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Michael Stock

CIK 1705066 · Chief Financial Officer · last filed 2026-08-04

Michael Stock is a Chief Financial Officer who has filed 90 SEC Form 4 insider transactions across 1 company since 2018. The most recent filing, for LBRT, was dated Aug 4, 2026. Across all open-market trades the lifetime net is −$21.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $15.5M 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

$15.48M

Companies

1

Total Filings

90

Lifetime Open-Market Net

-$21.76M

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
LBRT Chief Financial Officer 770,378 $20.10 $15.48M -$21.76M 63 2026-08-04

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
2026-08-04 LBRT Notice (144) −3,333 -$66.7K EDGAR
2026-08-04 LBRT Sell (S) −6,666 -$126.5K EDGAR
2026-08-03 LBRT Notice (144) −3,333 -$59.8K EDGAR
2026-07-01 LBRT Notice (144) −9,999 -$258.9K EDGAR
2026-07-01 LBRT Sell (S) −9,999 -$258.9K EDGAR
2026-06-02 LBRT Notice (144) −3,333 -$103.3K EDGAR
2026-06-02 LBRT Sell (S) −16,665 -$496.1K EDGAR
2026-06-01 LBRT Notice (144) −13,332 -$392.8K EDGAR
2026-05-20 LBRT Notice (144) −19,998 -$669.4K EDGAR
2026-05-20 LBRT Sell (S) −19,998 -$669.5K 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.