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John A. Scarlett

GERN
CHAIRMAN, PRESIDENT AND CEO · GERON CORP · CIK 0001270928
FILING MIX · LIFETIME67%/33%
BUYS
16
SELLS
8
TOTAL VALUE
$10.03M
COMPANIES
2
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
32,500
AVG SELL PX
$3.33
TRADE KIND
SHOWING 24 / 24
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
5 backtested trades · 8 horizons · 1 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by John A. Scarlett, 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
7d5+60.00%-0.33%+0.08%-0.42%-6.45%
14d5+60.00%-3.33%-1.87%-1.46%-4.26%
30d5+60.00%-7.44%-3.36%-4.08%-5.41%
60d5+60.00%-20.98%-0.49%-20.49%-33.89%
90d5+60.00%-4.91%+1.84%-6.76%-8.12%
180d5+40.00%-4.09%+11.46%-15.54%-13.71%
1y5+80.00%-32.41%+20.94%-53.35%-54.89%
2y5(1 pending)+100.00%-20.39%+51.53%-55.83%-54.40%
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
GERN · 12,500 shares · as of Feb 27, 2025
0750,0001,500,0002,250,0003,000,00020212022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
FLOW · 16 buys / 8 sellsCOVERAGE · 21 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GERN
GERON CORP
PURCHASE
Chairman, President and CEO
12,500$1.77$22.1K12,500Feb 27, 2025Mar 3, 2025View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
2,457,0002,457,000Feb 18, 2025Feb 20, 2025View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
410,000410,000Feb 18, 2025Feb 20, 2025View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
1,000,0001,000,000Jun 6, 2024Jun 7, 2024View →
GERN
GERON CORP
PURCHASE
Chairman, President and CEO
600,000$2.54$1.52M600,000Jun 4, 2024Jun 5, 2024View →
GERN
GERON CORP
SALE
Chairman, President and CEO
600,000$4.00$2.40M600,000Jun 4, 2024Jun 5, 2024View →
GERN
GERON CORP
SALE
Chairman, President and CEO
600,0000Jun 4, 2024Jun 5, 2024View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
3,000,0003,000,000Feb 14, 2024Feb 16, 2024View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
500,000500,000Aug 15, 2023Sep 21, 2023View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
1,750,0001,750,000Feb 22, 2023Feb 24, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,6680Feb 10, 2023Feb 10, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,668$3.00$1.34M0Feb 10, 2023Feb 10, 2023View →
GERN
GERON CORP
PURCHASE
Chairman, President and CEO
446,668$1.50$670.0K446,668Feb 10, 2023Feb 10, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,666$3.03$1.35M0Feb 9, 2023Feb 10, 2023View →
GERN
GERON CORP
PURCHASE
Chairman, President and CEO
446,666$1.50$670.0K446,666Feb 9, 2023Feb 10, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,6660Feb 9, 2023Feb 10, 2023View →
GERN
GERON CORP
PURCHASE
Chairman, President and CEO
446,666$1.50$670.0K446,666Feb 8, 2023Feb 10, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,6660Feb 8, 2023Feb 10, 2023View →
GERN
GERON CORP
SALE
Chairman, President and CEO
446,666$3.08$1.38M0Feb 8, 2023Feb 10, 2023View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
2,100,0002,100,000Feb 16, 2022Feb 18, 2022View →
CTMX
CYTOMX THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
20,00020,000Jun 16, 2021Jun 17, 2021View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
600,000600,000Feb 2, 2021Feb 4, 2021View →
CTMX
CYTOMX THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
20,00020,000Jun 17, 2020Jun 17, 2020View →
GERN
GERON CORP
PURCHASEGRANT
Stock grant
582,750582,750Feb 12, 2020Feb 14, 2020View →
Other insiders · GERN
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About this filer
CIK 0001270928
ROLE
Chairman, President and CEO
PRIMARY
GERN
COMPANIES
2
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001270928DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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