InsiderTrades.com logo

O Jr Biography and Net Worth

CEO of Zenas BioPharma
  • Phone
  • Email
  • Website


O Jr is the CEO of Zenas BioPharma. They are 69 years old.

What is O Moulder Jr's net worth?

The estimated net worth of O Moulder Jr is at least $36.16 million as of April 28th, 2026. Jr owns 1,751,039 shares of Zenas BioPharma stock worth more than $36,158,955 as of May 11th. This net worth approximation does not reflect any other investments that Jr may own. Learn More about O Moulder Jr's net worth.

How do I contact O Moulder Jr?

The corporate mailing address for Jr and other Zenas BioPharma executives is 852 WINTER STREET, SUITE 250, WALTHAM, MA, 02451. Zenas BioPharma can also be reached via phone at (857) 271-2954 and via email at [email protected]. Learn More on O Moulder Jr's contact information.

Has O Moulder Jr been buying or selling shares of Zenas BioPharma?

Within the last three months, O Moulder Jr has bought $1,067,200.00 in Zenas BioPharma stock. Most recently, on Wednesday, April 29th, Leon O. Moulder, Jr. bought 35,000 shares of Zenas BioPharma stock. The stock was acquired at an average cost of $17.62 per share, with a total value of $616,700.00. Following the completion of the transaction, the chief executive officer now directly owns 1,786,039 shares of the company's stock, valued at $31,470,007.18. Learn More on O Moulder Jr's trading history.

Who are Zenas BioPharma's active insiders?

Zenas BioPharma's insider roster includes Patricia Allen (Director), Patrick Enright (Director), O Jr (CEO), and Hongbo Lu (Director). Learn More on Zenas BioPharma's active insiders.

Are insiders buying or selling shares of Zenas BioPharma?

In the last year, Zenas BioPharma insiders bought shares 18 times. They purchased a total of 1,339,648 shares worth more than $25,512,746.24. The most recent insider tranaction occured on April, 29th when CEO Leon O Moulder Jr bought 35,000 shares worth more than $616,700.00. Insiders at Zenas BioPharma own 22.0% of the company. Learn More about insider trades at Zenas BioPharma.

Information on this page was last updated on 4/29/2026.

O Moulder Jr Insider Trading History at Zenas BioPharma

Transaction DateBuy/SellNumber of SharesAverage Share PriceTotal TransactionShares Held After TransactionDetails
4/29/2026Buy35,000$17.62$616,700.001,786,039View SEC Filing Icon  
4/28/2026Buy25,000$18.02$450,500.001,751,039View SEC Filing Icon  
2/2/2026Buy57,000$17.96$1,023,720.00423,155View SEC Filing Icon  
1/9/2026Buy20,000$16.55$331,000.00366,155View SEC Filing Icon  
1/8/2026Buy30,000$16.30$489,000.00346,155View SEC Filing Icon  
1/7/2026Buy50,000$16.38$819,000.00316,155View SEC Filing Icon  
10/7/2025Buy36,928$20.85$769,948.8036,928View SEC Filing Icon  
See Full Table

O Moulder Jr Buying and Selling Activity at Zenas BioPharma

This chart shows Leon O Moulder Jr's buying and selling at Zenas BioPharma by year and by quarter.

Skip ChartChart Data in Insider Trading History Table

Zenas BioPharma Company Overview

Zenas BioPharma logo
Zenas BioPharma, Inc. is a clinical-stage global biopharmaceutical company, which engages in the development and commercialization of transformative immunology-based therapies for patients. The company was founded by Lonnie O. Moulder Jr on November 12, 2019 and is headquartered in Waltham, MA.
Read More

Today's Range

Now: $20.65
Low: $19.75
High: $21.09

50 Day Range

MA: $21.98
Low: $17.55
High: $26.36

2 Week Range

Now: $20.65
Low: $8.53
High: $44.60

Volume

79,664 shs

Average Volume

870,454 shs

Market Capitalization

$1.18 billion

P/E Ratio

N/A

Dividend Yield

N/A

Beta

N/A