Alyeska Investment Group, L.P.

Position in IONS — Ionis Pharmaceuticals Inc

CIK 1453072 CHICAGO, IL

Position in IONS

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$112,426,559

+$76,897,726 QoQ

Shares Held

1,417,916

+199.7% QoQ

Ownership

0.853%

of shares outstanding

% of Portfolio

0.32%

of 13F equity value

Holder Rank

#27

of 510 holders

Holding Since

Dec 2020

9 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

Alyeska Investment Group, L.P. holds $989,063,778 across 83 Biotechnology names. IONS ranks #2 (11.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	RVMD	Revolution Medicines, Inc.	659,279	$123,469,771
2	IONS	Ionis Pharmaceuticals Inc This page	1,417,916	$112,426,559
3	PTGX	Protagonist Therapeutics, Inc	889,298	$109,010,148
4	XENE	Xenon Pharmaceuticals Inc.	697,692	$42,112,689
5	MRNA	Moderna, Inc.	560,819	$39,274,154
6	KYMR	Kymera Therapeutics, Inc.	276,455	$31,701,094
7	LBRX	Lb Pharmaceuticals Inc	863,947	$28,039,399
8	PRAX	Praxis Precision Medicines, Inc.	80,846	$27,066,432

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$112,426,559	1,417,916	+199.7%	Shares	Sole	2026-08-14
2026-03-31	$35,528,833	473,150	-1.8%	Shares	Sole	2026-05-15
2025-12-31	$38,108,157	481,711	+54.8%	Shares	Sole	2026-02-13
2025-09-30	$20,362,498	311,258	+95.7%	Shares	Sole	2025-11-17
2025-06-30	$6,282,406	159,008	+6.0%	Shares	Sole	2025-08-14
2024-12-31	$5,244,000	150,000	-11.2%	Shares	Sole	2025-02-14
2024-09-30	$6,768,177	168,951	-60.5%	Shares	Sole	2024-11-14
2021-03-31	$19,242,430	427,990	+111.4%	Shares	Sole	2021-05-17
2020-12-31	$11,448,049	202,477	—	Shares	Sole	2021-02-16
No filing history on record for this holder in this stock.