Michael Stubblefield

CIK 1776153 · President & CEO · last filed 2025-05-21

Michael Stubblefield is a President & CEO who has filed 30 SEC Form 4 insider transactions across 3 companies since 2019. The most recent filing, for AVTR, was dated May 21, 2025. Across all open-market trades the lifetime net is −$35.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $16.7M 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

$16.71M

Companies

3

Total Filings

30

Lifetime Open-Market Net

-$35.20M

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
AVTR President & CEO 1,764,513 $9.39 $16.57M $314.2K 13 2025-05-21
IR Director 1,857 $74.00 $137.4K $0 3 2023-08-08
Avantor, Inc. (AVTRpA) Delisted President and CEO 1,713,041 $90.81 $155.56M -$35.52M 14 2022-05-06

Recent Filings

30 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2025-05-21 AVTR Gift (G) $0 EDGAR
2025-02-26 AVTR Tax (F) −11,769 -$206.1K EDGAR
2025-02-24 AVTR Mixed +142,558 -$253.9K EDGAR
2024-02-27 AVTR Grant (A) +107,802 $0 EDGAR
2024-02-26 AVTR Mixed +33,196 -$1.61M EDGAR
2024-02-22 AVTR Tax (F) −9,711 -$233.5K EDGAR
2023-08-08 IR Exer (M) +1,857 $0 EDGAR
2023-05-30 AVTR Gift (G) $0 EDGAR
2023-05-19 AVTR Tax (F) −106,200 -$2.15M EDGAR
2023-02-27 AVTR Mixed +83,897 -$371.7K EDGAR
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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.