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Public ownership evidence

Regeneron Pharmaceuticals Inc (REGN) Ownership Disclosures

Read REGN 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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2026-11-062026-11-04Pitofsky JasonS108Not reported

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

The displayed observation date is 2026-11-04 and its public availability date is 2026-11-06. 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 S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

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 0002009236-26-000003 ↗SEC 0002009236-26-000003 ↗SEC 0002009236-26-000003 ↗

Recent Form 4 activity

Inspect all 50 displayed rows: Recent Form 4 activity

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2026-11-062026-11-04Pitofsky JasonS108Not reported
2026-11-062026-11-04Pitofsky JasonS529Not reported
2026-11-062026-11-04Pitofsky JasonS1,215Not reported
2026-11-062026-11-04Pitofsky JasonS982Not reported
2026-11-062026-11-04Pitofsky JasonS575Not reported
2026-11-062026-11-04Pitofsky JasonS439Not reported
2026-11-062026-11-04Pitofsky JasonS179Not reported
2026-11-062026-11-04Pitofsky JasonS35Not reported
2026-11-052026-11-03Zoghbi Huda YS500Not reported
2026-11-052026-11-03Zoghbi Huda YS6,939Not reported
2026-11-042026-11-02SING GEORGE LS1,522Not reported
2026-11-042026-11-02SING GEORGE LS7,073Not reported
2026-11-042026-11-02SING GEORGE LS2,670Not reported
2026-11-042026-11-02SING GEORGE LS4,338Not reported
2026-11-042026-11-02SING GEORGE LS2,522Not reported
2026-11-042026-11-02SING GEORGE LS540Not reported
2026-11-042026-11-02SING GEORGE LS1,224Not reported
2026-11-042026-11-02SING GEORGE LS200Not reported
2026-11-042026-11-02SING GEORGE LS1,040Not reported
2026-11-042026-11-02POON CHRISTINE AS201Not reported
2026-11-042026-11-02POON CHRISTINE AS937Not reported
2026-11-042026-11-02POON CHRISTINE AS3,203Not reported
2026-11-042026-11-02POON CHRISTINE AS2,499Not reported
2026-11-042026-11-02POON CHRISTINE AS772Not reported
2026-11-042026-11-02POON CHRISTINE AS218Not reported
2026-11-042026-11-02LAROSA JOSEPH JS527Not reported
2026-11-042026-11-02LAROSA JOSEPH JS3,939Not reported
2026-11-032026-10-30Guarini KathrynS400Not reported
2026-11-032026-10-30BROWN MICHAEL SS1,929Not reported
2026-11-032026-10-30McCourt MarionS1,132Not reported
2026-10-152026-10-14MURPHY ANDREW JS27Not reported
2026-10-152026-10-14MURPHY ANDREW JS74Not reported
2026-10-152026-10-14MURPHY ANDREW JS14Not reported
2026-10-152026-10-14MURPHY ANDREW JS24Not reported
2026-10-152026-10-14MURPHY ANDREW JS16Not reported
2026-10-152026-10-14MURPHY ANDREW JS35Not reported
2026-10-152026-10-14MURPHY ANDREW JS6Not reported
2026-10-152026-10-14MURPHY ANDREW JS50Not reported
2026-10-152026-10-14MURPHY ANDREW JS463Not reported
2026-10-152026-10-14MURPHY ANDREW JS380Not reported
2026-10-152026-10-14MURPHY ANDREW JS454Not reported
2026-10-152026-10-14MURPHY ANDREW JS38Not reported
2026-10-152026-10-14MURPHY ANDREW JS66Not reported
2026-10-152026-10-14MURPHY ANDREW JS376Not reported
2026-10-152026-10-14MURPHY ANDREW JS121Not reported
2026-10-152026-10-14MURPHY ANDREW JS224Not reported
2026-10-152026-10-14MURPHY ANDREW JS211Not reported
2026-10-152026-10-14MURPHY ANDREW JS283Not reported
2026-10-152026-10-14MURPHY ANDREW JS12Not reported
2026-10-152026-10-14MURPHY ANDREW JS127Not 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 LLC2026-06-302026-08-2914$8,730None
Cornerstone Financial Management LLC2026-03-312026-08-2911$8,499None
Cornerstone Financial Management LLC2025-12-312026-08-297$5,403None
B. Riley Wealth Advisors, Inc.2025-03-312026-08-29322$204,345None
Advisors Asset Management, Inc.2021-12-312026-08-2810,812$6,827,994None
Advisors Asset Management, Inc.2022-12-312026-08-288,346$6,021,556None
Advisors Asset Management, Inc.2020-06-302026-08-2823,369$14,574,077None
Advisors Asset Management, Inc.2022-06-302026-08-288,032$4,748,000None
Advisors Asset Management, Inc.2021-09-302026-08-2813,454$8,142,000None
Corient Private Wealth LP2026-06-302026-08-2810,915$6,806,894None
Corient Private Wealth LP2026-06-302026-08-281,558$971,844None
Principia Wealth Advisory, LLC2026-06-302026-08-275$3,118None
Principia Wealth Advisory, LLC2026-03-312026-08-275$3,863None
Advisors Asset Management, Inc.2024-03-312026-08-277,617$7,331,286None
Advisors Asset Management, Inc.2025-03-312026-08-275,369$3,405,181None
Advisors Asset Management, Inc.2022-09-302026-08-277,888$5,434,000None
Advisors Asset Management, Inc.2020-12-312026-08-2721,719$10,493,000None
Advisors Asset Management, Inc.2022-03-312026-08-278,721$6,090,921None
Advisors Asset Management, Inc.2023-06-302026-08-279,014$6,476,920None
Advisors Asset Management, Inc.2023-09-302026-08-279,395$7,731,709None
Advisors Asset Management, Inc.2023-03-312026-08-279,688$7,960,339None
Advisors Asset Management, Inc.2021-03-312026-08-2716,993$8,040,068None
Advisors Asset Management, Inc.2021-06-302026-08-2714,104$7,878,000None
Advisors Asset Management, Inc.2020-09-302026-08-2722,256$12,458,464None
Advisors Asset Management, Inc.2025-09-302026-08-273,426$1,926,337None
Advisors Asset Management, Inc.2023-12-312026-08-278,374$7,354,800None
Dakota Wealth Management2025-09-302026-08-271,408$791,677None
Dakota Wealth Management2025-12-312026-08-273,126$2,412,866None
Dakota Wealth Management2026-03-312026-08-272,147$1,658,948None
Redwood Investment Management, LLC2025-12-312026-08-271,422$1,098,000None
Advus Financial Partners, LLC2021-09-302026-08-26433$273,448None
Groupe la Francaise2026-06-302026-08-26553$320,937None
Advisors Asset Management, Inc.2019-12-312026-08-2620,787$7,805,103None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-2625,474$19,682,231None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2625,474$15,884,058None
Advisors Asset Management, Inc.2025-06-302026-08-254,488$2,356,200None
CYBER HORNET ETFs LLC2026-06-302026-08-25275$171,474None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25156,724$97,723,683None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2597,723,683$156,724,000None
Advisors Asset Management, Inc.2024-09-302026-08-225,608$5,895,354None
Advisors Asset Management, Inc.2024-06-302026-08-226,633$6,971,482None
Advisors Asset Management, Inc.2024-12-312026-08-225,165$3,679,184None
Advisors Asset Management, Inc.2025-12-312026-08-223,270$2,524,015None
Advisors Asset Management, Inc.2020-03-312026-08-2221,765$10,627,632None
Assenagon Asset Management S.A.2026-06-302026-08-22244,927$152,721,782None
HARVEY CAPITAL MANAGEMENT INC2026-06-302026-08-224,975$3,102,112None
Harvest Fund Management Co., Ltd2026-06-302026-08-217,900$4,926,000None
Rehmann Capital Advisory Group2026-06-302026-08-211,812$1,130,028None
Kingsview Wealth Management, LLC2026-06-302026-08-20675$420,910None
Nantahala Capital Management, LLC2026-06-302026-08-2040,000$24,941,600Call

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

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗B. Riley Wealth Advisors, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Corient Private Wealth 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.