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Public ownership evidence

Zenas BioPharma, Inc. Common Stock (ZBIO) Ownership Disclosures

Read ZBIO insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-14T23:32:50.005Z

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2026-09-032026-09-01Oliger Christy J.A37,000Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-01 and its public availability date is 2026-09-03. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code A: a award. An award is an acquisition but is not an open-market purchase. A purchase-following rule must not count it as code P.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001104659-26-104728 ↗13F 0002110329-26-000015 ↗13F 0002110329-26-000014 ↗

Recent Form 4 activity

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2026-09-032026-09-01Oliger Christy J.A37,000Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2926$660None
Cornerstone Financial Management LLC2026-03-312026-08-2926$508None
Cornerstone Financial Management LLC2025-12-312026-08-2926$944None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2529,471$747,974None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25747,974$29,471,000None
Royalty Pharma Sub-Manager, LLC2026-06-302026-08-222,388,150$60,611,247None
Royalty Pharma Sub-Manager, LLC2026-03-312026-08-222,388,150$46,688,333None
Royalty Pharma Sub-Manager, LLC2025-12-312026-08-221,263,150$45,864,977None
Rafferty Asset Management, LLC2026-06-302026-08-1537,509$951,978None
Vestal Point Capital, LP2026-06-302026-08-15365,000$9,263,700None
ENAVATE SCIENCES GP, LLC2026-06-302026-08-153,919,159$99,468,255None
Ameritas Advisory Services, LLC2026-06-302026-08-1542$1,066None
CSM Advisors, LLC2026-06-302026-08-1567,622$1,716,000None
XTX Topco Ltd2026-06-302026-08-1540,034$1,016,063None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15302,085$7,666,917None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15302,085$7,666,917None
OSAIC HOLDINGS, INC.2026-06-302026-08-15295$7,487None
Squarepoint Ops LLC2026-06-302026-08-15125,185$3,177,195None
MetLife Investment Management, LLC2026-06-302026-08-1517,041$432,501None
Engineers Gate Manager LP2026-06-302026-08-1512,980$329,432None
Birchview Capital, LP2026-06-302026-08-1593,601$2,375,593None
JANE STREET GROUP, LLC2026-06-302026-08-1539,000$989,820Call
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-1533,280$844,646None
SPHERA FUNDS MANAGEMENT LTD.2026-06-302026-08-15230,834$5,858,567None
Legal & General Group Plc2026-06-302026-08-1511,926$302,681None
Legal & General Group Plc2026-06-302026-08-155,330$135,275None
Legal & General Group Plc2026-06-302026-08-152,767$70,226None
HRT FINANCIAL LP2026-06-302026-08-158,879$225,000None
Verition Fund Management LLC2026-06-302026-08-1572,988$1,852,435None
Verition Fund Management LLC2026-06-302026-08-1572,988$1,852,435None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15226,200$5,740,956Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1518,900$479,682Put
SEVEN GRAND MANAGERS, LLC2026-06-302026-08-15100,000$2,538,000None
Exome Asset Management LLC2026-06-302026-08-1552,443$1,331,003None
J. Goldman & Co LP2026-06-302026-08-1568,232$1,731,728None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-15660,470$16,762,729None
VARCOV Co.2026-06-302026-08-1510,505$266,617None
Scientech Research LLC2026-06-302026-08-159,028$229,131None
Sio Capital Management, LLC2026-06-302026-08-15208,557$5,293,177None
Atom Investors LP2026-06-302026-08-1537,149$942,842None
Balyasny Asset Management L.P.2026-06-302026-08-15576,717$14,637,077None
Freestone Grove Partners LP2026-06-302026-08-151$25None
Polar Capital Holdings Plc2026-06-302026-08-152,412,772$61,236,153None
Woodline Partners LP2026-06-302026-08-15590,539$14,987,880None
NEXTBio Capital Management LP2026-06-302026-08-15426,736$10,830,560None
Rock Springs Capital Management LP2026-06-302026-08-15502,077$12,742,714None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-154$102None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15125$3,173None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1530,579$776,095None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1510$254None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Royalty Pharma Sub-Manager, LLC ↗Royalty Pharma Sub-Manager, LLC ↗Royalty Pharma Sub-Manager, LLC ↗Rafferty Asset Management, LLC ↗Vestal Point Capital, LP ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.