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Marion McCourt

CIK 1663758 · EVP Commercial · last filed 2026-09-03

Marion McCourt is an EVP Commercial who has filed 96 SEC Form 4 insider transactions across 4 companies since 2016. The most recent filing, for REGN, was dated Sep 3, 2026. Across all open-market trades the lifetime net is −$33.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.6M across reported positions. 83 SEC filings were submitted jointly with REGENERON PHARMACEUTICALS, INC.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$9.55M

Companies

4

Total Filings

96

Lifetime Open-Market Net

-$32.98M

Filer Profile

Reported Address
C/O REGENERON PHARMACEUTICALS, INC.
777 OLD SAW MILL RIVER ROAD
TARRYTOWN, NY 10591
Related Filers
REGENERON PHARMACEUTICALS, INC. — 83 joint filings, latest 2026-09-03
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
REGN EVP Commercial 12,222 $781.49 $9.55M -$32.98M 61 2026-09-03
SCYX Director — $4.84 — $0 9 2018-07-03
CTMX Director — $3.29 — $0 2 2017-06-22
MEDIVATION, INC. (MDVN) Delisted Chief Operating Officer 40,453 — — $0 2 2016-02-17

Recent Filings

96 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-09-03 REGN Notice (144) −1,131 -$969.3K EDGAR
2026-09-03 REGN Sell (S) −2,346 -$2.00M EDGAR
2025-12-11 REGN Tax (F) −1,021 -$716.2K EDGAR
2025-12-09 REGN Mixed +1,140 -$952.5K EDGAR
2024-12-18 REGN Tax (F) −759 -$554.7K EDGAR
2024-12-10 REGN Mixed +2,058 -$215.6K EDGAR
2024-11-05 REGN Mixed — -$463.2K EDGAR
2024-11-01 REGN Notice (144) −1,000 -$844.6K EDGAR
2024-10-03 REGN Mixed — -$672.7K EDGAR
2024-10-01 REGN Notice (144) −1,000 -$1.05M EDGAR
Showing 1–10 of 96
Page 1 of 10
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.