Quick Takeaways
- Leon O Moulder Jr. has 4 issuer positions tracked on this page.
- Estimated disclosed ownership value: $67,253,371.
- Recent insider filing activity is available below.
- Info
- Significant Ownership
- Insider Ownership
Insider Trading & Ownership of Leon O Moulder Jr.
- Location
- Waltham, MA
- Summary
- The estimated net worth of Leon O Moulder Jr. is at least $67,253,371 dollars as of 31 Mar 2026. Leon O Moulder Jr. is the Chief Executive Officer, Director of Zenas BioPharma, Inc. and owns shares of Zenas BioPharma, Inc. (ZBIO) stock worth about $48.69M. Leon O Moulder Jr. is the Director of Dianthus Therapeutics, Inc. /DE/ and owns shares of Dianthus Therapeutics, Inc. /DE/ (DNTH) stock worth about $17.24M. Leon O Moulder Jr. is the Director of Zai Lab Ltd and owns shares of Zai Lab Ltd (ZLAB) stock worth about $1.32M.
- Signature
- By: /s/ Chase Jayasekera, Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Leon O Moulder Jr. and return when a new Insider Trading filing appears.
This tracks SEC filing changes for this page using existing product update flows.
What Changed
- Largest disclosed position: Zenas BioPharma, Inc. ($48,694,571).
- Past-year value change for that position: +$4,453,809.
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Official SEC Source
Filed on Form 4
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
See Original FilingOwnership of Leon O Moulder Jr.
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| ZBIO | Zenas BioPharma, Inc. | Chief Executive Officer, Director | $48,694,571 | +$4,453,809 | +10% | 30 Mar 2026 |
| DNTH | Dianthus Therapeutics, Inc. /DE/ | Director | $17,240,940 | 23 May 2024 | ||
| ZLAB | Zai Lab Ltd | Director | $1,317,860 | 18 Jun 2025 | ||
| TRVN | TREVENA INC | Director | 15 Jun 2023 |
Insider Transactions Reported by Leon O Moulder Jr.:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.