MarketPeel
Insider Trading Intelligence
WB

William V. Balderston

GBLI
CHIEF MARKETING OFFICER · GLOBAL INDEMNITY GROUP, LLC · CIK 0002015548
FILING MIX · LIFETIME100%/0%
BUYS
2
SELLS
0
TOTAL VALUE
$3.0K
COMPANIES
1
ACTIVE SINCE
Mar 2024
HOLDINGS NOW
105
AVG SELL PX
TRADE KIND
SHOWING 2 / 2
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by William V. Balderston, 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
7d1+100.00%+0.83%-1.05%+1.89%+1.89%
14d1+100.00%+2.40%+0.27%+2.13%+2.13%
30d1+100.00%+4.07%+1.94%+2.13%+2.13%
60d1+100.00%+1.29%+2.81%-1.53%-1.53%
90d1+100.00%+0.52%+5.91%-5.39%-5.39%
180d1+100.00%+1.77%+7.61%-5.83%-5.83%
1y1(1 pending)
2y1(1 pending)
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
GBLI · 105 shares · as of Aug 13, 2025
012,50025,00037,50050,0002025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2024
2024
2024
2024
2025
2025
2025
FLOW · 2 buys / 0 sellsCOVERAGE · 7 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
GBLI
GLOBAL INDEMNITY GROUP, LLC
PURCHASE
Chief Marketing Officer
105$28.57$3.0K105Aug 13, 2025Aug 15, 2025View →
GBLI
GLOBAL INDEMNITY GROUP, LLC
PURCHASEGRANT
Stock grant
50,00050,000Mar 6, 2024Mar 22, 2024View →
Other insiders · GBLI
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About this filer
CIK 0002015548
ROLE
Chief Marketing Officer
PRIMARY
GBLI
COMPANIES
1
ACTIVE SINCE
Mar 2024
MARKETPEEL · /INSIDER/0002015548DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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