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ZBIO - Zenas Biopharma, Inc.

Insider Purchase by Moulder Leon O Jr (CEO)

1 Month
After Trade
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Trade Summary

4 days ago, Moulder Leon O Jr, serving as CEO at Zenas Biopharma, Inc. (ZBIO), purchased 60,000 shares at $17.79 per share, for a total transaction value of $1,067,200.00. Following this transaction, Moulder Leon O Jr now holds 2,246,122 shares of ZBIO.

This purchase represents a 3.00% increase in Moulder Leon O Jr's stake in the company. This is considered a medium-conviction trade.

The trade was executed on Tuesday, April 28, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, April 29, 2026, 1 day after the trade was made.

Zenas 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.

Moulder Leon O Jr

Moulder Leon O Jr

CEO

Leon O. Moulder, Jr. (age 67) is the Founder, Chief Executive Officer since August 2023, and Chairman of the Board since 2020 at Zenas BioPharma, Inc. (NASDAQ: ZBIO), a biopharmaceutical company focused on autoimmune diseases.[[1]](https://fintool.com/app/research/companies/ZBIO/people/leon-o-moulder-jr)[[4]](https://zenasbio.com/who-we-are/) He holds a Pharmacy degree from Temple University and an MBA from the University of Chicago Booth School of Business.[[1]](https://fintool.com/app/research/companies/ZBIO/people/leon-o-moulder-jr)[[6]](https://interiusbio.com/team/lonnie-moulder/) Moulder began his career as a clinical pharmacist, followed by a 17-year tenure at predecessor companies of Sanofi, including Marion Laboratories, building commercial and operational expertise.[[1]](https://fintool.com/app/research/companies/ZBIO/people/leon-o-moulder-jr)[[6]](https://interiusbio.com/team/lonnie-moulder/) Moulder's career highlights include serving as President and CEO of MGI PHARMA (later acquired by Eisai), President, CEO, and Vice Chairman of Abraxis BioScience, and co-founding TESARO, Inc., where he led as CEO from 2010 until its $5.5 billion acquisition by GSK in 2019.[[1]](https://fintool.com/app/research/companies/ZBIO/people/leon-o-moulder-jr)[[6]](https://interiusbio.com/team/lonnie-moulder/)[[7]](https://www.chicagobooth.edu/alumni/distinguished-alumni-award/honorees/lonnie-moulder) Since March 2019, he has been Managing Member of Tellus BioVentures, LLC, with board roles at Zai Lab Ltd., Dianthus Therapeutics, and others.[[1]](https://fintool.com/app/research/companies/ZBIO/people/leon-o-moulder-jr)[[6]](https://interiusbio.com/team/lonnie-moulder/) Recently, as ZBIO CEO, he purchased $1.639 million in company stock (100,000 shares) between January 7-9, 2026, increasing his direct ownership to 366,155 shares.[[2]](https://www.investing.com/news/insider-trading-news/zenas-biopharma-zbio-ceo-moulder-buys-163m-in-stock-93CH-4440532)[[3]](https://longbridge.com/en/news/272141676)[[5]](https://www.tradingview.com/news/tradingview:a8f1e09abc733:0-zenas-biopharma-ceo-leon-o-moulder-jr-acquires-100-000-shares/)

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Trade Price

$17.79

Quantity

60,000

Total Value

$1,067,200.00

Shares Owned

2,246,122

Trade Date

Tuesday, April 28, 2026

4 days ago

SEC Filing Date

Wednesday, April 29, 2026

Filed 1 day after trade

HEALTHCAREBIOTECHNOLOGY

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