IONS — Isis Pharmaceuticals COM

Ownership history in BB BIOTECH AG · 34 quarters on record

This page tracks every 13F SEC filing in which BB BIOTECH AG reported a position in Isis Pharmaceuticals COM (IONS). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position

15.76% (2019 Q1)

Avg. % of fund

9.95%

First filed

2010 Q4

Last filed

2019 Q1

Quarters held

34

Quarter	Action	Shares	Change	Chg %	% of Fund	Mkt Value	Price (EOQ)
2019 Q1	REDUCED	7,725,000	-1,016,334	-11.6%	15.76%	$627.0M	$81.17
2018 Q4	ADDED	8,741,334	+75,000	+0.9%	15.14%	$472.6M	$54.06
2018 Q3	UNCHANGED	8,666,334	—	0%	11.83%	$447.0M	$51.58
2018 Q2	ADDED	8,666,334	+150,000	+1.8%	10.43%	$361.1M	$41.67

% of Fund (quarterly) IONS price (monthly, adj. close)

Other funds also holding IONS

As of 2025 Q4 — sorted by position size

Tweedy, Browne Co LLC 3Y 7Y 15.74% BOONE CAPITAL MANAGEMENT LLC 3Y 10.37% Bellevue Group AG 3Y 7Y 7.2% Tri Locum Partners LP 3Y 5.72% Orion Investment Co 5.43% Exome Asset Management LLC 4.41% Privium Fund Management B.V. 3Y 3.51% Sicart Associates LLC 3Y 7Y 3.43% SECTOR GAMMA AS 3Y 7Y 3.34% SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC 3Y 7Y 2.41%

← Back to BB BIOTECH AG Holdings