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Magnetar Financial LLC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1352851 EVANSTON, IL

Position in AMPH

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$220,083
-$10 QoQ
Shares Held
10,906
-2.9% QoQ
Ownership
0.026%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#118
of 209 holders
Holding Since
Jun 2025
3 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Jun 30, 2026

Magnetar Financial LLC holds $3,311,353 across 12 Drug Manufacturers - Specialty & Generic names. AMPH ranks #8 (6.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
8 AMPH
Amphastar Pharmaceuticals, Inc.
This page
10,906 $220,083

All Filings in AMPH

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3 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $220,083 10,906
2026-03-31 $220,093 11,235
2025-06-30 $306,217 13,337