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MICHAEL S BROWN

CIK 1174475 · last filed 2026-01-06

MICHAEL S BROWN is a corporate insider who has filed 90 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for REGN, was dated Jan 6, 2026. Across all open-market trades the lifetime net is −$73.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $5.5M 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

$5.47M

Companies

2

Total Filings

90

Lifetime Open-Market Net

-$73.07M

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 Director 7,865 $695.63 $5.47M -$73.07M 81 2026-01-06
PFE Director — $25.12 — $0 5 2011-04-28

Recent Filings

90 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
2026-01-06 REGN Grant (A) +155 $0 EDGAR
2025-01-06 REGN Grant (A) +166 $0 EDGAR
2024-06-17 REGN Mixed — -$636.1K EDGAR
2024-06-14 REGN Notice (144) −1,535 -$1.58M EDGAR
2024-05-29 REGN Mixed — -$409.3K EDGAR
2024-05-28 REGN Notice (144) −1,172 -$1.15M EDGAR
2024-01-04 REGN Grant (A) +135 $0 EDGAR
2023-12-29 REGN Mixed — -$851.0K EDGAR
2023-12-27 REGN Notice (144) −2,049 -$1.74M EDGAR
2023-04-24 REGN Mixed — -$854.7K EDGAR
Showing 1–10 of 90
Page 1 of 9
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.