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Public ownership evidence

Geron Corp (GERN) Ownership Disclosures

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

As of 2026-11-07T14:03:26.246Z

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2026-10-012026-09-30Spiegel Robert J.A6,351Not reported

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

The displayed observation date is 2026-09-30 and its public availability date is 2026-10-01. Subtracting those calendar dates gives 1 day 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 0001492256-26-000009 ↗13F 0001172661-26-004258 ↗13F 0001948780-26-000011 ↗

Recent Form 4 activity

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2026-10-012026-09-30Spiegel Robert J.A6,351Not 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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Alternative Investment Advisors, LLC.2026-06-302026-09-0139,278$50,276None
Corient Private Wealth LP2026-06-302026-08-2834,455$44,102None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25542,133$693,930None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25693,930$542,133,000None
Nantahala Capital Management, LLC2026-06-302026-08-2012,225,000$15,648,000None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2061,908$79,243None
Corient Private Wealth LP2026-06-302026-08-1835,167$45,013None
Seven Fleet Capital Management LP2026-06-302026-08-181,057,228$1,353,252None
TORONTO DOMINION BANK2026-06-302026-08-154,235,000$5,420,800None
SummitTX Capital, L.P.2026-06-302026-08-15657,024$840,991None
Graham Capital Management, L.P.2026-06-302026-08-15107,622$137,756None
SEI INVESTMENTS CO2026-06-302026-08-1533,408$42,762None
SEI INVESTMENTS CO2026-06-302026-08-15641$810None
Rafferty Asset Management, LLC2026-06-302026-08-15606,440$776,243None
Basecamp Wealth Advisors LLC2026-06-302026-08-15350$448None
Polymer Capital Management (US) LLC2026-06-302026-08-1582,499$105,599None
Quarry LP2026-06-302026-08-15999$1,279None
ADAR1 Capital Management, LLC2026-06-302026-08-15505,817$647,446None
Kynam Capital Management, LP2026-06-302026-08-156,836,318$8,750,487None
XTX Topco Ltd2026-06-302026-08-15463,897$593,788None
Frisch Financial Group, Inc.2026-06-302026-08-1519,025$24,352None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-154,284,662$5,484,367None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-154,284,662$5,484,367None
ExodusPoint Capital Management, LP2026-06-302026-08-152,526,145$3,233,466None
Qube Research & Technologies Ltd2026-06-302026-08-153,361,584$4,302,828None
Eversept Partners, LP2026-06-302026-08-1518,717,422$23,958,300None
OSAIC HOLDINGS, INC.2026-06-302026-08-155,300$6,784None
OSAIC HOLDINGS, INC.2026-06-302026-08-1522,970$29,402None
OSAIC HOLDINGS, INC.2026-06-302026-08-1583,154$106,434None
Schonfeld Strategic Advisors LLC2026-06-302026-08-15135,350$173,246None
Squarepoint Ops LLC2026-06-302026-08-15534,461$684,110None
Man Group plc2026-06-302026-08-15696,669$891,736None
MetLife Investment Management, LLC2026-06-302026-08-15327,983$419,818None
JANE STREET GROUP, LLC2026-06-302026-08-1534,600$44,288Put
JANE STREET GROUP, LLC2026-06-302026-08-15192,900$246,912Call
EVENTIDE ASSET MANAGEMENT, LLC2026-06-302026-08-1528,050$36,465None
Legal & General Group Plc2026-06-302026-08-15174,584$223,467None
Legal & General Group Plc2026-06-302026-08-1580,717$103,318None
Legal & General Group Plc2026-06-302026-08-1554,246$69,435None
DRW Securities, LLC2026-06-302026-08-15111,450$142,656None
Verition Fund Management LLC2026-06-302026-08-15200,000$256,000Call
Verition Fund Management LLC2026-06-302026-08-15173,689$222,322None
Verition Fund Management LLC2026-06-302026-08-15200,000$256,000Call
Verition Fund Management LLC2026-06-302026-08-15173,689$222,322None
Jasper Ridge Partners, L.P.2026-06-302026-08-1520,995$26,874None
GTS SECURITIES LLC2026-06-302026-08-1523,772$30,428None
MOORE CAPITAL MANAGEMENT, LP2026-06-302026-08-151,191,941$1,525,684None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15106,400$136,192Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15594,300$760,704Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-151,547,239$1,980,466None

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

Alternative Investment Advisors, LLC. ↗Corient Private Wealth LP ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Nantahala Capital Management, LLC ↗MERCER GLOBAL ADVISORS INC /ADV ↗Corient Private Wealth LP ↗Seven Fleet Capital Management LP ↗TORONTO DOMINION BANK ↗SummitTX Capital, L.P. ↗

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.