Skip to main content
Equibles

JANUS HENDERSON GROUP PLC

Position in IONS — Ionis Pharmaceuticals Inc

CIK 1274173 LONDON, X0
Back to IONS Full portfolio

Position in IONS

as of Mar 31, 2026 · filed May 18, 2026
Position Value
$5,120,462
-$274,128 QoQ
Shares Held
68,191
0.0% QoQ
Ownership
0.041%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority Sole 0% Shared 0% None 100%

Common Shares in IONS Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Mar 31, 2026

JANUS HENDERSON GROUP PLC holds $15,214,395,751 across 183 Biotechnology names. IONS ranks #88 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ARGX
Argenx SE
 2,541,732 $1,856,099,791
2 PRAX
Praxis Precision Medicines, Inc.
 3,458,863 $1,114,411,067
3 MDGL
Madrigal Pharmaceuticals, Inc.
 2,018,647 $1,056,701,142
4 BBIO
BridgeBio Pharma, Inc.
 13,179,013 $978,673,503
5 PCVX
Vaxcyte, Inc.
 16,575,875 $963,224,094
6 VRTX
Vertex Pharmaceuticals Inc / Ma
 2,131,527 $951,812,064
7 RVMD
Revolution Medicines, Inc.
 9,766,496 $949,791,733
8 MIRM
Mirum Pharmaceuticals, Inc.
 6,945,813 $641,654,204

All Filings in IONS

Export CSV
24 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $5,120,462 68,191
2025-12-31 $5,394,590 68,191
2025-09-30 $4,178,833 63,877
2025-06-30 $2,523,780 63,877
2025-03-31 $1,927,169 63,877
2024-12-31 $2,233,139 63,877
2024-09-30 $2,362,618 58,977
2024-06-30 $2,810,843 58,977
2024-03-31 $2,588,731 59,717
2023-12-31 $3,020,374 59,703
2023-09-30 $2,712,799 59,806
2023-06-30 $2,453,675 59,802
2023-03-31 $2,139,359 59,859
2022-12-31 $2,029,078 53,722
2022-09-30 $1,023,481 23,140
2022-06-30 $859,122 23,207
2022-03-31 $952,779 25,723
2021-12-31 $782,537 25,716
2021-09-30 $461,107 13,748
2021-03-31 $3,445,914 76,644
2020-12-31 $2,862,394 50,626
2020-09-30 $2,879,218 60,679
2020-06-30 $4,099,311 69,527
2020-03-31 $2,235,114 47,274