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MARSHALL WACE, LLP AMPH Position History
Amphastar Pharmaceuticals, Inc. • Healthcare
Quarters held
23
Latest value
$309K
Q2 2026
Peak value
$27.2M
First seen
Q1 2023
Dollar value over time
Show data table
| Period | Position value |
|---|---|
| Q1 2023 | $2.4M |
| Q2 2024 | $1.4M |
| Q2 2024 | $7.7M |
| Q3 2024 | $4.5M |
| Q3 2024 | $23.1M |
| Q4 2024 | $1.2M |
| Q4 2024 | $21.4M |
| Q1 2025 | $3.8M |
| Q1 2025 | $26.1M |
| Q2 2025 | $1.3M |
| Q2 2025 | $18.1M |
| Q3 2025 | $94K |
| Q3 2025 | $23M |
| Q3 2025 | $199K |
| Q4 2025 | $5.8M |
| Q4 2025 | $27.2M |
| Q4 2025 | $200K |
| Q1 2026 | $3.7M |
| Q1 2026 | $16.3M |
| Q1 2026 | $147K |
| Q2 2026 | $5.6M |
| Q2 2026 | $15.6M |
| Q2 2026 | $309K |
Quarter-by-quarter history
Every disclosed snapshot of the position
| Quarter | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|
| Q2 2026 | $309K | 15.3K | — | — |
| Q2 2026 | $15.6M | 771.0K | — | — |
| Q2 2026 | $5.6M | 279.9K | — | — |
| Q1 2026 | $147K | 7.5K | — | — |
| Q1 2026 | $16.3M | 831.0K | — | — |
| Q1 2026 | $3.7M | 187.2K | — | — |
| Q4 2025 | $200K | 7.5K | — | — |
| Q4 2025 | $27.2M | 1.02M | — | — |
| Q4 2025 | $5.8M | 214.8K | — | — |
| Q3 2025 | $199K | 7.5K | — | — |
| Q3 2025 | $23M | 863.1K | — | — |
| Q3 2025 | $94K | 3.5K | — | — |
| Q2 2025 | $18.1M | 790.1K | — | — |
| Q2 2025 | $1.3M | 58.6K | — | — |
| Q1 2025 | $26.1M | 899.3K | — | — |
| Q1 2025 | $3.8M | 132.4K | — | — |
| Q4 2024 | $21.4M | 575.6K | — | — |
| Q4 2024 | $1.2M | 33.1K | — | — |
| Q3 2024 | $23.1M | 475.9K | — | — |
| Q3 2024 | $4.5M | 92.6K | — | — |
| Q2 2024 | $7.7M | 193.3K | — | — |
| Q2 2024 | $1.4M | 33.8K | — | — |
| Q1 2023 | $2.4M | 64.2K | — | — |