MarketPeel
Insider Trading Intelligence
HG

Hans-peter Gerber

STRO
CHIEF SCIENTIFIC OFFICER · SUTRO BIOPHARMA, INC. · CIK 0001992979
FILING MIX · LIFETIME60%/40%
BUYS
15
SELLS
10
TOTAL VALUE
$119.4K
COMPANIES
1
ACTIVE SINCE
Sep 2023
HOLDINGS NOW
40,000
AVG SELL PX
$3.20
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 2 pending
Forward-return performance of every backtestable P/S trade by Hans-peter Gerber, 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%+48.72%+0.40%+48.32%+48.32%
14d1+100.00%+34.62%+3.34%+31.27%+31.27%
30d1+100.00%+15.38%+1.02%+14.37%+14.37%
60d1+100.00%+27.31%+2.34%+24.97%+24.97%
90d1+100.00%+36.28%+4.30%+31.98%+31.98%
180d1+100.00%+235.77%+3.15%+232.62%+232.62%
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
STRO · 40,000 shares · as of Mar 2, 2026
043,75087,500131,250175,000202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 15 buys / 10 sellsCOVERAGE · 11 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
2,84310,688Mar 2, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
1,170$20.55$24.0K9,518Mar 2, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
2,8438,532Mar 2, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
5,0005,000Mar 2, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
40,00040,000Mar 2, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
1,1258,308Mar 1, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
463$20.47$9.5K7,845Mar 1, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
1,1252,250Mar 1, 2026Mar 3, 2026View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
7,9257,925Dec 23, 2025Dec 29, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
17,000$0.80$13.6K71,832Oct 15, 2025Oct 16, 2025View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
37,50075,000Sep 18, 2025Sep 22, 2025View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
13,417$0.90$12.1K54,832Sep 18, 2025Sep 22, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
37,50068,249Sep 18, 2025Sep 22, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
113,750113,750Apr 4, 2025Apr 8, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
122,500122,500Apr 4, 2025Apr 8, 2025View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
4,621$1.59$7.3K30,749Mar 1, 2025Mar 4, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
11,25035,370Mar 1, 2025Mar 4, 2025View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
11,25033,750Mar 1, 2025Mar 4, 2025View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASE
CHIEF SCIENTIFIC OFFICER
37,50037,500Sep 18, 2024Sep 20, 2024View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
13,380$3.95$52.9K24,120Sep 18, 2024Sep 20, 2024View →
STRO
SUTRO BIOPHARMA, INC.
SALE
CHIEF SCIENTIFIC OFFICER
37,500112,500Sep 18, 2024Sep 20, 2024View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
60,00060,000Mar 5, 2024Mar 7, 2024View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
45,00045,000Mar 5, 2024Mar 7, 2024View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
150,000150,000Sep 18, 2023Sep 19, 2023View →
STRO
SUTRO BIOPHARMA, INC.
PURCHASEGRANT
Stock grant
175,000175,000Sep 18, 2023Sep 19, 2023View →
Other insiders · STRO
Loading peer insiders…
About this filer
CIK 0001992979
ROLE
CHIEF SCIENTIFIC OFFICER
PRIMARY
STRO
COMPANIES
1
ACTIVE SINCE
Sep 2023
MARKETPEEL · /INSIDER/0001992979DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

One short email. Insider buys, congressional trades, and plain-English analysis.

Feedback