Quick Takeaways
- Leon O Moulder Jr. filed SCHEDULE 13D/A for Zenas BioPharma, Inc. Common Stock, $0.0001 par value per share (ZBIO).
- Disclosed ownership: 4.8%.
- Date of event: 07 Oct 2025.
Leon O Moulder Jr. - 07 Oct 2025 SCHEDULE 13D/A Report for Zenas BioPharma, Inc. Common Stock, $0.0001 par value per share (ZBIO)
- Filing Manager
- Leon O Moulder Jr.
- Reporting Manager
- Leon O. Moulder, Jr.
- Symbol
- ZBIO
- Shares outstanding
- 54,055,458 shares
- Disclosed Ownership
- 2,594,662 shares
- Ownership
- 4.8%
- Form type
- SCHEDULE 13D/A
- Filing time
- 09 Oct 2025, 17:15:38 UTC
- Date of event
- 07 Oct 2025
- Previous filing
- 06 Jun 2025
- Next filing
- 14 Jan 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Leon O Moulder Jr. disclosed 4.8% ownership in Zenas BioPharma, Inc. Common Stock, $0.0001 par value per share (ZBIO) on 07 Oct 2025."
What Changed
- Previous schedule filing date: 06 Jun 2025.
- Current filing was accepted on 09 Oct 2025, 17:15.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (3)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Leon O. Moulder, Jr. | 4.8% | 2,594,662 | 885,695 | 1,708,967 | /s/ Leon O. Moulder, Jr. | Leon O. Moulder, Jr. | 0001228865 |
| Tellus BioVentures, LLC | 3.1% | 1,672,039 | 0 | 1,672,039 | /s / Leon O. Moulder, Jr. | Leon O. Moulder, Jr., Managing Member | |
| Leon O. Moulder, Jr. Revocable Trust U/A dtd 9/9/2008 | 0.1% | 36,928 | 0 | 36,928 | /s / Leon O. Moulder, Jr. | Leon O. Moulder, Jr., Trustee |