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Amphastar Pharmaceuticals
AMPH
AMPH
241 hedge funds and large institutions have $964M invested in Amphastar Pharmaceuticals in 2025 Q1 according to their latest regulatory filings, with 32 funds opening new positions, 80 increasing their positions, 95 reducing their positions, and 50 closing their positions.
New
Increased
Maintained
Reduced
Closed
90% more call options, than puts
Call options by funds: $637K | Put options by funds: $336K
3.39% less ownership
Funds ownership: 73.14% → 69.75% (-3.4%)
8% less funds holding
Funds holding: 263 → 241 (-22)
16% less repeat investments, than reductions
Existing positions increased: 80 | Existing positions reduced: 95
26% less capital invested
Capital invested by funds: $1.31B → $964M (-$342M)
36% less first-time investments, than exits
New positions opened: 32 | Existing positions closed: 50
100% less funds holding in top 10
Funds holding in top 10: 1 → 0 (-1)
Holders
241
Holders Change
-22
Holders Change %
-8.37%
% of All Funds
3.23%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
32
Increased
80
Reduced
95
Closed
50
Calls
$637K
Puts
$336K
Net Calls
+$301K
Net Calls Change
-$398K
Top Buyers
| 1 |
Millennium Management
New York
|
+$19.5M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$13.5M |
| 3 |
TD Asset Management
Toronto,
Ontario, Canada
|
+$11.9M |
| 4 |
ECM
ExodusPoint Capital Management
New York
|
+$11M |
| 5 |
RA
Royce & Associates
New York
|
+$7.63M |
Top Sellers
| 1 |
Neuberger Berman Group
New York
|
-$51M |
| 2 |
Pacer Advisors
Malvern,
Pennsylvania
|
-$27.8M |
| 3 |
Bessemer Group
Woodbridge,
New Jersey
|
-$15.6M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
-$9.32M |
| 5 |
Federated Hermes
Pittsburgh,
Pennsylvania
|
-$7.61M |
