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Brett P. Monia owns 0.15% of Ionis Pharmaceuticals

242,760 shares as of the August 31, 2026 filing, worth $10.5M at the latest close.

IONS · $7.2B market cap · Founder-led
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Free.
The stake
0.15%
worth $10.5M at the latest close
Stake rank
#1,678
by dollar value of the stake
Last sale
123 days ago
Jun 26, 2026
Last buy
None
no purchases since 2016

Brett P. Monia owns 0.15% of IONIS PHARMACEUTICALS INC: 242,760 of 166,184,322 shares, worth about $10.5M at the 2026-10-26 close. The stake has moved from 0.00% in 2016 to 0.15% on 2026-08-31, across 36 sales and 0 purchases that moved it since 2016. The last trade that moved it was a planned sale of $6.8M on 2026-06-26.

How the stake is held

as of the Aug 31, 2026 filing
SHARES
OF THE STAKE
COMMON STOCK · stated Aug 31, 2026 · Form 4 ↗
HELD DIRECTLY
242,760
100.0%
THE STAKE
242,760
0.15%