SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
HornScout

Company profile

ZBIO

Zenas BioPharma, Inc.
NASDAQHealth Care

Latest close: 24.84 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Oct 13, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  2. Aug 19, 2026Notice of sale · Form 144Zebra Aggregator, LP · Affiliate · $31.9MOpen the filing ↗
  3. Aug 13, 2026Quarterly report · 10-QFiled by the company itself.Open the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record16227 flagged findings
Reported transactions (Form 4)80since Sep 16, 2024 · and 32 other holdings
Corporate events (8-K)12since Jun 12, 2025

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2026-05-13share offering or dilution eventrecentOpen filing ↗
    “…on April 1, 2032, unless earlier converted, redeemed or repurchased by us. Holders of Convertible Notes will have the right to…”
    +1 more passage from the same document
    • “…sales proceeds of up to $ 200.0 million, in a series of one or more at-the-market equity offerings (“2025 ATM Program”). The…”
  • 2026-05-13capital return (buybacks/dividends)recentOpen filing ↗
    “…and our ability to service or repay our indebtedness and secured obligations will increase. We may be unable to raise the…”
    +1 more passage from the same document
    • “…Notes for cash following a fundamental change or to pay any cash amounts due upon maturity or conversion of the Convertible…”
  • 2026-03-31share offering or dilution eventrecentOpen filing ↗
    “…principal amount of Notes, solely to cover over-allotments in the Convertible Notes Offering, on the same terms and…”
    +1 more passage from the same document
    • “…check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial…”
  • 2026-03-31capital return (buybacks/dividends)recentOpen filing ↗
    “…in which case the conversion rate applicable to the conversion of that Note will be increased in certain circumstances if it is…”
    +1 more passage from the same document
    • “…rate applicable to the conversion of that Note will be increased in certain circumstances if it is converted after it is called for…”
  • 2026-03-30share offering or dilution eventrecentOpen filing ↗
    “…​ ▪ 773,122 shares of our common stock reserved for future issuance under our 2024 ESPP, which increased to 1,317,977 effective…”
    +1 more passage from the same document
    • “…reflected in the as adjusted column in the table below, will take place. ​ ​ ​ As of December 31, 2025 ​ (in thousands, except share…”
  • 2026-03-30capital return (buybacks/dividends)recentOpen filing ↗
    “…to that note, in which case the conversion rate applicable to the conversion of that note will be increased in certain…”
    +1 more passage from the same document
    • “…the conversion rate applicable to the conversion of that note will be increased in certain circumstances if it is converted after it…”
  • 2026-03-30share offering or dilution eventrecentOpen filing ↗
    “…date in the first quarter of 2026 from sales under our ATM Program and proceeds of $75.0 million from the first tranche under the…”
    +1 more passage from the same document
    • “…or approximately $ 107.8 million if the underwriters exercise in full their option to purchase additional shares of common stock, in…”
  • 2026-03-30capital return (buybacks/dividends)recentOpen filing ↗
    “…note, in which case the conversion rate applicable to the conversion of that convertible note will be increased in certain…”
    +1 more passage from the same document
    • “…rate applicable to the conversion of that convertible note will be increased in certain circumstances if it is converted…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 162)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Oct 13, 268-K ↗Current report · Communication to the market new
  • Sep 11, 26S-3ASR ↗Securities offering
  • Sep 8, 26Form 3 ↗Insider transaction
  • Sep 8, 26SCHEDULE 13G/A ↗Passive stake · InnoCare Pharma Inc. · 10.4% · event on Aug 26, 26 · amendment
  • Sep 8, 26SCHEDULE 13G ↗Passive stake · Wellington Management Group LLP · 10.1% · event on Aug 31, 26
  • Sep 2, 26Form 4 ↗Insider transaction
  • Sep 2, 26Form 3 ↗Insider transaction
  • Aug 19, 26Form 144 ↗Notice of proposed sale
  • Aug 19, 26SCHEDULE 13D/A ↗Stake with intent to influence · Enavate Sciences GP, LLC · 4.9% · amendment
  • Aug 17, 26SCHEDULE 13D/A ↗Stake with intent to influence · SR One Capital Management, LLC · 7.7% · event on Aug 13, 26 · amendment
  • Aug 13, 2610-Q ↗Quarterly report
  • Aug 13, 268-K ↗Current report · A senior executive left or was appointed
  • Insider transaction · 11 Form 4 filingsshow all 11hide
  • May 13, 2610-Q ↗Quarterly report
  • May 13, 268-K ↗Current report · A senior executive left or was appointed

162 filings on record, the oldest from Feb 21, 24.

Listing the 25 most recent filings of the 162 on record.

8-Ks, explained

Structure7Governance5
  • Aug 13, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • May 13, 26GovernanceA senior executive left or was appointed+3 more in the same filing8-K 5.02 ↗
  • Mar 31, 26StructureEntered a material agreement+3 more in the same filing8-K 1.01 ↗
  • Feb 13, 26GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Dec 15, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Oct 8, 25StructureEntered a material agreement+5 more in the same filing8-K 1.01 ↗
  • Sep 2, 25StructureEntered a material agreement+4 more in the same filing8-K 1.01 ↗
  • Jun 12, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13D: stake and stated purpose

Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.

  • SR One Capital Management, LLC7.7%Aug 13, 26SCHEDULE 13D/A ↗8 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • MOULDER LEON O JR5.1%Apr 29, 26SCHEDULE 13D ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
  • Enavate Sciences GP, LLC4.9%Aug 19, 26SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • Patrick G. Enright4.9%Oct 9, 25SCHEDULE 13D/A ↗6 co-filers on this document — the figure is the largest single stake, not their sum.
  • Leon O. Moulder, Jr.4.8%Mar 31, 26SCHEDULE 13D/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 3 earlier filings

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • FMR LLC14.3%Dec 31, 25SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 3 earlier filings
  • InnoCare Pharma Inc.10.4%Aug 26, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
  • Wellington Management Group LLP10.1%Aug 31, 26SCHEDULE 13G ↗4 co-filers on this document — the figure is the largest single stake, not their sum.
  • Novo Holdings A/S4.7%Sep 30, 25SCHEDULE 13G/A ↗1 earlier filing

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

Sale intention announced

On Aug 19, Zebra Aggregator, LP filed notice of intent to sell up to $31.9M. That is about 1.53% of shares outstanding.

A notice is not a sale: it may not go ahead, may happen in part, or at a different price.

No sale of theirs is on record yet in Form 4; the 90-day window is still open.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • May 18, 26Buy$1.0MLEON O MOULDER JRChief Executive Officer↗
  • Apr 29, 26Buy$617KLEON O MOULDER JRChief Executive Officer↗
  • Apr 28, 26Buy$451KLEON O MOULDER JRChief Executive Officer↗
  • Mar 31, 26Buy$3.0MFairmount Funds Management LLC↗
  • Mar 31, 26Buy$70KHongbo Lu↗
  • Mar 31, 26Buy$1.5MHongbo Lu↗
  • Mar 31, 26Buy$657KLEON O MOULDER JRChief Executive Officer↗
  • Mar 30, 26Buy$365KLEON O MOULDER JRChief Executive Officer↗
  • Feb 13, 26Buy$110KPatricia L Allen↗
  • Feb 12, 26Buy$119KPatricia L Allen↗
  • Feb 12, 26Buy$139KPatricia L Allen↗
  • Feb 12, 26Buy$133KPatricia L Allen↗

There are 23 more transactions in this stretch.

Stock compensation, tax and giftsshow the 5 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Feb 5, 26Compensation$21KJennifer A. FoxSee Remarks↗
  • Feb 5, 26Compensation$13KJoseph L FarmerSee Remarks↗
  • Sep 16, 24Otheramount n/aLEON O MOULDER JRChief Executive Officer↗
  • Sep 16, 24Otheramount n/aLEON O MOULDER JRChief Executive Officer↗
  • Sep 16, 24Otheramount n/aLEON O MOULDER JRChief Executive Officer↗

The full record holds 75 transactions and goes back to Sep 12, 24.

Its sector and its market

Zenas BioPharma, Inc. among Health Care companies

The profile shows what is on record. Context and Radar place the company among those of its sector and region.

With an account you also get

  • The four engines — growth, trend, risk and context — each with its word and its score.
  • The risk band and the sector phase.
  • The company's fundamentals and accounts.
  • Watchlist: your list of companies, with the «since you follow it» figure.

The research continues

The profile tells the story. The market sets the scene.

From Zenas BioPharma, Inc., the path continues in the other areas. Each one is shown with its own example, named in its step.

  1. Place it in its market

    Seven layers of its region's market — rates, credit, stress, liquidity, regime, breadth and sectors — with historical precedents. Public example: Apple and ASML.

    See how Context works →
  2. See what deserves a closer look

    Every morning Radar screens the covered companies through a lens and explains why each candidate made the list. Public example: the lists from Aug 11, 2026.

    See how Radar works →
  3. Keep the why

    Follow Zenas BioPharma, Inc. in the Watchlist and review what changed since you added it: context, notices and filings. Written theses are coming soon. Public example: Apple.

    See an example review →

Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
Series with incidents in the period; the chart shows what could be kept.
SEC records
162 documents on file, from Feb 21, 2024 to Oct 13, 2026.
Company description
No description available.
This page
Generated on Oct 19, 2026; refreshed through the day.

Start at your own pace

Explore first. Go deeper with access.

Every company's public profile is open. The full reading — context, Radar, watchlist — is inside, in an invitation-only beta.

Compare plans →
  • No account

    This profile for every company we cover: closing prices with the record's facts on the curve, the SEC file in plain language, insider trades included, and links to its sector and exchange.

  • Pro

    What matters today, with its reason, is free with an account. Pro adds, in the profile, each company's notices and their explanation and the analysis of its insiders; in Radar, all the lenses, which notice each candidate carries, filters by notice type and «no dilution», and the cycle cohort filter; and in Watchlist, more companies and notice changes with their reason.

  • Pro+

    Adds the Lab: test a hypothesis on comparable cohorts before reusing it; and bring your lenses to Radar.

Are the prices real time?

No. It is one close per session, from the provider and with the date shown on the profile; it does not update during the trading day.

Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

Why does a European company show no SEC records?

It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.

Before forming a view on a company,
read what is on record.

One close per session. The record in plain language. Its sector and its market one link away. Your judgment when deciding.

Access by invitation while the beta lasts. Not advice: the profile shows what is on record; it does not recommend.