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Equibles

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in IONS — Ionis Pharmaceuticals Inc

CIK 1164508 BOSTON, MA
Back to IONS Full portfolio

Position in IONS

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$50,113,500
-$5,292,332 QoQ
Shares Held
632,028
-14.3% QoQ
Ownership
0.380%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#47
of 513 holders
Holding Since
Sep 2020
8 quarters on record
Voting authority Sole 99% Shared 0% None 1%

Common Shares in IONS Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $2,515,799,583 across 71 Biotechnology names. IONS ranks #12 (2.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 VRTX
Vertex Pharmaceuticals Inc / Ma
 738,378 $366,774,503
2 INCY
Incyte Corp
 2,744,958 $311,168,438
3 REGN
Regeneron Pharmaceuticals, Inc.
 393,685 $245,478,344
4 EXEL
Exelixis, Inc.
 4,365,926 $237,550,033
5 GMAB
Genmab A/S
 4,975,324 $136,672,150
6 RPRX
Royalty Pharma plc
 2,435,341 $136,549,569
7 HALO
Halozyme Therapeutics, Inc.
 1,704,623 $133,420,842
8 ONC
BeOne Medicines Ltd.
 249,758 $71,173,537

All Filings in IONS

Export CSV
8 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $50,113,500 632,028
2026-03-31 $55,405,832 737,859
2025-12-31 $84,119,798 1,063,327
2025-09-30 $41,223,497 630,136
2022-06-30 $1,521,670 41,104
2021-09-30 $1,378,494 41,100
2021-06-30 $3,705,781 92,900
2020-09-30 $1,233,700 26,000