AI summary pending
View Full Filing (SEC EDGAR)Amphastar Pharmaceuticals In
$25.87-2.1%
+$17.3M
Net Activity
-9.45% total shares
Institutions Holding
215
Popularity Rank
#2834
Avg Weight
0.03%
Total Value
$614.6M
Market Cap
$1.2B
215 institutions currently hold AMPH, with 98 net buyers and 112 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
112
Net Buying Institutions
98
Top 5 by Value
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Across its top 20 institutional holders, AMPH's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 39/100).
AMPH ranks #2834 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
215 institutions disclose a position in AMPH, but none treat it as a major bet — even Bridge City Capital, LLC, its most concentrated holder, allocates just 1.6% of its own portfolio to it.
SteelPeak Wealth, LLC has added to its AMPH position for two straight quarters, increasing it by $307.8K to reach $1.3M today.
CX Institutional has trimmed its AMPH position for two straight quarters, cutting it by $43.0K while still holding $15.0K.
AMPH is down 2.1% today, but institutions show net buying of $17.3M this quarter — a divergence between today's price move and the underlying institutional flow.
AMPH posted net income of $78.5M over the trailing twelve months, and currently trades at a P/E of 15.9.
+$97.4M
Total Buy Value
$122.5M
Total Sell Value
98
Net Buyers
112
Net Sellers
AMPH
Q2 2026
Top 5 Institutional Movers
-$30.2M
-$18.5M
-$17.6M
-$8.7M
AMPH does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
5
Filings (90d)
$1.73M
Total Est. Value
81K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| PETERS WILLIAM J | 2026-09-21 | $103K |
| Rong Zhou | 2026-09-01 | $290K |
| Floyd Petersen | 2026-08-18 | $989K |
| Richard Prins | 2026-08-11 | $162K |
| PETERS WILLIAM J | 2026-08-07 | $184K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)03209R103
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,662
Total reported value
$986.0B
Held by 4662 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,610
Total reported value
$529.1B
Held by 4610 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,442
Total reported value
$354.7B
Held by 4442 institutions — one of the most-tracked stocks on AlphaSMO
Access AMPH's institutional ownership data programmatically:
REST API
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