Ionis Pharmaceuticals Inc.

Last updated September 27, 2026

Organization details

Legal name
Ionis Pharmaceuticals Inc.
Ownership
Public
Status
Active
Headquarters country
United States
Ticker symbol
IONS
Primary stock exchange
Nasdaq

Identifiers

SEC CIK
0000874015

Board of directors

Chief executives

Brett P. Monia · Chief Executive Officer
Dates unknown

Board connections

7 of this board's directors also sit on 8 other boards.

Network of Ionis Pharmaceuticals Inc.'s board connections AbCellera Biologics Inc. AbCellera Biologics In... Cognition Therapeutics Inc. Cognition Therapeutics... Cypherpunk Technologies Inc. Cypherpunk Technologie... Cytokinetics Incorporated Cytokinetics Incorpora... Encompass Health Corporation Encompass Health Corpo... Foghorn Therapeutics Inc. Foghorn Therapeutics I... OUTFRONT Media Inc. OUTFRONT Media Inc. Pacira BioSciences Inc. Pacira BioSciences Inc... B. Lynne Parshall B. Lynne Parshall Brett P. Monia Brett P. Monia Joan E. Herman Joan E. Herman Joseph H. Wender Joseph H. Wender Joseph Loscalzo Joseph Loscalzo Michael J. Yang Michael J. Yang Michael R. Hayden Michael R. Hayden Ionis Pharmaceuticals Inc.
Shared director Other board Same sector

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months
$1,058,700
2 purchases by 1 insider
Sold, last 12 months
$155,141,362
143 sales by 19 insiders
Date Insider Transaction Shares Price Value
Aug 31, 2026 BENNETT C FRANK Officer (EVP, Chief Scientific Officer) Other +110 $51.31 $5,644
Aug 31, 2026 Birchler Brian Officer (EVP, Corp and Development Ops) Other +58 $51.31 $2,976
Aug 31, 2026 Brett P. Monia Director, Officer (Chief Executive Officer) Other +98 $51.31 $5,028
Aug 31, 2026 O'NEIL PATRICK R. Officer (EVP CLO & General Counsel) Other +63 $51.31 $3,232
Jul 31, 2026 Michael R. Hayden Director Open-market purchase +5,000 $51.60 $258,000
Jul 30, 2026 Michael R. Hayden Director Open-market purchase +15,000 $53.38 $800,700
Jul 15, 2026 Spencer R. Berthelsen Director Option exercise +5,220 — —
Jul 15, 2026 Joan E. Herman Director Option exercise +5,220 — —
Jul 7, 2026 BENNETT C FRANK Officer (EVP, Chief Scientific Officer) Open-market sale −5,536 $83.58 $462,693
Jul 7, 2026 Allene M. Diaz Director Option exercise +10,111 $47.11 $476,329
Jul 7, 2026 Kordasiewicz Holly B. Officer (EVP, Chief Development Officer) Open-market sale −362 $84.30 $30,517
Jul 7, 2026 BENNETT C FRANK Officer (EVP, Chief Scientific Officer) Other +15,000 — —
Jul 7, 2026 Allene M. Diaz Director Open-market sale −10,111 $85.42 $863,637
Jul 7, 2026 BENNETT C FRANK Officer (EVP, Chief Scientific Officer) Open-market sale −15,000 $85.46 $1,281,930
Jul 1, 2026 Joseph Klein III Director Option exercise +11,518 $39.94 $460,029

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