TWO SIGMA INVESTMENTS, LP
Position in AMPH — Amphastar Pharmaceuticals, Inc.
CIK 1179392
NEW YORK, NY
Position in AMPH
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$5,006,960
+$2,300,641 QoQ
Shares Held
248,115
+79.6% QoQ
Ownership
0.583%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#24
of 209 holders
Holding Since
Jun 2020
17 quarters on record
Voting authority
Sole 99%
Shared 0%
None 1%
Common Shares in AMPH Over Time
Shares Held
Position Value (USD)
Position in Drug Manufacturers - Specialty & Generic
Healthcare · as of Jun 30, 2026TWO SIGMA INVESTMENTS, LP holds $775,744,366 across 48 Drug Manufacturers - Specialty & Generic names. AMPH ranks #19 (0.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | NBIX |
Neurocrine Biosciences Inc
|
2,076,260 | $349,932,860 | |
| 2 | BCRX |
Biocryst Pharmaceuticals Inc
|
6,775,349 | $67,753,490 | |
| 3 | SUPN |
Supernus Pharmaceuticals, Inc.
|
1,184,378 | $55,085,420 | |
| 4 | ALKS |
Alkermes plc.
|
1,038,311 | $54,407,496 | |
| 5 | KNSA |
Kiniksa Pharmaceuticals International, plc
|
561,480 | $35,906,646 | |
| 6 | ZTS |
Zoetis Inc.
|
386,428 | $27,768,716 | |
| 7 | LQDA |
Liquidia Corp
|
266,829 | $21,274,276 | |
| 8 | IRWD |
Ironwood Pharmaceuticals Inc
|
4,556,089 | $19,181,134 |
All Filings in AMPH
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $5,006,960 | 248,115 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $2,706,319 | 138,148 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $2,642,596 | 98,678 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $2,629,768 | 98,678 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,839,784 | 80,130 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $2,183,758 | 75,328 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $3,645,571 | 98,184 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $4,794,666 | 98,798 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $3,857,200 | 96,430 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $4,250,663 | 96,804 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $2,583,783 | 41,775 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $4,391,309 | 95,484 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $1,724,674 | 30,010 | Shares | Sole | 2023-08-14 | |
| 2022-06-30 | $737,548 | 21,200 | Shares | Sole | 2022-08-15 | |
| 2021-03-31 | $1,619,030 | 88,375 | Shares | Sole | 2021-05-17 | |
| 2020-09-30 | $3,543,937 | 189,010 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $1,199,588 | 53,410 | Shares | Sole | 2020-08-14 | |
| No filing history on record for this holder in this stock. | ||||||