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Hideki Garren

PRTA
CHIEF MEDICAL OFFICER · PROTHENA CORP PUBLIC LTD CO · CIK 0001854126
FILING MIX · LIFETIME38%/62%
BUYS
18
SELLS
29
TOTAL VALUE
$4.32M
COMPANIES
2
ACTIVE SINCE
Apr 2021
HOLDINGS NOW
90,000
AVG SELL PX
$52.17
TRADE KIND
SHOWING 47 / 47
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
20 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Hideki Garren, 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
7d20+80.00%-2.19%-0.19%-1.99%-2.71%—
14d20+75.00%+3.02%+1.24%+1.78%-3.13%—
30d20+65.00%+0.02%+2.60%-2.58%-5.71%—
60d20+65.00%+6.78%+1.80%+4.97%-10.89%—
90d20+65.00%+3.60%+3.66%-0.06%-21.23%—
180d20+60.00%-12.99%+9.79%-22.77%-31.72%—
1y20+85.00%-20.96%+22.83%-43.78%-80.29%—
2y20+100.00%-63.85%+48.35%-112.20%-128.88%—
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
PRTA · 85,000 shares · as of Feb 27, 2024
062,500125,000187,500250,000202220232024SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
FLOW · 18 buys / 29 sellsCOVERAGE · 12 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASEGRANT
Stock grant
85,000——85,000Feb 27, 2024Feb 29, 2024 ↗View →
COYA
COYA THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
5,000——5,000Jan 1, 2024Jan 19, 2024 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
2,000$55.48$111.0K0Sep 13, 2023Sep 13, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
2,000$24.90$49.8K2,000Sep 13, 2023Sep 13, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
2,000——192,000Sep 13, 2023Sep 13, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
374$59.74$22.3K0Aug 16, 2023Aug 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
2,000$24.90$49.8K2,000Aug 16, 2023Aug 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
748$58.93$44.1K374Aug 16, 2023Aug 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
878$58.15$51.1K1,122Aug 16, 2023Aug 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
2,000——194,000Aug 16, 2023Aug 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
7,331$74.00$542.5K0Jun 16, 2023Jun 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
7,331——198,000Jun 16, 2023Jun 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
7,331$24.90$182.5K7,331Jun 16, 2023Jun 16, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,669——205,331Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
2,534$74.59$189.0K655Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
509$72.45$36.9K4,160Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,669$24.90$116.3K4,669Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
655$75.49$49.4K0Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE10b5-1
10b5-1 plan
971$73.31$71.2K3,189Jun 14, 2023Jun 14, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
12,000$24.90$298.8K12,000Mar 15, 2023Mar 17, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
6,000$48.16$289.0K6,000Mar 15, 2023Mar 17, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
12,000——210,000Mar 15, 2023Mar 17, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
6,000$48.66$292.0K0Mar 15, 2023Mar 17, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASEGRANT
Stock grant
48,000——48,000Mar 2, 2023Mar 3, 2023 ↗View →
COYA
COYA THERAPEUTICS, INC.
PURCHASE
1,000——1,000Jan 3, 2023Jan 4, 2023 ↗View →
COYA
COYA THERAPEUTICS, INC.
PURCHASE
2,000——2,000Jan 3, 2023Jan 4, 2023 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000——222,000Dec 1, 2022Dec 2, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,000$24.90$99.6K4,000Dec 1, 2022Dec 2, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000$62.51$250.0K0Dec 1, 2022Dec 2, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
3,489$61.82$215.7K511Nov 1, 2022Nov 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
511$62.41$31.9K0Nov 1, 2022Nov 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,000$24.90$99.6K4,000Nov 1, 2022Nov 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000——226,000Nov 1, 2022Nov 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,000$24.90$99.6K4,000Oct 3, 2022Oct 5, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000$60.90$243.6K0Oct 3, 2022Oct 5, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000——230,000Oct 3, 2022Oct 5, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000$30.00$120.0K0Sep 15, 2022Sep 16, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000——234,000Sep 15, 2022Sep 16, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,000$24.90$99.6K4,000Sep 15, 2022Sep 16, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
4,000$24.90$99.6K4,000Aug 1, 2022Aug 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000——238,000Aug 1, 2022Aug 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
4,000$30.52$122.1K0Aug 1, 2022Aug 3, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASE
Chief Medical Officer
8,000$24.90$199.2K8,000Jul 6, 2022Jul 8, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
8,000$30.00$240.0K0Jul 6, 2022Jul 8, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
SALE
Chief Medical Officer
8,000——242,000Jul 6, 2022Jul 8, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASEGRANT
Stock grant
85,000——85,000Feb 23, 2022Feb 25, 2022 ↗View →
PRTA
PROTHENA CORP PUBLIC LTD CO
PURCHASEGRANT
Stock grant
250,000——250,000Apr 5, 2021Apr 7, 2021 ↗View →
Other insiders · PRTA
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About this filer
CIK 0001854126
ROLE
Chief Medical Officer
PRIMARY
PRTA
COMPANIES
2
ACTIVE SINCE
Apr 2021
MARKETPEEL · /INSIDER/0001854126DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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