IONS
Pharmaceuticals, Biotechnology & Life Sciences
CROWD: GREEN
Quiet institutional ownership. No unusual crowd behavior in the latest filings.
Active holders
271
of 491 total, index funds excluded
Conviction
2 bps
median holder weight: token bet
Streak
0q
consecutive rising quarters
The crowd, 2016 to now
active holders per quarter
2016Mar 2026
Holdings as of Mar 31, 2026, filed by May 16, 2026. Counts for the newest quarter keep settling for a few weeks as amendments land.
The tide
funds in (up) vs out (down)
Top holders
by reported value · $13.0B held
| Fund | Value | Note |
|---|
| FMR LLC |
$1.8B |
|
| Capital World Investors |
$1.6B |
|
| BlackRock, Inc. |
$784M |
|
| VANGUARD PORTFOLIO MANAGEME… |
$586M |
|
| VANGUARD CAPITAL MANAGEMENT… |
$535M |
|
| WELLINGTON MANAGEMENT GROUP… |
$480M |
|
| T. Rowe Price Investment Ma… |
$462M |
|
| TWO SIGMA INVESTMENTS, LP |
$440M |
|
| GEODE CAPITAL MANAGEMENT, L… |
$305M |
|
| STATE STREET CORP |
$300M |
|
Tourists vs true believers
every holder a dot · right = bigger bet in their own book, up = patient money
Hover any dot for the fund and its bet size. Patience is measured from each filer's actual quarter-to-quarter turnover across our whole database.