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LEONARD S SCHLEIFER

CIK 1218629 · Bd. Co-Chair, President & CEO · last filed 2026-01-05

LEONARD S SCHLEIFER is a Bd. Co-Chair, President & CEO who has filed 53 SEC Form 4 insider transactions across 1 company since 2007. The most recent filing, for REGN, was dated Jan 5, 2026. Across all open-market trades the lifetime net is −$458.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $257.8M across reported positions.

"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

$257.79M

Companies

1

Total Filings

53

Lifetime Open-Market Net

-$458.80M

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 Bd. Co-Chair, President & CEO 370,577 $695.63 $257.79M -$458.80M 50 2026-01-05

Recent Filings

53 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
2026-01-05 REGN Mixed — -$22.06M EDGAR
2025-12-11 REGN Mixed +17,578 -$12.86M EDGAR
2024-06-13 REGN Mixed −24,213 -$25.61M EDGAR
2024-06-12 REGN Notice (144) −1,000 -$1.03M EDGAR
2024-06-10 REGN Sell (S) −787 -$798.8K EDGAR
2024-06-06 REGN Notice (144) −25,000 -$25.13M EDGAR
2024-05-17 REGN Sell (S) −22,830 -$22.36M EDGAR
2024-05-15 REGN Mixed +22,830 -$95.08M EDGAR
2024-05-14 REGN Notice (144) −58,771 -$57.60M EDGAR
2023-12-13 REGN Mixed +12,314 -$10.84M EDGAR
Showing 1–10 of 53
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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.