13F Insight
DOSSIER · 13F Holders · Q2 2026
IONS 1.75 06/15/28

IONIS PHARMACEUTICALS INC

48 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 462222AF7·48 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$879M
visible holders
Holders
48
filers reporting
Concentration
16.81%
TENOR CAPITAL MANAGEMENT Co., L.P. #1
top holder share
AI Holders Summary · Q2 2026

48 institutions reported IONS 1.75 06/15/28 in Q2 2026. TENOR CAPITAL MANAGEMENT Co., L.P. leads at 16.8% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
TENOR CAPITAL MANAGEMENT Co., L.P.
CIK 0001346554
$148M94.7M2.08%Q2 202602
CITADEL ADVISORS LLC
CIK 0001423053
$135M86.5M0.02%Q2 202603
VOYA INVESTMENT MANAGEMENT LLC
CIK 0001068837
$119M76.7M0.10%Q2 202604
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 0001009258
$95M60.0M1.22%Q4 202505
DLD Asset Management, LP
CIK 0001578299
$94M60.0M6.19%Q2 202606
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
CIK 0000861177
$64M41.1M0.01%Q2 202607
LMR Partners LLP
CIK 0001578621
$62M40.0M0.23%Q2 202608
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$27M17.5M0.03%Q2 202609
STATE STREET CORP
CIK 0000093751
$23M15.0M0.00%Q2 202610
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$18M11.6M0.00%Q2 202611
BlackRock, Inc.
CIK 0002012383
$18M11.4M0.00%Q2 202612
M&G Plc
CIK 0001802539
$11M7.3M0.06%Q2 202613
FMR LLC
CIK 0000315066
$11M7.0M0.00%Q2 202614
LORD, ABBETT & CO. LLC
CIK 0000728100
$11M7.1M0.03%Q1 202615
Focus Partners Wealth
CIK 0001542153
$8M5.2M0.01%Q2 202616
ADVENT CAPITAL MANAGEMENT /DE/
CIK 0001097278
$8M5.1M0.18%Q2 202617
PICTON MAHONEY ASSET MANAGEMENT
CIK 0001539041
$8M5.0M0.06%Q2 202618
Sonora Investment Management Group, LLC
CIK 0001907552
$7M5.3M0.51%Q3 202519
STATE OF WISCONSIN INVESTMENT BOARD
CIK 0000854157
$6M4.0M0.01%Q2 202620
Amundi
CIK 0001330387
$5M3.5M0.00%Q2 2026
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