MarketPeel
Insider Trading Intelligence
TA

Tina M. Albertson

CRBU
CHIEF MEDICAL OFFICER · CARIBOU BIOSCIENCES, INC. · CIK 0001917391
FILING MIX · LIFETIME86%/14%
BUYS
6
SELLS
1
TOTAL VALUE
$2.1K
COMPANIES
2
ACTIVE SINCE
Feb 2023
HOLDINGS NOW
768,523
AVG SELL PX
$1.96
TRADE KIND
SHOWING 7 / 7
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by Tina M. Albertson, 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%-17.76%-1.02%-16.74%-16.74%
14d1+100.00%-5.14%-1.48%-3.66%-3.66%
30d1+100.00%-10.75%-6.15%-4.60%-4.60%
60d1+100.00%-0.47%+3.87%-4.34%-4.34%
90d1+100.00%-7.01%
180d1(1 pending)
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
CRBU · 68,523 shares · as of Feb 24, 2026
075,000150,000225,000300,00020252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 6 buys / 1 sellsCOVERAGE · 13 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CRBU
CARIBOU BIOSCIENCES, INC.
SALE10b5-1
10b5-1 plan
1,066$1.96$2.1K68,523Feb 24, 2026Feb 24, 2026View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
55,00069,589Feb 20, 2026Feb 24, 2026View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
247,500247,500Feb 20, 2026Feb 24, 2026View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
14,58914,589Feb 20, 2025Feb 21, 2025View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
66,13766,137Feb 20, 2025Feb 21, 2025View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
300,000300,000Aug 19, 2024Aug 20, 2024View →
LYEL
LYELL IMMUNOPHARMA, INC.
PURCHASEGRANT
Stock grant
700,000700,000Feb 24, 2023Feb 28, 2023View →
Other insiders · CRBU
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About this filer
CIK 0001917391
ROLE
Chief Medical Officer
PRIMARY
CRBU
COMPANIES
2
ACTIVE SINCE
Feb 2023
MARKETPEEL · /INSIDER/0001917391DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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