MarketPeel
Insider Trading Intelligence
RH

Rachel E. Haurwitz

CRBU
PRESIDENT AND CEO · CARIBOU BIOSCIENCES, INC. · CIK 0001670579
FILING MIX · LIFETIME80%/20%
BUYS
20
SELLS
5
TOTAL VALUE
$168.4K
COMPANIES
2
ACTIVE SINCE
Nov 2021
HOLDINGS NOW
534,765
AVG SELL PX
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 1 pending
Forward-return performance of every backtestable P/S trade by Rachel E. Haurwitz, 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%+2.97%+0.51%+2.46%+2.46%
14d1+0.00%-7.02%-0.97%-6.05%-6.05%
30d1+0.00%-20.79%-3.92%-16.87%-16.87%
60d1+0.00%-22.48%+4.58%-27.06%-27.06%
90d1+100.00%+14.85%+7.60%+7.25%+7.25%
180d1+100.00%+76.24%+16.23%+60.01%+60.01%
1y1+100.00%+86.14%+18.03%+68.11%+68.11%
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 · 447,150 shares · as of Feb 20, 2026
0842,3491,684,6982,527,0463,369,39520222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 20 buys / 5 sellsCOVERAGE · 18 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
682,500682,500Feb 20, 2026Feb 20, 2026View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
151,700447,150Feb 20, 2026Feb 20, 2026View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
20,000$1.02$20.4K3,369,395Mar 14, 2025Mar 17, 2025View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
618,250618,250Feb 20, 2025Feb 21, 2025View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
136,750295,450Feb 20, 2025Feb 21, 2025View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
58,17887,615Jun 12, 2024Jun 14, 2024View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
546,950546,950Feb 20, 2024Feb 22, 2024View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
118,700158,700Feb 20, 2024Feb 22, 2024View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
34,73534,735Jun 14, 2023Jun 16, 2023View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
23,44329,437Jun 14, 2023Jun 16, 2023View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
10,000$2.96$29.6K40,000Jun 8, 2023Jun 9, 2023View →
CRBU
CARIBOU BIOSCIENCES, INC.
SALE
President and CEO
10,00096,350Jun 8, 2023Jun 9, 2023View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
10,000$2.96$29.6K30,000Mar 20, 2023Mar 22, 2023View →
CRBU
CARIBOU BIOSCIENCES, INC.
SALE
President and CEO
10,000106,350Mar 20, 2023Mar 22, 2023View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
510,500510,500Feb 21, 2023Feb 23, 2023View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
5,9945,994Jun 15, 2022Jun 17, 2022View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
17,86517,865Jun 15, 2022Jun 17, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
10,000$2.96$29.6K20,000May 9, 2022May 10, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
SALE
President and CEO
10,000116,350May 9, 2022May 10, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
10,000$2.96$29.6K10,000Jan 26, 2022May 10, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
SALE
President and CEO
10,000126,350Jan 26, 2022May 10, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASE
President and CEO
10,000$2.96$29.6K3,359,395Jan 26, 2022Jan 27, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
SALE
President and CEO
10,000126,350Jan 26, 2022Jan 27, 2022View →
CRBU
CARIBOU BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
411,000411,000Dec 20, 2021Dec 21, 2021View →
SEER
SEER, INC.
PURCHASEGRANT
Stock grant
30,00030,000Nov 9, 2021Nov 12, 2021View →
Other insiders · CRBU
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About this filer
CIK 0001670579
ROLE
President and CEO
PRIMARY
CRBU
COMPANIES
2
ACTIVE SINCE
Nov 2021
MARKETPEEL · /INSIDER/0001670579DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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