# Zenas BioPharma, Inc.: filings

ZBIO · Nasdaq · CIK 1953926 · [Healthcare](/sectors/healthcare.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/zbio.md) · [Financials](/companies/zbio/financials.md) · [Filings](/companies/zbio/filings.md) · [Insiders](/companies/zbio/insiders.md)

## Reports and events: 45 filings

Newest first, by EDGAR acceptance time (Eastern). Filter with ?form= one of: `periodic`, `8-K`, `10-K`, `10-Q`, `4`, `proxy`, `13dg`, `all`, or any form this company filed (4 62, 8-K 20, 3 19, SCHEDULE 13D/A 7, 10-Q 6, S-8 6, SCHEDULE 13G/A 6, DRSLTR 5, UPLOAD 5, 424B5 4, 4/A 3, CORRESP 3, DRS/A 3, FWP 3, S-3ASR 3, SC 13D 3, SCHEDULE 13D 3, SCHEDULE 13G 3, 10-K 2, ARS 2, D 2, DEF 14A 2, DEFA14A 2, SC 13G 2, SEC STAFF LETTER 2, 144 1, 424B4 1, 424B7 1, 8-A12B 1, CERT 1, DRS 1, EFFECT 1, S-1 1, S-1/A 1, S-1MEF 1).

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-13 | 06:01 ET | [8-K](/filings/0001104659-26-115151.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-115151 |
| 2026-08-19 | 18:49 ET | [SCHEDULE 13D/A](/filings/0001953107-26-000015.md) | Ownership report, active investor, amended | 0001953107-26-000015 |
| 2026-08-17 | 18:59 ET | [SCHEDULE 13D/A](/filings/0001072613-26-000694.md) | Ownership report, active investor, amended | 0001072613-26-000694 |
| 2026-08-13 | 07:15 ET | [10-Q](/filings/0001104659-26-095448.md) | Quarterly report, period 2026-06-30 | 0001104659-26-095448 |
| 2026-08-13 | 07:05 ET | [8-K](/filings/0001104659-26-095437.md) | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001104659-26-095437 |
| 2026-05-13 | 06:36 ET | [10-Q](/filings/0001104659-26-059735.md) | Quarterly report, period 2026-03-31 | 0001104659-26-059735 |
| 2026-05-13 | 06:14 ET | [8-K](/filings/0001104659-26-059700.md) | 2.02 Results of operations; 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001104659-26-059700 |
| 2026-05-05 | 16:15 ET | [SCHEDULE 13D](/filings/0001104659-26-055643.md) | Ownership report, active investor | 0001104659-26-055643 |
| 2026-04-02 | 17:44 ET | [SCHEDULE 13D/A](/filings/0001104659-26-039279.md) | Ownership report, active investor, amended | 0001104659-26-039279 |
| 2026-03-31 | 16:35 ET | [8-K](/filings/0001104659-26-037821.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-037821 |
| 2026-03-16 | 08:25 ET | [DEF 14A](/filings/0001104659-26-028062.md) | Proxy statement, period 2026-05-11 | 0001104659-26-028062 |
| 2026-03-16 | 07:26 ET | [10-K](/filings/0001104659-26-027964.md) | Annual report, period 2025-12-31 | 0001104659-26-027964 |
| 2026-03-16 | 07:17 ET | [8-K](/filings/0001104659-26-027961.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-26-027961 |
| 2026-02-13 | 16:58 ET | [8-K](/filings/0001104659-26-015314.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001104659-26-015314 |
| 2026-01-14 | 16:30 ET | [SCHEDULE 13D](/filings/0001104659-26-003758.md) | Ownership report, active investor | 0001104659-26-003758 |
| 2026-01-05 | 07:16 ET | [8-K](/filings/0001104659-26-000402.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-000402 |
| 2025-12-15 | 16:30 ET | [8-K](/filings/0001104659-25-121182.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001104659-25-121182 |
| 2025-11-12 | 07:20 ET | [10-Q](/filings/0001104659-25-109753.md) | Quarterly report, period 2025-09-30 | 0001104659-25-109753 |
| 2025-11-12 | 07:12 ET | [8-K](/filings/0001104659-25-109737.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-25-109737 |
| 2025-10-27 | 07:19 ET | [8-K](/filings/0001104659-25-102317.md) | 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-102317 |
| 2025-10-14 | 17:29 ET | [SCHEDULE 13D/A](/filings/0001953107-25-000010.md) | Ownership report, active investor, amended | 0001953107-25-000010 |
| 2025-10-14 | 17:29 ET | [SCHEDULE 13D/A](/filings/0001193125-25-239173.md) | Ownership report, active investor, amended | 0001193125-25-239173 |
| 2025-10-14 | 09:35 ET | [SCHEDULE 13D/A](/filings/0001193125-25-238370.md) | Ownership report, active investor, amended | 0001193125-25-238370 |
| 2025-10-09 | 17:15 ET | [SCHEDULE 13D/A](/filings/0001104659-25-098408.md) | Ownership report, active investor, amended | 0001104659-25-098408 |
| 2025-10-08 | 06:01 ET | [8-K](/filings/0001104659-25-097663.md) | 1.01 Entry into a material agreement; 2.02 Results of operations; 3.02 Unregistered sale of equity; 7.01 Regulation FD disclosure; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-25-097663 |
| 2025-09-02 | 07:15 ET | [8-K](/filings/0001104659-25-085982.md) | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-085982 |
| 2025-08-12 | 07:23 ET | [10-Q](/filings/0001558370-25-011147.md) | Quarterly report, period 2025-06-30 | 0001558370-25-011147 |
| 2025-08-12 | 07:13 ET | [8-K](/filings/0001104659-25-076464.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-25-076464 |
| 2025-06-12 | 16:19 ET | [8-K](/filings/0001104659-25-058892.md) | 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results | 0001104659-25-058892 |
| 2025-06-06 | 16:10 ET | [SCHEDULE 13D](/filings/0001104659-25-057322.md) | Ownership report, active investor | 0001104659-25-057322 |
| 2025-06-04 | 06:56 ET | [8-K](/filings/0001104659-25-056215.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-25-056215 |
| 2025-05-15 | 07:25 ET | [10-Q](/filings/0001558370-25-007803.md) | Quarterly report, period 2025-03-31 | 0001558370-25-007803 |
| 2025-05-15 | 07:14 ET | [8-K](/filings/0001104659-25-048948.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-25-048948 |
| 2025-04-28 | 07:00 ET | [DEF 14A](/filings/0001104659-25-039765.md) | Proxy statement, period 2025-06-10 | 0001104659-25-039765 |
| 2025-03-11 | 06:15 ET | [10-K](/filings/0001558370-25-002631.md) | Annual report, period 2024-12-31 | 0001558370-25-002631 |
| 2025-02-05 | 07:17 ET | [8-K](/filings/0001104659-25-009368.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-25-009368 |
| 2024-12-02 | 16:34 ET | [8-K](/filings/0001104659-24-124616.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-24-124616 |
| 2024-11-12 | 07:39 ET | [10-Q](/filings/0001558370-24-015162.md) | Quarterly report, period 2024-09-30 | 0001558370-24-015162 |
| 2024-11-12 | 07:17 ET | [8-K](/filings/0001104659-24-116346.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001104659-24-116346 |
| 2024-09-23 | 20:56 ET | [SC 13D](/filings/0001193125-24-223899.md) | Ownership report, active investor | 0001193125-24-223899 |
| 2024-09-23 | 20:11 ET | [SC 13D](/filings/0001193125-24-223879.md) | Ownership report, active investor | 0001193125-24-223879 |
| 2024-09-23 | 16:16 ET | [SC 13D](/filings/0001104659-24-102046.md) | Ownership report, active investor | 0001104659-24-102046 |
| 2024-09-16 | 16:04 ET | [8-K](/filings/0001104659-24-100177.md) | 5.03 Amendment to articles or bylaws; 9.01 Financial statements and exhibits | 0001104659-24-100177 |
| 2024-09-06 | 06:10 ET | [S-1/A](/filings/0001104659-24-097538.md) | Registration statement, amended | 0001104659-24-097538 |
| 2024-08-22 | 14:41 ET | [S-1](/filings/0001104659-24-091950.md) | Registration statement | 0001104659-24-091950 |

Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 27, 2026, 17:29 ET. No prices; not investment advice.