Company filings profile · CIK 0001953926
Zenas BioPharma, Inc. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Zenas BioPharma, Inc. (ZBIO): 13 filings in the last 90 days vs 15 in the prior 90 (filing-velocity steady · 0.87×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Oct 13, 2026. Source-linked, daily-refreshed.
Material 8-K events — Zenas BioPharma, Inc.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Oct 13, 2026 | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Aug 13, 2026 | Results of Operations (earnings); Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| May 13, 2026 | Results of Operations (earnings); Departure/Election of Directors or Officers; Item 5.07; Financial Statements and Exhibits | ↗ |
| Mar 31, 2026 | Entry into a Material Agreement; Material Direct Financial Obligation; Other Events; Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Oct 13, 2026 | 8-K | Regulation FD Disclosure; Financial Statements and Exhibits | ↗ |
| Sep 11, 2026 | S-3ASR | S-3ASR | ↗ |
| Sep 11, 2026 | S-8 | FORM S-8 | ↗ |
| Sep 8, 2026 | SCHEDULE 13G | ↗ | |
| Sep 8, 2026 | 3 | ↗ | |
| Sep 8, 2026 | SCHEDULE 13G/A | ↗ | |
| Sep 2, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Sep 2, 2026 | 3 | OWNERSHIP DOCUMENT | ↗ |
| Aug 19, 2026 | SCHEDULE 13D/A | ↗ | |
| Aug 19, 2026 | 144 | ↗ | |
| Aug 17, 2026 | SCHEDULE 13D/A | ↗ | |
| Aug 13, 2026 | 10-Q | 10-Q | ↗ |
| Aug 13, 2026 | 8-K | Results of Operations (earnings); Departure/Election of Directors or Officers; Financial Statements and Exhibits | ↗ |
| Jun 17, 2026 | 4 | 4 | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Jun 17, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| May 18, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| May 13, 2026 | 10-Q | 10-Q | ↗ |
| May 13, 2026 | 8-K | Results of Operations (earnings); Departure/Election of Directors or Officers; Item 5.07; Financial Statements and Exhibits | ↗ |
| May 5, 2026 | SCHEDULE 13D | ↗ | |
| Apr 29, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Apr 2, 2026 | SCHEDULE 13D/A | ↗ | |
| Apr 2, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Apr 1, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Mar 31, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Mar 31, 2026 | 4 | OWNERSHIP DOCUMENT | ↗ |
| Mar 31, 2026 | 8-K | Entry into a Material Agreement; Material Direct Financial Obligation; Other Events; Financial Statements and Exhibits | ↗ |
| Mar 30, 2026 | 424B5 | 424B5 | ↗ |
| Mar 30, 2026 | 424B5 | 424B5 | ↗ |
| Mar 27, 2026 | FWP | FWP | ↗ |
| Mar 27, 2026 | FWP | FWP | ↗ |
| Mar 26, 2026 | 424B5 | 424B5 | ↗ |
| Mar 26, 2026 | 424B5 | 424B5 | ↗ |