Sutro Biopharma, Inc. Insider Trading

STRO

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Last 12 months

No open-market buying or selling by insiders.

The last open-market buy by an executive or director was in Oct 2025.

Net open-market

0 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

0 / 0

executives and directors

Last open-market buy

Oct 2025

Oct 15, 2025

Get an email when STRO's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 15, 2025	David Pauling Chief Admin. Ofcr. & GC	Bought	12,504	$0.80	10K	21%	Form 4
Oct 15, 2025	Hans-Peter Gerber Chief Scientific Officer	Bought	17,000	$0.80	14K	31%	Form 4
Oct 15, 2025	Jane Chung Chief Executive Officer	Bought	12,500	$0.80	10K	11%	Form 4
Oct 15, 2025	Gregory K. Chow CFO	Bought	19,750	$0.81	16K	New	Form 4
Oct 15, 2025	Connie Matsui Director	Bought	50,000	$0.80	40K	New	Form 4

Oct 15, 2025
David Pauling
Chief Admin. Ofcr. & GC · bought 12,504 at $0.80
10K
21% of stake
Oct 15, 2025
Hans-Peter Gerber
Chief Scientific Officer · bought 17,000 at $0.80
14K
31% of stake
Oct 15, 2025
Jane Chung
Chief Executive Officer · bought 12,500 at $0.80
10K
11% of stake
Oct 15, 2025
Gregory K. Chow
CFO · bought 19,750 at $0.81
16K
New position
Oct 15, 2025
Connie Matsui
Director · bought 50,000 at $0.80
40K
New position

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch STRO, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

STRO is in 5 US ETFs. The largest of them, with STRO's weight in each:

Spot a number that looks wrong? Check it in STRO's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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