Polaris Capital Management, LLC
Position in AMPH — Amphastar Pharmaceuticals, Inc.
CIK 1316926
BOSTON, MA
Position in AMPH
as of Mar 31, 2026
· filed Apr 27, 2026
Position Value
$846,914
-$104,632 QoQ
Shares Held
43,232
+21.7% QoQ
Ownership
0.098%
of shares outstanding
% of Portfolio
0.07%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2024
6 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, 2026Polaris Capital Management, LLC holds $107,320,546 across 5 Drug Manufacturers - Specialty & Generic names. AMPH ranks #5 (0.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | UTHR |
UNITED THERAPEUTICS Corp
|
96,650 | $57,311,517 | |
| 2 | LNTH |
Lantheus Holdings, Inc.
|
617,000 | $46,799,450 | |
| 3 | ANIP |
Ani Pharmaceuticals Inc
|
15,600 | $1,199,640 | |
| 4 | SUPN |
Supernus Pharmaceuticals, Inc.
|
22,500 | $1,163,025 | |
| 5 | AMPH |
Amphastar Pharmaceuticals, Inc.
This page
|
43,232 | $846,914 |
All Filings in AMPH
Export CSV
6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $846,914 | 43,232 | Shares | Sole | 2026-04-27 | |
| 2025-12-31 | $951,546 | 35,532 | Shares | Sole | 2026-01-29 | |
| 2025-09-30 | $349,115 | 13,100 | Shares | Sole | 2025-10-27 | |
| 2025-06-30 | $805,896 | 35,100 | Shares | Sole | 2025-07-21 | |
| 2025-03-31 | $892,892 | 30,800 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $909,685 | 24,500 | Shares | Sole | 2025-01-29 | |
| No filing history on record for this holder in this stock. | ||||||