How many shares of PEN does Magnetar Financial LLC own?

As of 2026-Q1, Magnetar Financial LLC holds 251,433 shares of PEN (PENUMBRA INC).

What is Magnetar Financial LLC's PEN position worth?

As of 2026-Q1, Magnetar Financial LLC's PEN position is worth $82.6M.

In 2026-Q1, Magnetar Financial LLC opened a new position in PEN.

Position history for Magnetar Financial LLC's holdings in PENUMBRA INC

Current Value

$82.6M

Current Shares

251,433

Total Value Change

+$74.4M

Total Shares Change

+219,797

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q1 Latest	New	251,433	-	$82.6M	0.8%	$340.16	58
2025-Q4	Exited	0	-100.0%	$0	0.0%	$314.27	0
2025-Q3	Decreased	5,163	-83.7%	$1.3M	0.0%	$251.65	0
2025-Q2	New	31,636	-	$8.1M	0.0%	$256.43	38

Other major holders of PEN: FMR LLC, BlackRock, Inc.