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STRO insider trading

SUTRO BIOPHARMA, INC. — open-market insider buys and $1M+ sells from SEC Forms 3, 4 and 5.
Insider buys · 24 mo
5
Bought · 24 mo
$90k
Buys · last 90 days
0 · $0
Most recent buy
2025-10-16

Cluster buy detected

5 insiders bought STRO within a short window (2025-10-15), $90k in total — cluster score 47/100. Members see the buyers, the score breakdown and the chart.

See the cluster

Recent insider filings

FiledInsiderTypeSharesPriceValue
2025-10-16Gerber Hans-Petercluster
CHIEF SCIENTIFIC OFFICER
Bought17,000$0.80$14k
2025-10-16Chow Gregory K.cluster
CFO
Bought19,750$0.81$16k
2025-10-16Chung Janecluster
Chief Executive Officer
Bought12,500$0.80$10k
2025-10-16MATSUI CONNIEcluster
Director
Bought50,000$0.80$40k
2025-10-16Pauling Davidcluster
Chief Admin. Ofcr. & GC
Bought12,504$0.80$10k

Most active insider buyers

InsiderRoleBuysTotal bought
MATSUI CONNIEDirector1$40k
Chow Gregory K.CFO1$16k
Gerber Hans-PeterCHIEF SCIENTIFIC OFFICER1$14k
Pauling DavidChief Admin. Ofcr. & GC1$10k
Chung JaneChief Executive Officer1$10k

See STRO on the chart

Every insider buy and sell for STRO plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.

Open the browserFree sample
Data from the SEC EDGAR ownership filings, refreshed daily. Only open-market purchases (transaction code P) and sales of $1M or more are shown; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Not investment advice.