Shares sold pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on November 19, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.76 to $71.375 inclusive. The reporting person undertakes to provide to Ionis Pharmaceuticals, Inc. any security holder of Ionis Pharmaceuticals, Inc. or the staff of the Securities and Exchange Commission,upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) on this Form 4.

	Patrick R. O'Neil, attorney-in-fact For: Eugene Schneider	03/23/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Ionis (IONS) report for Eugene Schneider?

Ionis reported that executive Eugene Schneider sold 5,812 shares of Common Stock in an open-market transaction. The sale was disclosed on a Form 4 and reflects a planned disposition under a Rule 10b5-1 trading arrangement.

At what price did Eugene Schneider sell Ionis (IONS) shares?

The reported weighted average sale price was $70.9715 per Ionis share. Footnotes explain the sale occurred through multiple trades between $70.76 and $71.375, with detailed price breakdowns available on request from the company or the SEC.

How many Ionis (IONS) shares does Eugene Schneider hold after the sale?

Following the reported sale, Eugene Schneider directly holds 63,890 shares of Ionis Common Stock. This post-transaction balance is disclosed in the Form 4 and represents his remaining direct ownership after the 5,812-share disposition.

Was the Ionis (IONS) insider sale made under a Rule 10b5-1 plan?

Yes. The filing states the shares were sold pursuant to a Rule 10b5-1 trading plan adopted by Eugene Schneider. Such plans are pre-arranged trading programs that execute transactions automatically according to preset instructions.

What role does Eugene Schneider hold at Ionis (IONS)?

Eugene Schneider serves as Executive Vice President and Chief Clinical Development Officer at Ionis Pharmaceuticals. His position as a senior officer makes his equity transactions subject to reporting on Form 4 under insider trading disclosure rules.