ZBIO · Nasdaq · CIK 0001953926

Zenas BioPharma, Inc.

Zenas BioPharma, Inc.’s most recent SEC filing in our snapshot is a Form SCHEDULE 13G filed on Oct 27, 2026. In fiscal 2025 (year ended Dec 31, 2025) it reported revenue of $10.0M and net income of -$377.7M, according to its XBRL data on EDGAR. Its EDGAR record lists 21 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2025
$10.0M
Net income, FY2025
-$377.7M
Form 4 filings on record, past 12 months
21

Company overview

Legal name (as filed)
Zenas BioPharma, Inc.
Ticker
ZBIO
SEC Central Index Key (CIK)
0001953926
Industry (SIC)
Pharmaceutical Preparations (code 2834)
Business address
WALTHAM, MA
State or country of incorporation
DE
Fiscal year ends
December 31
SEC filer category
<br>Emerging growth company
Position in SEC ticker list
#2039 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from Zenas BioPharma, Inc.’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in U.S. dollars; the fiscal year is named for the calendar year in which it ends.

Revenue
$50.0MFY2023$5.0MFY2024$10.0MFY2025
Net income
-$37.1MFY2023-$157.0MFY2024-$377.7MFY2025
ZBIO annual results
ItemFY2023
ended Dec 31, 2023		FY2024
ended Dec 31, 2024		FY2025
ended Dec 31, 2025
Revenue$50.0M$5.0M$10.0M
Net income-$37.1M-$157.0M-$377.7M
Diluted EPS-$24.25-$11.89-$8.44
Total assets$68.2M$370.0M$383.6M
Cash and equivalents$56.9M$319.7M$110.6M

XBRL tags used: revenue = Revenues; netIncome = NetIncomeLoss; assets = Assets; eps = EarningsPerShareDiluted; cash = CashAndCashEquivalentsAtCarryingValue. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

ZBIO latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Mar 16, 202610-KAnnual report· period Dec 31, 2025Document · Index
Aug 13, 202610-QQuarterly report· period Jun 30, 2026Document · Index
Oct 13, 20268-KRegulation FD disclosure· period Oct 12, 2026Document · Index
Mar 16, 2026DEF 14ADefinitive proxy statement· period May 11, 2026Document · Index

Recent SEC filings

The 40 newest documents filed by or about Zenas BioPharma, Inc., by form type:

4 ×178-K ×4SCHEDULE 13D/A ×3424B5 ×33 ×2SCHEDULE 13G ×210-Q ×2FWP ×2144 ×1S-3ASR ×1S-8 ×1SCHEDULE 13G/A ×1SCHEDULE 13D ×1
ZBIO recent filings
FiledFormWhat it isOriginal
Oct 27, 2026SCHEDULE 13GPassive beneficial ownership report (over 5%)Document · Index
Oct 13, 20268-KRegulation FD disclosure· period Oct 12, 2026Document · Index
Sep 11, 2026S-3ASRSimplified registration statementDocument · Index
Sep 11, 2026S-8Registration of employee benefit plan securitiesDocument · Index
Sep 8, 20263Initial statement of beneficial ownership· period Aug 26, 2026Document · Index
Sep 8, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Sep 8, 2026SCHEDULE 13GPassive beneficial ownership report (over 5%)Document · Index
Sep 2, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 1, 2026Document · Index
Sep 2, 20263Initial statement of beneficial ownership· period Sep 1, 2026Document · Index
Aug 19, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 19, 2026SCHEDULE 13D/AActive beneficial ownership report (over 5%)Document · Index
Aug 17, 2026SCHEDULE 13D/AActive beneficial ownership report (over 5%)Document · Index
Aug 13, 202610-QQuarterly report· period Jun 30, 2026Document · Index
Aug 13, 20268-KResults of operations; Director or officer change· period Aug 12, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
May 18, 20264Statement of changes in beneficial ownership (insider trade)· period May 18, 2026Document · Index
May 13, 202610-QQuarterly report· period Mar 31, 2026Document · Index
May 13, 20268-KResults of operations; Director or officer change; Shareholder vote results· period May 11, 2026Document · Index
May 5, 2026SCHEDULE 13DActive beneficial ownership report (over 5%)Document · Index
Apr 29, 20264Statement of changes in beneficial ownership (insider trade)· period Apr 28, 2026Document · Index
Apr 2, 2026SCHEDULE 13D/AActive beneficial ownership report (over 5%)Document · Index
Apr 2, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 31, 2026Document · Index
Apr 1, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 31, 2026Document · Index
Mar 31, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 30, 2026Document · Index
Mar 31, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 31, 2026Document · Index
Mar 31, 20268-KMaterial agreement; New financial obligation; Other events· period Mar 26, 2026Document · Index
Mar 30, 2026424B5424B5Document · Index
Mar 30, 2026424B5424B5Document · Index
Mar 27, 2026FWPFWPDocument · Index
Mar 27, 2026FWPFWPDocument · Index
Mar 26, 2026424B5424B5Document · Index

Insider filing activity

21 Form 4 filings appear in Zenas BioPharma, Inc.’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0001953926 and XBRL company facts. Zenas BioPharma, Inc. on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.