§ PHARMACEUTICALS
USD · PharmaceuticalsAMPH
AMPHASTAR PHARMACEUTICALS IN
USDSector · PharmaceuticalsBeta · 0.91
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
103 increased/new, 74 decreased/exited (13F)
AC 13F Analysis
§ 04 · FUNDAMENTALS · THE BOOKS
| P/E | 10.8 | P/B | 1.56 |
| EPS (TTM) | 1.67 |
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| BlackRock, Inc. | 5.4M | 0.0% | −1% |
| Dimensional Fund Advisors | 2.0M | 0.0% | +13% |
| State Street | 1.6M | 0.0% | +5% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | n/a | n/a |
| TD Asset Management Inc | 1.5M | 0.0% | −22% |
| FULLER & THALER ASSET MANAGEMENT, INC. | 1.4M | 0.1% | n/a |
◇ AC INTELLIGENCE
Top institutional owners for AMPH as of the most recent 13F reporting period (Q1 2026 · Period ended Mar 31). Δ Q/Q reflects share-count change vs. the prior filing — positive green means adding, negative red means trimming. Cross-reference with the ownership-mix bars below to see which strategy cohort is driving the flow.
§ 06 · WHO OWNS IT · BY STRATEGY
OTHER95.7% · 0 holders
OTHER1.7% · 132 holders
PASSIVE / INDEX0.9% · 9 holders
DEALER / BANK0.5% · 24 holders
QUALITY / COMPOUNDER0.5% · 15 holders
SYSTEMATIC / QUANT0.3% · 10 holders
DEEP VALUE0.2% · 1 holder
INCOME / DEFENSIVE0.1% · 20 holders
ACTIVIST0.1% · 1 holder
TACTICAL / MACRO0.1% · 2 holders
◇ AC INTELLIGENCE
Ownership mix by behavioral cohort. Top bars indicate which style of capital dominates the float — passive indexing, quality compounders, dealer/bank, systematic quant, etc. Big quality-compounder share means concentrated active conviction; heavy passive share means flows are dictated by index rebalances, not fundamentals.
§ 07 · INSIDER ACTIVITY · LAST 180 DAYS
NO INSIDER FILINGS
◇ AC INTELLIGENCE
No Form 4 filings on record for AMPH in the last 180 days.
§ 08 · COVERAGE · OUR RECENT NOTES
No notes mention AMPH yet.