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RK

Richard Koo

AMPH
DIRECTOR · AMPHASTAR PHARMACEUTICALS, INC. · CIK 0001611219
FILING MIX · LIFETIME60%/40%
BUYS
6
SELLS
4
TOTAL VALUE
$2.51M
COMPANIES
1
ACTIVE SINCE
May 2020
HOLDINGS NOW
259,289
AVG SELL PX
$18.57
TRADE KIND
SHOWING 10 / 10
Trades · vs SPY
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Performance · forward returns vs SPY
2 backtested trades · 8 horizonsHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Richard Koo, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d2+0.00%+1.26%+1.74%-0.47%-0.47%—
14d2+0.00%+5.90%+3.12%+2.78%+2.78%—
30d2+0.00%+10.96%+1.09%+9.87%+9.87%—
60d2+0.00%+8.65%+5.89%+2.76%+2.76%—
90d2+0.00%+4.59%+10.99%-6.40%-6.40%—
180d2+50.00%-1.27%+15.10%-16.36%-16.36%—
1y2+0.00%+49.27%+19.62%+29.65%+29.65%—
2y2+0.00%+121.72%+22.20%+99.52%+99.52%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
AMPH · 259,289 shares · as of Jun 7, 2021
073,800147,601221,401295,2012021SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2021
2021
FLOW · 6 buys / 4 sellsCOVERAGE · 5 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
17,182——17,182Jun 7, 2021Jun 8, 2021 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
6,019——259,289Jun 7, 2021Jun 8, 2021 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
SALE
25,827——0Jun 1, 2021Jun 2, 2021 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASE
25,827$16.43$424.3K279,097Jun 1, 2021Jun 2, 2021 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
SALE
25,827$19.28$498.0K253,270Jun 1, 2021Jun 2, 2021 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
5,851——253,270Jun 8, 2020Jun 9, 2020 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASEGRANT
Stock grant
16,004——16,004Jun 8, 2020Jun 9, 2020 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
SALE
47,782——0May 27, 2020May 28, 2020 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
SALE
47,782$18.18$868.9K247,419May 27, 2020May 28, 2020 ↗View →
AMPH
AMPHASTAR PHARMACEUTICALS, INC.
PURCHASE
47,782$15.11$722.0K295,201May 27, 2020May 28, 2020 ↗View →
Other insiders · AMPH
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About this filer
CIK 0001611219
ROLE
Director
PRIMARY
AMPH
COMPANIES
1
ACTIVE SINCE
May 2020
MARKETPEEL · /INSIDER/0001611219DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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