Company · CIK 1953926

# Zenas BioPharma, Inc.

| CIK | [1953926](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001953926) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 2834 — Pharmaceutical Preparations |
| Incorporated in | DE |
| Business address | MA |
| Listed | ZBIO (Nasdaq) |
| First annual or quarterly report | 2024-11-12 |

## Offerings

 4 registrations

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-298895 | Shelf Effective | 2026-09-11 | 2026-09-11 | 1 |
| 333-290777 | Shelf Effective | 2025-10-08 | 2026-03-30 | 5 |
| 333-290999 | Shelf Effective | 2025-10-21 | 2025-10-21 | 1 |
| 333-281713 | IPO Final prospectus | 2024-08-22 | 2024-09-13 | 4 |

## Filings

 12

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2026-09-11 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1953926/000110465926107108/0001104659-26-107108-index.htm) Shelf registered | 333-298895 | 0001104659-26-107108 |
| 2026-03-30 | [424B5](https://www.sec.gov/Archives/edgar/data/1953926/000110465926036536/0001104659-26-036536-index.htm) Shelf takedown | 333-290777 | 0001104659-26-036536 |
| 2026-03-30 | [424B5](https://www.sec.gov/Archives/edgar/data/1953926/000110465926036534/0001104659-26-036534-index.htm) Shelf takedown | 333-290777 | 0001104659-26-036534 |
| 2026-03-26 | [424B5](https://www.sec.gov/Archives/edgar/data/1953926/000110465926035241/0001104659-26-035241-index.htm) Shelf takedown | 333-290777 | 0001104659-26-035241 |
| 2026-03-26 | [424B5](https://www.sec.gov/Archives/edgar/data/1953926/000110465926035237/0001104659-26-035237-index.htm) Shelf takedown | 333-290777 | 0001104659-26-035237 |
| 2025-10-21 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1953926/000110465925101271/0001104659-25-101271-index.htm) Shelf registered | 333-290999 | 0001104659-25-101271 |
| 2025-10-08 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1953926/000110465925097950/0001104659-25-097950-index.htm) Shelf registered | 333-290777 | 0001104659-25-097950 |
| 2024-09-13 | [424B4](https://www.sec.gov/Archives/edgar/data/1953926/000110465924099805/0001104659-24-099805-index.htm) Final prospectus | 333-281713 | 0001104659-24-099805 |
| 2024-09-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1953926/999999999524002815/9999999995-24-002815-index.htm) Declared effective | 333-281713 | 9999999995-24-002815 |
| 2024-09-06 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1953926/000110465924097538/0001104659-24-097538-index.htm) Amendment | 333-281713 | 0001104659-24-097538 |
| 2024-08-22 | [S-1](https://www.sec.gov/Archives/edgar/data/1953926/000110465924091950/0001104659-24-091950-index.htm) Registration filed | 333-281713 | 0001104659-24-091950 |
| 2024-01-25 | [DRS](https://www.sec.gov/Archives/edgar/data/1953926/000110465924006759/0001104659-24-006759-index.htm) Draft made public | 377-07069 | 0001104659-24-006759 |

[All filings of this company](https://equitycapital.markets/filings?cik=1953926) · [CSV](https://equitycapital.markets/filings.csv?cik=1953926)

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Source page: https://equitycapital.markets/company/1953926 · Data: U.S. SEC EDGAR · CC BY 4.0