Leon O Moulder Jr insider trades: Zenas BioPharma (ZBIO) stock purchases
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Leon reports to the SEC
and 2 more companies
Open-market buys and sales
17 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| May 18, 2026 | ZBIO | ↑ Buy | 60,000 | $16.88 | $1.0M | Indirect | May 18, 2026 (0d) |
| Apr 29, 2026 | ZBIO | ↑ Buy | 60,000 | $17.79 | $1.1M | Indirect | Apr 29, 2026 (0d) |
| Mar 31, 2026 | ZBIO | ↑ Buy | 54,000 | $18.91 | $1.0M | Indirect | Mar 31, 2026 (0d) |
| Feb 2, 2026 | ZBIO | ↑ Buy | 57,000 | $17.96 | $1.0M | Direct | Feb 3, 2026 (1d) |
| Jan 9, 2026 | ZBIO | ↑ Buy | 100,000 | $16.39 | $1.6M | Direct | Jan 9, 2026 (0d) |
| Oct 7, 2025 | ZBIO | ↑ Buy | 36,928 | $20.85 | $770K | Indirect | Oct 9, 2025 (2d) |
| Feb 18, 2025 | ZBIO | ↑ Buy | 25,000 | $6.67 | $167K | Direct | Feb 19, 2025 (1d) |
| Dec 4, 2024 | ZBIO | ↑ Buy | 70,000 | $10.26 | $718K | Direct | Dec 4, 2024 (0d) |
| Nov 19, 2024 | ZBIO | ↑ Buy | 10,000 | $14.89 | $149K | Direct | Nov 20, 2024 (1d) |
| Sep 20, 2024 | ZBIO | ↑ Buy | 20,000 | $18.04 | $361K | Indirect | Sep 20, 2024 (0d) |
| Feb 1, 2019 | TRVN | ↑ Buy | 100,000 | $1.02 | $102K | By Trust | Feb 4, 2019 (3d) |
| Mar 2, 2018 | TSRO | ↑ Buy | 5,000 | $56.93 | $285K | By The Leon Moulder Revocable Trust | Mar 5, 2018 (3d) |
| Dec 10, 2014 | TRVN | ↑ Buy | 50,000 | $4.00 | $200K | Direct | Dec 10, 2014 (0d) |
| Aug 30, 2012 | TSRO | ↑ Buy | 10,000 | $11.69 | $117K | Direct | Aug 31, 2012 (1d) |
| Nov 4, 2011 | CBST | ↑ Buy | 5,000 | $36.78 | $184K | Direct | Nov 8, 2011 (4d) |
| Aug 4, 2006 | MOGN | ↑ Buy | 2,000 | $14.16 | $28K | Direct | Aug 7, 2006 (3d) |
| Oct 27, 2005 | MOGN | ↑ Buy | 2,000 | $18.84 | $38K | Direct | Oct 28, 2005 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ZBIO insiders
Open-market trades in the last 12 months
About Leon O Moulder Jr's insider trades
Leon O Moulder Jr is See Remarks at Zenas BioPharma (ZBIO). Since Oct 27, 2005, Leon has reported 17 open-market purchases worth $8.9M and no sales on SEC Form 4. In the last 12 months: 5 buys ($5.8M).
Their filings also include grants and awards (39 filings), option exercises (4 filings), shares returned to the company (3 filings), other transactions (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ZBIO insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.