BRIDGEWAY CAPITAL MANAGEMENT, LLC
Position in AMPH — Amphastar Pharmaceuticals, Inc.
CIK 1107261
HOUSTON, TX
Position in AMPH
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$6,473,652
-$2,190,990 QoQ
Shares Held
330,457
+2.1% QoQ
Ownership
0.749%
of shares outstanding
% of Portfolio
0.13%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2025
4 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, 2026BRIDGEWAY CAPITAL MANAGEMENT, LLC holds $35,135,891 across 16 Drug Manufacturers - Specialty & Generic names. AMPH ranks #3 (18.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PCRX |
Pacira BioSciences, Inc.
|
411,373 | $9,297,029 | |
| 2 | PRGO |
PERRIGO Co plc
|
815,347 | $8,756,826 | |
| 3 | AMPH |
Amphastar Pharmaceuticals, Inc.
This page
|
330,457 | $6,473,652 | |
| 4 | SUPN |
Supernus Pharmaceuticals, Inc.
|
48,000 | $2,481,120 | |
| 5 | UTHR |
UNITED THERAPEUTICS Corp
|
2,620 | $1,553,607 | |
| 6 | IRWD |
Ironwood Pharmaceuticals Inc
|
440,493 | $1,546,130 | |
| 7 | AMRX |
Amneal Pharmaceuticals, Inc.
|
106,449 | $1,323,161 | |
| 8 | INDV |
Indivior Pharmaceuticals, Inc.
|
35,000 | $1,066,800 |
All Filings in AMPH
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $6,473,652 | 330,457 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $8,664,642 | 323,549 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $8,323,781 | 312,337 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,954,171 | 85,112 | Shares | Sole | 2025-08-14 | |
| No filing history on record for this holder in this stock. | ||||||