Position in AMPH
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$496,312
+$90,301 QoQ
Shares Held
25,335
+67.1% QoQ
Ownership
0.057%
of shares outstanding
% of Portfolio
0.07%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2022
14 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, 2026ADVISORY RESEARCH INC holds $1,509,177 across 2 Drug Manufacturers - Specialty & Generic names. AMPH ranks #2 (32.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | SUPN |
Supernus Pharmaceuticals, Inc.
|
19,595 | $1,012,865 | |
| 2 | AMPH |
Amphastar Pharmaceuticals, Inc.
This page
|
25,335 | $496,312 |
All Filings in AMPH
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14 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $496,312 | 25,335 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $406,011 | 15,161 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $412,222 | 15,468 | Shares | Sole | 2025-11-13 | |
| 2025-06-30 | $342,058 | 14,898 | Shares | Sole | 2025-08-13 | |
| 2025-03-31 | $402,642 | 13,889 | Shares | Sole | 2025-05-14 | |
| 2024-12-31 | $514,361 | 13,853 | Shares | Sole | 2025-02-13 | |
| 2024-09-30 | $670,199 | 13,810 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $570,800 | 14,270 | Shares | Sole | 2024-08-13 | |
| 2024-03-31 | $585,276 | 13,329 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $876,661 | 14,174 | Shares | Sole | 2024-02-13 | |
| 2023-09-30 | $684,791 | 14,890 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $885,440 | 15,407 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $554,212 | 14,779 | Shares | Sole | 2023-05-12 | |
| 2022-09-30 | $425,658 | 15,148 | Shares | Sole | 2022-11-15 | |
| No filing history on record for this holder in this stock. | ||||||