O'SHAUGHNESSY ASSET MANAGEMENT, LLC
Position in AMPH — Amphastar Pharmaceuticals, Inc.
CIK 1423442
Stamford, CT
Position in AMPH
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$2,035,969
-$298,791 QoQ
Shares Held
103,929
+19.2% QoQ
Ownership
0.236%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2023
5 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in AMPH Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Mar 31, 2026O'SHAUGHNESSY ASSET MANAGEMENT, LLC holds $61,705,916 across 21 Drug Manufacturers - Specialty & Generic names. AMPH ranks #12 (3.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ZTS |
Zoetis Inc.
|
155,844 | $18,422,318 | |
| 2 | HLN |
Haleon plc
|
553,252 | $5,538,052 | |
| 3 | INDV |
Indivior Pharmaceuticals, Inc.
|
168,587 | $5,138,531 | |
| 4 | BHC |
Bausch Health Companies Inc.
|
797,545 | $4,306,743 | |
| 5 | TAK |
Takeda Pharmaceutical Co Ltd
|
185,765 | $3,440,367 | |
| 6 | TEVA |
Teva Pharmaceutical Industries Ltd
|
105,778 | $3,186,033 | |
| 7 | EBS |
Emergent BioSolutions Inc.
|
369,503 | $3,066,874 | |
| 8 | VTRS |
Viatris Inc
|
220,763 | $2,982,508 |
All Filings in AMPH
Export CSV
5 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $2,035,969 | 103,929 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $2,334,760 | 87,183 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $1,840,395 | 69,058 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $925,494 | 40,309 | Shares | Sole | 2025-08-12 | |
| 2023-12-31 | $261,501 | 4,228 | Shares | Sole | 2024-02-09 | |
| No filing history on record for this holder in this stock. | ||||||