MarketPeel
Insider Trading Intelligence
HH

Heidi Hunter

STRO
DIRECTOR · SUTRO BIOPHARMA, INC. · CIK 0001891841
FILING MIX · LIFETIME100%/0%
BUYS
12
SELLS
0
TOTAL VALUE
$20.9K
COMPANIES
2
ACTIVE SINCE
Nov 2021
HOLDINGS NOW
45,144
AVG SELL PX
TRADE KIND
SHOWING 12 / 12
Trades · vs SPY
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Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 1 pending
Forward-return performance of every backtestable P/S trade by Heidi Hunter, 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%+12.68%+1.65%+11.02%+11.02%
14d1+0.00%-4.93%+1.29%-6.22%-6.22%
30d1+0.00%-2.11%+4.83%-6.94%-6.94%
60d1+100.00%+54.23%+7.78%+46.44%+46.44%
90d1+100.00%+11.27%+10.10%+1.17%+1.17%
180d1+0.00%-48.31%+15.32%-63.63%-63.63%
1y1+0.00%-99.81%
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
STRO · 10,000 shares · as of Jun 5, 2026
012,50025,00037,50050,00020222023202420252026SHARES 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
2026
FLOW · 12 buys / 0 sellsCOVERAGE · 19 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
10,00010,000Jun 5, 2026Jun 9, 2026View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
1,5001,500Dec 23, 2025Dec 29, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
50,00050,000Jun 6, 2025Jun 10, 2025View →
IOBT
IO BIOTECH, INC.
PURCHASEGRANT
Stock grant
35,14435,144Jun 5, 2025Jun 6, 2025View →
IOBT
IO BIOTECH, INC.
PURCHASE
15,000$1.39$20.9K15,000May 30, 2025Jun 2, 2025View →
IOBT
IO BIOTECH, INC.
PURCHASEGRANT
Stock grant
45,64245,642Jun 6, 2024Jun 7, 2024View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
35,00035,000Jun 6, 2024Jun 10, 2024View →
IOBT
IO BIOTECH, INC.
PURCHASEGRANT
Stock grant
64,23864,238Aug 11, 2023Aug 15, 2023View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
25,00025,000Jun 8, 2023Jun 12, 2023View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
18,50018,500Jun 6, 2022Jun 8, 2022View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
24,00024,000Nov 19, 2021Nov 22, 2021View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
9,8849,884Nov 19, 2021Nov 22, 2021View →
Other insiders · STRO
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About this filer
CIK 0001891841
ROLE
Director
PRIMARY
STRO
COMPANIES
2
ACTIVE SINCE
Nov 2021
MARKETPEEL · /INSIDER/0001891841DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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