DOSSIER · 13F Holders · Q2 2026

IONIS PHARMACEUTICALS INC

5 institutions still hold IONIS PHARMACEUTICALS INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 462222950·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$31M
visible holders
Holders
5
filers reporting
Concentration
43.49%
JPMORGAN CHASE & CO #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported IONIS PHARMACEUTICALS INC in Q2 2026. JPMORGAN CHASE & CO leads at 43.5% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
JPMORGAN CHASE & CO
CIK 0000019617
$13M165K0.00%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$10M125K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$5M65K0.00%Q2 2026
04
GROUP ONE TRADING LLC
CIK 0000932540
$2M28K0.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025