Institutional Ownership
Amphastar Pharmaceuticals In
CUSIP 03209R103COMAMPHQ1 2026
Institutional Holders
207
13F filers
Shares Held
29.44M
Aggregate institutional
Institutional Value
$554.74M
Q1 2026
Net New Holders
-23
21 new · 44 closed
Institutional Ownership Trend
Aggregate 13F value by quarter
Multi-quarter trend — upgrade to see history
UpgradePosition Activity
Q1 2026
New positions21
Increased68
Decreased94
Sold out44
Institutional Holders
207 funds hold this security · Q1 2026
| # | Fund | Shares | Value | Δ Shares | Activity |
|---|---|---|---|---|---|
| 1 | Blackrock, Inc. | 5.42M | $106.20M | −40.7K | Reduced |
| 2 | Dimensional Fund Advisors LP | 2.03M | $39.73M | +228.3K | Added |
| 3 | State Street Corp | 1.61M | $31.49M | +75.7K | Added |
| 4 | Td Asset Management Inc | 1.54M | $30.19M | −422.0K | Reduced |
| 5 | Fuller & Thaler Asset Management, Inc. | 1.40M | $27.33M | +676 | Added |
| 6 | Marshall Wace, LLP | 1.03M | $20.09M | −211.6K | Reduced |
| 7 | American Century Companies Inc | 1.02M | $19.93M | +352.2K | Added |
| 8 | Geode Capital Management, LLC | 976.6K | $19.14M | +89.8K | Added |
| 9 | Boston Trust Walden Corp | 944.8K | $18.51M | −142.5K | Reduced |
| 10 | Epoch Investment Partners, Inc. | 898.9K | $17.61M | −227.7K | Reduced |
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