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STRO - Sutro Biopharma, Inc.

Insider Purchase by Matsui Connie (Dir)

6 Months
After Trade
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Trade Summary

4 months ago, Matsui Connie, serving as Dir at Sutro Biopharma, Inc. (STRO), purchased 50,000 shares at $0.80 per share, for a total transaction value of $39,950.00. Following this transaction, Matsui Connie now holds 50,000 shares of STRO.

The trade was executed on Wednesday, October 15, 2025 and publicly disclosed via SEC Form 4 filing on Thursday, October 16, 2025, 1 day after the trade was made.

Sutro Biopharma, Inc. operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.

Matsui Connie

Dir

Connie Matsui is an accomplished biopharma executive serving as the Chair of the Board of Directors at Sutro Biopharma, Inc. (NASDAQ: STRO), a position she has held since June 2019.[[1]](https://www.prnewswire.com/news-releases/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair-300873679.html)[[4]](https://fintool.com/app/research/companies/STRO/people/connie-matsui)[[7]](https://www.sutrobio.com/leadership/board-of-directors/) As an independent Class II director, she chairs the Nominating and Governance Committee and serves on the Compensation Committee.[[1]](https://www.prnewswire.com/news-releases/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair-300873679.html)[[3]](https://www.sutrobio.com/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair/) Recently, on October 15, 2025, she purchased 50,000 shares of STRO stock at $0.799 per share, signaling confidence in the company.[[8]](https://www.investing.com/news/insider-trading-news/sutro-biopharma-director-matsui-buys-39950-in-stock-93CH-4292199) Matsui brings over 35 years of leadership across banking, biotechnology, and nonprofit sectors, including more than 16 years in biotech general management.[[1]](https://www.prnewswire.com/news-releases/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair-300873679.html)[[2]](https://www.adcreview.com/business-economics/sutro-biopharma-appoints-former-biogen-idec-executive-connie-matsui-as-board-chair/) She retired in January 2009 as Executive Vice President, Knowledge and Innovation Networks at Biogen Idec Inc., after serving on its Executive Committee and previously at IDEC Pharmaceuticals since 1992 in roles such as Senior Vice President overseeing investor relations, corporate communications, human resources, project management, and strategic planning.[[1]](https://www.prnewswire.com/news-releases/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair-300873679.html)[[2]](https://www.adcreview.com/business-economics/sutro-biopharma-appoints-former-biogen-idec-executive-connie-matsui-as-board-chair/)[[4]](https://fintool.com/app/research/companies/STRO/people/connie-matsui) Key highlights include serving as Collaboration Chair for the development and commercialization of rituximab (Rituxan®/MabThera®) with Roche and Genentech, and Project Leader for Zevalin®, the first FDA-approved radioimmunotherapy.[[1]](https://www.prnewswire.com/news-releases/sutro-biopharma-appoints-biopharma-veteran-connie-matsui-as-board-chair-300873679.html)[[2]](https://www.adcreview.com/business-economics/sutro-biopharma-appoints-former-biogen-idec-executive-connie-matsui-as-board-chair/) She holds a B.A. and M.B.A. from Stanford University and currently also chairs the board at Artelo Biosciences while having served on Halozyme Therapeutics' board from 2006 to 2025.[[4]](https://fintool.com/app/research/companies/STRO/people/connie-matsui)[[5]](https://artelobio.com/board/)[[6]](https://www.sdfoundation.org/news-events/sdf-news/connie-matsuis-lifelong-dedication-powers-san-diego-foundations-future/)

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Trade Price

$0.80

Quantity

50,000

Total Value

$39,950.00

Shares Owned

50,000

Trade Date

Wednesday, October 15, 2025

129 days ago

SEC Filing Date

Thursday, October 16, 2025

Filed 1 day after trade

HEALTHCAREBIOTECHNOLOGY

About Sutro Biopharma, Inc.

Company Overview

No company information available
View news mentioning STRO

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