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Amphastar Pharmaceuticals
AMPH
AMPH
235 hedge funds and large institutions have $900M invested in Amphastar Pharmaceuticals in 2025 Q4 according to their latest regulatory filings, with 26 funds opening new positions, 95 increasing their positions, 86 reducing their positions, and 33 closing their positions.
New
Increased
Maintained
Reduced
Closed
241% more call options, than puts
Call options by funds: $739K | Put options by funds: $217K
10% more repeat investments, than reductions
Existing positions increased: 95 | Existing positions reduced: 86
2.67% more ownership
Funds ownership: 70.43% → 73.1% (+2.7%)
3% more capital invested
Capital invested by funds: $873M → $900M (+$27.2M)
3% less funds holding
Funds holding: 243 → 235 (-8)
21% less first-time investments, than exits
New positions opened: 26 | Existing positions closed: 33
Holders
235
Holders Change
-8
Holders Change %
-3.29%
% of All Funds
2.86%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
26
Increased
95
Reduced
86
Closed
33
Calls
$739K
Puts
$217K
Net Calls
+$522K
Net Calls Change
-$1.1M
Top Buyers
| 1 |
American Century Companies
Kansas City,
Missouri
|
+$9.7M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$9.36M |
| 3 |
Goldman Sachs
New York
|
+$8.13M |
| 4 |
Pacer Advisors
Malvern,
Pennsylvania
|
+$4.42M |
| 5 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$4.3M |
