IONS

SEC source: 0000874015-23-000179 · edgardoc.xml · derivative · entry 4

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F4 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000179 · edgardoc.xml · derivative · entry 3

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F3 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000179 · edgardoc.xml · nonDerivative · entry 2

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 112,079

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000179 · edgardoc.xml · nonDerivative · entry 1

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Trust

Disclosed balance after: 106,746

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000178 · edgardoc.xml · derivative · entry 4

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F4 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000178 · edgardoc.xml · derivative · entry 3

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F3 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000178 · edgardoc.xml · nonDerivative · entry 2

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,588

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000178 · edgardoc.xml · nonDerivative · entry 1

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,255

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000177 · edgardoc.xml · derivative · entry 4

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F4 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000177 · edgardoc.xml · derivative · entry 3

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F3 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000177 · edgardoc.xml · nonDerivative · entry 2

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,082

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000177 · edgardoc.xml · nonDerivative · entry 1

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 35,749

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000176 · edgardoc.xml · derivative · entry 7

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F6 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F6 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000176 · edgardoc.xml · derivative · entry 6

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F5 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F5 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000176 · edgardoc.xml · nonDerivative · entry 2

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,901

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000176 · edgardoc.xml · nonDerivative · entry 1

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,568

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000175 · edgardoc.xml · derivative · entry 4

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F4 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000175 · edgardoc.xml · derivative · entry 3

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F3 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000175 · edgardoc.xml · nonDerivative · entry 2

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,330

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000175 · edgardoc.xml · nonDerivative · entry 1

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,997

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000174 · edgardoc.xml · derivative · entry 5

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F5 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F5 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000174 · edgardoc.xml · derivative · entry 4

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F4 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000174 · edgardoc.xml · nonDerivative · entry 2

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,219

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000174 · edgardoc.xml · nonDerivative · entry 1

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,886

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000173 · edgardoc.xml · derivative · entry 2

Diaz Allene M. · CIK 0001773314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F3 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000173 · edgardoc.xml · nonDerivative · entry 1

Diaz Allene M. · CIK 0001773314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,333

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000172 · edgardoc.xml · derivative · entry 5

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,677

Underlying: Common Stock · 5,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F5 · derivative.exercise_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

F5 · derivative.expiration_date: Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and are delivered to the reporting person on the July 15th following the vesting date. Upon vesting, the Restricted Stock Units will be paid in whole shares of Ionis common stock or cash as may be determined by the Company.

SEC source: 0000874015-23-000172 · edgardoc.xml · derivative · entry 4

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 1,777 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F4 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F4 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.

SEC source: 0000874015-23-000172 · edgardoc.xml · nonDerivative · entry 2

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 147,257

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000172 · edgardoc.xml · nonDerivative · entry 1

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,924

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

F1 · shares: Acquired pursuant to vesting and release of shares in accordance with a Restricted Stock Unit award.

SEC source: 0000874015-23-000163 · edgardoc.xml · nonDerivative · entry 1

Monia Brett P · CIK 0001537529 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 121,724

F1 · shares: Shares sold pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on November 16, 2022.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $42.00 to $42.50 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.

SEC source: 0000874015-23-000161 · edgardoc.xml · derivative · entry 2

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000161 · edgardoc.xml · derivative · entry 1

WENDER JOSEPH H · CIK 0001073384 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000160 · edgardoc.xml · derivative · entry 2

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000160 · edgardoc.xml · derivative · entry 1

PARSHALL B LYNNE · CIK 0001073385 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000159 · edgardoc.xml · derivative · entry 2

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000159 · edgardoc.xml · derivative · entry 1

LOSCALZO JOSEPH · CIK 0001276128 · Director · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000158 · edgardoc.xml · derivative · entry 2

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant of Restricted Stock Unit award on July 3, 2023 to the reporting person under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier; however, the reporting person has elected to defer delivery of such shares until the earlier to occur of the 30th day following the reporting person's Separation from Service from the Company or the date of a Change in Control of the Company, both as defined in Treasury Regulation Section 1.409A. These Restricted Stock Units are vested as to 0 shares on July 3, 2023

F4 · derivative.expiration_date: Grant of Restricted Stock Unit award on July 3, 2023 to the reporting person under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier; however, the reporting person has elected to defer delivery of such shares until the earlier to occur of the 30th day following the reporting person's Separation from Service from the Company or the date of a Change in Control of the Company, both as defined in Treasury Regulation Section 1.409A. These Restricted Stock Units are vested as to 0 shares on July 3, 2023

SEC source: 0000874015-23-000158 · edgardoc.xml · derivative · entry 1

KLEIN JOSEPH III · CIK 0001206369 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000157 · edgardoc.xml · derivative · entry 2

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000157 · edgardoc.xml · derivative · entry 1

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000156 · edgardoc.xml · derivative · entry 2

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant of Restricted Stock Unit award on July 3, 2023 to the reporting person under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier; however, the reporting person has elected to defer delivery of such shares until the earlier to occur of the 30th day following the reporting person's Separation from Service from the Company or the date of a Change in Control of the Company, both as defined in Treasury Regulation Section 1.409A. These Restricted Stock Units are vested as to 0 shares on July 3, 2023

F4 · derivative.expiration_date: Grant of Restricted Stock Unit award on July 3, 2023 to the reporting person under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier; however, the reporting person has elected to defer delivery of such shares until the earlier to occur of the 30th day following the reporting person's Separation from Service from the Company or the date of a Change in Control of the Company, both as defined in Treasury Regulation Section 1.409A. These Restricted Stock Units are vested as to 0 shares on July 3, 2023

SEC source: 0000874015-23-000156 · edgardoc.xml · derivative · entry 1

Hayden Michael R · CIK 0001352908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000155 · edgardoc.xml · derivative · entry 2

Diaz Allene M. · CIK 0001773314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,010

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000155 · edgardoc.xml · derivative · entry 1

Diaz Allene M. · CIK 0001773314 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000154 · edgardoc.xml · derivative · entry 2

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,787

Underlying: Common Stock · 4,677 shares

Expires not disclosed

F3 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F4 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

F4 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of Restricted Stock Unit award under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. These Restricted Stock Units vest 100% on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier, and will be delivered to the reporting person on the July 15th following the vesting date. The Restricted Stock Unit is vested as to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000154 · edgardoc.xml · derivative · entry 1

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,321

Underlying: Common Stock · 10,321 shares

Expires 2033-07-02

F1 · shares: Pursuant to the Company's Non-Employee Director Compensation Policy, these grants were adjusted downward such that the non-employee Director's annual equity compensation in 2023 totals no more than $450,000 based on the aggregate grant date fair value as determined in accordance with FASB Topic ASC 718.

F2 · derivative.exercise_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

F2 · derivative.expiration_date: Grant on July 3, 2023 to reporting person of stock options under the Amended and Restated Ionis Pharmaceuticals, Inc. 2002 Non-Employee Directors' Stock Option Plan. 100% of the shares subject to the option vest and become exercisable on either the first anniversary of the date of grant or the next regularly scheduled annual meeting of stockholders of the Company, whichever occurs earlier. The option is exercisable to 0 shares on July 3, 2023.

SEC source: 0000874015-23-000144 · edgardoc.xml · derivative · entry 3

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,250 shares

Expires 2023-06-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000874015-23-000144 · edgardoc.xml · nonDerivative · entry 1

BERTHELSEN SPENCER R · CIK 0001181548 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,147

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Acquired as a result of exercising a stock option that was scheduled to expire on 6/30/2023

F1 · shares: Acquired as a result of exercising a stock option that was scheduled to expire on 6/30/2023

SEC source: 0000874015-23-000142 · edgardoc.xml · derivative · entry 2

HERMAN JOAN E · CIK 0001248398 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,110

Underlying: Common Stock · 3,555 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Ionis common stock, or its equivalent cash value.

F3 · derivative.exercise_date: Restricted Stock Units vest in four equal annual installments. 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.

F3 · derivative.expiration_date: Restricted Stock Units vest in four equal annual installments. 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.