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Advisor OS, LLC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1767580 CHICAGO, IL

Position in AMPH

as of Mar 31, 2026 · filed May 8, 2026
Position Value
$497,683
-$182,662 QoQ
Shares Held
25,405
0.0% QoQ
Ownership
0.058%
of shares outstanding
% of Portfolio
0.11%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2024
9 quarters on record
Voting authority Sole 0.ToString("F0")% Shared 0.ToString("F0")% None 100.ToString("F0")%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

Advisor OS, LLC holds $948,938 across 2 Drug Manufacturers - Specialty & Generic names. AMPH ranks #1 (52.4% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 AMPH
Amphastar Pharmaceuticals, Inc.
This page
25,405 $497,683

All Filings in AMPH

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9 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $497,683 25,405
2025-12-31 $680,345 25,405
2025-09-30 $677,043 25,405
2025-06-30 $583,298 25,405
2025-03-31 $736,490 25,405
2024-12-31 $943,287 25,405
2024-09-30 $1,263,381 26,033
2024-06-30 $1,040,480 26,012
2024-03-31 $1,182,891 26,939