Leon O Moulder Jr bought $770K of Zenas BioPharma (ZBIO)
Executed Oct 7 2025, disclosed Oct 9 2025, 2 days later.
Over the 21 trading sessions from the disclosed entry session (Oct 9 2025), the stock returned +23.8% (delay-adjusted); from the execution session (Oct 7 2025), +30.0%. Derived: entry at the session's open, exit at the close 20 sessions later.
Leon O Moulder Jr (See Remarks) filed 6 Form 4 reports in the trailing twelve months (6 purchases, 0 sales), most often in Zenas BioPharma, Inc. (ZBIO). Across 6 priced purchase filings, the average 21-session return was +16.6% from execution and +16.3% from disclosure (delay-adjusted; derived). The largest single filing was $1.6M of ZBIO (100,000 sh across 3 lots, as filed), executed Jan 7.
Healthcare · Zenas BioPharma, Inc., a clinical-stage biopharma company, engages in the development and commercialization of transformative immunology-ba…
More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→60,000 sh × $16.88
Exec May 18
Filed May 18 · 9:12 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $1.1M
60,000 sh across 2 lots
Exec Apr 28
Filed Apr 29 · 7:21 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $1.0M
54,000 sh across 2 lots
Exec Mar 30
Filed Mar 31 · 8:14 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $1.0M
57,000 sh × $17.96
Exec Feb 2
Filed Feb 3 · 4:30 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $1.6M
100,000 sh across 3 lots
Exec Jan 7
Filed Jan 9 · 9:42 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $167K
25,000 sh × $6.67
Exec Feb 18 2025
Filed Feb 19 2025 · 5:30 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $718K
70,000 sh across 2 lots
Exec Dec 3 2024
Filed Dec 4 2024 · 5:30 PM ET ZBIOPURCHASE Zenas BioPharma, Inc. $112K
7,500 sh × $15.00
Exec Nov 18 2024
Filed Nov 20 2024 · 5:30 PM ET