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ZENAS BIOPHARMA INC (ZBIO)

Institutional ownership, SEC filings and insider activity

Sector: Healthcare & Pharma · SEC CIK 0001953926 · EDGAR filings · Updated 2026-06-17

ZENAS BIOPHARMA INC (ZBIO) has reported institutional ownership of 87.7%, with 139 institutional managers holding positions valued at $1.10B per the latest 13F reporting period. SEC filings include an active substantial-doubt (going concern) disclosure per the filings.

Institutional ownership
87.7%
Institutional managers
139
Reported 13F value
$1.10B
Insider activity
22 trans.
$25.0M net buying
Data flags
1 active
from SEC filings

Latest updates

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, ZENAS BIOPHARMA INC has 139 institutional holders and institutional ownership of 87.7%.

Insider activity

Insiders reported 22 transactions (22 buys, 0 sells) across 9 reporting insiders, with a net reported value of $25.0M.

Data flags from SEC filings

Active substantial-doubt (going concern) disclosure per the filings, most recently filed 2026-03-16 (recurring since 2025-11-12) — source filing. The authoritative details are those stated in the filing itself.

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Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-06-17.